The ultimate guide to hiring a web developer in 2021
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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:
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!
De 18,662 opiniones, los clientes califican nuestro API Testing Experts 4.9 de un total de 5 estrellas.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:
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!
De 18,662 opiniones, los clientes califican nuestro API Testing Experts 4.9 de un total de 5 estrellas.I need a developer who can jump straight into the code-base and tighten the connection between the site and our central PostgreSQL/MySQL database. The immediate focus is to: • Debug the login-time and redirect-time ad settings that occasionally mis-fire. • Wire up banner, video and interstitial ads so they display and track correctly. • Complete the remaining API endpoints that link the website to the central database, then write clear, developer-friendly documentation for them. • Refactor the existing Java and PHP code so the new API calls, wallet functions, recharge/payment gateway, subscription package management, CRM member tools, and illegal short-link controls run smoothly from the same backend interface. To succeed you’ll need solid PostgreSQL an...
We need a legitimate, non-production Ironclad demo or sandbox account for API integration testing. Note: we need you to make an account, we cant provide our own account The environment must have the API add-on enabled and support both: - OAuth 2.0 using a client ID and client secret. - A supported API key/access token. If this is available only through Ironclad Clickwrap, provide the separate Clickwrap test environment and credentials. Deliverables - Demo/sandbox login URL, username and password. - Transferable email account and login credentials, if used. - Tenant URL and environment type. - OAuth client ID and client secret. - Our supplied redirect URL configured in the OAuth application. - Authorization Code grant enabled. - Client Credentials grant enabled, if supported. - Active ...
I need a seasoned QA tester to put my consumer-facing app through its paces on both iOS and Android. The build is stable, but before launch I want fresh eyes on the experience and solid evidence that everything works as intended. Your mandate is three-fold: • Functional testing – confirm every screen, button, push notification, and in-app purchase behaves exactly as designed. • Usability testing – highlight friction points, confusing flows, or accessibility gaps that could frustrate users. • Performance testing – watch for memory spikes, crashes, and slow load times, then document reproducible steps so my dev team can act fast. I’ll provide TestFlight and Play Store beta links, API keys where needed, plus a checklist of known edge cases; you&r...
I need a comprehensive vulnerability assessment and penetration test performed on my production web application. Because I can grant limited internal knowledge—such as architecture diagrams, sample credentials, and API documentation—I would like the engagement run as a grey box exercise rather than pure black-box reconnaissance. 1 External VA/PT - 4 public IPv4/region - Full manual validation through WAF/security stack 2 Internal VA/PT - 10 segments / 250 live IPs - Credentialed + non-credentialed testing 3 Web Application — Virtual Trust - 1 app / 20 modules / 10 roles - Grey/white box + targeted production validation 4 Web Application — CrimsonLogic - 1 app / 20 modules / 10 roles 5 API Security 50 endpoints base - Full OWASP API Top 10 + business logic 7 Confi...
A Software QA Engineer is actively seeking a job opportunity in Dubai and is open to relocation. The professional has strong experience in: Manual and automated testing JIRA, Confluence, Bitbucket SQL, PHP, HTML debugging Test realms, SSL, JMeter, and API testing Profile Highlights: 4+ years of QA experience Skilled in bug tracking, test case design, and quality assurance workflows Flexible to join immediately and relocate to Dubai Looking For: Recruitment consultants or professionals who can connect them with genuine employers in Dubai Guidance on CV optimization for the UAE market Networking support or introductions to hiring managers This posting is intended to find recruitment assistance or job placement support for a qualified QA engineer ready to move to Dubai. Importan...
Key Responsibilities: Design and execute performance, load, stress, and scalability tests. Develop and maintain performance test scripts using JMeter, LoadRunner, or K6. Analyze application performance and identify bottlenecks. Monitor CPU, memory, database, network, and application metrics using tools such as AppDynamics, Dynatrace, Grafana, or similar. Prepare performance test reports and provide recommendations for optimization. Work closely with developers, QA, DevOps, and infrastructure teams to resolve performance issues. Must-Have Skills: Strong hands-on experience in Performance Testing. Good knowledge of JMeter / LoadRunner / K6. Understanding of performance engineering concepts, workload modeling, and SLA analysis. Experience with APIs, SQL, and basic scripting/programming. Kn...
I have a consumer-facing web application that needs a fresh, detail-orientated review. To make sure we work well together, I’ll begin with a paid one-hour assignment: a short video call on Freelancer. I’ll share the site URL and two known issues. During that single hour you’ll reproduce both problems and record crystal-clear, step-by-step documentation—screenshots or a brief screencast, environment details, and an “expected vs. actual” summary. If you succeed, the project expands to roughly 20 hours of manual testing per week for the next two to three months. The app is not an e-commerce store; it behaves like a typical SaaS web application, so you’ll be exploring navigation, forms, permissions, and edge-case behaviour. I expect testing on at l...
Looking for an experienced developer/security tester to analyze an OTP-based login system on a website that I am authorized to test. I need someone who can review the website’s OTP authentication workflow, identify security weaknesses, and suggest a secure way to streamline the authorized login process. Requirements: OTP login workflow analysis Website/API security testing Authentication flow review Security vulnerability assessment Clear report of findings Only authorized security testing. No unauthorized access or credential bypass.
# QA Tester Based in Peru – Payment Platform Testing We are looking for a **freelance QA tester currently based in Peru** to test and validate the user experience and functionality of payment features on our platform. This is a **short-term, remote software testing project** with predefined test cases and clear deliverables. ## Scope of Work The selected freelancer will: * Execute predefined QA test cases for payment functionality * Test pay-in and payout user flows from a QA perspective * Validate the end-to-end user experience * Verify whether each test case behaves as expected * Identify and document bugs, errors, or unexpected behavior * Provide screenshots or screen recordings where required * Submit structured test results and observations * Retest specific scenarios after...
The task is to run focused functional testing on my Flutter-based Android application, zeroing in on the payment‐processing flow that handles bank transfers. I need complete confidence that every step—from entering account details to final confirmation—works exactly as intended under real-world conditions. Scope of work • Draft clear test cases that cover all bank-transfer scenarios (successful transactions, declined attempts, network drops, retries, and edge limits). • Execute those cases across the major Android OS versions and common screen sizes. • Log every defect with steps to reproduce, expected vs. actual results, and supporting screenshots or screen recordings. • Verify fixes as they are delivered until the flow is entirely stable. Environ...
I need a seasoned performance-testing specialist to run a focused audit on ShowManager.pro. The single priority is load time: I want clear, data-backed insight into how quickly each page renders for users and where the slow-downs occur. What I expect you to do • Profile full page load time across key user flows (landing page, login, dashboard, event setup, reporting). • Simulate realistic traffic with tools such as JMeter, k6, or Gatling and capture waterfall metrics with Lighthouse or WebPageTest. • Isolate front-end, API, and third-party bottlenecks, documenting TTFB, first contentful paint, and fully loaded milestones. • Provide a concise report that explains findings, prioritises fixes by impact, and gives actionable optimisation recommendations. Accepta...
Security Audit – Website & iOS/Android Apps We are looking for a developer/security specialist to perform a 5-day security review and manual testing of our website, backend and iOS/Android apps. The work includes: * Review and test Stripe integration, API keys, webhooks, payments, refunds, chargebacks, MobilePay and Apple Pay. * Review GDPR/security of personal data, access control, encryption, storage and deletion. * Manual review based on OWASP Top 10, including SQL Injection, XSS, CSRF, authentication, authorization and exposed API endpoints. * Test iOS and Android apps, including installation, login, backend communication, payments and data. * Review server/app logs, monitoring, PHP and other system versions. * Identify and report security risks and provide recommendations...
I need an AI-driven security harness whose single focus is vulnerability scanning. The agent should automatically inspect my codebase, exposed and internal APIs, as well as the cloud configuration that supports them, then flag weaknesses with clear, actionable findings. Here is what matters most to me: • A self-contained module or set of scripts that can be dropped into an existing CI/CD pipeline and triggered on every commit or on demand. • AI-assisted detection that goes beyond simple signature matching—think pattern recognition and contextual reasoning to uncover insecure coding practices, misconfigured permissions, or outdated components. • Coverage across three layers: the repository itself (static code analysis), live or staged endpoints (API interrogation...
If you want to stay competitive in 2021, you need a high quality website. Learn how to hire the best possible web developer for your business fast.
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