API Testing is the process of testing Application Programming Interfaces (APIs) to ensure that they are working correctly and achieving the expected results. APIs are integral for any software applications to communicate with each other, as they provide data exchange and flow of information between different applications. A qualified API Testing Expert can ensure that the communication between applications is secure, and that they meet the performance requirements of the end user.

API Testing Experts make sure to think like an “attacker” while performing API operations, while they expand the boundaries of API inputs to test. This involves traditional testing methods such as boundary value analysis, API workflow validations, boundary conditions and security patch testing. In addition their skills involve overseeing the debugging of API logical codes, assisting in 4GL programming related tools, creating automated API tests & scripts as well as load and stress test API process flows.

Here’s some projects that our API Testing Experts has made real:

  • Creating automated tests for backend services
  • Identifying security loop holes in APIs
  • Debugging API logic codes and component layers
  • Developing customized load tests for optimal performance
  • Integrating third party services via APIs

Overall, a qualified API Testing Expert can provide comprehensive and reliable solution for your application software. These experts can fine tune your application software to ensure that it meets all system requirements and user demands efficiently. By hiring an experienced freelancer from Freelancer.com you can secure superior performance of your application software maintained in perfect condition. We invite you to post your own project on Freelancer.com today and get ready to hire an expert API Tester!

A partir das avaliações de 16,506, os clientes avaliam nosso API Testing Experts 4.92 de 5 estrelas.
Contratar API Testing Experts

API Testing is the process of testing Application Programming Interfaces (APIs) to ensure that they are working correctly and achieving the expected results. APIs are integral for any software applications to communicate with each other, as they provide data exchange and flow of information between different applications. A qualified API Testing Expert can ensure that the communication between applications is secure, and that they meet the performance requirements of the end user.

API Testing Experts make sure to think like an “attacker” while performing API operations, while they expand the boundaries of API inputs to test. This involves traditional testing methods such as boundary value analysis, API workflow validations, boundary conditions and security patch testing. In addition their skills involve overseeing the debugging of API logical codes, assisting in 4GL programming related tools, creating automated API tests & scripts as well as load and stress test API process flows.

Here’s some projects that our API Testing Experts has made real:

  • Creating automated tests for backend services
  • Identifying security loop holes in APIs
  • Debugging API logic codes and component layers
  • Developing customized load tests for optimal performance
  • Integrating third party services via APIs

Overall, a qualified API Testing Expert can provide comprehensive and reliable solution for your application software. These experts can fine tune your application software to ensure that it meets all system requirements and user demands efficiently. By hiring an experienced freelancer from Freelancer.com you can secure superior performance of your application software maintained in perfect condition. We invite you to post your own project on Freelancer.com today and get ready to hire an expert API Tester!

A partir das avaliações de 16,506, os clientes avaliam nosso API Testing Experts 4.92 de 5 estrelas.
Contratar API Testing Experts

Filtro

Minhas pesquisas recentes
Filtrar por:
Orçamento
para
para
para
Tipo
Habilidades
Idiomas
    Estado do Trabalho
    15 trabalhos encontrados

    About the project We've built , a SaaS platform that acts as a middleware layer between users and the Anthropic Claude API. Users provide their own Claude API key, and our backend processes requests through proprietary infrastructure designed to reduce token consumption. We're pre-launch and need thorough third-party QA before opening to paying customers. ***PLEASE GO THROUGH ENTIRE SIGN UP PROCESS A - Z*** What we need tested 1. Functional testing (all user flows) Signup, login, password reset, session handling API key submission, encryption at rest, and deletion flows Credit purchase flow across all three tiers ($10, $25, $50) and custom amounts End-to-end request flow: user prompt → our backend → Claude API → response Streaming, tool use, and vision request h...

    €12600 Average bid
    Destacado
    €12600 Média
    80 ofertas

    The system must include a full Admin Panel to manage markups, currencies, exchange rates, providers, and manual hotel contract rates without requiring any code changes. The goal is to build a centralized Hotel Search & Pricing Engine server that acts as the core system for multiple channels: WhatsApp via (AI Agent) OTA website (web platform) Future mobile application This server does not handle bookings or payments. Its only responsibility is real-time hotel search, multi-provider price comparison, markup calculation, currency conversion, and structured responses per channel. --- Single API Entry Point POST /searchHotels All channels use this single endpoint. --- Unified Request Format { "source": "respond", "city": "Dubai", "...

    €249 Average bid
    €249 Média
    40 ofertas

    The system must include a full Admin Panel to manage markups, currencies, exchange rates, providers, and manual hotel contract rates without requiring any code changes. The goal is to build a centralized Hotel Search & Pricing Engine server that acts as the core system for multiple channels: WhatsApp via (AI Agent) OTA website (web platform) Future mobile application This server does not handle bookings or payments. Its only responsibility is real-time hotel search, multi-provider price comparison, markup calculation, currency conversion, and structured responses per channel. --- Single API Entry Point POST /searchHotels All channels use this single endpoint. --- Unified Request Format { "source": "respond", "city": "Dubai", "...

    €17 Average bid
    €17 Média
    8 ofertas
    Niger-based API Tester Needed
    6 dias left
    Verificado

    Job Description:
 We’re looking for a skilled and detail-oriented QA tester based in Niger to help us test the API functionality of our payin and payout systems. You will play a key role in validating the reliability and accuracy of our payment processes, ensuring everything runs smoothly from start to finish. Scope of Work: * Conduct end-to-end testing of API-based payin and payout transactions * Monitor and record the full transaction process, including responses and behavior at each stage * Identify and report bugs or unexpected results with clear documentation * Work closely with developers to replicate issues and verify fixes * Offer suggestions to improve testing coverage and process reliability Requirements: * Must be physically located in Niger (for regional payment flow t...

    €14 Average bid
    €14 Média
    22 ofertas

    Job Description:
 We’re looking for a skilled and detail-oriented QA tester based in South Africa to help us test the API functionality of our payin and payout systems. You will play a key role in validating the reliability and accuracy of our payment processes, ensuring everything runs smoothly from start to finish. Scope of Work: * Conduct end-to-end testing of API-based payin and payout transactions * Monitor and record the full transaction process, including responses and behavior at each stage * Identify and report bugs or unexpected results with clear documentation * Work closely with developers to replicate issues and verify fixes * Offer suggestions to improve testing coverage and process reliability Requirements: * Must be physically located in South Africa (for regional ...

    €14 Average bid
    €14 Média
    20 ofertas
    API Testing Tool Video Reviews
    5 dias left
    Verificado

    I want to showcase a new, developer-centric API testing platform through a small series of videos— I’ll provide: • Full demo to the tool and what ever information you need. Bonus if you have: Experience with developer tools (Postman, Insomnia, Hoppscotch, etc.) Audience interested in backend, APIs, or web development If the videos perform well, there’s strong potential for long-term collaboration and more projects. Looking forward to working with a passionate tech creator!

    €9 Average bid
    €9 Média
    18 ofertas
    End-to-End SaaS QA Audit
    5 dias left
    Verificado

    I’m ready to give you full access to our live, multi-tenant transportation SaaS, and I need a complete quality audit finished as soon as possible—no later than 20 business days after the NDA is signed. What I expect you to cover • Functional depth first: 13 individual modules (booking, dispatch, driver tracking, pricing, invoicing, SMS/email marketing, and the rest) must be exercised in real-world workflows for all six user roles. • Security with special focus on tenant-to-tenant isolation. Authentication, authorization, injection vectors, and PCI areas still need attention, but isolation is the non-negotiable baseline. • Load and performance baselines under realistic concurrency. • Usability feedback from the perspective of each role. • Cr...

    €412 Average bid
    €412 Média
    56 ofertas

    我需要你针对一款 Android 手机应用进行全面测试,重点放在以下三项核心功能: - 登录/注册流程 - 支付系统(含支付成功与失败场景) - 通知功能(前台、后台与推送到锁屏) 测试场景 1. 常见机型与操作系统版本:请覆盖主流 Android 版本,记录兼容性差异。 2. 网络环境:4G/5G、Wi-Fi 与弱网情况下的表现。 3. 边缘情况:连点、切后台、权限被拒绝、电量不足等极端操作。 交付内容 • 一份结构化的缺陷报告(含可复现步骤、截图或录屏、机型与系统信息)。 • 功能通过的用例列表及测试结果。 • 关键问题的初步复现分析与改进建议。 如果你拥有丰富的移动端 QA 经验,能熟练使用常见 bug 追踪工具(如 Jira、Bugly 或 TestRail),并且乐于提出改进思路,我期待与你合作。

    €13 - €21 / hr
    Secreto
    €13 - €21 / hr
    23 ofertas

    I need my client-facing web application put through a full round of manual testing. The goal is to surface every functional, usability, and cross-browser issue that might appear before launch. Scope • Browsers: Google Chrome, Mozilla Firefox, and Safari on the latest public releases for macOS and Windows. • Coverage depth: core workflows, edge-case inputs, responsive behaviour, error handling, and visual consistency. Deliverables 1. A test plan outlining scenarios, steps, and expected results. 2. Executed test cases with pass/fail status, supporting screenshots or screen recordings for any defect. 3. A consolidated defect log that categorises issues by severity and includes clear reproduction steps. 4. A brief summary report highlighting critical blockers, usability...

    €211 Average bid
    €211 Média
    53 ofertas

    I have a newly developed AI-powered document and identity verification platform that is ready for functional testing. The core focus of this testing will be validating the end-to-end workflow, including document upload, user authentication , data extraction, verification processes, and secure document retrieval. Users will be interacting with the system by uploading documents, completing identity verification steps, accessing restricted environments, and retrieving verified outputs. Your role is to design realistic test scenarios that reflect real-world use cases (e.g., visa applicants, students, compliance officers), execute them thoroughly, and ensure that each workflow behaves as expected. You will need to validate that: Documents are uploaded and processed correctly Identity verific...

    €255 Average bid
    €255 Média
    46 ofertas

    QA Manual Tester needed to check bugs for our site Vidthanks.com. Do Not contact us outside of Freelancer. Set up bugbug for test scenarios. Help us build a test plan and be our test contractor for a long term relationship. The site is in development and ready for some testing now. .To be short listed, you must start your bid with "PROJECT ID: QA55" Otherwise we assume you are a bot or you cant follow simple instructions.

    €255 Average bid
    €255 Média
    99 ofertas

    I need a skilled QA specialist to test, refine and deploy a web application. Requirements: - Test on Chrome and Safari - Perform functional, performance, and security testing Ideal Skills: - Experience with web app QA - Proficient in testing on multiple browsers - Strong background in functional, performance, and security testing - Familiar with deployment processes Looking for someone detail-oriented, with a track record of ensuring high-quality software.

    €207 Average bid
    €207 Média
    64 ofertas

    I need an experienced React developer to fix a critical iOS Safari bug in my production app. When Sheet and Dialog components from Radix UI are opened on physical iOS devices, all interactive elements require a double-tap to function properly. This issue only occurs on real iOS Safari, not in browser simulators. Requirements: • Strong experience with React and TypeScript • Deep knowledge of iOS Safari-specific issues and touch events • Experience with Radix UI components (Sheet, Dialog) • Familiarity with Tailwind CSS • Ability to test on actual iOS devices • Experience debugging touch/click event handling Deliverables: • Root cause analysis of the double-tap issue • Complete fix that works on real iOS Safari devices • Brief explanation of the...

    €8 / hr Average bid
    €8 / hr Média
    61 ofertas

    Job Description:
 We’re looking for a skilled and detail-oriented QA tester based in Tanzania to help us test the API functionality of our payin and payout systems. You will play a key role in validating the reliability and accuracy of our payment processes, ensuring everything runs smoothly from start to finish. Scope of Work: * Conduct end-to-end testing of API-based payin and payout transactions * Monitor and record the full transaction process, including responses and behavior at each stage * Identify and report bugs or unexpected results with clear documentation * Work closely with developers to replicate issues and verify fixes * Offer suggestions to improve testing coverage and process reliability Requirements: * Must be physically located in Tanzania (for regional payment ...

    €14 Average bid
    €14 Média
    18 ofertas

    Project Description: We are seeking a highly skilled and experienced cybersecurity professional to conduct a comprehensive Vulnerability Assessment and Penetration Test (VAPT) on our mobile application. The primary goal is to identify, assess, and report on security vulnerabilities within the mobile client and its associated backend APIs. The ideal candidate will have a proven track record in mobile security, follow industry-best practices (such as OWASP MASVS), and provide a detailed, actionable report. About the Application: Application Name: SecureApp Platform(s): iOS/Android Primary Function: An e-commerce platform for handmade goods Technology Stack (if known):React Native, Backend is Node.js Scope of Work: The VAPT should cover, but is not limited to, the following areas: 1. Mo...

    €973 Average bid
    €973 Média
    27 ofertas

    Artigos Recomendados Só para Você