React
9 min readHow React Context actually works: create a provider, read it with useContext, avoid the re-render trap, and know when Context beats Redux and when it loses.
Chamikara Nayanajith
AI First Full-Stack Engineer
Available for work
About Me
I'm Chamikara Nayanajith, an AI first full-stack engineer from Sri Lanka. With over nine years of experience, I work across the stack: React and Next.js interfaces, Node.js and TypeScript services, PostgreSQL and MongoDB data layers, and the AWS and Docker infrastructure that keeps them running. For most of that time I have also led and mentored the teams doing the work.
AI first is how I work, not a label I picked up. AI helps me plan, shape architecture, write code, debug, test, and document, so features ship sooner and I spend more of the day on the problems that actually matter. It also ships inside what I build: LLM-powered features, retrieval-augmented generation (RAG), vector search, and agents that quietly handle the repetitive work. Code is my craft, AI is my multiplier, impact is the goal.
Away from the browser I build ESP32 and IoT projects, most of them tied into Home Assistant to automate things around the house. I have written Solidity contracts for EVM chains too. Different tools, same habit of taking an idea from concept through architecture to something that actually runs. Have a look at my projects and my resume, read the blog, or get in touch if you have something you want built.
What I Do
AI First Engineering
AI in how I work and in what I ship: LLM integration, RAG pipelines, and AI agents that handle the repetitive work.
Full-Stack Product Engineering
React and Next.js on the surface, Node.js APIs underneath. One person following a feature from sketch to production.
Data Modeling & Search
PostgreSQL and MongoDB schemas that stay clean as they grow, plus vector search for when meaning matters more than exact matches.
Cloud & Delivery
AWS, Docker, and Vercel, with CI/CD pipelines that turn deploying into a non-event.
Connected Hardware & IoT
ESP32 projects and smart home automation, usually wired into Home Assistant and then left to run on their own.
Smart Contracts & Web3
Solidity smart contract development on EVM chains, tested with Hardhat and wired into the front end.
Leading & Mentoring Teams
Technical direction, honest code review, and mentoring that keeps quality steady as the team grows.
Latest Writing
Tutorials, guides, and lessons from building with React, TypeScript, and modern frontend tooling.
React
9 min readFetch data in React without the usual bugs: race conditions in useEffect, AbortController cleanup, and what SWR and TanStack Query actually cache for you.
React
8 min readPoll APIs in React with TanStack Query. Set up refetchInterval, add conditional polling and dynamic intervals, and avoid common performance pitfalls.
What Clients Say
Trusted by innovative companies and startups worldwide
"From planning to launch, the process was seamless and professional. The attention to detail and quality of work significantly improved how we present our business. The design and structure make it easy for customers to understand our services, resulting in better overall engagement."
DGUNS
D G Udesh Nuwan Siriwardhana
Managing Director at DG Upali & Sons (Pvt) Ltd
"The "Astra Flow" AI automation tool transformed how we manage incoming support tickets. It reduced manual workload, improved response times, and increased our team's productivity by around 55%. The system is reliable, well-designed, and has made our support operations significantly more efficient."
MC
Michael Chen
Chief Technology Officer at HostJar
"New application has significantly improved how we produce visual content. The ability to generate AI models and apply our own clothing designs makes showcasing products far more efficient. Combined with high-quality image enhancement, the results look professional and are ready for use across marketing and digital platforms."
NC
NDA Client
"Samara Guest Inn has transformed our guest experience with the new website. The intuitive design and seamless booking process have increased bookings by 30% and reduced customer inquiries. The responsive and mobile-friendly interface has made it easy for guests to find and book accommodations."
RA
Ranjith Abeywickrama
Owner at Samara Guest Inn
Trusted by Growing Teams
Proud to work with amazing companies and startups
