Sourabh S.

Full-Stack SaaS Engineer | Next.js, Node.js, AWS & AI

I build production SaaS products, not just prototypes. two SaaS platforms i've worked on now generate approximately $7K in combined monthly recurring revenue. on upwork, I'm top rated with a 100% job success score, 270+ hours completed, and repeat clients for AWS/backend work. I usually work with founders and product teams that need someone who can take ownership across more than one layer of the application. that includes building a SaaS product from scratch, extending an existing platform, fixing production issues, integrating third-party services, or taking an MVP that works and making it reliable enough for real customers. My main stack is: typescript / javascript next.js / React node.js postgreSQL / Prisma AWS REST APIs and webhooks authentication and role-based access payments and subscriptions CI/CD and production deployment openAI / LLM integrations Selected production work: 1. Legacis Capital- legaciscapital. com built and maintaing a financial SaaS platform covering customer onboarding, authentication, KYC workflows, risk profiling, subscriptions, payments, digital agreements, notifications, admin workflows, and production infrastructure. The product currently generates approximately $5K MRR. I worked across the frontend, backend, PostgreSQL database, third-party integrations, payments, deployment, and ongoing production support. 2. Market Capsule marketcapsule. in built and maintaining a paid financial research/content platform with authentication, OTP workflows, payments, content management, backend integrations, and production deployment. this platform generates approximately $2K MRR and has handled high-volume paid launches. 3. AI Flavoured bytesteelcloud. com/case-studies/ai-flavoured/ built an AI-powered web application combining document summarization, image generation, voice generation, and other generative-AI workflows. this gave me practical experience integrating AI APIs into a complete user-facing product rather than building isolated demos. AWS & backend work My recent Upwork engagements have been heavily focused on AWS and backend engineering. I've worked with: AWS Lambda, API Gateway, SAM, cloudformation, IAM, RDS/Aurora, S3, CloudFront, CI/CD, node.js APIs, postgreSQL and production infrastructure. permission based resources and access. One AWS client hired me again after our first engagement. I'm particularly comfortable joining an existing system, understanding how the application and infrastructure fit together, and solving problems without unnecessarily rewriting everything. I can help when you need to: - build a SaaS/MVP from architecture through deployment - add substantial features to an existing product - build node.js / typescript APIs and backend services - design PostgreSQL schemas and application workflows - implement authentication, subscriptions and payments - integrate third-party APIs and webhooks - add openAI/Claude/LLM features to an existing application - troubleshoot AWS and production infrastructure - improve an MVP before real customers start using it - take ongoing technical ownership of a SaaS product If you already have a product, send me the current stack and the problem you're trying to solve. If you're starting something new, tell me what the product needs to do. I'll tell you how I would approach it and whether I'm a good fit.