Shreyansh Arora

// about me

Who I Am

Hey — I'm Shreyansh, a software engineering undergrad at SRMIST, Chennai, from Gurugram, India. I sit at the intersection of backend systems, GenAI, and product — I don't just write code, I ship things people actually use.

I've interned at Infosys building fleet-management APIs at scale, and at Alliance Web Solutions shipping a real-time flight-intelligence dashboard. Outside of work I'm deep in competitive programming — currently Top 15% on LeetCode and climbing.

I build fast and I build for production. HaptIQ is live on the App Store. AlgoRAG runs a 4-stage hybrid retrieval engine with zero external API dependencies. Amazon ToGo is a fully serverless agentic platform on AWS. Every project here is real, deployed, and battle-tested.

☁️ AWS Certified Developer 📱 App Store Publisher 🧩 ICPC Participant 🏆 Top 300 Amazon HackON 🍎 Apple Swift Challenge

// skills

Tech Stack

⚙️

Languages

C++ Python Java JavaScript TypeScript SQL Bash Swift HTML / CSS Go (basics)

🔧

Backend & APIs

FastAPI Flask Node.js Express.js REST API Design GraphQL Microservices gRPC OAuth 2.0 JWT WebSockets SSE Rate Limiting Caching

☁️

Cloud & Infrastructure

AWS Lambda API Gateway DynamoDB RDS (MySQL) S3 ECS / ECR EC2 Bedrock CloudFormation SQS / SNS Azure DevOps Azure Pipelines GCP Cloud Run Docker Kubernetes

🤖

AI / ML / GenAI

LangGraph LangChain RAG Hybrid Retrieval BM25 pgvector / HNSW Reranking AWS Bedrock Claude / Nova LLaMA 3 Ollama Prompt Engineering PyTorch TensorFlow scikit-learn Pandas / NumPy Agentic AI

💻

Frontend

React.js Next.js SwiftUI Tailwind CSS Redux React Query Vite Framer Motion GSAP Responsive Design Figma

🛠️

Engineering & Practices

CI/CD GitHub Actions Linux Nginx Unit Testing Integration Testing System Design Low-Level Design OOP & Design Patterns Distributed Systems Concurrency DSA Agile / Scrum SDLC Jira

🗄️

Databases

PostgreSQL MySQL MongoDB pgvector DynamoDB Redis Oracle Teradata SQLite Schema Design Query Optimisation Indexing

🔎

Observability & Security

CloudWatch Prometheus Grafana OpenTelemetry Logging & Tracing IAM JWT / OAuth Rate Limiting HTTPS / TLS Secrets Management

🆕

Currently Exploring

Multi-Agent Systems MCP Protocol Fine-tuning LLMs Vector Search Model Serving Kafka Event-Driven Arch Service Mesh Terraform Rust

// experience

Where I've Worked

Software Development Engineer Intern

Infosys · Mysore, India

Mar 2026 – Apr 2026

Designed and developed RESTful APIs and role-based dashboard routing for a fleet-management platform, enabling real-time GPS tracking and high-frequency location-ingestion workflows at scale.
Automated regression testing across fleet-monitoring features, cutting manual QA effort by 30% and improving release reliability; delivered 70+ Jira user stories across 3 Agile sprints as Scrum Master.
Integrated an AI-driven anomaly detection service using Python, scikit-learn, and Pandas to identify unusual vehicle movement and GPS patterns for proactive fleet monitoring.

PythonFastAPIscikit-learnPandasAgile/ScrumGPS APIs

Frontend Developer Intern

Alliance Web Solution Pvt. Ltd. · Noida, India

Jun 2024 – Jul 2024

Built and deployed a full-stack flight-intelligence dashboard (React, Node.js/Express) with real-time multi-flight tracking and interactive data visualizations.
Integrated Google OAuth 2.0 and an OpenSky REST pipeline with response caching to mitigate third-party rate limits and eliminate redundant upstream calls.

React.jsNode.jsExpressGoogle OAuth 2.0REST APIsCaching

Technical Lead

Codenex Club, SRMIST · Chennai, India

Oct 2024 – Present

Co-led a 17-member engineering team to organize 5+ technical events, including DayZero with 700+ registrations.
Drove technical planning, speaker coordination, and platform infrastructure for large-scale competitive programming contests.

LeadershipEvent TechTeam Management

// projects

Things I've Built

GitHub ↗

AlgoRAG

GenAI-Powered Learning Platform

A full-stack learning platform over 2,300+ coding problems powered by a 4-stage hybrid retrieval engine — BM25 sparse search fused with HNSW-indexed pgvector dense search via Reciprocal Rank Fusion, then cross-encoder reranking. Zero external API dependencies.

🔍 4-stage hybrid retrieval: BM25 + pgvector (384-d) fused via RRF → cross-encoder rerank of top 50
🧩 Hand-rolled data structures: Trie autocomplete, min-heap top-K (O(n log k)), Kahn's toposort DAG, O(1) LRU cache
🤖 LangGraph agent: per-session memory, 4 intent routes, 3-level hint escalation, SSE token streaming
✅ Eval-gated CI/CD: build fails if retrieval Recall@5 < 0.6 — blocks silent regressions

PythonFastAPIPostgreSQLpgvectorLangGraphDockerNext.jsAzureGitHub Actions

GitHub ↗

Amazon ToGo

AI Reorder Agent & Intent-to-Cart Planner

Agentic e-commerce platform on AWS where a Bedrock (Claude/Nova) agent decomposes free-text intent (e.g., "Chicken biryani for 6") into a complete shopping plan mapped to real catalog products, with a rule-engine fallback.

🧠 Bedrock agent: Claude/Nova decomposes natural language into structured cart plans with catalog mapping
☁️ Serverless architecture: FastAPI on Lambda + API Gateway, DynamoDB (trolleys/orders), RDS MySQL (catalog), S3 (media)
🏗️ IaC deployment: CloudFormation (AWS SAM) on ECR with multi-account isolation + per-user auth
🔄 Rule-engine fallback: deterministic fallback when LLM confidence is low for reliability

PythonFastAPIAWS BedrockLambdaDynamoDBRDSS3CloudFormationNext.js

App Store

🟢 LIVE ON APP STORE

HaptIQ

iOS Haptics-Based Multiplayer Social Deduction Game

Real-time multiplayer game where touch is the only sense that matters. Players feel haptic vibration sequences and must guess the count. The imposter gets misleading feedback and must bluff — creating a tension-filled social deduction experience unlike anything on the App Store.

📳 Haptic sequences: Players experience vibrations and guess counts to survive elimination rounds
🎭 Imposter mechanic: One player gets misleading/no feedback and must convincingly bluff
🗳️ Voting system: Incorrect guesses trigger elimination votes; correct imposter guesses skip voting entirely
🔴 Owned full SDLC: Design → development → automated testing → iterative App Store deployment, solo

SwiftSwiftUIMVVMREST APIsCoreHapticsReal-time Multiplayer

// achievements

Wins & Recognition

🏆

Top 300 — Amazon HackON 6.0

Among 62,000+ participants nationwide. Competed in India's largest Amazon-hosted hackathon.

🤖

Top 2% — AI Impact Buildathon

HCL GUVI competition. Ranked in top 2% out of 40,000+ teams nationwide.

☁️

AWS Certified Developer – Associate

Validated expertise in AWS services, serverless architecture, and cloud-native development.

🍎

Apple Swift Student Challenge 2025

Top 10% globally. Selected by Apple for the prestigious Swift Student Challenge.

⚡

LeetCode 1700+ Rating

Top 15% globally. Global Rank 2509 out of 34,267 at Weekly Contest 504.

🎯

ICPC Online Challenge

Participated in the prestigious Huawei-powered ICPC Online Challenge.

🥈

2nd — Leap'24 Hackathon

Runner-up at Leap'24. Also 3rd place at Hacktrix'24 (IEEE Computer Society).

📱

iOS Student Dev Program

Apple & Infosys iOS Development Program — ranked Top 100 in department.

Find me on

GitHub LeetCode LinkedIn CF Codeforces CC CodeChef