Senior QA + Debugging Expert for Full Website Test & Fix Before Production Launch

@ZohaibRoy

⭐⭐⭐⭐⭐ Expert QA and Bug Fixing for Your Web Application ❇️ Hi My Friend, I hope you are doing well. I've reviewed your project requirements and see you are looking for a senior QA professional. You have no need to look any further; Zohaib is here to help you! My team has successfully completed 50+ similar projects for QA and bug fixing. I will create a detailed test plan, conduct thorough testing, and efficiently fix any issues found in your web application. ➡️ Why Me? I can easily handle your QA process and bug fixing as I have 5 years of experience in software testing, debugging, and development. My expertise includes functional testing, performance testing, and payment flow testing. Additionally, I have a strong grip on both Python and JavaScript, ensuring I can effectively address any issues in your codebase. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. Looking forward to discussing with you in chat! ➡️ Skills & Experience: ✅ QA Testing ✅ Bug Reporting ✅ Test Planning ✅ Functional Testing ✅ Debugging ✅ Python Development ✅ JavaScript Development ✅ Payment Integration Testing ✅ Cross-Browser Testing ✅ Database Testing ✅ Performance Testing ✅ Error Handling Waiting for your response! Best Regards, Zohaib

@Herculesz

Hi I can own the full pre-launch QA and bug-fixing cycle for your Python REST API, JavaScript frontend, PostgreSQL database, Linux staging environment, and Stripe checkout/webhook flows. I have handled similar QA plus development work on SaaS dashboards, authentication systems, role-based portals, and payment integrations where I tested issues and fixed them directly in the codebase. The main technical risk is that payment or authorization bugs can look fine in the UI while failing silently in backend API logic, database state, sessions, or Stripe webhook processing. I would solve this with a coverage checklist, role-based end-to-end testing, browser/device validation, log review, network/console inspection, and root-cause debugging. For Stripe, I would test successful payment, declined card, 3-D Secure, refunds, duplicate webhook events, failed webhook signatures, and backend event handling rather than relying only on the checkout success page. Each issue would be reported with reproduction steps, severity, environment details, screenshots or recordings, suspected cause, and priority. After confirmation, I would fix frontend and backend defects cleanly, improve validation/error handling where needed, commit changes clearly, and document what was wrong and what changed. I would also re-test every Critical and Major issue so the final report shows verified pass results before launch. Thanks, Hercules

@koolvishruth

I am Sr QA with 7 years of experience and having extensive experience in Python, Javascript, Manual and automation testing. I have worked with more than 122+ clients here. Let’s connect

@Aaleen110

I understand you need a senior QA expert to perform comprehensive testing and debugging of your Python/JavaScript web application, focusing on user registration, dashboard functionality, and Stripe payment integration before production launch. I recently identified and resolved over 50 critical bugs in a similar e-commerce platform's checkout flow, leading to a flawless launch. My approach will involve developing detailed test cases covering all critical paths within the registration, dashboard, and Stripe checkout/webhook logic. I'll utilize Pytest for backend API testing, Cypress for end-to-end frontend validation, and direct SQL queries against PostgreSQL for data integrity checks. Bugs will be meticulously documented with reproducible steps and code-level insights, followed by direct fixes in the Python and JavaScript codebase. Could you clarify the expected turnaround time for bug verification after fixes are deployed to the staging environment? Ready to start as soon as you confirm scope.

@alizain721

A common launch risk isn’t missing buttons — it’s missed state transitions and webhook edge cases that only appear under concurrent use or failed payment flows. My focus is finding those low-frequency failures and fixing their root causes so the launch doesn’t hinge on a single recovery path. Practical approach: I’ll start with a concise test plan covering auth, dashboard roles, and full Stripe flows for your sign-up -> checkout -> webhook lifecycle. I’ll run automated browser flows (Playwright/Cypress) plus targeted manual negative/boundary tests, capture console/network errors, and produce a prioritized bug report. After you approve the report I’ll fix issues in repo, add/strengthen validation and error handling, and re-test until all Critical/Major items pass. Suggested stack: keep your Python REST + JS front end and Postgres; use pytest + requests for backend tests, Playwright for E2E, Stripe CLI to replay webhooks, and GitHub issues (or Sheets) for structured reports. Commits will be small and descriptive with short post-fix notes. Maintenance/flex: I’ll add minimal unit/integration tests for each fixed bug to prevent regressions and leave clear rollback points. Similar work: on LootEdge I owned Stripe Connect flows, webhook replay/debugging, and fixed race conditions in payment state transitions before launch. I can start immediately; estimated 3–5 business days (≈30–40 hrs). Please share the staging URL and repo access — do you have CI hooks or a test branch you prefer fixes to land in?

@hareshfinadiya

Hi, I am Haresh, having 14+ years of experience in Software Testing Industry. - Having unique blend of knowledge in Quality Product Delivery, Processes Management, Functional testing, Integration and regression testing, load and Perfromance Testing which help me to take the Quality of the software to the next level. - Hands on experience on testing Desktop, Web Based, Mobile application and ERP based application. - Hands on experience on automation testing tools on selenium webdriver, jmeter, katalon studio, Appium, cypress, selenium with TestNG freamwork etc.. - Thorough understanding of Product Delivery Life Cycle, Software Testing Life Cycle and Software Development Life Cycle. - Experience in Well conversant with writing Test plan,Test Cases,Bug report, Release Note and Product Health Report. - Worked in various domains like Finance, Retail, Web Portals, Healthcare, ecommnerce, CMS, Eduction Portal, Life Insurance, ERP system etc. - I do have require mobile devices to test mobile view or applications like android and iOS applications. - I have hands on experience with Git, postman, MSSQL Server. Kindly review my profile and let me know you view over the same. Thanks, Haresh

@mykhaylob4

✋ Hi, there. I can perform a complete pre-launch QA audit and fix the issues directly in your Python and JavaScript codebase before production release. ✔️ I have experience handling both QA and development responsibilities on production web applications. I have worked on platforms involving authentication systems, dashboards, REST APIs, PostgreSQL databases, Stripe payments, and role-based permissions where I was responsible for identifying issues, tracing root causes, implementing fixes, and validating the final release. ✔️ My process starts with creating a structured test plan covering authentication, user workflows, dashboard functionality, permissions, payments, webhooks, API responses, validation, browser compatibility, mobile responsiveness, and edge cases. Every issue will be documented with reproduction steps, severity, screenshots, logs, and technical observations. ✔️ For Stripe testing, I will validate successful payments, failed cards, 3D Secure flows, refunds, duplicate submissions, webhook delivery, retry scenarios, and backend processing to ensure the database and application state remain consistent. After reporting, I will fix confirmed issues in both frontend and backend code, document root causes, and complete a full regression test. Please click the Chat button so we can review the staging environment, codebase structure, and launch timeline. Looking forward to working with you! Best regards, Mykhaylo

@dailytechworks

Hello, my name is Rudra Kumar, an experienced Senior QA Engineer and Scrum Master with a comfortable understanding of both Python and JavaScript codebases. I specialize in the meticulous testing of web applications, which crucially includes comprehensive debugging and fixing. Having worked on multiple SaaS platforms, e-commerce applications, and enterprise software in the past, I am well-versed in the areas important for your project—the likes of payment integration as well as webhooks. What sets me apart is my unique ability to test methodically like an engineer and then use that deep understanding to go into the codebase to address the issues I find. My bug reports are systematically structured, prioritized, and detailed—everything your team may need to efficiently fix the bugs. And my experience in analyzing root causes rather than just applying surface patches ensures sound long-term fixes. I propose providing you not just with quality assurance but with a holistic solution—the full testing coverage documented short plan at the start, a comprehensive bug report with severities and reproducible steps, clean-debugged code with explicit commits per fix, and ultimately—a final report ensuring everything is ready for launch. Let's ensure your application goes live smoothly and without major hiccups; choose me to own both your QA process and bug-fixing!

@techsty2014

Hi there, We will test and fix your Python/JS web app across all three critical areas: auth flows, dashboard CRUD, and Stripe checkout with webhook verification. For payment testing, we will trace each Stripe event from the front end through to your webhook handler, confirming the database state updates correctly for every scenario (success, decline, 3DS, refund). A couple of quick things to confirm: 1) Which issue tracker do you prefer for the bug report? 2) Are there specific user roles beyond admin and standard? The number quoted here is a starting estimate. The exact cost and timeline will be confirmed after we go through the full scope together. Looking forward to discussing further. Best regards, Faizan

@murtuza90

As a seasoned software engineer with a decade-long track record, I offer a unique blend of QA and debugging skills that seems tailored to your project's specific needs. I have an extensive background in testing and optimizing web applications, particularly those involving similar tech stacks as yours - Python backend, JavaScript frontend, plus databases. My approach involves conducting extremely meticulous testing, reviewing every nook and cranny to uncover even the most elusive bugs that might still lurk in your codebase. Having had my hands on various live projects of such complexity-levels; I am adept at efficiently planning each step of the process, from the test plan formulation to fixing what we find, thus ensuring all issues get addressed without any lingering effects. More than just finding the bugs, however, I focus on identifying their root causes and implementing clean solutions that eliminate not only a particular bug but broader classes of them. These are the qualities that have earned me a perfect satisfaction rate with each job I take up. Lastly, drawing on extensive leadership experience managing development teams and maintaining healthy collaborative relationships during the process; my communication skills remain clear and transparent throughout. This allows your whole team to stay on the same page regardless of their technical expertise. As for the billing plans: You can assure yourself that I work within whatever structure you deem suitable!

@ukokab

With over a decade of experience as a QA/testing master and web developer, I'm uniquely qualified for your Senior QA + Debugging Expert role. I understand the duality of having to not only ferret out bugs but also repair them within the codebase. In my many years, I've investigated countless flaws and built up a repertoire of effective fixes that go beyond surface patches—just as you require. You want to ensure your team can speak your whole app's language so they can tackle blockers head-on without struggling through the "what happened here!" In addition to scrutinizing every cranny of your web application, I'm comfortable reading and comprehending Python and JavaScript codebases. My robust skills in backend web development will be beneficial while debugging, as I wouldn't just speculate exteriors. Instead, I would locate the root causes and implement thorough fixes – even enhancing input validation for future-proofing. If hired, you can expect meticulously crafted directories recording critical process tests, structured bug reports with all necessary data, cleanly fixed codes with informative notes. Lastly, payment/checkout flows and working with webhooks are well within my wheelhouse - from understanding Stripe events to ensuring proper handling of all transactions. This comprehensive understanding will prove crucial in spotting any potential lurking issues and ensuring a smooth experience across devices

@carlosd178

Hello, As a result of a detailed review of your project requirements, I fully understand the scope and expectations. You need a senior professional who can both perform deep QA testing and independently fix confirmed issues across a Python, JavaScript, PostgreSQL web application before launch. I have experience handling similar pre-launch QA and debugging projects and I'm available to start your project right now. I bring deep expertise in Python, JavaScript, REST APIs, PostgreSQL, Software Testing, Website Testing, Quality Engineering, Stripe integrations, webhook debugging, Linux environments, and Web Application development with over 10 years of experience. One of the key challenges in projects like this is identifying root causes rather than applying temporary fixes. For Stripe testing, I verify successful payments, declined cards, 3D Secure flows, refunds, webhook delivery, event processing, duplicate event handling, and backend database consistency—not just frontend success states. I have a couple of quick questions. • Approximately how many active user roles and permission levels exist in the application? • Do you currently use any automated tests, CI/CD pipeline, or issue tracker for bug reporting? I would be glad to discuss further details and am ready to start immediately. Looking forward to hearing from you. Best regards, Carlos

@hoangvanp

Hello, I have carefully checked your requirements and understand that you need a senior QA and debugging expert to thoroughly test and fix issues in your web application before its production launch. With experience in testing and debugging complex web applications, I can ensure a methodical approach to testing critical user flows such as registration/authentication, user dashboard functionality, and payment integration using Python backend, JavaScript front-end, and PostgreSQL database. Since I have worked on similar projects, I can quickly handle both the QA process and bug-fixing with a production-focused approach. My experience includes testing payment/checkout flows, ensuring cross-browser compatibility, and thorough error checking. I can deliver: - Detailed test plan and coverage checklist - Structured QA bug report with severity levels - Fixed front-end and back-end code with clear commits - Final report on root causes, fixes, and re-test results I can start immediately and work within your timeline. Let's discuss the details via chat. Best regards, Hoang Van Phi

@rafaels170

Hello, this is exactly the type of pre-launch engagement where a combined QA engineer and developer adds the most value. I’ll start with a risk-based test plan, perform deep functional, negative, cross-browser, and Stripe webhook testing, then trace every confirmed issue to its root cause and fix it directly in the Python, JavaScript, or PostgreSQL layers. For payments, I validate the entire lifecycle including successful charges, declines, 3DS, refunds, webhook retries, and data consistency between Stripe and your database. Based on the final scope, I estimate 5–8 days and would appreciate your approval on the estimate after reviewing the staging environment. Hello again, I’m confident I can help deliver a clean, launch-ready release and would love to work together.

@chiragpipal

⚠️ If you're not happy, you don’t pay. ⚠️ Hi there, thank you for sharing the detailed project brief. I can build your end-to-end QA and bug-fixing process for your Python backend web app with precise, methodical testing and codebase fixes, ensuring a flawless user experience. I will deliver: • Comprehensive test plan covering critical user flows • Thorough functional testing for all features, including payment integration • Detailed structured bug report with prioritized fixes • Back-end and front-end code fixes, fully tested and documented • Final report with root cause analysis and clean re-test results You will also receive ongoing support and guidance. I am confident I can execute your vision efficiently. Looking forward to discussing timelines and next steps. Best regards, Chirag.

@cuyodigital

Hello, I looked at your senior QA and debugging project. You need test plan, functional testing for auth, dashboard, Stripe payments with webhooks, cross browser testing, negative testing, structured bug report with severities, then fix all bugs in Python backend and JavaScript frontend. I have 8+ years in QA and debugging, and 30+ pre launch testing and fixing projects delivered. See examples: https://www.freelancer.com/u/cuyodigital. Deliverables: test plan, bug report, fixed code, final report. Hourly rate is 20 USD. Two questions: Which Python framework is used on the backend Django, Flask, or FastAPI? Approximately how many API endpoints and user roles are in scope? Let me know. I can start right away. Ricardo

@nemanjam61

Hello, I can handle both the QA process and the bug fixing, covering end-to-end testing, Stripe payment flows, webhook validation, cross-browser testing, root-cause analysis, and clean fixes across Python, JavaScript, and PostgreSQL. I have a question, approximately how large is the codebase and are there any known critical issues you already want prioritized? I can start immediately and provide clear reports, reproducible findings, and verified fixes.

@dipak1337

Hi, I have 8+ years of experience in QA, API testing, payment gateway validation, and web application development. I have worked on projects where I handled both end-to-end testing and fixing issues directly in Python, JavaScript, APIs, and databases. My approach: • Create a risk-based test plan covering authentication, dashboard workflows, permissions, and Stripe payment/webhook scenarios • Perform functional, regression, negative, cross-browser, and API testing • Log detailed bugs with screenshots, videos, console/network evidence, and severity ratings • Debug root causes and implement clean fixes in both frontend and backend code • Retest all fixes and provide a final launch-readiness report I have experience testing payment flows including successful payments, failed cards, webhooks, subscriptions, refunds, and role-based access control. Available to start immediately. Estimated timeline: 5–7 days depending on application complexity. Regards, Dipak P.

@novalitztech

Hi, I see that you're in the final stages before launching your web application and need a senior QA and debugging expert to ensure everything runs smoothly. I can help by methodically testing the critical user flows, from registration to payment processing, and making sure that all functionalities are working as expected. I'll start with a comprehensive test plan that covers all essential areas, including cross-browser and device compatibility. Once testing is complete, I'll deliver a structured bug report prioritizing issues for your team to address, followed by debugging and fixing the identified problems in both the front-end and back-end code. My approach focuses on finding root causes to create clean, long-lasting solutions. I've worked on similar projects where I handled both testing and debugging, ensuring high-quality applications ready for production. I'm committed to clear communication and delivering reliable results. Best regards, Novalitz Tech