Comprehensive Fintech App QA and Security Audit

@abdullah1826

Hi, Comprehensive Fintech App QA and Security Audit "", We provide complete frontend to backend development with clean, scalable, and high-performance solutions tailored to your requirements. Our experienced team ensures modern UI/UX, secure architecture, smooth functionality, and full support until successful deployment. Let’s build a reliable and impactful product together. Regards, Muhammad Abdullah

@inertiasoftltd

Hello, With a well-rounded background in web development and mobile app creation, I believe I am the ideal fit for your comprehensive fintech app QA and security audit. As an expert with over 8 years of experience, I have developed a deep understanding of numerous technologies including React, Supabase, PostgreSQL and more that perfectly aligns with the requirements of your project. I’m well versed in JavaScript as well which enables me to perform robust API testing and fixes. Security is of utmost importance in the fintech industry and my knowledge of authentication protocols such as JWT-based authentication adequately equip me to conduct stringent security reviews to safeguard sensitive data and ensure there are no permission bypasses or token leaks. Lastly, my dedication to delivering exceptional results on time will come in handy as I take complete ownership of your fintech app’s testing, security audit, mobile readiness, etc., working independently yet responsibly throughout the project. You can rely on me for efficient bug-fixing grunt work to essential pre-deployment testing. Let's connect and discuss how we can turn your digital vision into reality! Thanks!

@usamae

React + Supabase is a stack I know well - specifically the Supabase RLS gotchas that fintech apps hit most often: policies that look correct in the dashboard but leak data when accessed with a service-role key, or auth bypass edge cases during token refresh. For the QA scope you've outlined - I'd work through it systematically: Postman collection for all APIs (auth flows, token expiry, error cases), manual RLS validation on critical tables, OWASP Top 10 review at the application layer (no deep pentest but solid coverage), and cross-browser smoke testing. The Go Live Approval Checklist I can structure so you can sign off each section clearly before handing to the mobile team. I do want to flag - the scope here is more than a $120 NZD job. My bid reflects what I'd actually need to do this properly without cutting corners on a fintech app. - Usama

@Rajoriadares

Hello Client, Greeting of the day!!!! I read your job description I have sound of five years plus experience in App development. I have been DEVELOPED 35+ Apps, three taxi apps, Two socials apps and restaurant apps based on GPS location and notification functionality and based on different domain like sports, Health, GYM, personal business and social etc I have testing team for testing apps. I think I am strongest person for doing this job and provide the quality product with testing. I am always available for your support. Thanks Sr. Mobile Developer

@VianRey1

Nothing is more stressful than prepping a fintech app for launch and running into hidden bugs, risky permissions, or slow performance that threatens user trust. Seeing onboarding or dashboard flows break or realizing APIs are not fully secure can be costly and derail your timeline. You deserve a rock-solid web application that is stable, secure, and ready for mobile handoff without last-minute surprises. By the end, you can expect a bug-free, fully tested app with a clear checklist showing it is ready to go live. First, I will dive into functional and API testing to flag and fix any broken flows or security holes. Next, I will review the app’s security and performance, making sure sensitive data and permissions are tight. Finally, I will validate cross-browser UX and confirm readiness for mobile deployment with a go live approval checklist. Which phase are you most concerned about right now, functional testing or security review?

@GameOfWords

Comprehensive Fintech App QA and Security Audit I’m a full-stack software engineer with expertise in React, Node.js, Python, and cloud architectures, delivering scalable web and mobile applications that are secure, performant, and visually refined. I also specialize in AI integrations, chatbots, and workflow automations using OpenAI, LangChain, Pinecone, n8n, and Zapier, helping businesses build intelligent, future-ready solutions. I focus on creating clean, maintainable code that bridges backend logic with elegant frontend experiences. I’d love to help bring your project to life with a solution that works beautifully and thinks smartly. To review my samples and achievements, please visit:https://www.freelancer.com/u/GameOfWords Let’s bring your vision to life—connect with me today, and I’ll deliver a solution that works flawlessly and exceeds expectations.

@khurshid040462

Hi there, I’ve thoroughly reviewed your project requirements for the Comprehensive Fintech App QA and Security Audit and I'm confident in my ability to deliver exceptional results. With extensive experience in React and Supabase, I specialize in thorough functional and security testing, ensuring your fintech application meets all required standards. I will conduct rigorous functional testing across user onboarding processes and dashboard functionalities, validate APIs using tools like Postman, and apply crucial security measures relevant to the fintech sector. My aim will be to identify and fix performance bottlenecks while ensuring cross-browser compatibility and an excellent user experience. We can aim for a smooth deployment within the budget of 130 - 145 NZD. Let’s discuss this in further detail to align on expectations and timelines.

@xeeshanrafiq38

Hello, I can thoroughly test, secure, and stabilize your React + Supabase fintech app to ensure it’s fully launch-ready and prepared for mobile deployment within your budget.

@murtuza90

With over 13 years of seasoned expertise ranging from backend development in PostgreSQL, frontend prowess using AngularJS, to Javascript wizardry, I am the perfect fit for your project. Having worked extensively with fintech apps and platforms, I intuitively understand the complicated universe of financial calculations, secure API testing, JWT-based authentications, and Row Level Security (RLS). With your project's tech stack of React, Supabase, and PostgreSQL squarely within my core wheelhouse, expect an intuitive fit. While an audit calls for an unrelenting eye for detail, I also appreciate the broader picture that you're seeking. With a rich experience both behind the scenes and leading dev teams towards market-ready, high-performance applications that eliminate technical debt, I will deliver on even more than what you stated. Furthermore, with my strong background utilizing tools such as Postman and my deep knowledge of ????? ???-10 security measures, I am committed to protect your app from financial breaches and vulnerabilities. My approach is marked by test-driven development practices and rigid code review principles – where quality is not just achieved but assured from milestone to milestone. What further sets me apart is my knack for seamless communication. I guarantee a 5-star client experience through engaging and effective exchanges as we define, design, and refine your vision together.

@AZTURK1

Hi there, I will lead a full QA, security review and mobile-readiness pass for your React 18 + Supabase fintech app , I’ve stabilized payment-adjacent systems and enforce RLS/JWT protections for financial workflows. - Functional & feature testing: onboarding, email verification, dashboard flows, RBAC and accurate calculations (end-to-end) - API testing & fixes: Postman validation, token/session expiry checks, tighten Supabase APIs and RLS on PostgreSQL - Security & performance: OWASP Top 10 checks, sensitive-data hardening, reduce load times <3s and prepare mobile handoff - Deliverables: fully tested/stabilized web app, Go Live Approval Checklist, technical summary + fixes applied Skills: ✅ API Testing ✅ React 18 (Vite, TypeScript) ✅ Postman / API validation ✅ Supabase deployment/integration ✅ RLS validation / OWASP Top 10 / performance tuning ✅ PostgreSQL / JWT-based authentication Certificates: ✅ Microsoft® Certified: MCSA | MCSE | MCT ✅ cPanel® & WHM Certified CWSA-2 I can start immediately, deliver a tested web release and checklist in 1 day for $140 NZD. I will use staged validation, rollback plans and test accounts to ensure zero-surprise launch. Do you have a staging environment and test accounts for each user role (admin, standard user, accountant) and can you share current RLS policies/access examples so I can begin verification? Best regards,

@Fahadghouri7

With your Fintech project requiring comprehensive QA, Security Audit, and Mobile Readiness, I am Fahad Ghouri, an experienced full-stack and QA-focused developer, uniquely capable of addressing the entire scope independently. I have an active expertise with React, TypeScript, Supabase, and PostgreSQL - core technologies needed for this project. My proficiency with tools like Postman bolsters API testing that is both foolproof and secure. Aware of OWASP Top 10, my security measures will be real coverage-focused without compromising any possible token leaks or permission bypasses. Performance and stability hold equal importance for me as they do for you. Having crafted websites that load under 3 seconds, I'm equipped to identify and eliminate possible bottlenecks in your app ensuring its seamless functioning even after mobile handoff. Moreover, as a UI/UX designing expert too, the cross-browser and UX validation is within my purview. In line with your budgetary constraints of $140-$160 NZD, you can be assured of receiving a flawless product delivering each of your desired requirements. With a solid track record to back it up, I'm confident that we can enhance your Fintech web application's functionality, optimise its performance tremendously making it go-live ready on both the web & mobile versions!

@shibbuquadir

At Paper Perfect, delivering exceptional results is our top priority. My team and I have hands-on experience in API development, JavaScript, and Mobile App Development - exactly the skill set you need for your Fintech project. As a full-stack developer, I am well-versed in both front-end and back-end technologies, including React, the core framework of your web application. Understanding that rigorous testing and security measures are crucial for a Fintech app, we assure an in-depth audit not only to identify vulnerabilities but also to safeguard your users' sensitive data. Our pragmatic understanding of JWT-based authentication and focus on Row Level Security guarantees protection from potential auth leaks or permission bypasses. Moreover, at Paper Perfect, we value transparency. Alongside delivering a fully tested and stabilized web application, we will provide you with a clear technical summary of the work done and a comprehensive Go Live Approval Checklist for your sign-off. So let our reliable and skilled freelance development team handle the entire scope independently while bringing your vision to life!

@natanr28

HELLO, HOPE YOU ARE DOING WELL! I have carefully reviewed your outline for full-scope QA, security audit, and launch preparation of your fintech app built with React, Supabase, and related technologies. I am perfectly suited for this role, having managed end-to-end testing and security validation for modern web apps, especially in sensitive domains like fintech. My approach will be to systematically cover all stages outlined—starting with comprehensive functionality/UX testing and API validation, then focusing on fintech-specific security review (RLS, token handling, OWASP-10 best practices), performance optimization for both web and mobile, and detailed readiness reporting. I’ll deliver both clear issue tracking and a comprehensive Go Live Approval Checklist, ensuring your product is launch-ready. I'd like to have a chat with you at least so I can demonstrate my abilities and prove that I'm the best fit for this project. Warm regards, Natan.

@craigd43

With an extensive background in web application development and a tech stack proficiency that aligns closely with your project, I stand out as an ideal candidate for the Comprehensive Fintech App QA and Security Audit. My experience with PHP, Node.js, Vue.js, and C# has honed my skills to deliver top-notch full-stack solutions. Importantly, I have JavaScript expertise which is pertinent to your React-based front-end. Focusing not only on functionality but also on security conscious design and implementation is my strength. I understand the gravity of handling sensitive financial data and can assure you that I will comply with industry-standard protocols while conducting the security audit of your fintech app. Moreover, your approach towards mobile readiness is in sync with my practices of ensuring the applications stability across different platforms be it iOS or Android. I look forward to integrating my skill set seamlessly with your requirements to complete the project within budget and exceeding your expectations in terms of quality and timeliness. Your project seems challenging but exciting, and I'm driven by such projects as they allow me to showcase my abilities at their fullest potential. Let's discuss how we can turn your product into a secure, high-performing one!

@gauravl3

With extensive experience in Full-Stack Development and a comprehensive understanding of cloud solutions, I am the right fit to ensure the successful execution of your Fintech application project. I have a proven track record in building robust, efficient, and user-friendly applications, which perfectly aligns with the goals you've set for this project. My expertise across multiple technologies ensures that I bring the right tools and strategies to ensure the highest-quality product throughout every phase. My skills in AngularJS and JavaScript make me an asset for your React app testing, where I will analyze every nook and cranny, leaving no room for broken links or blocked flows. Additionally, my proficiency in AWS, Azure, and Google Cloud will be instrumental in identifying any possible security risks and mitigating them with foolproof measures. I understand that the financial industry demands utmost security; therefore, I prioritize sensitive data protection and enforce strict measures such as RLS validation on all critical tables. My focus on OWASP Top 10 awareness will further guarantee that your platform remains impregnable. I assure not only bug-free code but also stable web performance under 3 seconds load time, ensuring the stability for mobile handoff. You'll have a ready-to-go, go-live approval checklist as my final deliverable. Let's make your Fintech App shine together!

@offensiumvault

We at Offensium Vault Private Limited (ISO 27001:2022 & ISO 9001:2015) can support you specifically on the Security Audit portion of this fintech web application — not full QA or feature fixing. Given your stack (React 18 + Supabase + PostgreSQL + RLS + JWT), we will focus on fintech-grade security validation aligned with OWASP best practices. Scope We Will Cover (Security Only) 1️⃣ Authentication & Session Security • JWT handling & token expiry validation • Auth flow review (login, reset, verification) • Session management & token storage risks • Detection of auth leaks or permission bypass 2️⃣ Supabase & RLS Validation • Row Level Security review on critical tables • Role-based access validation • API exposure & public endpoint checks • Sensitive data protection (financial records) 3️⃣ OWASP Top 10 Coverage • Broken Access Control • Injection risks • Security misconfigurations • Token/session leakage risks 4️⃣ API Security Testing • Input/output validation • Error handling exposure • Unauthorized access attempts • Token misuse scenarios ⸻ Deliverables • Security Audit Report (risk-ranked findings) • Clear remediation guidance • CVSS-based severity classification • Fintech-focused security recommendations • Readiness assessment from a security perspective We will not handle UI fixes, performance tuning, or general QA — strictly security. We can begin immediately upon access to staging and API documentation.

@Hubready

Hello! I am a US-based senior software engineer with extensive experience in fintech applications, and I’ve carefully read your project description for the Comprehensive Fintech App QA and Security Audit. I understand the importance of thorough testing and security measures for your React and Supabase-based web app, and I'm here to help ensure it meets the highest standards. With over 15 years of experience, my expertise includes JavaScript, mobile app development, and QA testing, making me a strong fit for your project. I focus on delivering solutions that are both technically sound and practical for real users. To ensure I can provide the best service, could you please clarify the following questions to help me better understand the project? 1. Are there specific security compliance standards you need to meet for this audit? 2. What are the main functionalities of the app that you want me to focus on during the testing phase? My approach includes structured milestones and clear communication, ensuring that we stay aligned throughout the project. I’m dedicated to delivering production-ready code without shortcuts. I look forward to the opportunity to discuss your project further. Let’s make your fintech app secure and user-friendly! Best, James Zappi

@NareshJoshiTech

Hello, I’ve gone through your project details carefully, and I must say it sounds really interesting. I’d love to bring my experience to make it a success. With over 10 years of hands-on experience in web, mobile, and software development, I’ve had the privilege of working with clients from around the world — delivering 1000+ successful projects so far. My team and I are comfortable working with technologies like MEAN, MERN, Flutter, React Native, PHP, Laravel, Python, WordPress, Shopify, AI, Blockchain, CRM, CMS, and more. What truly drives me is solving complex challenges and transforming ideas into reliable, user-friendly products. I always aim for clear communication, transparency, and results that make clients feel confident they chose the right partner. You can review my portfolio here: https://www.freelancer.in/u/NareshJoshiTech I’d really appreciate the chance to discuss your project in detail and explore how we can create something great together. Looking forward to hearing from you. Warm regards, Naresh Joshi

@dipak1337

Hello, You’re looking for someone to take full ownership of testing, fixing, and preparing your React + Supabase fintech app for launch and mobile readiness. The focus is not just finding bugs, but stabilising the system end-to-end with security, RLS validation, API integrity, and performance under control. My approach: 1) Functional & Flow Validation Deep testing of onboarding (verification, login, reset), dashboard flows (budgeting, transactions, refresh logic), and strict role-based access checks. I’ll verify financial calculations for accuracy and edge cases. 2) API & Auth Review Systematic API testing via Postman: input validation, error handling, token expiry, session handling, and exposure risks. I’ll confirm no public endpoints bypass RLS or JWT controls, and apply fixes where required. 3) Fintech Security Coverage RLS validation across critical tables, sensitive data exposure checks, permission bypass attempts, and practical OWASP coverage aligned to Supabase architecture. 4) Performance & Cross-Browser Load time optimisation (<3s target), bottleneck identification, logging cleanup, and validation across Chrome, Safari, Firefox, and Edge. UX sanity testing for real-user clarity. Best Regards - Dipak Prajapati