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Yasowant Nayak
Full Stack Software Engineer · AI & LLM Apps
I build fast, scalable SaaS with React & Node.js — and ship AI features with LLMs, RAG and vector search. Scaled a multi-tenant platform to 8+ organizations, cutting page loads 40% and release time 50%.
Latest build:Esscentra Prep— AI study & interview-prep plannerLiveAbout Me
I'm a Full Stack Software Engineer with 3+ years building production SaaS on React and Node.js. I love turning complex problems into clean, scalable systems — and I've scaled a multi-tenant platform to 8+ enterprise organizations while cutting page loads 40% and release time 50%.
Download ResumeSystem Design & Scalability
REST / SOAP / GraphQL APIs
Multi-Tenant Architecture
CI/CD & Performance
Skills & Technologies
Backend-first full stack — Node.js services and APIs, React frontends, and now LLM-powered features with RAG, embeddings and agents.
Backend & APIs
Where I spend most of my time: designing APIs, multi-tenant data isolation, auth and the services behind them.
router.get("/api/:tenant/surveys", auth("jwt"), can("survey:read"), async (req, res) => res.json(await svc.list(req.tenant))) // 15+ REST, SOAP & GraphQL APIs shipped to production
Frontend
AI & LLM
NewDatabases
DevOps & Cloud
years shipping production SaaS for 8+ enterprise organisations
Contribution activity
github.com/YasowantLLMs, RAG & AI Agents
I build AI features the way I build everything else — typed, tested and fast. Retrieval-augmented generation keeps answers grounded in your data, and a clean Node.js backend keeps it secure and affordable.
How a RAG request flows
query → context → grounded answer- 1IngestPDFs, docs, DB rows
- 2Chunksemantic splits
- 3Embedvector embeddings
- 4Storepgvector / Pinecone
- 5Retrievehybrid top-k + rerank
- 6Generategrounded LLM answer
- 7Streamtoken-by-token UI
RAG chatbots on your data
Assistants that answer from your docs, tickets or database — with sources cited and no hallucinated facts.
Semantic & hybrid search
Embeddings + keyword (BM25) search with reranking, so users find what they mean, not just what they typed.
AI agents & tool calling
LLMs that call your APIs — create records, query data, trigger workflows — behind proper auth and RBAC.
AI features inside SaaS
Resume parsing, plan generation, summaries and smart defaults shipped into real products like Esscentra Prep.
Fast, streaming UX
Server-sent streaming, optimistic UI and caching so AI features feel instant instead of spinning.
Production guardrails
Prompt-injection defence, PII redaction, rate limits, cost tracking and evals before anything ships.
export async function answer(q: string) { // 1. embed the question const v = await embed(q); // 2. hybrid retrieve + rerank const docs = await db.search({ v, q, k: 8 }); const ctx = rerank(q, docs).slice(0, 4); // 3. grounded, streamed answer return llm.stream({ system: "Answer only from context. Cite sources.", context: ctx, question: q, });}Featured Projects
A selection of projects I've built with passion and precision
Esscentra Prep – AI Interview & Exam Prep Planner
A full-stack, AI-powered study planner that turns a resume or exam goal into a personalized, day-by-day plan scheduled around your real routine — tasks, streaks, analytics, reminders, and subscriptions included. Designed, built, and deployed end-to-end. Live in production at prep.esscentra.in.
Read the case studyHover or tap to see key features
Esscentra Prep – AI Interview & Exam Prep Planner
Key Features
- AI plan from a resume (PDF/image) or exam goal
- Tasks auto-scheduled into your real day & time slots
- Multiple roadmaps + auto catch-up for overdue tasks
- Streaks, activity heatmap & progress analytics
- In-app, desktop & nightly email reminders
- JWT auth, 7-day trial & tiered subscriptions
Survesy – Multi-Tenant Survey SaaS
A production-ready, all-in-one survey platform: build beautiful forms in minutes, share with a link, and watch responses turn into live charts — no spreadsheets, no setup.
Read the case studyHover or tap to see key features
Survesy – Multi-Tenant Survey SaaS
Key Features
- Drag-and-drop builder with multi-section surveys
- Conditional logic via a visual rules engine
- Real-time analytics: trends & completion rates
- 10+ question types with CSV / JSON export
- Role-based access & full audit logs
- Tiered subscriptions (Free → Premium)
SmaartQR – Emergency Response Platform
India's unified emergency-response platform — one scan connects citizens to verified, life-saving services 24/7, wherever they are. Live in production at smaartqr.com.
Read the case studyHover or tap to see key features
GrandReserve – Hotel Booking Platform
A modern hotel booking web application designed for performance, scalability, and a seamless guest experience from search to checkout.
Read the case studyHover or tap to see key features
GitHub Activity
Live, real-time data pulled straight from my GitHub profile — open source work, repositories, and contributions.
Freelance Services
Remote freelance developer for clients in India, the UK, the US, Europe and worldwide. Transparent local pricing, overlap with your time zone, and clean handoffs — let's build something amazing together!
Full Stack Web Development
End-to-end web applications built with React, Node.js, and modern databases — from schema to deployment.
- React + Node.js architecture
- Database design & REST/GraphQL APIs
- Auth, payments & third-party integrations
API Development & Integration
Robust REST & GraphQL APIs, third-party integrations, and clean microservices that scale.
- REST, SOAP & GraphQL endpoints
- Secure JWT + role-based access
- Stripe, payment & webhook integrations
Frontend & UI Engineering
Pixel-perfect, responsive, and accessible interfaces with smooth animations and fast load times.
- Responsive, mobile-first layouts
- Reusable, typed component libraries
- 40% faster loads via code splitting
Cloud, DevOps & CI/CD
Dockerized deployments and automated pipelines on AWS that ship features faster and more reliably.
- Docker + GitHub Actions pipelines
- AWS deployment & configuration
- 50% faster, repeatable releases
Technical Consultation
Architecture reviews, code audits, and hands-on technical guidance to keep your project healthy.
- Architecture & scalability review
- Code audit & performance profiling
- Best-practice & tech-stack guidance
MVP Development
Rapid prototyping to launch your idea fast — a production-ready MVP without cutting corners on quality.
- Idea to launch in weeks
- Scalable, production-ready foundation
- Clean handoff & documentation
My Journey
From electrical engineering roots to building modern, scalable SaaS — here's the path so far.
Software Developer
SPM Global Technologies
Led full-stack development of a multi-tenant SaaS platform serving 8+ enterprise organizations — driving architecture decisions, performance, and secure data isolation from design to production.
- Scaled the platform to 8+ enterprise tenants with strict, secure data isolation
- Cut page load times 40% via code splitting, lazy loading & memoization
- Shipped releases 50% faster with Dockerized CI/CD on GitHub Actions + AWS
- Reduced feature build time 35% with a reusable, typed React component library
- Architected 15+ REST, SOAP & GraphQL APIs secured with JWT and role-based access
Full Stack Developer
JSpiders – Training & Development Institute
Built mobile-first, cross-browser React.js interfaces and scalable backend logic in Java, applying object-oriented design and RESTful API patterns.
- Raised user engagement 20% with responsive, cross-browser UIs
- Increased online sales 30% with a full-stack e-commerce app
- Designed RESTful APIs and CRUD operations with authentication
- Applied OOP design to keep backend modules maintainable
B.Tech, Electrical Engineering
Galgotias College of Engineering & Technology
Strong foundation in engineering principles and analytical problem-solving that translates directly into software system design.
- System & Circuit Design
- Analytical Problem Solving
- Mathematics & Logic
- Project Management
Latest Blog Posts
In-depth articles on backend architecture, system design and full-stack engineering — written from production experience.
Building RAG with Node.js & TypeScript: A Production Guide
How Retrieval-Augmented Generation stops LLMs from hallucinating about your data — chunking, embeddings with pgvector, hybrid search, grounded prompts, streaming and a production checklist.
Read article
Understanding Access Control Models Every Backend Developer Should Know
Building secure and scalable applications with RBAC, ABAC, PBAC, FGAC, and ReBAC — with real-world examples and backend use cases for authentication and authorization.
Read article
Apache Kafka Explained Clearly: Why, Where, and How It Is Used
A clear, real-world walkthrough of Apache Kafka — producers, topics, partitions, consumer groups, and how event streaming powers scalable, fault-tolerant backend systems.
Read article
Understanding Pagination: A Complete Guide for Developers
Pagination looks simple but is key to performance, usability, and scalability. A step-by-step guide covering frontend vs backend pagination, slice(), Math.ceil(), and dynamic page buttons in React.
Read articleFrequently Asked Questions
Quick answers about my work, stack, availability and freelance rates.
Get In Touch
I'm always open to discussing new projects, opportunities, or just having a chat about technology.
Let's Connect
GitHub
github.com/YasowantX (Twitter)
@yash2062Location
Bangalore, India