Software & AI Engineer
BASED IN  Tiruchirappalli, IN
STATUS  Open to roles · 2026

SUNIL
SAINI

I build full-stack products and AI systems that hold up under load, from RAG pipelines and real-time platforms to distributed backends engineered for scale.

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01

Profile

Chemical Engineering major, Computer Applications minor, building software full-time.

Final-year engineer at NIT Tiruchirappalli who turns hard backend and AI problems into shipped products.

My work spans the stack: React and Next.js on the front, Node.js, FastAPI and Django behind it, and Redis, PostgreSQL and vector stores underneath. Lately I'm deep in applied AI: retrieval-augmented generation, hybrid search, and evaluation pipelines that keep LLMs honest.

I've shipped a cross-platform app to both app stores, built a real-time language-learning platform, and designed systems that survive high-concurrency traffic. Competitive programming keeps the fundamentals sharp, with 1100+ problems solved across LeetCode and CodeChef.

// quick read

EducationNIT Trichy
Major / MinorChem Eng · CS
GraduatingMay 2026
FocusAI · Backend · Systems
LeetCode~1800 rating
CodeChef~1750 rating
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Experience

Where I've shipped: internships and product roles.

JUN 2025 to JUL 2025
On-site · Trichy
Software Development Intern
National Institute of Technology, Trichy
  • Spearheaded a web-based Life Cycle Assessment (LCA) platform bringing digital tooling into sustainability research.
  • Designed and built an intuitive frontend with React.js, HTML, CSS and JavaScript.
  • Built an AI-powered chatbot delivering real-time sustainability insights and lifting engagement.
  • Streamlined LCA calculations and shipped data-visualization dashboards for stakeholders.
DEC 2024 to FEB 2025
Hybrid
Application Developer
AutoTiger
  • Built a cross-platform mobile app in Flutter for commercial vehicle sales: buy, sell and browse flows.
  • Implemented analytics with Google Analytics & Firebase to track behavior and improve engagement.
  • Delivered and deployed to both the Google Play Store and Apple App Store.
03

Selected Work

Products and systems I designed and built end-to-end.

/01
Full-stack · Real-time

Lingua Connect

An online language-training portal with multi-role auth, teacher discovery and course management. WebRTC + WebSockets power real-time 1:1 video sessions, messaging and file sharing for 500+ potential users, with Razorpay billing that cut manual scheduling effort by 40%.

Next.jsNode.jsMongoDB WebRTCWebSocketsRazorpay
JUL 2025
/02
Applied AI · Retrieval

Advanced RAG System

A production-grade RAG pipeline with context-aware chunking and BGE embeddings for high-quality semantic retrieval over large corpora. A hybrid BM25 + dense search stage with cross-encoder re-ranking tunes top-k relevance, while context compression and RAGAS evaluation drive faithfulness and cut hallucinations.

LangChainBGEBM25 Cross-encoderRAGASVector DB
SINCE MAR 2026
/03
System Design · Scale

Event Ticket Booking Platform

A scalable ticketing system with seat-inventory management, dynamic pricing and high-concurrency support. Redis caching, distributed locking and transactional workflows prevent overselling, while optimized REST APIs deliver low-latency performance, fault tolerance and horizontal scalability.

RedisDistributed LocksREST PostgreSQLHigh-concurrency
MAY 2025
04

Toolkit

The stack I reach for, grouped by layer.

Languages 01

PythonJavaDartC / C++

Backend 02

Node.jsFastAPIDjangoRESTMicroservicesWebRTCJWT

Frontend 03

React.jsNext.jsHTML5CSS3JavaScript

AI / ML & GenAI 04

RAGLangChainLangGraphLLMsHugging FaceSemantic Search

Databases 05

MongoDBMySQLPostgreSQLRedisQdrantChromaDB

Cloud & DevOps 06

AWSAzureDockerKubernetesCI/CDGitHub
05

Signals

Proof of problem-solving and continuous learning.

0
DSA problems solved

Across LeetCode and CodeChef, with consistent practice that keeps fundamentals and intuition sharp.

0
LeetCode rating

Paired with a ~1750 CodeChef rating, demonstrating strong, reliable algorithmic problem-solving.

Certifications & recognition  // Generative AI · upGrad Google Cloud Skill Badge AWS · Intellipaat 2025 Vertex AI · Prompt Engineering Kho-Kho College Contingent
Let's build something

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