Full-Stack TypeScript Developer for PWA Completion

@Microlent

Chance Plus is clearly beyond a simple MVP completion job. The critical work is making the existing customer, vendor and admin workflows production-safe, especially vendor data isolation, OTP authentication, QR single-use redemption, financial calculations and deployment. I would begin with a structured review of the TypeScript workspace, PostgreSQL migrations, API contracts, automated tests and documented issue list, then prioritize fixes based on production risk. For QR redemption, I would ensure duplicate claims are prevented at the backend/database transaction level rather than relying on frontend checks. I would also test role boundaries and vendor isolation directly through API scenarios. The existing React/Vite, Node/Express, PostgreSQL/Drizzle and PWA stack is suitable, so my preference would be to harden and complete it rather than introduce unnecessary rewrites. I can provide milestone-wise execution covering audit, functional fixes, security/critical workflows, production setup, deployment and final handover. Portfolio: https://www.freelancer.com/portfolio-items/11539740-microlent-systems-portfolio Please share the source ZIP and documented issue list once shortlisted. I can then provide a responsible fixed-price quotation, timeline, milestones, third-party costs and exclusions based on the actual remaining work. Rajesh

@C0RETECHIES

Hi, Chance Plus operates as a multi-sided deal marketplace connecting users to local offers. Operationally, the critical paths are secure vendor data isolation, accurate commission ledgering for weekly settlements, and a strictly transactional QR redemption flow that guarantees prevention of race conditions and duplicate claims. Technical approach: I will start with a code audit of the pnpm workspace. For backend security, I will review Express middleware and Drizzle ORM queries to enforce strict RBAC and tenant isolation. The QR redemption will be secured using PostgreSQL transaction blocks and idempotency logic to prevent double-spending. Deployment will involve setting up the runtime environment, Nginx for the Vite PWA routing, automated SSL, and a cron-based backup strategy for the database. Core modules: - Claim Engine: Transactional QR scanning, real-time invoice calculation, and single-use validation. - Vendor Workflow: Isolated dashboard views, secure OTP access, and precise commission tracking. - Production Hardening: Purging demo seeds, securing API endpoints, and implementing real SMS gateways. Relevant systems: - StepOut Live (Live deals and QR-based ecosystem) - Squared QR Menu (Multi-tenant vendor QR platform) Implementation strategy: 1. Audit existing TypeScript codebase and resolve documented issues. 2. Implement missing logic including real OTP, QR locks, and RTL refinements. 3. Perform security, role isolation, and concurrent redemption testing. 4. Provision the production server, setup DB monitoring, and deploy via HTTPS. Regards, Rohit

@sharmarahulraman

Hi, I’d be happy to take Chance Plus from its current MVP stage to a tested, secure, production-ready deployment. I have experience with TypeScript, React/Vite, Node.js/Express, PostgreSQL, REST APIs, PWA development, authentication, and admin/vendor dashboards. I can handle: • Code review and production issue fixes • Security, roles & vendor data-isolation testing • Real OTP/SMS integration • QR scanning and duplicate-redemption prevention • Production database, backups & monitoring • Removing demo access/data • Deployment, HTTPS and domain configuration • Final testing and technical documentation • Arabic RTL and bilingual functionality validation A few points I’d confirm after reviewing the source ZIP: 1. Which OTP/SMS provider is preferred? 2. Is the production hosting environment already available? 3. Are there any known critical issues from the existing documentation? 4. Which monitoring/backup requirements do you currently have? I can provide a fixed-price quotation, milestone breakdown, timeline, third-party costs, and exclusions after reviewing the codebase and documented issues, rather than guessing without access to the existing implementation. I’d be happy to be considered for the shortlist and complete the project through production launch.

@DrSyafiq

I can help you build this properly. You're building Full-Stack TypeScript Developer for PWA Completion, where the real delivery risk is usually in the workflow details, not just the feature list. Relevant fit: Mobile App Development, NoSQL Couch & Mongo, Node.js with milestone-driven delivery. Key scope I would cover: Mobile App Development implementation risks and acceptance criteria; NoSQL Couch & Mongo integration points and edge cases. If helpful, I can outline the first milestone around the riskiest part of the build before we start. Quick question: What part of this build has caused the most delivery risk so far: architecture, integrations, or product clarity? Also, if we align on the core scope first, would you prefer the first milestone to focus on a stable MVP foundation or on feature breadth? Best, Dr. Syafiq

@ahmadayaz

I fully understand the importance of completing, testing, and deploying the bilingual Arabic/English PWA named Chance Plus seamlessly. I intend to review the existing code, address issues, and enhance security measures to ensure optimal outcomes. With expertise in TypeScript, React, Node.js, PostgreSQL, and PWA, I am well-equipped to exceed expectations for Chance Plus. Let's collaborate closely to meet your business objectives and deliver a high-performing application.

@XanvraTECH

Hello, I am very interested in completing the Chance Plus PWA project with my expertise in Mobile App Development, NoSQL Couch & Mongo, Node.js, AngularJS, PostgreSQL, and REST API. I understand the requirements of reviewing existing code, fixing production requirements, testing security, and deploying the application. I have a strong background in Full-Stack TypeScript development and have successfully completed similar projects in the past. - MY WORK STATS: ✨ https://www.freelancer.com/u/XanvraTECH I would love to discuss this project further and provide you with more insights on how I can contribute to its successful completion. Best regards, Warda Haider

@toriquldev123

Hello There! I’m Md Toriqul Islam, an experienced Full-Stack TypeScript developer with 10+ years of experience in React, Node.js, PostgreSQL, REST APIs, PWAs, and production deployments. I understand you need an existing bilingual Arabic/English PWA completed, tested, security-audited, configured with real OTP/SMS, PostgreSQL, QR redemption protection, monitoring, and deployed securely to chanceplus.app. I have rich experience in TypeScript, React, Vite, Node.js, Express, PostgreSQL, Drizzle ORM, Tailwind CSS, PWA, REST/OpenAPI, authentication, and cloud deployment. I am skilled in security testing, role-based access, data isolation, API testing, database configuration, backups, monitoring, and production hardening. I can review the existing code and documented issues first, then complete the remaining requirements, thoroughly test the MVP, configure production services, deploy it, and provide final documentation. I have some questions: 1)Which CRM are you currently using, and do you already have the required API/integration credentials? 2) Do you have a preferred WordPress builder such as Elementor, Divi, or Gutenberg? 3) How many landing pages are you planning to build after the pilot page? Looking forward to hearing from you. Best regards, Md Toriqul Islam

@vishal1145

Your PWA will fail security audits if vendor data isolation isn't enforced at the database query level, not just the UI layer. Without proper row-level security in PostgreSQL, one vendor could access another's transaction history through API manipulation. Quick questions - are you currently using Drizzle's RLS policies or relying on application-layer filtering? And what's your target load for concurrent QR redemptions during peak hours? Here is the architectural approach: - POSTGRESQL RLS: Implement row-level security policies in Drizzle migrations to enforce vendor isolation at the database layer, preventing cross-tenant data leaks even if application logic fails. - QR REDEMPTION LOCKING: Add optimistic locking with version columns to prevent race conditions when multiple devices scan the same QR code within milliseconds. - OTP/SMS INTEGRATION: Configure Twilio or AWS SNS with rate limiting and retry logic to handle Arabic character encoding and prevent abuse during authentication flows. I've deployed 8 production PWAs with similar multi-tenant architectures that handle 10K+ daily transactions. Let's schedule a 20-minute technical review of your codebase before you finalize the scope.

@denisSolution

Hi, I’m Denis, a full-stack developer who has worked on bilingual PWAs with role-based access, real-time integrations, and secure payment flows. For Chance Plus, I’ll focus on hardening the existing system rather than rebuilding it. I’ll start by reviewing the documented issues and the current state of the codebase to prioritize the most critical fixes—like OTP setup, QR redemption logic, and vendor data isolation. The PostgreSQL configuration and backups will be straightforward with Drizzle, and I’ll ensure the OpenAPI spec stays aligned with the actual endpoints during testing. Once the core is stable, I’ll disable demo features, secure the deployment pipeline, and set up basic monitoring. A couple of realistic risks stand out: SMS provider rate limits could slow OTP delivery, and QR collision handling might need extra validation logic. I’ll address these by adding retries and unique claim tokens rather than overengineering. I can start working right away. Let's connect and discuss the details. Thanks, Denis.

@ykarora26

With experience in Full-Stack TypeScript development, I understand the complexity of completing and deploying bilingual PWAs like Chance Plus. I have expertise in TypeScript, React, Node.js, PostgreSQL, and PWA development. How crucial is real-time OTP/SMS integration for enhancing user security and engagement in this project? Regards, Yogesh Kumar

@rajat07me

As a seasoned full-stack developer with over a decade of experience, I can confidently say that your project fits perfectly within my wheelhouse. Throughout my career, I've honed my skills in technologies like TypeScript, Node.js, React, and PostgreSQL - all of which align tightly with your current stack for Chance Plus. Over the years I have worked on numerous projects such as yours, fulfilling varying requirements from enhancing existing MVPs to testing security and performing role-based access control, alongside configuring scalable databases like PostgreSQL. Moreover, my extensive expertise in utilizing AWS services for server setup, monitoring, and security aligns adequately with your need for configuring production database backups. Alongside technical knowledge, I bring an efficient problem-solving approach and an eye for detail that will prove invaluable in reviewing the existing codebase, identifying potential issues, and finding optimal solutions quickly. Choosing me means leveraging the proficiency of a well-established agency like 360 Elevate. Our team has solid experience in both web and mobile app development and we have consistently produced high-quality work while being attentive to client needs. Additionally, our commitment to supporting clients beyond final deliverables has enabled us to build strong long-term relationships - something I envision fostering with you throughout the completion of this project.

@amjidalikhan

Dear Client, Thanks for considering my application for your project. I have reviewed your project, and it best matches with my expertise. With over 6 years of experience as a senior full stack web developer, I can confidently say that I can start IMMEDIATELY and complete the job efficiently and within a short timeframe. You can find more information about me at https://developer-amjid.web.app. I'm eager to commence work on your project and look forward to your positive response. Sincerely, Amjid

@ZohaibRoy

⭐⭐⭐⭐⭐ Experienced Full-Stack TypeScript Developer for Chance Plus PWA ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project requirements and see you're looking for an experienced Full-Stack TypeScript developer for the Chance Plus PWA. You have no need to look any further as Zohaib is here to help you! My team has successfully completed 50+ similar projects for full-stack development. I will thoroughly review the existing code, fix the issues, and ensure a smooth deployment while maintaining high security standards. ➡️ Why Me? I can easily complete your Chance Plus project as I have 5 years of experience in TypeScript, React, Node.js, and PostgreSQL. My expertise also includes working with REST APIs and PWA technology. Additionally, I have a strong grip on security testing and database management, ensuring a comprehensive approach to your project. ➡️ Let's have a quick chat to discuss your project in detail. I'll showcase samples of my previous work, demonstrating my ability in full-stack development. Looking forward to discussing this with you! ➡️ Skills & Experience: ✅ TypeScript ✅ React ✅ Node.js ✅ Express ✅ PostgreSQL ✅ Tailwind CSS ✅ REST API ✅ PWA ✅ Security Testing ✅ Database Management ✅ Automated Testing ✅ Documentation Waiting for your response! Best Regards, Zohaib

@msaqibimran

Hi, the bilingual functionality of Chance Plus stands out as a critical aspect that requires careful attention, especially considering the challenges of managing language support in an existing application. My approach would involve thoroughly reviewing the existing code to identify any gaps in the implementation while ensuring that the production requirements are met with a focus on security and proper user role management. It's clear that the current objectives include completing the remaining features, rigorously testing functionalities like OTP authentication and QR scanning, and ensuring data isolation among different user roles. Addressing these elements is vital for a seamless user experience and overall application performance. Given the scope, I estimate a budget of $1600 to $2400 and a delivery time of approximately 24 days. The final timeline and price can be confirmed once we discuss the specifics and clarify any additional requirements. I’d love to dive deeper into your goals for this project and address any additional concerns you may have. Please let me know a suitable time to chat. Best regards, Mohammad

@Sharazkhan2020

Hi, I can take over the existing Chance Plus TypeScript PWA, work through the remaining production issues, and deliver a tested deployment without rebuilding what’s already complete. Your stack is well structured for this handoff: React/Vite, Node/Express, PostgreSQL with Drizzle ORM, Tailwind, REST/OpenAPI, and pnpm. I’d start with a codebase and migration review, then focus specifically on the higher-risk areas you mentioned: role permissions, vendor data isolation, OTP/SMS, QR single-use redemption, commission/settlement calculations, Arabic RTL, and removal of demo access. My proposed fixed price is $700 USD, assuming the supplied code and documentation match the described MVP state. Estimated timeline: 10 to 14 days. Milestones: 1. Code/security audit and issue confirmation 2. Production fixes, OTP and QR workflows 3. Full role, API, database and bilingual testing 4. PostgreSQL production setup, HTTPS deployment and monitoring 5. Final documentation and source-code handoff Third-party SMS, hosting, domain, monitoring, and backup-provider fees would be paid directly by you and are not included in the development price. Major new features or redesigns outside the documented MVP would be excluded and quoted separately. Can we start with the existing issue list and architecture documentation after shortlisting?

@mughiraaa

Hello, I have already completed similar full stack TypeScript projects involving React, Node.js, PostgreSQL, REST APIs, PWAs, authentication, dashboards, and production deployment. I have strong experience in web development, APIs, and scalable software solutions, so I can quickly review the existing code and documented issues and deliver exactly what is needed. I can handle the remaining fixes, security and role testing, OTP and SMS setup, QR redemption checks, production database configuration, monitoring, HTTPS, and final deployment while keeping the Arabic RTL experience working correctly. Is the current hosting and SMS provider already selected, or should I recommend the best options for production? Happy to review the source and discuss the milestones in a quick meeting. I will share my portfolio in chat I look forward to hear from you. Thanks Best Regards, Mughira

@fullstack0407

With my solid expertise in full-stack technologies - and an admirable track record developing sophisticated, scalable applications - I'm more than equipped to take on your Chance Plus project. As a skilled TypeScript full-stack developer, I can confidently navigate your existing codebase and remedy any issues that may have hindered its progress. My proficiency with React and Vite, Node.js and Express, PostgreSQL and Drizzle ORM – the very same technologies you depend on – means I won't just complete your MVP, I'll optimize it to function at its prime. Furthermore, I fully understand the complexity of features your PWA demands - bilingual support, Arabic RTL interpretation, OTP Authentication, QR scanning for single-use redemption among others – with experience deploying countless tailored solutions like these for different projects. It should be easy for me to reconfigure, test security vulnerabilities and role-based data isolation as well. Lastly, you won't need to worry about the final stages of the project either- from configuring PostgreSQL and thorough testing on all aspects to deploying it successfully connecting with HTTPS- I've got it covered. Even post-deployment stage like backend monitoring and security maintenance are within my repertoire. Ultimately, with me at your service, you can be confident that Chance Plus will reach its full potential. So let's realize your vision together!

@MuhammadAsad108

✔ I deliver 100% work — 99.9% is not for me. ✔ Workflow Diagram Codebase Audit ⟶⟶ Bug Fixes ⟶⟶ Security & Role Testing ⟶⟶ OTP + QR Validation ⟶⟶ Production Database ⟶⟶ Deployment ⟶⟶ Monitoring & Handover Key Highlights ✔ Existing MVP — review the current code and documented issues before changing working functionality. ✔ Full-stack TypeScript — React/Vite + Node/Express + PostgreSQL/Drizzle. ✔ Security — verify authentication, RBAC and strict vendor/customer data isolation. ✔ OTP/SMS — configure and test the real production OTP provider. ✔ QR redemption — validate single-use claims and prevent duplicate redemption/race conditions. ✔ Arabic RTL — test bilingual flows and responsive PWA behavior. ✔ Production hardening — remove demo access/data, configure backups, monitoring and security. ✔ Deployment — HTTPS, domain configuration and production release for chanceplus.app. ✔ Documentation — final deployment, environment and maintenance documentation. Best Regards, Asad Senior Full-Stack TypeScript Developer | React | Node.js | PostgreSQL

@jagratip3

Hey, I’m an experienced Full-Stack TypeScript developer and can take Chance Plus from its current MVP to a secure, production-ready PWA. I can handle React/Vite, Node/Express, PostgreSQL/Drizzle, OTP/SMS, QR redemption, role isolation, testing, security, deployment, HTTPS, backups, and monitoring. I’ll provide clear milestones, timeline, fixed-price scope, third-party costs, and exclusions.