Roshan K.

Full Stack Developer | Next.js, NestJS,AWS-Certified SaaS & AI Builder

Full Stack Developer with 6+ years building production SaaS platforms, booking systems, CRM tools, and AI-integrated applications, end-to-end, from React/Next.js frontends, Nest.js/Node.js/FastAPI backend to the AWS infrastructure they run on. Recent work: → Leading full-stack architecture at Bingo Labs — owning cloud infrastructure, AI automation workflows, and the full product delivery cycle → Built multi-tenant SaaS CRM with RBAC, Stripe billing, and AWS-hosted infrastructure serving 200+ tenants from MVP to production → Delivered booking systems, real-time dashboards, and AI-integrated apps using LangChain, LangGraph, Claude, and OpenAI APIs → Designed and shipped CI/CD pipelines, Docker/Kubernetes deployments, and GitHub Actions workflows from scratch I'm not a developer who's "familiar with AWS" — I architect and operate it professionally. 9 AWS certifications (Solutions Architect, Developer, ML Engineer, Data Engineer, CloudOps) and 2 Oracle Cloud credentials mean I provision ECS clusters, write CloudFormation, wire Lambda pipelines, and run Terraform without a separate DevOps hire. What I build for clients: → Multi-tenant SaaS platforms with RBAC, real-time dashboards, and drag-and-drop customisation (ReactJS, NextJS) → Scalable REST APIs and microservices (NestJS, Express.js, FastAPI, Django) → High-performance Next.js frontends — Core Web Vitals, SSR/ISR, code splitting → AI-integrated apps: LangChain, LangGraph, OpenAI, Claude APIs → Payment systems: Stripe Connect, Razorpay, Khalti, eSewa → React Native mobile apps (iOS & Android) → Data engineering and ML pipelines (SageMaker, TensorFlow, Keras) Core stack: TypeScript · React · Next.js · NestJS · Node.js · Python · PostgreSQL · MongoDB · Redis · AWS · Docker · Kubernetes · Terraform If you need someone who owns the whole stack — not just a single layer — send me a message. I usually reply within a few hours. — — — — — — — — — — Full stack developer for SaaS platforms, booking systems, CRM tools, and AI applications. I take full stack developer saas builds from MVP to scale, full stack developer fintech work, full stack developer ecommerce platforms, full stack developer healthcare applications, full stack developer marketplace work, and full stack developer CRM integrations. Recent AI work includes full stack developer LLM features (OpenAI, Claude, LangChain, LangGraph) and full stack developer AI prototypes. Stack coverage: full stack developer react next.js, full stack developer nestjs node.js, full stack developer python fastapi django, full stack developer aws cloud, full stack developer docker kubernetes terraform. I handle python full stack developer flask and python full stack developer django engagements. Also .net adjacent full stack developer migrations when needed. I ship as a web developer, React developer, and mobile app developer — covering web developer, React developer, and mobile app developer work from one engagement saves clients two or three hires. I take web developer retainers and React developer contracts. full stack developer, full stack web developer, full stack developer saas, full stack developer fintech, full stack developer ecommerce, full stack developer healthcare, full stack developer crm, full stack developer marketplace, full stack developer ai, full stack developer llm, full stack developer react, full stack developer next.js, full stack developer nestjs, full stack developer aws, full stack developer cloud, python full stack developer, web developer, react developer, mobile app developer