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Senior Full-Stack Developer | Short Contract (4 weeks, remote) We're building an AI-native B2B SaaS platform and need an experienced full-stack developer to connect existing mock UIs to real data. The frontend is built, the designs are done. This is about wiring everything up properly. This is an AI-native codebase. Claude Code is the primary development tool, not an afterthought. We're looking for someone who already works this way: using AI to write, scaffold, and review code as a matter of course, not as a novelty. If that's not how you work, this isn't the right contract. The work: Connect mock UIs to live API calls across multiple user dashboards Integrate Clerk authentication with correct role-based access (5+ distinct user personas) Work within an established [login to view URL] 16 / TypeScript monorepo (Turborepo) Query and shape data from MongoDB Maintain existing component library (shadcn/ui, Radix UI) You must have: 3+ years writing strict TypeScript, naturally, not reluctantly [login to view URL] App Router fluency: RSC, Server Actions, middleware MongoDB: schema design, aggregation pipelines, indexing Auth: JWT, session management, claims-based access control Genuine hands-on AI development experience, Claude Code specifically preferred Self-directed: you will be working closely with a solo founder, not a dev team Strong plus: Vercel AI SDK v4, streaming, tool use Recharts or similar Railway deployment Important: You will do a short live technical screen before engagement. Applications from agencies or teams will not be considered. We need the person doing the work to be the person we speak to.
Project ID: 40470085
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231 freelancers are bidding on average €40 EUR/hour for this job

Hi, I came across your project "Full-stack Developer for AI-native SaaS Platform" and I'm confident I can help you with it. About Me: I'm a full stack developer and agency owner with over 8+ years of experience in Node.js, Full Stack Development, AngularJS, MongoDB, Next.js. , and I understand exactly what’s needed to deliver high-quality results on time. Why Choose Me? - ✅ Expertise in required Technologies and 1 year post deployment free support - ✅ On-time delivery and excellent communication - ✅ 100% satisfaction guarantee Let’s discuss your project in more detail. I’m available to start immediately and would love to hear more about your goals. Looking forward to working with you! Best regards, Deepak
€36 EUR in 40 days
5.1
5.1

Hi As a seasoned full-stack developer with over a decade of experience in building top-notch digital solutions, I understand the intricate balance between an efficient backend and an intuitive frontend. My extensive portfolio includes scalable web applications, CRM systems, ERPs, and eCommerce platforms - all of which align well with the nature of your project. What sets me apart from other candidates is not just my technical expertise in Java, AngularJS, and Node.js (which I assure you are profoundly strong), but also my unique understanding of AI development using the Claude Code tool. My team and I always prioritize AI as an essential aspect rather than a novelty inclusion. We consistently use AI to write, scaffold, and review our code effectively - something we'll seamlessly integrate into your platform. Moreover, our experience working with complex databases such as MongoDB and implementing secured authentication systems like Clerk add extra value to our candidature. We can efficiently connect your mock UIs, ensure proper API integration across different user dashboards (including role-based access for various personas), shape data from MongoDB via aggregation pipelines while maintaining existing component libraries like shadcn/ui or Radix UI. Given that I personally steer all of our projects, rest assured you'll be working directly with the person responsible for delivering successful results on time and within budget. Thanks....
€36 EUR in 40 days
5.4
5.4

Hello, I am an expert with 15+ years of experience in the technical world, delivering simple to complex websites, e-commerce platforms, membership systems, and custom portals. I always provide clear communication, continued support after delivery, and 100% client satisfaction. I specialize in Node.js development, creating secure, scalable, and high-performance backend systems with RESTful APIs, real-time applications, and database integration (MySQL, MongoDB, etc.). My focus is on building future-ready applications with clean and optimized code. If you are looking for a dedicated Node.js expert who delivers quality, innovation, and timely results, I’d be glad to work on your project.
€36 EUR in 40 days
5.2
5.2

Hello, I hope you are doing well. I understand that you are looking to build a B2B SAAS PLATFORM, and I would be happy to help. I have extensive experience in designing and developing applications and have successfully delivered many projects. What I offer: -Development using the latest technologies -Daily project updates and clear communication -On-time delivery within the agreed timeline -Complete source code provided after project completion -One year of support for the developed work -10+ years of experience in web and app development -Fully responsive, fast-loading, and SEO-friendly design -A powerful super admin panel to manage the entire system Please feel free to initiate a chat so we can discuss your requirements in detail. Thank you and regards, Dheeraj K.
€36 EUR in 40 days
4.8
4.8

Hello There, Hope you are doing well :) We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time. Thank you
€36 EUR in 40 days
4.1
4.1

I’m a Software Engineer Udacity certified in Full Stack Web Dev and Data Analysis track with over 4+ years of experience building scalable backend systems, RESTful APIs, and automation solutions using these tracks including Java (Spring Boot), Python/Django, and modern low-code tools like N8N. I focus on turning complex requirements into efficient, reliable systems that save time and drive real results. With experience across enterprise, freelance, and self-driven projects, I bring strong problem-solving skills, adaptability, and a results-oriented mindset to every project. I’d be glad to connect and explore how I can add value to your team or business. Check my profile : https://www.freelancer.com/u/haitham1996?frm=haitham1996&sb=t
€36 EUR in 40 days
3.6
3.6

I already work the way you described: Claude Code + Cursor for 90% of my dev cycle. I scaffold with Al, iterate with Al, and review diffs with Al. No boilerplate, no manual plumbing. You get production code, fast. For your 4-week contract, I'll: Connect your existing mock Uls to real backend data and auth 2. Build out the API layer, data models, and service integration 3. Set up proper error handling, loading states, and optimistic UI 4. Add tests + docs generated via Claude, reviewed by me 5. Ship daily, with Claude Code commit summaries
€36 EUR in 40 days
0.0
0.0

Dear Client, Thank you for posting this project. I have extensive experience in AI. I'm confident I can deliver high-quality results: - Technical expertise: Proven track record with similar automation projects - Timeline: Efficient delivery with minimal delays - Support: Full testing and debugging included I'm ready to start immediately and am flexible with communication. I would appreciate the opportunity to discuss your specific requirements in detail. Best regards, Petrovich
€250 EUR in 7 days
0.0
0.0

Saya adalah seorang programmer muda yg masih bersekolah tetapi saya dapat membantu membuat project anda dengan baik berdasarkan pengalaman saya
€36 EUR in 40 days
0.0
0.0

Hello, I can help you turn your AI-native SaaS frontend into a fully working product by connecting the UI to real data, authentication, and backend logic in a clean and scalable way. How I’ll approach it 1. Wire frontend to backend • Connect all existing mock UIs to live API endpoints • Implement real data flow across dashboards • Ensure consistent data handling across the app 2. Authentication & access control • Integrate Clerk authentication • Set up role-based access for multiple user types • Secure routes and protect sensitive areas 3. Data layer integration • Work with MongoDB for structured queries and aggregation • Optimize schema and indexing for performance • Ensure clean data shaping for frontend use 4. SaaS core functionality • Complete user dashboard logic and interactions • Implement state handling for real-time updates • Ensure smooth navigation across roles and features 5. Stability & polish • Refactor where needed for maintainability • Ensure clean TypeScript usage across the monorepo • Validate performance and responsiveness What you get • Fully functional AI SaaS platform (frontend connected to real backend) • Secure authentication and role-based system • Stable data layer with MongoDB integration • Production-ready, maintainable codebase Best Regards
€36 EUR in 40 days
0.0
0.0

I am an Oracle certified Java professional with 8 years of experience in designing and developing Web and Enterprise applications. I specialize in Java, Spring Boot, Microservices, Hibernate, RESTful services, SQL (Oracle), Kafka, and cloud-ready architectures. Throughout my career, I have worked on end-to-end development—from requirement analysis and design to deployment and production support. My experience spans building microservices, improving system performance, implementing robust logging strategies, and integrating CI/CD pipelines using Docker, Jenkins and Kubernetes.
€36 EUR in 40 days
0.0
0.0

Having designed and developed highly scalable, API-driven platforms with a similar stack to your project for over three years now, I am confident in my ability to connect your front-end to real data promptly and seamlessly. Although my past projects have primarily been Django-based, I have a strong understanding of FastAPI patterns. My experience with JWT/OAuth authentication flows will enable me to integrate Clerk authentication effectively - ensuring correct role-based access across various user personas. What sets me apart is my genuine appreciation for clean code and stable performance under heavy loads which perfectly aligns with your reliability-first approach. Whether it's utilizing containerization with Docker for secure deployments or optimizing SQL queries for efficient data retrieval, I'm constantly pushing myself to deliver top-notch solutions. Furthermore, I’m comfortable working in remote settings, communicating proactively as necessary, and taking full ownership of tasks, exactly what you need working closely with a solo founder. I genuinely believe that my versatility as a developer coupled with my commitment to delivering reliable and high-quality work under tight deadlines make me an ideal fit for this project. Given the chance, I can ensure that your AI-native B2B SaaS platform sees a rapid and smooth progression from design to deployment. Let’s discuss this further and get started on building an exceptional product together!
€36 EUR in 40 days
0.0
0.0

I use Claude Code daily as my primary development tool, not occasionally, not to look good in proposals. It's genuinely how I write, scaffold, review, and refactor code. So when I read your requirement, I knew this was worth applying for. Coming to your actual work, I'll start by mapping each mock UI screen to its corresponding API endpoint and data shape in MongoDB, then build Server Actions and RSC-compatible data-fetching layers cleanly inside the Turborepo structure. For Clerk, I'll configure JWT claims per persona (5+ roles), set up middleware-level route protection, and ensure each dashboard only surfaces data relevant to that role. I'll keep shadcn/ui and Radix UI components untouched structurally and just feed them real data — no unnecessary refactoring. If this resonates, let's schedule a quick 10-minute call, I'm ready to jump into the codebase fast and deliver within the 4-week window. Abhishek Jha
€36 EUR in 40 days
0.0
0.0

Hello, I have worked Claude, MongoDB, TypeScript and Node.js in a few projects. This project sounds very interested and I would like to speak with the solo founder to discuss further. Ready to start immediately. Regards, Stefany M.
€36 EUR in 40 days
0.0
0.0

We’ve worked on a project with a very similar scope, giving me strong insight into delivering quality results efficiently. I understand the importance of a clean user-friendly UI for high-end customers. I'd love to chat about your project and how we can collaborate to achieve your goals. Let's connect for a free consultation. Regards, Nabeel Ismail
€36 EUR in 7 days
0.0
0.0

“This feels like a project where clarity and execution really matter.” I understand the critical need to seamlessly connect mock UIs to real data for your AI-native B2B SaaS platform. My expertise lies in precisely the integration and wiring up you require. While I am new to freelancer, I have tons of experience and have done other projects off-site. With a focus on clean code, robust authentication, and efficient data querying, I'm confident in my ability to deliver results that align with your vision. Let's work together to ensure a professional, user-friendly experience for your users. I would love to chat more about your project! Regards, Tiaan
€36 EUR in 7 days
0.0
0.0

Hi I have 20 years in building apps, including build SaaS Projects. You can view my linkedin for more details (/in/msytnadeem) If you want i am happy to go into a call and give you a see the project and i will do an evaluation with 4 timelines Timeline 1: first prototype so you could confirm on the approach ( no payment) Timeline 2 : full implemented SaaS project (50% payment) Timeline 3 : 4-8 weeks in continous enhanncments and feedback (30% payment) Timeline 4: deployment on server, code sharing , full delivery (20% payment)
€36 EUR in 40 days
0.0
0.0

Lisbon, Portugal
Member since May 20, 2026
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