Full-Stack Dev/QA Analyst for App Testing

@asifalimzd

FULL STACK QA Hi there, I can handle complete web and mobile application testing from both QA and technical perspectives, including UI, APIs, authentication, permissions, database behavior, responsive issues and end-to-end user flows. I can reproduce and document bugs with clear steps, screenshots/recordings, inspect console and network errors to identify likely causes, and retest fixes properly. I have an experienced full-stack team familiar with React, JavaScript/TypeScript, Supabase, PWAs, APIs and SaaS platforms, with reliable communication and regular progress updates. Could you share the first application and test environment so I can review the setup and start with the initial QA cycle? Kindly send me a message to discuss more or directly award me. Thank you!

@ZohaibRoy

⭐⭐⭐⭐⭐ Full-Stack Developer & QA Tester for Web & Mobile App Testing ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project needs and see you are looking for a full-stack developer with strong QA skills. You don’t need to look any further; Zohaib is here to help you! My team has successfully completed 50+ similar projects for full-stack development and testing. I will perform thorough testing on both the front end and back end, ensuring every detail is covered. ➡️ Why Me? I can easily do your full-stack development and QA testing as I have 5 years of experience in web and mobile application testing, including bug identification, user flow testing, and API checks. My expertise covers UI testing, database interactions, and authentication processes. I also have a strong grip on React, Supabase, and JavaScript/TypeScript, ensuring a comprehensive approach to your project. ➡️ Let's have a quick chat to discuss your project in detail. I can provide samples of my previous work, showcasing my capabilities. Looking forward to our conversation! ➡️ Skills & Experience: ✅ Full-Stack Development ✅ QA Testing ✅ Bug Identification ✅ User Flow Testing ✅ API Testing ✅ Database Testing ✅ Responsive Design Testing ✅ Authentication Testing ✅ Documentation ✅ Communication Skills ✅ Attention to Detail ✅ Time Management Waiting for your response! Best Regards, Zohaib

@SBITServices

Hi there, I am a seasoned full-stack developer with extensive experience in QA testing for web and mobile applications. With a keen eye for detail and a comprehensive understanding of front-end and back-end development, I can efficiently identify and resolve technical issues related to UI, application logic, APIs, databases, authentication, and more. My proficiency in React, JavaScript/TypeScript, and API integrations, combined with a strong focus on communication and reliability, makes me an ideal candidate for ongoing testing projects. I have a track record of effectively diagnosing complex bugs and ensuring timely delivery of high-quality results. Let's collaborate to ensure seamless user experiences and robust application performance. Looking forward to potentially working together. FULL STACK QA

@installerpoint

FULL STACK QA Hello, I can provide technical application testing across frontend flows, APIs, authentication, permissions, database behavior, responsive interfaces, and mobile scenarios. I will document reproducible steps, expected versus actual results, evidence, likely root causes, and retest completed fixes. My strongest focus is JavaScript/TypeScript, React, API validation, browser console and network inspection, Supabase-style backends, and SaaS workflows. I value dependable updates, clear communication, and structured regression coverage for ongoing releases. I can align my working hours, timezone, response expectations, and hourly rate with your project requirements. Check out my portfolio here:- https://www.freelancer.com/u/installerpoint Best Regards, Muhammad Adeel

@naminghn

FULL STACK QA I can help with the comprehensive testing needed for your web and mobile applications. With strong full-stack development experience, I’ll rigorously examine both the front-end and back-end functionalities, looking for crucial areas such as user permissions and API behavior. I have a keen eye for detail, so I can thoroughly document bugs and provide clear insights into expected versus actual behaviors. Given my familiarity with technologies like React and my ability to diagnose complex issues, I’ll ensure your apps perform to their fullest potential. My normal working hours are from 9 AM to 5 PM UTC, with a response time usually within an hour. I'm excited about the potential for ongoing collaboration as you release new features and updates. Regards, Ali

@Jennycreation

Hello Sir, I have already worked on similar types of website and software development projects and I am confident that I can successfully handle your project. I am a full-time freelancer with **17+ years of experience** in web development, software development, automation, and API integrations. My expertise includes: * Android app development * ASP.NET C# web and software development * Python automation and web scraping (Amazon, Instagram, Facebook, Google Maps, LinkedIn, Telegram, and other custom scraping solutions) * JavaScript, jQuery, AJAX, Bootstrap, HTML5 * Microsoft SQL Server database development * Payment gateway integration * SMS, Email, Banking, Financial, and Insurance API integration * Custom automation bots and workflow automation software I focus on delivering **high-quality, scalable, and reliable solutions** with clean code and long-term support. Please contact me in private chat so we can discuss your requirements in detail. I can also show you a **demo of similar projects** I have completed. Looking forward to working with you. Thanks & Regards

@denisSolution

FULL STACK QA Hi, I'm Denis, a full-stack developer with several years of experience building and testing web and mobile applications. I've worked extensively with React frontends, backend APIs, databases, and authentication systems—giving me the perspective to quickly identify whether issues live in the UI, application logic, or backend infrastructure. I test like a developer, not just a checklist follower. That means inspecting network requests, checking console errors, understanding permission flows, and reproducing issues consistently so they're actually fixable. I've tested production applications where I needed to understand the full request-response cycle, validate database state, and distinguish between frontend rendering issues and API problems. I'm comfortable with React, JavaScript, TypeScript, and testing across web and mobile platforms, including Supabase-like systems and role-based permissions. My approach is straightforward: I'll start by understanding your application architecture, then work through user flows systematically—testing both happy paths and edge cases. When I find issues, I'll document them clearly with steps to reproduce, screenshots, and root cause assessment, then retest fixes to confirm they work. I'm reliable and dependable. I respond consistently during working hours, flag blockers immediately, and give realistic timelines. I work in UTC+1 timezone with typical response time under 2 hours. I can start right away. Let's discuss the det

@bcosley

Hi, I’ve done end-to-end QA for React and Node/Supabase apps, focusing on web and mobile flows and root-cause identification across UI, API, and data. Execution approach: I’d start by validating the main paths in staging, reproduce with real devices, capture steps, logs, and screenshots, then push concise repros for fixes and re-run targeted regressions. One technical risk / key challenge: intermittent auth tokens and race conditions across services. Two clarification questions: What are the top 3 user journeys to lock in first, and what are the acceptance criteria for production versus staging bugs? Who owns test data and environments, and how should flaky data be handled in nightly runs? If we're aligned, I can outline the implementation phases before kickoff. Best regards, Brandon

@temoberishvili

I see you're looking for a full-stack dev and QA analyst for web and mobile app testing. Your main goal seems to be ensuring a seamless user experience by thoroughly testing your apps across platforms. I noticed you need skills in JavaScript, mobile app development, and API testing. It would be great to clarify the specific features or functionalities you're most concerned about during testing. Understanding your testing framework or any existing tools you're using would also help align our approach. To minimize risk, I suggest starting with a detailed test plan, covering both manual and automated testing phases. This way, we can ensure all critical paths are tested before moving on to user acceptance testing. I've worked on projects like a regional tutoring platform, a local marketplace app, and an internal business tool, which have all strengthened my understanding of both development and QA processes. Looking forward to your thoughts!

@PINESCRIPTERR

FULL STACK QA Hi, I can handle full-stack QA across web and mobile applications, testing complete user flows while investigating issues at the UI, API, authentication, permissions, database, and integration levels. I’ll use browser DevTools, network inspection, logs, and API/database checks to reproduce issues, identify likely root causes, document clear evidence, and retest fixes across responsive and mobile environments. 1. Which application stack should I prioritize first—React/Supabase, PWA, native mobile, or another stack? 2. Will I have access to staging environments, test accounts, API documentation, and relevant database/logging tools? 3. How are bugs currently tracked, and do you have an existing severity/priority system for QA findings? Regards, Houssame

@dvcontact

Hello Sir, Would you like me to create a demo of my testing strategy tailored to your applications before making any commitment? With my extensive full-stack development experience and meticulous QA/testing skills, I will not only identify bugs but also uncover the root causes of issues ranging from UI to API behavior. Let's discuss this further so I can provide a detailed plan and showcase how my expertise can ensure your applications are performing at their best. Regards, Smith

@toriquldev123

FULL STACK QA Dear Client, I’m Md Toriqul Islam, an experienced full-stack developer with 10+ years of experience in development, debugging, API testing, and QA. I have a few questions: 1. Which app should we test first? 2. Do you provide staging credentials? 3. What test cases already exist? I understand you need technical QA covering UI, APIs, databases, authentication, permissions, responsive behavior, integrations, bug reproduction, fix verification, and clear progress reporting. My strengths include React, JavaScript, REST APIs, SQL, Supabase, mobile apps, debugging, browser network inspection, and end-to-end testing. I can provide reliable communication, detailed reports, and consistent testing throughout ongoing releases. Best regards, Md Toriqul Islam

@itswahabahmad

FULL STACK QA: As a seasoned game developer, my expertise extends well beyond creating captivating gaming experiences. My versatile skills as a full-stack Unity and Unreal Engine developer fully align with your needs for proficiently testing and identifying bugs in your applications. Having dealt with complex in-game mechanics, I understand the intricacies of back-end logics, API integrations, and database behavior, making me efficient in discerning UI-related issues from other technical causes. My meticulous attention to detail in gameplay system design translates smoothly into comprehensive application testing. I not only recognize bugs but also emphasize documenting the precise steps to reproduce them consistently - aiding quicker resolution of issues. Moreover, my knack for troubleshooting technical errors by inspecting browser consoles and network errors will prove invaluable while dealing with your web and mobile apps.

@mughiraaa

hi, i can help build your consumer app with React Native, Expo and TypeScript, including secure image uploads, personalized media API integration, saved results, sharing and RevenueCat subscriptions and credits. i’ve worked on similar mobile apps involving API integrations, async processing, user accounts and subscription flows, and can take the project from the existing prototype through testing and App Store and Google Play release. i’m also comfortable starting with the paid technical task. i can review the prototype, suggest a clean architecture and provide a practical implementation plan before the main development starts. let’s have a quick meeting to go through the prototype and technical requirements, and i can also share the relevant apps and discovery task estimate.

@khurshid040462

FULL STACK QA Hello, I can provide structured testing across web and mobile applications, covering complete user flows, responsive behavior, APIs, authentication, roles, permissions, database interactions, and integrations. My approach combines exploratory testing with browser console and network inspection, clear reproduction steps, evidence, expected-versus-actual results, and retesting after fixes. I am strongest with JavaScript/TypeScript ecosystems, React-based interfaces, REST APIs, Supabase-style backends, authentication, and SaaS workflows. I communicate consistently during agreed hours, report blockers promptly, and provide regular progress updates. I can also document difficult defects by tracing symptoms from the UI through requests, responses, permissions, and persisted data. I’m interested in becoming a dependable long-term QA partner for your applications. Regards

@Tanmoy236

FULL STACK QA. I can be your go-to application tester. With 9+ years and 400+ completed projects, I test both front-end and back-end, so bugs get traced to UI, APIs, database, auth, or permissions—not just reported. I'll test user flows end-to-end, reproduce bugs consistently, document steps with screenshots, compare expected vs actual, and identify likely sources. I'm strong in React, Supabase, JavaScript/TypeScript, APIs, and SaaS, and I inspect console/network errors. You get reliable communication, realistic deadlines, and retesting after fixes. What's your current tech stack for the first app, and what timezone/working hours do you need? Let's chat to align on scope and start testing.

@AndrewJSMAN

FULL STACK QA I've built and tested React/Supabase/TypeScript PWAs and native mobile apps before, so this is right in my wheelhouse. I'll audit the apps end-to-end—front-end flows, back-end APIs, database interactions, authentication, and mobile responsiveness—then document bugs with screenshots, reproduction steps, and root-cause analysis. For complex issues, I'll inspect browser/network logs, debug API responses, and validate fixes. I'll track progress daily and adjust deadlines proactively. My working hours are 9 AM–5 PM EST, with a 1-hour response time during that window. I can start immediately. Thanks, Andrii.

@msaqibimran

Hi, I can efficiently test your web and mobile applications with a focus on both frontend and backend interactions. With my full-stack experience, I can identify issues quickly, whether they stem from UI, APIs, or backend logic. I estimate that a thorough testing phase would take around 1-2 weeks, depending on the complexity of each application. Could you clarify the number of applications needing testing and any specific areas of concern you have identified? Understanding your primary goals will help me tailor my approach effectively. I’ll perform end-to-end testing, documenting any bugs, reproducing them reliably, and suggesting possible technical sources for issues. My background includes working with React and various API integrations, which should align well with your needs. I'm looking forward to discussing this further. Best regards, Mohammad

@longngoc2307

Perfect Match "FULL STACK QA" — find the real cause behind bugs across UI, APIs, auth, permissions, and database behavior. I’ll test complete user flows while checking browser logs, network calls, API responses, and database behavior to separate UI bugs from backend issues. I’ll document clear reproduction steps, expected vs actual results, then retest fixes. Which apps should be tested first, and do you provide test accounts for each user role? Looking forward to work with you