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    I'm looking for a skilled Python programmer to help with an Arduino project. Requirements: - Use a distance sensor (LIDAR) and a vibration (G-force) sensor. - Modify hardware behavior based on sensor inputs: - Illuminate LEDs based on...Requirements: - Use a distance sensor (LIDAR) and a vibration (G-force) sensor. - Modify hardware behavior based on sensor inputs: - Illuminate LEDs based on distance measurements. - Enter sleep mode if no vibration is detected. - Use ESP32 wireless transmission to provide secondary LED display which duplicates first LED display. Ideal Skills & Experience: - Proficiency in Python and Arduino programming. - Experience with LIDAR and G-force sensors. - Ability to implement hardware behavior modifications. - Experience with ESP32 wir...

    $9031 Average bid
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    3CX Live Chat Setup
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    Milestone 2 — 3CX Live Chat Implementation • installation and configuration of the official 3CX Live Chat widget • business hours routing (Mon–Fri, 9AM–5PM ET) • after-hours message capture • transcript forwarding to info@ • webhook/output preparation so Laravel developer can log chat leads to the database

    $392 / hr Average bid
    $392 / hr 平均报价
    1 个竞标

    I’m building a custom web application and need someone who can take it end-to-end. The front-end will be written in React and the back-end in Node.js. You’ll handle everything from setting up the project structure, routing, and reusable UI components to designing the API layer, database schema, and deployment pipeline. The core features will be discussed in our kickoff call, but the goal is a clean, responsive interface that talks seamlessly to a well-structured REST (or GraphQL, if you prefer) API. Authentication, role-based access, and solid test coverage are non-negotiable. I already have wireframes and user stories—your task is to translate them into production-ready code, advise on best practices, and document the setup so future contributors can step ...

    $4261 Average bid
    $4261 平均报价
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    I need an experienced VBA developer to convert an Excel spreadsheet into a user-friendly VBA program. The primary purpose of this program is to assist in data entry and management. Key requirements: - Automate data sorting and filtering tasks - Program should allow sorting by category and date Ideal skills and experience: - Proficiency in VBA programming - Strong experience with Excel, particularly in data management - Ability to design user-friendly interfaces - Attention to detail and problem-solving skills Please provide examples of similar work done. I have a financial ss wherin incomes and expenses are categorized and entered appropriately to track, summarize, and forecast up-to-the-minute financial conditions. At this time, it's focus is on the individu...

    $157 / hr Average bid
    $157 / hr 平均报价
    56 个竞标

    ...want to launch a browser-based random video chat site that feels as quick and effortless as Monkey or Omegle but gives me more control over user safety and matching logic. The core flow is simple: a visitor signs up with an email address, selects a few interests and (optionally) a preferred region, then clicks “Start.” The system pairs them instantly with someone who shares at least one interest and falls within the chosen region. A text chat panel runs alongside the live WebRTC video feed so users can type while they talk. Key functions I expect to see working end-to-end: • Email-only registration and login (no social logins or guest mode for now). • Real-time video chat powered by WebRTC or an equivalent low-latency stack. • Synchro...

    $5483 Average bid
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    Website Application
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    as discussed >>>>>> as discussed >>>>>> As discussed >>>>>>

    $8929 Average bid
    $8929 平均报价
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    We are looking for a Senior Java Backend Developer with deep expertise in high-performance data architectures to join our team. As we scale our career pathway platform, your primary focus will be optimizing how we store, retrieve, and search complex datasets. You will be responsible for bridging our robust Java/Spring services with a modern data stack centered around MongoDB and Elasticsearch to provide our users with lightning-fast, relevant results. Key Responsibilities * Data Architecture: Design and implement scalable data models in MongoDB, ensuring efficient document structures for high-speed read/write operations. * Search Optimization: Architect and maintain Elasticsearch clusters, including index management, custom mapping, and complex query DSL optimization to po...

    $8937 Average bid
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    153 个竞标

    I need a very small Universal Windows Platform (UWP) application whose sole purpose is to launch a local batch file, which in turn starts my existing Java-based desktop application. Once the finished UWP package has been provided, I will configure it as the single locked-down app in Windows 11 Assigned Access, so please also supply the Application User Model ID (AUMID). The launcher should display no user interface at all — no buttons, splash screen, status messages or other visible elements. Its only function is to execute a batch file stored locally on the device, using a path I will provide, and then hand off control to the Java application. No additional security controls, keyboard restrictions or logging are required; reliability...

    $1579 Average bid
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    130 个竞标

    ...but make sure every line that ends up in the repo is production-ready and human-reviewed. – Source and drop in high-resolution placeholders from the “Nano Banana 2” image set for all hero sections, thumbnails and blog headers. Optimise them so Lighthouse keeps green scores. Pages you will hand over Home, About-Us, Blog list, Single-post template, Services, Resources, FAQ, Testimonials, Contact and Privacy. Feel free to reshuffle copy blocks or component names, just keep the count at ten and the tone consistent with a corporate brand. Essential build notes • React functional components with hooks. • react-router-dom for navigation. • Modular SCSS or styled-components for a tidy code trail. • Fully responsive breakpoint...

    $4457 Average bid
    $4457 平均报价
    106 个竞标

    ...missing is an efficient, collision-free machining strategy that maximises tool life and keeps cycle times tight. Your job is to: • import my 3D files, • create roughing, semi-finish and finish operations suited to steel, • select appropriate cutters and holders, • verify everything with dynamic simulation, and • deliver the final .MCAM file along with a setup sheet and post-processed G-code for a Haas VF series mill. I’ll provide the solid model, fixture layout and any in-house tooling constraints the moment we start. Once the first part passes inspection, the same program will run a short production batch, so consistency and repeatability are critical. Let me know your experience with Mastercam in steel, the post you intend to use, and...

    $1817 Average bid
    $1817 平均报价
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    I need an informational website built from the ground up and want every piece of content—illustrations, creatives, related images and ani...section topic without manual intervention. • Visual style: “scroll” is key—I’m picturing parallax or smooth-scroll storytelling where each down-scroll triggers the next AI-generated asset. • Controls: an admin panel or simple script that lets me tweak prompts, refresh assets, and set cache lifetimes. • Deliverable: fully functioning informational site hosted on a staging URL, plus documented source code and setup notes so I can redeploy. If this resonates with your skill set and you’re confident working directly with Nanobanana 2 and Claude APIs for real-time image creation, let&rs...

    $4253 Average bid
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    I need a reliable personal shopper on the ground in Turkey to help me source stylish women’s two-piece tracksuit sets. I want to buy women’s two-piece sets (tracksuit style). I will send screenshots of the clothes I am looking for. I heard they can be found at places like Laleli and Merter. I only need sizes 42 or 44, and I am happy to buy different models and colors as long as the style is similar. Size needed: 42 or 44 Expected wholesale price: $20–35 I am looking to buy around 20 women’s two-piece sets (tracksuit style). I will attach screenshots of the styles I want. These styles come from Turkish wholesale Telegram sellers, but they only sell in full-size packs (4 sizes), and they refuse to sell single pieces. I only need sizes 42 or 44, and I am happ...

    $987 Average bid
    本地
    $987 平均报价
    3 个竞标

    Multilingual Voice Recording Project – Code-Switching Conversations Project Name: BV Project Type: Remote | Ongoing (Limited Slots per Locale) Project Overview Project BV is a multilingual speech data collection initiative designed to enhance Automatic Speech Recognition (ASR) systems for high-value multilingual call center scenarios, including financial services, healthcare, and telecommunications. The project focuses on collecting natural code-switching conversational audio, where speakers alternate between two languages within a single conversational turn. Scripts will be provided; however, natural delivery, fluency, and context-appropriate language switching are essential. Language Requirements Primary Language (Native level – one required): Ca...

    $4645 Average bid
    $4645 平均报价
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    ...full-time freelance basis. The role focuses on building applied AI solutions using Large Language Models (LLMs) to extract insights from data and create high-accuracy AI-powered applications. You will work closely with engineering teams to design, develop, and deploy scalable AI services. Responsibilities AI / Machine Learning Build and deploy AI-powered applications using existing Large Language Models (LLMs). Design systems that ingest data, extract structured insights, and generate accurate outputs. Develop RAG pipelines, chunking strategies, and LLM orchestration workflows. Build tools for model training, evaluation, inference serving, monitoring, and alerting. Experiment with modern ML frameworks and open-source AI tools. Software Engineering Develop ...

    $114415 Average bid
    $114415 平均报价
    110 个竞标

    I need a comprehensive design for a large restaurant kitchen (over 1500 sq ft) that meets all relevant codes and regulations. Essential Design Elements: - Multiple cooking stations - Dedicated prep areas - Fire suppression system with hood Ideal skills and experience: - Expertise in commercial kitchen design - Knowledge of health and safety regulations - Experience with fire suppression systems

    $505389 Average bid
    本地
    $505389 平均报价
    32 个竞标

    I need an experienced developer to take existing, functional code and integrate it into my social networking website. Requirements: - Experience with Android and Apple - Familiarity with social networking site functionalities - Advance the project into a fully functional app that can be downloaded onto a mobile device - Ability to troubleshoot and ensure code works seamlessly on the website Ideal Skills: - Strong background in app development - Knowledge of social networking algorithms and features - Problem-solving skills and attention to detail Please provide examples of similar work done.

    $11756 Average bid
    $11756 平均报价
    138 个竞标

    ...sebuah sistem admin chat online yang memungkinkan saya mengelola pesan otomatis agar percakapan dengan pelanggan tetap responsif bahkan di luar jam kerja. Fokus utama saya adalah menyiapkan pesan tindak lanjut yang dapat dipicu berdasarkan aktivitas pengguna—misalnya saat keranjang belanja ditinggalkan atau setelah dukungan pertama diberikan. Ruang lingkup pekerjaan: • Merancang dan membangun antarmuka admin berbasis web yang sederhana dan mobile-friendly. • Menyediakan modul “Kelola Pesan Otomatis” tempat saya dapat membuat, mengedit, dan menjadwalkan pesan tindak lanjut. • Menambahkan opsi pemicu (waktu, tindakan pengguna, atau kata kunci) untuk setiap pesan. • Integrasi dengan platform chat populer (WhatsApp Business API, Fac...

    $211 / hr Average bid
    $211 / hr 平均报价
    21 个竞标

    I need the current login screen taken out of my Android application so it launches straight into the normal content without asking for credentials. After the change every section that was previously locked behind the sign-in flow must be available immediately; no feature should remain restricted. You will either work from the existing source project (if you prefer) or safely de-compile the released APK, refactor the authentication logic, clean up any token checks, and rebuild a stable release. The final build must run on recent Android versions without crashes or dead ends where the old login once sat. Deliverables • Updated Android Studio project (or equivalent reconstructed code) with the login activity and related classes removed or bypassed • Releas...

    $1927 Average bid
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    40 个竞标

    I need an application developed for my Ph.D. thesis. The app should be built for both iOS and Android platforms. Key features: - User authentication - Data visualization - Offline mode Ideal skills and experience: - Mobile app development for iOS and Android - Experience with user authentication protocols - Expertise in data visualization techniques - Ability to implement offline functionality Please provide your relevant experience in your application.

    $5334 Average bid
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    189 个竞标

    I have a video that looks great except for one distracting element: an electrical socket and the cable running from it. I want that entire assembly erased so the wall appears clean and natural throughout the clip. Please use whichever approach you’re most comfortable with—AI-powered object removal, frame-by-frame cloning in Adobe After Effects, DaVinci Resolve, or any comparable software—as long as the result is invisible to the viewer. The lighting and texture on the wall must stay consistent, with no warping, blurring, or jumps once the socket and cable are gone. Deliverables: • Final video in its original resolution, frame rate, and codec, but now free of the socket and cable • A brief note on the method or software you used (e.g....

    $343 / hr Average bid
    $343 / hr 平均报价
    19 个竞标

    I need ...stay logged in during the agreed shift, read each inquiry carefully, and type concise, friendly, and accurate replies right away. I will provide you with a product guide, pricing sheet, and a short FAQ so you can resolve the majority of questions on the spot. Anything outside those boundaries can be flagged for me to handle later. No sales calls, no multi-platform juggling—just focused, real-time chat on WhatsApp. Deliverables: • Live responses throughout the scheduled window • A brief daily log of handled chats and any escalations • Suggestions for new FAQ entries when the same question pops up repeatedly If you already know basic WhatsApp Business features (quick replies, labels), that’s a plus, but the main requirement is speed, clari...

    $1386 Average bid
    $1386 平均报价
    26 个竞标

    ...of experience in Java Can connect offline places if u r nearby (Hinjewadi,wakad,Pimple Saudagar,pimpri, chinchwad) I need a Java-based backend whose sole purpose is controlling who can see and do what inside an admin portal. Think of it as the engine for authentication and fine-grained authorization; the front-end will call your APIs to sign users in, assign them the correct privileges, and block anything they are not entitled to. I am leaning toward Spring Boot with a familiar security stack (Spring Security, JWT or OAuth2), but if you have a cleaner Java solution I’m open to hearing it. The service must expose well-structured REST endpoints, persist its data reliably, and be easy for another developer to plug into a React admin UI later. Deliverables...

    $1645 Average bid
    $1645 平均报价
    39 个竞标

    *UPFATE AT BOTTOM OF AD * I’m working from a fully formed 3D conceptual model that exists in my head and can be illustrated and described clearly in terms of design and intended functionality. I’m looking for help translating that model into original, authored code. The work will be task-based and compartmentalized. Each contribution should be clean, readable, and logically transparent — no copy-paste solutions and no black-box abstractions. I need to be able to fully understand and verify the logic behind what’s written. *UPDATE* Before engaging anyone in detail, I wanted to confirm that the platform can support the type of work required for my project. Because of the nature of the system, I can’t disclose internal mechanisms or architecture at this...

    $59400 Average bid
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    74 个竞标

    Hello, I am looking for a technical code review of a Python-based equity index construction and total return calculation engine. The project consists of: Fundamental data processing and scoring (winsorization, sector normalization, percentile filtering) Portfolio construction with multiple constraints (sector caps, regional caps, individual weight caps) Iterative weight redistribution logic Total Return engine with dividend reinvestment and divisor methodology Annual rebalance + monthly drift control Scope of work: Verify mathematical correctness of scoring and normalization. Validate weight construction logic and constraint enforcement (ensure total weight = 100% after caps and redistribution). Review Total Return calculation: dividend reinvestment divisor adjustments rebalance mec...

    $3705 Average bid
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    74 个竞标

    ...orientation with the current code so you understand its flow and dependencies. • Implementation of the remaining features I will outline in our kick-off call—think small but critical touches that complete user journeys and admin controls. • Unit and integration tests for anything you add or refactor so coverage stays healthy. • Clean, readable commits and a short changelog describing each enhancement, making it easy for me to review. • Optional but appreciated: suggestions for minor refactors or optimisations you spot while working. Tech stack details, repo access, and an itemised feature list will be shared immediately after we agree on the collaboration model. Once the last feature is merged and tests pass, I’ll handle deployment; I simp...

    $846 Average bid
    $846 平均报价
    30 个竞标

    I need a complete Android application that lets patients of our dental clinic register with an email-and-password flow, browse live appointment slots, and book, reschedule, or cancel directly from their phone. The app must also surface each dentist’s profile, basic clinic info, and push or in-app reminders so no one misses a visit. Because we have no existing style guide, you will create a fresh, intuitive UI that feels friendly to every age group while staying lightweight for older Android devices. Security is critical—patient data, schedules, and notifications must be handled through well-structured, GDPR-aware code and modern Android best practices. Deliverables • Production-ready APK (and source) built in Kotlin or Java • Clea...

    $4347 Average bid
    $4347 平均报价
    113 个竞标

    I need an experienced Beckhoff TwinCAT engineer who can take full ownership of PLC programming, HMI development, and overall system integration for a medium-scale manufacturing line now entering its pre-production phase. The hardware is already in place (CX and EtherCAT I/O), so the focus is on creating clean, modular TwinCAT 3 code, building a responsive HMI that operators can learn in minutes, and tying everything together with reliable communication to our existing MES. Scope • Develop and document TwinCAT 3 PLC logic for motion, safety, and process control. • Design the HMI (TwinCAT HMI or your preferred Beckhoff-compatible platform) with alarm handling, recipe management, and diagnostics. • Integrate third-party devices over EtherCAT and Modbus TCP,...

    $4433 Average bid
    $4433 平均报价
    10 个竞标

    Project Title HR & Payroll Management System for Small and Medium Businesses Project Description I developed a complete HR and Payroll Management System designed to simplify employee management for small and medium-sized businesses. This web application helps organizations manage their daily HR operations in one place with an easy-to-use and professional interface. The system includes essential modules such as employee registration and approval, secure admin and employee login, attendance tracking, leave management, payroll processing, employee profile management, and task handling. Admins can approve newly registered employees before allowing access, which adds an extra layer of control and security. This project is built to reduce manual HR work, improve accuracy, and make ...

    $4458 Average bid
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    42 个竞标

    website as we discuss in chat 5 pages 200

    $2088 / hr Average bid
    $2088 / hr 平均报价
    1 个竞标

    I’m ready to launch an integrated gym management solution that covers a browser-based admin portal for owners and trainers plus companion mobile apps for members on both iOS and Android. Core functionality must include: • User registration and profile management for owners, trainers, and members • Workout tracking so members can log exercises, sets, reps, and progress • Class schedules with real-time booking, wait-listing, and trainer assignment The web interface will serve as the control center—creating classes, managing memberships, viewing attendance, and pulling basic analytics—while the mobile apps should mirror the member-side features in a clean, intuitive UI. I have no legacy systems to integrate, so you can choose the stack you’re...

    $2863 Average bid
    $2863 平均报价
    95 个竞标

    To amend and upgrade your 2022 Python website to current (2026) technology standards, the best approach is not just editing code, but restructuring it with a modern scalable architecture. Below is a recommended Python stack and structure for your requirement (Admin + Vendor + Dealer + Customer + CRM + Accounts). 1️⃣ Recommended Technology Stack (Modern & Scalable) Backend (Python) Use: Django Reason: Built-in admin panel Secure authentication Scalable for CRM & ERP modules Good for multi-login systems Alternative: FastAPI (for API-based system) Frontend Use: React or Bootstrap Database Use: PostgreSQL (best for ERP/CRM) Or MySQL Media Storage Cloud: Amazon Web Services Or local server storage 2️⃣ Required Portal Structure Your website should be converted...

    $94 Average bid
    $94 平均报价
    2 个竞标

    I’m ready to move from ideas to concrete plans for a modern-style farmhouse whose sole purpose is comfortable residential living. The building should blend clean contemporary lines with practical rural sensibilities—think generous glazing for countryside views, an open-plan interior that soaks up natural light, and materials that can stand up to a working farm environment without feeling austere. I will supply a detailed site survey and local zoning guidelines once we start. What I need back is a complete architectural package that lets me go straight to permitting and construction. Deliverables • Concept sketches showing massing and exterior character • Scaled floor plans and elevations (DWG + PDF) • A 3D model with walkthrough renders for stakeholder revi...

    $78 / hr Average bid
    $78 / hr 平均报价
    9 个竞标

    I’m ready to move from ideas to concrete plans for a modern-style farmhouse whose sole purpose is comfortable residential living. The building should blend clean contemporary lines with practical rural sensibilities—think generous glazing for countryside views, an open-plan interior that soaks up natural light, and materials that can stand up to a working farm environment without feeling austere. I will supply a detailed site survey and local zoning guidelines once we start. What I need back is a complete architectural package that lets me go straight to permitting and construction. Deliverables • Concept sketches showing massing and exterior character • Scaled floor plans and elevations (DWG + PDF) • A 3D model with walkthrough renders for stakeholder revi...

    $509 Average bid
    $509 平均报价
    6 个竞标

    ...Android application that connects two strangers at the tap of a button, exactly the way Connecto does. The core experiences I need working smoothly are: • Random voice calling • Random video calling (switchable during a session) • In-call and lobby text chat A clean, minimalist interface is important: one main “Start” button, instant pairing, and a small toolbar for mute, camera flip, end call, and report/block. I’m open to Kotlin or Java on the client side, and WebRTC (or any proven low-latency alternative) for the media layer. If you prefer Firebase, Node, or another stack for signalling and session control, just outline how you’ll keep it stable under load and how moderation/reporting will be handled. Deliverables 1...

    $9389 Average bid
    $9389 平均报价
    27 个竞标

    ...desktop application that consumes it smoothly. Your task is to create a reliable, user-friendly executable that interacts with the endpoints I supply, handles all requests and responses gracefully, and displays the data in a clean interface. You are free to choose the stack you are most comfortable with—C#/.NET (WPF or WinForms), Electron, or another Windows-friendly framework—so long as the final program runs natively on current Windows versions, installs easily, and requires no extra licensing costs. Deliverables • Compiled Windows installer (.exe or .msi) • Complete, well-commented source code • Brief README covering build steps, environment, and any third-party libraries • Basic user guide that explains setup, key screen...

    $744 Average bid
    $744 平均报价
    48 个竞标

    I need ...stay logged in during the agreed shift, read each inquiry carefully, and type concise, friendly, and accurate replies right away. I will provide you with a product guide, pricing sheet, and a short FAQ so you can resolve the majority of questions on the spot. Anything outside those boundaries can be flagged for me to handle later. No sales calls, no multi-platform juggling—just focused, real-time chat on WhatsApp. Deliverables: • Live responses throughout the scheduled window • A brief daily log of handled chats and any escalations • Suggestions for new FAQ entries when the same question pops up repeatedly If you already know basic WhatsApp Business features (quick replies, labels), that’s a plus, but the main requirement is speed, clari...

    $164 Average bid
    $164 平均报价
    11 个竞标

    I'm looking for a Selenium Java automation expert to build automation tests for a e-commerce web application. The tests need to support Chrome, Firefox, and Safari browsers. Key Requirements: - Create automation tests for: - Functional tests - Regression tests - Performance tests - Proficient in Selenium and Java - Experience with multi-browser support - Knowledge of test automation frameworks Ideal candidates will have a strong background in automation testing and Java ,Git, real time experience with the specified browsers, and the ability to deliver high-quality test scripts.

    $681 Average bid
    $681 平均报价
    44 个竞标

    Saya membutuhkan dukungan customer service live chat yang responsif sekaligus penerjemahan dari Bahasa Indonesia ke Inggris. Fokus utama Anda: • Menangani percakapan live chat di situs kami, menjaga nada ramah dan profesional. • Menggunakan fitur kemampuan transfer pesan agar isu pelanggan dapat dialihkan mulus ke tim terkait bila perlu. • Menerjemahkan pertanyaan, jawaban, atau dokumen singkat yang muncul selama sesi—semuanya akurat dan mudah dipahami penutur bahasa Inggris. • Mencatat poin penting setiap interaksi untuk referensi tim internal. Pengalaman sebelumnya dalam live chat, kefasihan dua bahasa, dan ketepatan tata bahasa sangat penting. Jika Anda terbiasa dengan platform chat modern (Zendesk, Intercom, atau serupa) dan dapat...

    $63 - $117 / hr
    $63 - $117 / hr
    0 个竞标

    ...home renovation (15 zones) in Dublin, Ireland. The property features a fully centralized KNX smart home architecture. I have a registered, professional electrical contractor handling 100% of the physical installation, including cable pulling, containment, 21U rack building, hardware mounting, and electrical safety testing. I am looking for an experienced KNX Integrator to handle the software programming, logic creation, and remote commissioning via ETS6, as well as the configuration of our Ubiquiti UniFi network. The Hardware Stack: All hardware is already specified and ordered. The system consists of: The Brain: MDT KNX Power Supply & MDT KNX IP Router. The UI: 1Home Server KNX Pro (Bridging native KNX to Apple HomeKit). The Switches: Faradite TAP-5 ORE KNX Keypads (8x...

    $7832 Average bid
    $7832 平均报价
    21 个竞标

    I’m looking for an experienced Shopify developer to improve my website by adding a popup and configuring an online chat feature. The popup may be used for promotions, announcements, or email collection. The online chat should allow visitors to easily contact us in real time. The developer should ensure the features are fully responsive, work smoothly on desktop, tablet, and mobile, and match the existing design and branding of the website. Attention to detail, clean implementation, and experience with Shopify apps are important. Required Skills Shopify Development Shopify Theme Customization Shopify Apps Integration HTML / CSS / Liquid JavaScript (basic customization)

    $1128 Average bid
    $1128 平均报价
    71 个竞标

    We are seeking a skilled developer to build a scalable, multi-tenant web application designed for retail and hospitality. The system must allow multiple independent merchants to create their own digital storefronts, manage orders, and handle payments through a centralized dashboard. Core Technical Requirements Multi-Tenant Architecture: Develop a robust system where each merchant has a private data environment, custom QR codes, and unique store settings. Payment Gateway Integration: Implement a secure, local payment gateway (API-based) to handle credit cards and digital wallets. The system must support automated payouts and transaction tracking. POS/Cashier App Integration: Connect the web platform with external Cloud POS/Cashier applications (e.g., Foodics or similar) to synchro...

    $18813 Average bid
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    229 个竞标
    Backend Refersure
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    Led the design and development of a scalable, secure, cloud-native referral management SaaS platform connecting job seekers, professional referrers, and recruiters. Architected end-to-end modern authentication flows using OAuth2 SSO (Google/LinkedIn), JWT stateless sessions with secure refresh token rotation, and fine-grained RBAC for API access protection. Designed a fully serverless AWS backend leveraging DynamoDB for scalable NoSQL persistence, S3 for file and resume storage, SES for email delivery, SNS for SMS notifications, and SQS/EventBridge for asynchronous workflows with SLA and expiry automation. Integrated AI-powered fraud detection, multi-factor OTP authentication, rate limiting, and company domain validation to ensure high security and anti-abuse protection. Implement...

    $1911 Average bid
    $1911 平均报价
    25 个竞标

    ...have in mind are: • Mini-games – fast-paced sessions that players can jump into from a central menu • Custom plugins – original code, not just public downloads, to handle unique mechanics and economy hooks • Hub lobby – a polished spawn area that routes players smoothly to every game mode That means writing or adapting plugins (Java/Spigot, Paper, or another framework you recommend), configuring permissions, worlds and databases, and stress-testing the setup so it performs well with a healthy player load. Deliverables 1. Fully configured Minecraft game server, ready for deployment and improvements with the option to configure everything. 2. Source code for every custom plugin with brief inline documentation 3. Hub ...

    $266 / hr Average bid
    $266 / hr 平均报价
    28 个竞标

    My React front-end talks to a Spring Boot (Java) back-end that lives on a VPS. The feature set is ready, yet three areas keep breaking: database interactions, several API endpoints, and the authentication flow. I have already combed through the server logs for stack traces, but the root causes are still hiding. I need someone who can jump into the existing repository, reproduce the problems locally or directly on the VPS, and deliver clean, well-documented fixes. You may rely on any familiar tools—IntelliJ, Maven, Postman, Docker, TestContainers—as long as the final result is a stable build with all tests passing and no regressions on the React side. Deliverables • Updated Spring Boot codebase with functioning database, API and auth logic • Concise change l...

    $204 / hr Average bid
    $204 / hr 平均报价
    64 个竞标

    I’m looking for a seasoned cybersecurity professional who can carry out a full-scale penetration test against my public-facing web application. My priority is threat assessment and mitigation, so the exercise must simulate real-world attack scenarios, uncover exploitable weaknesses, and give me a clear path to harden the platform. Scope You will conduct a comprehensive, OWASP-aligned assessment that includes manual exploitation techniques in addition to automated scans. I expect you to explore authentication, authorization, session management, input validation, business logic, and any server-side misconfigurations. Google platform for email/domain management and primarily cloud based tools. Tool choice is up to you—Burp Suite, OWASP ZAP, Kali Linux utilities, Metaspl...

    $164 / hr Average bid
    $164 / hr 平均报价
    69 个竞标

    Project Brief – Custom LoRa Wireless Button Trigger (USB Keyboard Device) Project Overview I am looking for an experienced embedded systems / hardware developer to design and build a custom wireless trigger system using LoRa communication. The system consists of: Handheld Transmitter (with button) USB Receiver (connected to a computer) When the button on the transmitter is pressed, the receiver should emulate a USB keyboard and send an ENTER key press to the connected computer. The device must be reliable and suitable for frequent use, therefore rugged connectors and proper enclosures are required. System Architecture The system will consist of two hardware devices. Wireless Range: At least 300-500 Meters Indoor. 1. Transmitter (Handheld Remote) A compact handheld remot...

    $2303 Average bid
    $2303 平均报价
    19 个竞标

    ...Compatibility: Designed for "Sonic Pop" style female sockets (standard vacuum-seal flag connectors). 3. Component & Hardware Details * Mounting the Poppers: The "Sonic Pop" female sockets usually come with a small plastic "stem" designed for a belt. For this machine, the builder will need to either: * Direct Bolt: Drill a hole through the wheel and use a bolt/washer through the back of the socket. * Bracket Mount: Use small "L" brackets to keep the sockets facing outward horizontally. * Drive System: High-torque 12V/24V DC Gearmotor. Note: Increasing to 8 flags adds weight and pull-drag; a motor with at least 80 kg-cm of torque is recommended. * Safety: The wheel must be "soft-edged" (padded with foam) to prevent inju...

    $3854 Average bid
    $3854 平均报价
    31 个竞标

    ...system for building enterprise admin interfaces and dashboards. It reflects the project’s goal of creating a low-code platform that enables engineers to rapidly develop internal tools with minimal manual coding. Dasopia emphasizes efficiency, scalability, and flexibility, allowing seamless integration with databases and APIs, reusable components, and customizable interfaces. By simplifying complex development tasks, the system reduces time, effort, and cost, while ensuring a user-friendly and maintainable environment. In essence, Dasopia embodies an ideal solution for rapid, reliable, and efficient construction of enterprise admin panels and dashboard PROBLEM STATEMENT “Low-Code Systems for Rapid Construction of Enterprise Admin Interfaces” ABSTRACTION ...

    $783 Average bid
    $783 平均报价
    11 个竞标

    ...system for building enterprise admin interfaces and dashboards. It reflects the project’s goal of creating a low-code platform that enables engineers to rapidly develop internal tools with minimal manual coding. Dasopia emphasizes efficiency, scalability, and flexibility, allowing seamless integration with databases and APIs, reusable components, and customizable interfaces. By simplifying complex development tasks, the system reduces time, effort, and cost, while ensuring a user-friendly and maintainable environment. In essence, Dasopia embodies an ideal solution for rapid, reliable, and efficient construction of enterprise admin panels and dashboard PROBLEM STATEMENT “Low-Code Systems for Rapid Construction of Enterprise Admin Interfaces” ABSTRACTION ...

    $94 Average bid
    $94 平均报价
    8 个竞标

    I maintain several live PHP sites built on mixed stacks—some plain-vanilla procedural code, others leaning on modern MVC frameworks. Each project needs a different touch: tidying legacy scripts, extending modules with fresh functionality, and occasionally building small stand-alone add-ons that plug into the existing systems without breaking what is already in production. For every task I will supply the current repository, database dump, and a concise change log; you review, estimate, and then push well-commented, PSR-compliant code back through Git. I expect defensive programming, clear commit history, and quick turn-around on minor follow-up tweaks once the work is live. If you are comfortable hopping between vanilla PHP, a couple of older CodeIgniter/La...

    $172 Average bid
    $172 平均报价
    25 个竞标