Experienced Full-stack Developer Needed to Complete Existing SaaS Platform (UI + Core Features)

@ashishnegi30193

Hi, I’m a strong Full-Stack developer with solid experience in React (TypeScript), Node.js (Fastify), PostgreSQL (Prisma), and AWS services. I’m comfortable jumping into existing SaaS codebases, refining UI, implementing features, and stabilizing production without disrupting the current architecture. Available 5 days/week (40 hrs) for fast, milestone-based delivery with clean Git workflow and responsive communication. Rate: $7–$10/hour (flexible depending on scope and timeline). Happy to get started immediately.

@neerajdhameliya

Hello, Since your backend and infrastructure are already 90% complete, my focus would be clean execution, not reinventing what’s already working. I understand you need someone who can respect the existing TypeScript architecture, step into the current codebase confidently, and deliver UI polish and core feature completion without rewrite friction. With 8 years of full-stack experience, I specialize in stabilizing SaaS platforms in the final stage of development, where performance, cleanup, and production readiness matter most. -> Comfortable working directly with Prisma schemas and Fastify routes, no ramp-up delays. -> Strong TypeScript discipline to ensure React UI updates don’t introduce type or runtime instability. -> Experienced with DigitalOcean deployments and AWS SES/S3 integrations for production stabilization and bug fixing. I work milestone-based, follow clean Git workflows, and prioritize fast, responsive communication. Availability: 40 hours/week (Mon–Fri, 10:00 AM–7:30 PM IST) Rate: $12/hr Quick question: Is the referral logic primarily handled at the Prisma level, or will we be expanding validation and tracking inside Fastify controllers? Happy to review the repo and align on the first milestone. Best, Niral

@vipinjain1213

Hi, Since the platform architecture is already in place, this looks more like stabilization and feature completion rather than new development which usually means working carefully inside the existing codebase without breaking flows. We are comfortable jumping into ongoing SaaS projects built with React (TS) + Fastify + Prisma/PostgreSQL, focusing on UI refinement, feature completion, and production cleanup. W can help with: • UI updates aligned with current components • Referral feature refinement • Admin panel improvements • Bug fixing & performance cleanup • Production stabilization before release • Clean Git-based milestone workflow Availability: ~30–40 hrs/week Rate: within your listed range (open to milestone structure) Quick question — is there an active staging environment for testing before pushing fixes to production? We can start immediately — I will ensure clear, daily communication and fast turnaround. You’ll always know the exact progress.

@letscms

Hello Sir, I’m a senior full-stack developer with 12+ years of experience and strong expertise in React (TypeScript) and Node.js backends. I specialize in stepping into existing SaaS codebases and completing execution-phase work without disrupting established architecture. Your stack (React TS, Fastify, PostgreSQL with Prisma, AWS SES/S3, Google APIs) aligns perfectly with my experience. I’m comfortable refining UI, implementing and stabilizing business features like referral systems, improving admin panels, fixing bugs, and preparing applications for production readiness. I strictly follow existing architecture, maintain clean Git workflows, and work efficiently in milestone-based deliveries with responsive communication. No rewrites — only structured, high-quality execution. I can start immediately and ensure fast, reliable turnaround on defined tasks. Best Regards Jitendra Sharma

@yuliussmayoru

Hello, I’m a senior full-stack developer with extensive experience in React + TypeScript, Node.js (Fastify), and PostgreSQL (Prisma). I specialize in working with existing codebases, following established architecture, and delivering high-quality, maintainable code without full rewrites. I’ve worked on SaaS applications with admin dashboards, referral systems, API integrations (Google APIs, AWS SES/S3), and production deployment on cloud platforms like DigitalOcean and AWS. I’m comfortable with milestone-based work, responsive communication, and fast turnarounds. Based on your project description, I can help complete the UI updates, refine referral features, improve admin pages, fix bugs, and stabilize production while maintaining code quality and project structure. Availability: 20–30 hours/week (flexible for faster delivery) I’m ready to start immediately and help bring your SaaS project to production-ready quality efficiently. Looking forward to collaborating.

@nitishk277

Hey, im a full-stack developer with strong experience in React (TypeScript), Node.js, PostgreSQL (Prisma), and AWS services. I have worked on SaaS projects where the foundation was already built and my role was to complete features, refine UI, fix production bugs, and stabilize the system without changing the core architecture. Since your backend, auth, and deployment are already in place, Ill focus on clean UI updates, referral logic refinement, admin improvements, and structured bug fixingstrictly following your existing architecture and Git workflow. I’m comfortable working milestone-based and inside established codebases. -My availability per week: 30-35 hrs -My expected rate: $8--$10/hr USD I would like to connect with you in chat to discuss more about the task on which I will going to work. Let's connect. Thanks!

@prajpatil

With over 14 years working as a Full-Stack Developer, I bring an extensive skillset and a wealth of experience to the table. I have in-depth knowledge of each component of your project's stack including React, TypeScript, Fastify, Node.js, and PostgreSQL. In addition to the required technical skills, I also possess strong problem-solving abilities which come in handy when tackling the remaining work that your SaaS platform needs. One thing that sets me apart is my track record of working efficiently within existing codebases. I understand the value of following established architectures and ensuring clean code structures that are easy to maintain. My proficiency with Git allows for efficient collaboration without any disruptions. Tasks will be broken down into specific milestones, executed with precision, and delivered within agreed timelines. As your professional partner, rest assured I'll bring my vast experience to bear on your project’s needs and exceed your expectations from start to finish. Let’s build something amazing together!

@Azursol

Hello,! I’m excited about the opportunity to help with your project. Based on your requirements, I believe my expertise in Node.js, PostgreSQL aligns perfectly with your needs. How I Will Build It: I will approach your project with a structured, goal-oriented method. Using my experience in Node.js, PostgreSQL, Git, Full Stack Development, Google APIs, DigitalOcean, SaaS, I’ll deliver a solution that not only meets your expectations but is also scalable, efficient, and cleanly coded. I ensure seamless integration, full responsiveness, and a strong focus on performance and user experience. Why Choose Me: - 10 years of experience delivering high-quality web and software projects - Deep understanding of Node.js, PostgreSQL and related technologies - Strong communication and collaboration skills - A proven track record — check out my freelancer portfolio. - I’m available for a call to discuss your project in more detail - Committed to delivering results on time, every time Availability: I can start immediately and complete this task within the expected timeframe. Looking forward to working with you! Best regards, Ali Zahid Philippines

@toriquldev123

Hello Dear! I write to introduce myself. I'm Engineer Toriqul Islam. I was born and grew up in Bangladesh. I speak and write in English like native people. I am a B.S.C. Engineer of Computer Science & Engineering. I completed my graduation from Rajshahi University of Engineering & Technology ( RUET). I love to work on Web Design & Development project. Web Design & development: I am a full-stack web developer with more than 10 years of experience. My design Approach is Always Modern and simple, which attracts people towards it. I have built websites for a wide variety of industries. I have worked with a lot of companies and built astonishing websites. All Clients have good reviews about me. Client Satisfaction is my first Priority. Technologies We Use: Custom Websites Development Using ======>Full Stack Development. 1. HTML5 2. CSS3 3. Bootstrap4 4. jQuery 5. JavaScript 6. Angular JS 7. React JS 8. Node JS 9. WordPress 10. PHP 11. Ruby on Rails 12. MYSQL 13. Laravel 14. .Net 15. CodeIgniter 16. React Native 17. SQL / MySQL 18. Mobile app development 19. Python 20. MongoDB What you'll get? • Fully Responsive Website on All Devices • Reusable Components • Quick response • Clean, tested and documented code • Completely met deadlines and requirements • Clear communication You are cordially welcome to discuss your project. Thank You! Best Regards, Toriqul Islam

@sumipundir01

Hi, Your availability per week: (Monday–Saturday ) Your expected rate: 8 I have completed many projects as MERN Stack. I can do this job very well according to your need. I will start immediately Thanks

@chiragardeshna

Hi there, You don’t need redesign. You need disciplined execution inside an existing architecture without breaking what already works. That’s the kind of stabilization and feature-completion work I regularly handle. I have strong experience with React + TypeScript frontends and Node.js backends, working within established Prisma/PostgreSQL schemas and production deployments. I’m comfortable refining UI components, tightening referral logic, improving admin flows, and resolving bugs while maintaining existing patterns and Git structure. I focus on small, controlled milestones with clean commits and minimal regression risk. I reduce risk by reviewing the current codebase first, aligning on conventions already in place, and implementing changes incrementally with clear testing at each step. No rewrites, no architecture disruption, just structured completion and stabilization. Availability: 30–40 hours per week for fast turnaround. Rate: Competitive and flexible depending on scope and timeline. I’m ready to begin immediately and align on the first milestone. Regards, Chirag

@royalwebraisers

Hi, As per my understanding: Finish existing SaaS app—UI updates in React/TS, refine referral feature, improve admin pages, bug fixes, production stabilization on Fastify/Node/Prisma/PostgreSQL/AWS, following current architecture, milestone-based. Implementation approach: - Dive into codebase, update React UI components for polish; refine referral logic via backend endpoints and frontend hooks. - Enhance admin pages with TS types; squash bugs, optimize Prisma queries, stabilize DO deployment. - Git commits per milestone; 5-7 day turnaround. Queries: Weekly availability? Hourly rate or milestone budget? Git repo access details? I will share my portfolio on your first message. Regards

@ominfowave

Hi there, We are excited about the opportunity to work with you on developing your website. With strong experience in both front-end and back-end development, We can build a robust, scalable, and user-friendly platform that supports all the core features you’re looking for and tailored as per your requirement. Why Us? • 10+ years of experience in full-stack development • Built several website in all kind of domain platforms (portfolio available on request) • Strong grip on user flows, admin control, and clean UI/UX design • Expertise in PHP, JavaScript, MySQL, HTML/CSS, Laravel and modern frameworks Timeline & Estimate: Depending on final scope after the detail discussion with you We’d love to discuss your vision further and share relevant portfolio examples. Let’s build something powerful together! Looking forward to your response. Best regards, Vishal Nasit

@juanestebana17

Hi,\nI am an experienced full-stack developer with a strong background in React and Node.js, making me well-equipped to implement your UI updates and core business features for the SaaS platform. I understand the importance of timely execution and maintaining existing architecture while delivering high-quality code.\nCould you please elaborate on your timeline expectations for these milestones?

@Srashtasoft

Hi there, I have read your project requirement carefully. You need a strong full-stack developer to complete execution work on an existing SaaS application built with React, Fastify, PostgreSQL, and integrated with AWS (SES, S3) and Google APIs. The architecture is already in place, and the focus is on UI updates, referral feature refinement, admin improvements, bug fixing, and production stabilisation, strictly following the current structure without rewrites. We can support you with: ===================== • React + TypeScript UI refinement and component cleanup • Fastify backend feature completion • Prisma query optimisation and bug fixing • Referral logic enhancement within existing architecture • Admin panel improvements • Production stabilisation and edge-case handling • Clean Git-based milestone workflow We are comfortable working inside mature codebases, following established patterns, and delivering in structured, small milestones with responsive communication. Availability: 40–45 hours per week (can increase temporarily for urgent milestones) Rate: $10–15/hour depending on complexity and timeline (or milestone-based pricing if preferred) Questions: ========== Is there an active staging environment for testing before production deploys? Are there automated tests already in place? Is the referral system logic partially implemented or needing extension? What is your target timeline for production stabilisation? Best Regards, Srashtasoft Team

@Microlent

Hello, this fits perfectly with my experience working inside active SaaS codebases and pushing them to production stability without rewriting architecture. Since your backend, auth, and schema are stable, I’ll focus on clean execution and alignment with your existing structure. How I’ll Approach This • Review current React + Fastify structure before touching any logic • Implement UI refinements using existing component patterns • Refine referral flows with proper validation and edge-case handling • Improve admin pages while preserving architectural conventions • Clean up bugs and tighten error handling • Ensure production readiness with structured logging and testing I’m comfortable working milestone-based and following strict Git workflows with clean, incremental commits. Availability: 30–40 hours per week Rate: Flexible depending on scope and milestone size I understand this is execution, not redesign, and I will respect the existing architecture. Let’s open the chat. I can review the repo structure and confirm milestone breakdown before we begin. Best, Jenifer

@natanr28

HELLO, HOPE YOU ARE DOING WELL! I understand that you're looking to complete an existing SaaS web application with UI updates and core feature implementations. My skills in React and TypeScript, combined with my backend experience in Node.js, make me perfectly suited for this project. I plan to dive into the existing codebase to enhance the UI, refine the referral feature, and improve the admin pages while ensuring code quality and structure remains intact. 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.

@rahul8696

Hi there! I’d love to help you complete and stabilize your existing SaaS application built with React (TypeScript) and Fastify (Node.js). With strong experience working inside established codebases and shipping milestone-driven features, I can focus purely on execution — refining UI, tightening business logic, and preparing the platform for production without disrupting your existing architecture. Couple of questions: Are you using a component library (MUI, AntD, custom design system)? Is Prisma schema fully frozen, or are minor adjustments expected? Are referrals event-driven (webhook/queue) or handled synchronously? Do you have staging + production branches separated already? Are automated tests currently in place? I'm confident in delivering structured, clean commits within your existing architecture, handling UI refinements, referral logic improvements, admin enhancements, bug fixes, and production stabilization — all milestone-based with responsive communication. Feel free to review my past work here: https://www.freelancer.com/u/rahul8696 Looking forward to helping you push this SaaS to production-ready quality.

@RajAbhisek

Hi, I'm Raj, a full-stack developer, and I've worked on similar SaaS projects before. I understand you need someone to jump into an existing codebase and complete the remaining UI and feature work without disrupting what's already built. That makes sense, and I can definitely help with that. I've spent good time working with React + TypeScript on the frontend side, and Node.js/Fastify on the backend. I'm comfortable with PostgreSQL, Prisma, and integrations like AWS services and Google APIs. More importantly, I've worked inside existing codebases multiple times where the foundation is solid and you just need someone to execute the remaining tasks cleanly. That's the kind of work I do well. From what I read, your project structure, authentication, and database are already locked in. I can pick up the UI updates, referral feature refinement, admin page improvements, and bug fixes without trying to change things that don't need changing. I follow clean Git practices and can work in small milestones the way you want to operate. I'm available to start and can move fast on this. I'm available 40 hrs a week. Let's discuss the details on chat—the timeline, which tasks to prioritize first, and what you need from me week to week. Looking forward to working on this. Raj Abhisek Panda