$ whoami
Rahul Tank
Senior Full-Stack + GenAI Developer
$ cat tagline.txt
I build production web platforms and Generative-AI products end to end — from SSE streaming and RAG pipelines to the last pixel.
A bit about me
I'm a full-stack engineer with 5+ years shipping production web platforms across healthcare, supply chain, and automotive — usually somewhere in the seam between backend systems and the interface people actually touch.
Lately I've been building Generative-AI products end to end: hand-rolled SSE token streaming with no chat SDK, retrieval-augmented generation over pgvector, and Zod-validated structured output. I care as much about the grounding prompt that kills hallucinations as I do about the focus ring.
I ship from architecture to deploy with 90%+ test coverage and near-zero production regressions, and I like the parts of the job that aren't code too — turning ambiguous client requirements into specs, running demos, and mentoring the engineers around me. Off the clock I've contributed to 500+ technical articles for GeeksforGeeks.
Where I've worked
A few of the teams and problems I've spent real time on.
- Jul 2024 — Present·India
Senior Software Engineer @ Eluminous Technologies
- Enhanced a production web-automation platform with a 2-engineer team — pushed CAPTCHA solve rate past 95% across 100+ concurrent requests by iteratively optimising an integrated ML pipeline.
- Built reusable React components for a multi-module dental-clinic SaaS dashboard and integrated Twilio and Firebase, cutting average feature delivery time by 40%.
- Drove frontend stability on an RSPO-compliant palm-oil supply-chain platform — raised test coverage to 90% and took client-reported bugs from 4–5 per sprint to near-zero within 2–3 sprints.
- Worked directly with client stakeholders to turn ambiguous requirements into detailed specs, eliminating mid-sprint rework and shipping UI features on schedule across release cycles.
- React
- TypeScript
- Node.js
- Fastify
- Express
- Postgres
- Jan 2021 — Jul 2024·India
Senior Software Engineer @ The Gateway Group
- Worked full-stack on a cross-platform vehicle-aftersales platform serving 150+ organisational users — sole mobile engineer building the React Native app while also developing the Node/Express REST APIs over PostgreSQL to digitise technician workflows for approvals and job tracking and cut reliance on manual paperwork.
- Owned App Store and Google Play releases end to end — submissions, deployments, and resolving critical pre- and post-launch issues.
- Drove TDD adoption and mentored 3 junior engineers — slashing code duplication from 40% to under 5% and holding green SonarQube quality gates for 3+ consecutive quarters — and earned promotion to Senior Software Engineer through the internal GIFT fast-track program.
- Integrated camera capture, push notifications (FCM), and Microsoft Active Directory auth with zero critical regressions, and contributed to Angular web modules as the client-facing technical point of contact.
- React Native
- React
- Angular
- Redux
- TypeScript
- Node.js
- Express
- PostgreSQL
Featured work
A few things I've built recently. Each one taught me something worth keeping.
Scout — Autonomous AI Research Agent
An autonomous AI research agent that decomposes a question, searches the live web, and streams a synthesized, source-aware answer in real time.
- TypeScript
- React 19
- LangGraph
- Gemini
- Tavily
- Redis
- SSE
DocChat — RAG Assistant
A grounded RAG assistant that answers from your documents with citations — and a 0% hallucination rate on out-of-scope queries.
- React 19
- TypeScript
- Express
- Gemini
- pgvector
- Postgres
- SSE
AI Blog — Summaries & Q&A
A full-stack blog with AI summaries and Q&A that answers strictly from each article — streamed token-by-token with no chat SDK.
- React 19
- TypeScript
- Express
- Gemini
- SSE
Palm Oil Supply Chain — RSPO Compliance
Frontend for an RSPO-compliant palm-oil supply-chain platform — 90% test coverage and custom components for complex regulatory rules.
- React
- TypeScript
- Jest
- Monorepo
Tools I reach for
The technologies I'm most productive with — chosen for boring reliability as much as capability.
Frontend
13 tools
- React
- TypeScript
- JavaScript
- Zod
- React Native
- Angular
- Redux
- Zustand
- TanStack Query
- Tailwind CSS
- shadcn/ui
- React Router
- Vite
Backend
7 tools
- Node.js
- Express
- Fastify
- REST
- SSE Streaming
- Redis
- BullMQ
Generative AI
9 tools
- LLM APIs
- RAG
- AI Agents
- LangChain
- LangGraph
- LangFuse
- Embeddings
- Vector Search
- Prompt Engineering
Database
6 tools
- PostgreSQL
- pgvector
- Drizzle
- MongoDB
- MySQL
- Firebase
DevOps & Tooling
9 tools
- Git
- GitHub Actions
- CI/CD
- Docker
- AWS
- Puppeteer
- Playwright
- Jest
- GitHub Copilot
Education
Where the fundamentals came from.
B.Tech in Information Technology
Charotar University of Science and Technology
2017 — 2021CGPA: 8.64
Credentials & certifications
Verified credentials backing up the experience above.
Promoted to Senior Software Engineer
The Gateway Group — GIFT Fast-Track Program·
500+ Technical Articles Published
GeeksforGeeks·
Programming, Data Structures & Algorithms Using Python
NPTEL·
Let's build something
Have a role, a project, or just want to talk shop? My inbox is open — I usually reply within a day or two.