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Type: Fixed-price project (with option to extend into ongoing QA) Category: Mobile QA / Manual Testing Duration estimate: 1–2 weeks Overview We have a Flutter mobile app (Android + iOS) for a sports-coaching marketplace — athletes book sessions with coaches and academies, three user roles (Athlete, Coach, Academy) plus an Admin panel, real backend and real data. Basic QA is already done in-house — core happy-path flows (signup, browse, book, cancel, basic profile edits) have already been tested and are working. We do not need someone to click through the obvious flows again. We need an experienced QA tester who can find the bugs that basic testing misses: edge cases, race conditions, concurrent-user scenarios, partial/malformed input, boundary conditions, and the kind of subtle data-integrity issues that only show up under adversarial or unusual usage — not someone doing a first-pass functional walkthrough. If your QA process is "follow the happy path and confirm it works," this isn't the right fit. If you actively try to break things — rapid double-taps, concurrent sessions, partial form submissions, weird input, interrupted flows — please apply. The debug APK will be shared directly with the freelancer selected for this job (not posted publicly). What You'll Need - A physical Android device or emulator — we'll provide a debug APK once you're selected - Ability to install and sideload a debug build - Strong bug-report writing: steps, expected vs. actual, screenshots/screen recordings, and — where relevant — what state you'd expect on the backend/database and why the observed state is wrong - Comfort inspecting network requests/responses (via a proxy or device logs) to catch silent failures that don't show an error on screen What We Mean by "Advanced" — Test Categories - Race conditions: two devices/sessions booking the same slot simultaneously; rapid double-tap on submit/pay/cancel buttons; switching accounts quickly and checking for state bleed between sessions. - Partial/malformed data: submitting forms with only some fields filled where the API expects all; editing a single field in a large profile object and confirming unrelated fields (venues, availability, packages, gallery) aren't silently dropped. - Boundary and adversarial input: extremely long text, emoji/unicode in names and reviews, 0-byte and oversized file uploads, wrong file types disguised with a valid extension. - Session/auth edge cases: token expiry mid-action, backgrounding the app during a network call, logging in via a different auth method (Google vs Apple vs OTP) on the same account and checking for identity/state conflicts, rapid logout/login cycling. - Discount/pricing logic abuse: applying a discount code twice, applying it after removing it, reusing a one-time code, checking the charged amount actually matches the discounted price shown. - Booking lifecycle edge cases: cancel a booking the instant after creating it, reschedule a booking that's already been cancelled, cancel from two different screens at once, check whether a "cancelled" slot is actually freed up for other users. - Offline/interrupted flows: kill connectivity mid-booking, mid-upload, mid-payment; reconnect and check whether the app recovers cleanly or leaves orphaned/duplicate state. - Cross-role interference: same physical device/account switching between athlete and coach roles (where applicable), checking for cached data leaking across role switches. Deliverables 1. Bug tracker (spreadsheet or your tool of choice) — every finding with severity (Critical/Major/Minor/Cosmetic), exact repro steps, expected vs. actual, evidence (screenshot/recording/network trace). 2. A short note on which categories above you covered and how — we want to know your actual test methodology, not just a pass/fail list. 3. A prioritized "what I'd fix before release" summary, ranked by real user impact and exploitability, not just by how easy each bug is to reproduce. Nice to Have - Background in QA for marketplace/booking/fintech-adjacent apps (two-sided scheduling, payments, discount logic) - Comfort with a proxy tool (Charles/Proxyman/mitmproxy) to inspect and tamper with requests - Prior experience specifically hunting race conditions or data-integrity bugs, not just UI bugs To Qualify / How to Apply This role requires proof of advanced QA thinking before hiring — general applications without this will be skipped. Please DM me directly (do not post publicly in the proposal) with: 1. A specific, non-obvious bug you've found in a past project — not "I tested the login flow and it worked." We want a real example with the technique you used to find it. 2. A short list of 5–8 advanced test steps/scenarios you would personally run against a booking + payment app like this one, in your own words — this is the main screening filter, so make it specific to booking/scheduling/payment logic, not generic checklist items. 3. Devices/tools you have available, and your estimated timeline for the categories listed above. "Nice to Have": "Comfortable using Appium or similar for repeatable regression scripts, if useful for your workflow — not required." That signals openness without changing the core ask. Want me to add that line, or leave the post as-is? Applicants who send a generic proposal without the above will not be considered.
Project ID: 40591705
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40 freelancers are bidding on average ₹7,836 INR for this job

Hello, I have 6+ years of QA experience testing complex web and mobile applications with a focus on edge cases, race conditions, API validation, and data integrity. One advanced bug I found involved duplicate records being created when users rapidly tapped the submit button due to missing backend idempotency checks. For your app, I’d test concurrent booking attempts, duplicate payments, discount code abuse, interrupted network flows, token expiry during transactions, cross-role data leakage, and malformed input scenarios. I can provide detailed bug reports with reproduction steps, severity, screenshots, and network evidence, along with a prioritized release-readiness summary. Best regards, Zain Ul Hassan
₹7,000 INR in 7 days
4.8
4.8

Dear Sir/ Madam, I hope you are doing well. I am writing to express my interest in your project requiring a Manual Tester. With strong experience in testing web and mobile applications, I can help ensure your product is bug-free, user-friendly, and high-quality. ? What I Offer: ✔️ Functional Testing ✔️ UI/UX Testing ✔️ Regression Testing ✔️ Cross-browser & Cross-device Testing ✔️ API Testing (Basic level) ✔️ Detailed Bug Reporting (with screenshots/videos) ?️ My Approach: Understand project requirements clearly Prepare test cases & scenarios Execute test cases thoroughly Report bugs with proper steps to reproduce Retest fixes and ensure quality delivery ? Experience Highlights: Tested multiple mobile apps (Android/iOS) Experience with Flutter-based applications Worked on real-time features like notifications, APIs, and UI validation
₹8,000 INR in 10 days
4.7
4.7

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
₹7,000 INR in 7 days
4.9
4.9

Hi, I have extensive experience with manual QA testing for Flutter applications and have tested Android and iOS apps before production releases. I perform thorough functional, UI/UX, regression, exploratory, and edge-case testing, providing clear bug reports with reproduction steps, screenshots, and screen recordings when needed. I'm detail-oriented, communicate proactively, and can help ensure your Flutter app is stable, polished, and release-ready. I'm available to start immediately and would be happy to support your team on a long-term basis.
₹7,000 INR in 7 days
4.5
4.5

Hello, my name is Rudra Patel and I am an experienced software tester with a proven track record of improving the quality, performance, and user experience of various SaaS, web, and mobile applications. With a strong understanding of the advanced testing measures you require for this project, I am confident in my ability to take your Flutter app through the paces it needs to ensure a truly robust product. What sets me apart from other testers is my ability to think outside the box and actively seek out vulnerabilities. I go beyond following the 'happy path' and actively test for edge cases, adversarial inputs, concurrent-user scenarios, partial/malformed inputs and more - exactly what you specify needing in this project. Throughout my career, I have been meticulous in my bug-report writing. I provide detailed steps, highlight expected vs actual results and utilize different types of evidence like screenshots or screen recordings to ensure efficient communication about issues. With me on board, you won't just get pass/fail lists of bugs found; you will receive a prioritized summary that highlights real user impact and exploitability, ensuring all critical issues are handled promptly down to cosmetic ones.
₹10,000 INR in 7 days
4.6
4.6

Hi! I specialize in finding edge-case and data-integrity issues beyond basic functional testing. In a previous project, I uncovered a duplicate booking bug by triggering simultaneous booking requests from two sessions, allowing the same time slot to be reserved twice. For your app, I'd test concurrent bookings, discount code abuse, interrupted payment flows, token expiry during transactions, cross-role data leakage, rapid double-taps, offline recovery, and malformed API inputs. I'm comfortable using Android devices/emulators, Charles/Burp Suite, and detailed bug reporting with screenshots, recordings, and network analysis. I can complete the advanced QA pass within 1–2 weeks and provide a prioritized release-readiness report with actionable findings.
₹6,000 INR in 3 days
3.7
3.7

"I break booking apps for a living my favorite find was a double-tap on 'Pay' creating two confirmed bookings for one slot, caught via mitmproxy showing duplicate POSTs. For your app I'd hit concurrent slot booking from two devices, discount-code reuse/stacking, cancel-then-reschedule races, token expiry mid-payment, and partial profile edits dropping unrelated fields. Android device + Charles/mitmproxy ready; full coverage of your categories in 7–10 days with severity-ranked repro reports."
₹8,500 INR in 14 days
3.0
3.0

Hi, I have experience testing Android applications beyond standard happy-path scenarios and focus on uncovering edge cases, race conditions, state inconsistencies, and data integrity issues. I'm comfortable with network inspection, detailed bug reporting, and providing clear reproduction steps with screenshots or screen recordings. A non-obvious issue I found previously involved duplicate orders being created when the checkout button was tapped repeatedly during a slow network response. Although only one success screen was shown, two backend records were created because the API accepted multiple requests before the UI disabled the button. Some advanced scenarios I would test include: Simultaneous booking of the same slot from two devices. Interrupting the network during booking/payment and verifying recovery. Rapid repeated taps on Book, Pay, and Cancel actions. Token expiry during checkout and app background/foreground transitions. Applying and reusing discount codes in different sequences. Cancelling or rescheduling the same booking from multiple sessions. Switching between user roles on the same device and checking for cached data leakage. I can provide structured bug reports with severity, expected vs. actual results, evidence, and a prioritized release-risk summary. Will testing require access to the production backend, or will you provide a staging environment with test payment credentials?
₹7,000 INR in 7 days
2.3
2.3

Hello, I hope you are doing well! I have experience testing Android and Flutter applications beyond basic functional QA, with a focus on edge cases, race conditions, data integrity, session handling, and API validation. A bug I found in a previous booking app involved rapid double-tapping the payment button, which created duplicate bookings because the backend didn't enforce idempotency. I reproduced it consistently using network throttling and documented the issue with logs and screen recordings. I'm ready to start immediately and can provide thorough, reproducible reports with screenshots, recordings, and clear expected vs. actual results.
₹1,500 INR in 7 days
0.9
0.9

Hi! I have experience testing mobile applications beyond the basic happy-path flows, with a focus on uncovering race conditions, edge cases, data integrity issues, and booking/payment logic bugs. For your app, I'd specifically test scenarios like concurrent booking attempts, rapid double-taps, interrupted payment/booking flows, discount code abuse, token expiry during actions, offline recovery, and cross-role session switching to identify issues that typical functional testing misses. I have access to Android devices/emulators and I'm comfortable using network inspection tools (Charles/mitmproxy) to investigate silent API failures and backend inconsistencies. I'll provide detailed bug reports with reproduction steps, expected vs. actual results, screenshots/screen recordings, severity, and release priorities. I'm available to start immediately and can complete the testing within your 1–2 week timeline. I'd be happy to discuss the project further.
₹11,113 INR in 14 days
0.4
0.4

Hi, I hope you're doing well. I understand you need an advanced manual QA tester who can go beyond basic functional checks and identify hidden issues in a Flutter marketplace app, especially around booking flows, payments, data integrity, concurrency, and edge-case user behavior. The goal is to uncover release-blocking issues before real users encounter them. I will perform structured exploratory testing across athlete, coach, and academy workflows, focusing on race conditions, interrupted actions, malformed inputs, authentication edge cases, pricing logic, booking lifecycle scenarios, and cross-role data handling. I will provide detailed bug reports with reproduction steps, expected vs actual results, evidence, severity ratings, and a prioritized release-readiness summary. My focus is on delivering actionable QA insights with thorough testing methodology, clear documentation, and practical recommendations that help improve app stability and user trust before launch. Best regards, Heorhii
₹8,888.88 INR in 8 days
0.0
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Hi, At first glance, this looks straightforward but there’s usually one part that causes issues later. Happy to share a quick plan if you're open to it. Regards, Rajesh
₹7,000 INR in 7 days
0.0
0.0

It looks like you're seeking an experienced QA tester to identify subtle bugs in your Flutter sports-coaching app that basic testing might miss. The focus on edge cases like race conditions and malformed inputs indicates a need for a thorough and aggressive testing approach. My first step would be to simulate concurrent bookings to identify potential issues with state management and data integrity, ensuring that interactions between users don't lead to unexpected behavior. In a recent project for a booking app, I uncovered a critical race condition where simultaneous bookings caused data corruption, which I documented with detailed steps and backend state expectations. What specific types of devices do you anticipate the testing will require, and do you have a preferred timeline for delivery? — Collen
₹5,000 INR in 7 days
0.0
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I specialize in advanced mobile QA for Flutter applications, focusing on race conditions, concurrent-user scenarios, booking/payment workflows, session management, offline recovery, API validation, and data-integrity testing rather than basic functional checks. Using physical devices, network inspection tools (Charles/mitmproxy), detailed screen recordings, and structured bug reporting, I will deliver reproducible findings with severity analysis, backend impact assessment, and a prioritized release-readiness report to help ensure your app is stable, secure, and production-ready.
₹7,000 INR in 7 days
0.0
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"Nice to Have With my extensive experience in software development and deep expertise in Flutter, I can offer you an unparalleled advantage. Being intimately familiar with not only the surface-level functions of apps but also their intricacies, I have an advanced understanding of testing methodologies that extend far beyond following a happy path or simply replicating standard functionalities. Moreover, my strength lies in the breadth of my knowledge which includes not just quality assurance but all aspects of end-to-end development from UI/UX design to backend development to maintaining an efficient and effective cloud deployment (including CI/CD) as well as dedicated Linux Server Administration. I have built numerous applications for different purposes utilizing different technologies which gives me a unique perspective while performing QA tests because I know what it takes to convert an idea into a working product. That coupled with my commitment to delivering results aligned with your vision makes me a perfect fit for your Flutter mobile app testing needs.
₹1,500 INR in 7 days
0.0
0.0

Hello, I am interested in helping you ensure the quality and reliability of your application. I have 5+ years of experience in Software Testing**, specializing in Manual Testing, Web Application Testing, API Testing, Database Testing, and Functional Testing. I have worked on various web-based applications and have extensive experience in identifying critical defects before production. ### What I can offer: * Functional Testing * Regression Testing * Smoke & Sanity Testing * UI/UX Testing * API Testing (Postman) * Database Testing (SQL) * Cross-browser and Cross-device Testing * Bug Reporting with detailed reproduction steps * Test Case and Test Scenario Creation * Retesting and Verification of Fixed Issues ### Why choose me? * Strong attention to detail * Clear and timely communication * High-quality bug reports with screenshots/videos * Fast turnaround without compromising quality * Commitment to delivering a thoroughly tested product I am confident that I can help improve your application's quality and user experience. I am available to start immediately and can provide regular progress updates throughout the project. I would be happy to discuss your project requirements and create a testing plan tailored to your needs. Thank you for your time and consideration. I look forward to working with you. Best Regards, Geetanjali Gharge Software QA Engineer | Manual Testing | API Testing | Database Testing
₹10,000 INR in 7 days
0.0
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Hello, I am a QA Engineer with 3.5+ years of experience in Manual and Automation Testing. I have hands-on expertise in Playwright (JavaScript/TypeScript), API Testing (Postman), SQL, and end-to-end testing. I can thoroughly test your application, identify bugs, provide detailed reports, and ensure a high-quality, reliable product. I am committed to clear communication, timely delivery, and delivering results that meet your expectations. I would be happy to discuss your project requirements and start immediately. Thank you for your time and consideration.
₹13,000 INR in 10 days
0.0
0.0

Hi, I'm a Manual QA & Automation Tester with a Cybersecurity background, experienced in testing real-world applications beyond standard functional testing. My expertise includes regression testing, API validation with Postman, Selenium automation, bug reporting, and identifying edge cases that affect reliability and data integrity. I approach testing with an adversarial mindset, focusing on race conditions, session handling, duplicate requests, authorization issues, and unexpected application behavior. For a booking and payment app, I would test: Simultaneous booking from multiple devices. Rapid repeated taps on booking/payment actions. Network interruption during booking or payment. Discount code validation and pricing consistency. Session expiration and account switching. Profile updates to ensure unrelated data isn't overwritten. API responses against UI behavior. Offline/online recovery and backend consistency. Tools: Android device & Emulator, Postman, Selenium, Jira, Chrome DevTools, and Burp Suite. I provide detailed bug reports with reproduction steps, expected vs. actual results, severity, screenshots/videos, and API observations where applicable. I'm available to start immediately and can complete the testing within 1–2 weeks. Best regards, Mohammed Ramzi
₹7,000 INR in 7 days
0.0
0.0

Hands on experience in to define test strategies and according to that preparation of test plan and execution will be perform as per plan.
₹7,000 INR in 7 days
0.0
0.0

Hello, Your project is exactly the type of QA work I enjoy. I have 8 years of Manual QA experience testing Android, iOS, and web applications, including marketplace, booking, payment, and enterprise systems. Since your happy-path testing is already complete, my focus is on uncovering production-critical issues such as edge cases, race conditions, concurrency problems, and data integrity defects. One example: I identified a duplicate booking issue by submitting simultaneous booking requests from two Android devices while throttling one device's network. Both bookings succeeded due to a backend concurrency flaw. I documented the issue with API logs, timestamps, and screen recordings, helping the team identify the need for atomic transaction handling. For your app, I would test: Concurrent booking attempts Network interruption during booking/payment Rapid repeated actions (Book/Pay/Cancel) Coupon validation and pricing logic Profile update integrity Session/token expiry and account switching API validation using Postman and DevTools Tools: Android device & emulator, Postman, Chrome DevTools, Jira, Excel/Google Sheets. Deliverables: Clear bug reports with severity, reproduction steps, expected vs. actual results, screenshots/videos, and a prioritized release-risk summary. I enjoy finding issues that standard functional testing often misses and would be excited to help improve the quality and reliability of your sports coaching marketplace.
₹12,000 INR in 14 days
0.0
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Nashik, India
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