You will get Full Stack Developer - MVP SaaS (solo or team) Next.js + Node.js + React.js
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Project details
As a Full Stack Developer, react developer and web developer I build production-ready SaaS MVPs - solo or with my team. 40+ projects, 100000+ users on a single platform, average MVP in 3-5 weeks.
Full cycle as a backend developer and saas developer: discovery, API, frontend, billing (Stripe), deployment. Working MVP ready to demo: authentication, RBAC, core flows, admin basics, payments/subscriptions, solid foundation for scaling. Experience shipping MVPs quickly, from the ground up or existing codebase.
Stack: Next.js, React.js, Node.js, NestJS, TypeScript, PostgreSQL. Optional: AI (LLM/RAG), webhooks, n8n, API integrations.
Keywords: full stack developer SaaS, full stack developer MVP, full stack developer React, full stack developer Node.js, full stack developer web application, full stack developer API, full stack developer startup, react developer SaaS, react developer MVP, backend developer SaaS, backend developer Node.js, web developer SaaS, web developer MVP, saas developer MVP, saas developer Stripe, senior web developer, full stack developer TypeScript, full stack developer RBAC
Full cycle as a backend developer and saas developer: discovery, API, frontend, billing (Stripe), deployment. Working MVP ready to demo: authentication, RBAC, core flows, admin basics, payments/subscriptions, solid foundation for scaling. Experience shipping MVPs quickly, from the ground up or existing codebase.
Stack: Next.js, React.js, Node.js, NestJS, TypeScript, PostgreSQL. Optional: AI (LLM/RAG), webhooks, n8n, API integrations.
Keywords: full stack developer SaaS, full stack developer MVP, full stack developer React, full stack developer Node.js, full stack developer web application, full stack developer API, full stack developer startup, react developer SaaS, react developer MVP, backend developer SaaS, backend developer Node.js, web developer SaaS, web developer MVP, saas developer MVP, saas developer Stripe, senior web developer, full stack developer TypeScript, full stack developer RBAC
Programming Languages
HTML & CSS, JavaScript, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included $8,000
These options are included with the project scope.
$8,000
- Delivery Time 30 days
- Number of Revisions 0
- Source Code
Frequently asked questions
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ZO
Zack O.
May 18, 2026
Full Stack Engineer
Vitalii and his team have been amazing and very thoughtful. From technical skills to leadership and assistance with our project, everything has been very positive. I highly recommend them for your next project.
LR
Lou R.
Mar 9, 2026
Frontend Engineer to Build MVP from Scratch (React + TypeScript + Payments)
DJ
David J.
Jun 29, 2025
MVP Product for Startup in AI x Messaging x Crypto
Excellent developer. Responsive, writes quality code, and capable of learning new things quickly.
SM
Seva M.
Jan 30, 2025
SaaS application development | NodeJS, React, Express, API integration
My experience working with Vitalii was very good. Tasks were completed quickly, with a high level of quality. Vitalii was involved in working on many elements of our platform: frontend, backend, browser extension.
I would like to highlight the flexibility with which Vitalii responded to changes in the project. He adapted seamlessly to changes in the scope of work, code style requirements, and process organization, quickly aligning with the evolving dynamics of the team. This is critical for the start-up context.
He was constantly learning and improving their performance.
I would like to highlight the flexibility with which Vitalii responded to changes in the project. He adapted seamlessly to changes in the scope of work, code style requirements, and process organization, quickly aligning with the evolving dynamics of the team. This is critical for the start-up context.
He was constantly learning and improving their performance.
About Vitalii
Full Stack Developer | React Node.js | SaaS Developer | Next.js
100%
Job Success
Zaporizhzhya, Ukraine - 3:42 pm local time
I’m a senior full-stack developer building B2B SaaS, multi-tenant products, marketplaces, internal tools, and AI-powered product features. As a full-stack developer, I design backend + frontend together so the platform stays clean, secure, and scalable from MVP → v1 → growth.
🤝 Working model (solo or team)
You work with an engineer from our team on Upwork - no unnecessary bureaucracy.
Need one full-stack developer - we’ll assign the best fit. Need a team - we’ll scale with the right people.
🧩 What I build as a full-stack developer (SaaS, MVP, B2B platforms)
As a full-stack developer, I ship:
* B2B SaaS platforms & multi-tenant products (subscriptions, RBAC, teams)
* MVPs that can grow into v1 without rewrites
* Marketplaces & booking platforms (catalog, vendors, inventory, payments, commissions)
* Internal tools, admin dashboards, back-office systems
* Customer/partner portals with role-based access
* Data-heavy apps (workflows, forms, filtering, reporting)
If you’re hiring a full-stack developer because this is a real platform (users + data + business logic), that’s exactly my lane.
⚙️ Full-stack developer coverage (backend, APIs, data, security)
As a full-stack developer, I cover:
* Architecture: modular monolith by default; microservices only when justified
* APIs: REST, webhooks, clear contracts for frontend/partners
* Integrations: Stripe/Stripe Connect, PayPal, CRMs, email, third-party APIs
* Data: PostgreSQL/MySQL schemas, migrations, indexing, performance tuning
* Security: JWT/sessions, RBAC/permissions, rate limiting, audit logs
* Stabilisation: refactors, tests, regression reduction, reliability improvements
You get a full-stack developer who can build new features and keep the codebase maintainable.
🤖 AI / LLM features (product-grade, not demos)
As a full-stack developer, I implement AI features that actually fit into a SaaS product:
* LLM integration (OpenAI or similar) for summarisation, extraction, classification, routing
* Embeddings + RAG-style retrieval over docs/knowledge bases/internal data
* AI assistants inside the product (support, onboarding, internal ops tools)
* Prompt/version management + safe fallbacks (so the feature doesn’t break the product)
If AI doesn’t add ROI, a good full-stack developer keeps the solution simple and stable.
🛠 Tech stack (focused)
Frontend
* React, Next.js, TypeScript, Tailwind / component systems
Backend
* Node.js, NestJS, Express
Data
* PostgreSQL, MySQL, MongoDB, Redis
AI
* LLM integrations, embeddings, RAG pipelines
Delivery
* Docker, CI/CD, AWS (EC2/ECS/RDS/S3)
🔄 How I work (SaaS/MVP delivery)
Working with me as your full-stack developer:
* Quick discovery (goals, users, constraints, integrations)
* MVP scope → clear milestones → predictable releases
* Clean code, docs, and stable handoff-ready setup
* Long-term support and iteration after launch
✅ When we’re a good match
* You need a full-stack developer for SaaS/MVP work (multi-week product delivery)
* You want ownership across frontend + backend + integrations
* You need AI/LLM features implemented like product features, not a hacky demo
* You care about readable code and long-term maintainability
Last updated: 31 May 2026
Steps for completing your project
After purchasing the project, send requirements so Vitalii can start the project.
Delivery time starts when Vitalii receives requirements from you.
Vitalii works on your project following the steps below.
Revisions may occur after the delivery date.
Kickoff + scope lock
Confirm goals, MVP flows, success criteria, and what’s in/out. Review any existing Figma/docs/repo/examples
Architecture + setup
Project scaffolding, environments, API structure, auth/RBAC approach, baseline UI layout, CI/CD basics.