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HardCoder404/README.md

Prince Raj · Software Engineer · Gen AI & Full Stack

Portfolio Resume LinkedIn Book a call

"Evidence over opinion. Rubrics before vibes."


👋 About me

Software Engineer with 2+ years shipping production systems on Node.js, Next.js, TypeScript and AWS. For the last year I have worked on LLM evaluation infrastructure: right now the evaluation harness, Docker execution layer, SFT data pipelines and graders behind a Microsoft frontier-model program at Quess Corp (client: Ethara AI). Before that, the internal LLM benchmarking platform at WhatBytes.

How I work: evidence over opinion, boring infrastructure that stays up, and rubrics before vibes. I write the measurement first, then the code.

🎯 Pick your lens
the site reorders itself for recruiters, engineers or founders
🤖 Ask Prince
an assistant that answers from my real work history
📄 JD fit report
paste a job description, get fit, gaps and a pitch
✂️ Tailored resume
my resume reordered for your role, as a shareable link

Try it → prince404.in


1,200+

Docker images shipped for LLM evaluation

50+

open-source repos wired into the eval harness

$50k/yr

cut from an AWS bill

10,000+

concurrent submissions handled by SafeReport

1.86s → 1.2s

AI response latency after tuning

💼 Experience

Career timeline: Xipper, DevTown, WhatBytes, Quess Corp

Quess Corp  ·  Software Engineer - Gen AI & Full Stack  ·  Feb 2026 – Present · Gurugram, India · On-site · **Client: Ethara AI**
  • 🧠 Architected and owned an end-to-end code-migration evaluation harness for a Microsoft frontier-model program, extending the RepoTransBench research benchmark into a production evaluation workflow adopted by the tasking team.
  • 🐳 Engineered 1,200+ multi-architecture Docker images (amd64, arm64) across 16 programming languages for LLM evaluation infrastructure, parallelised builds with Docker BuildKit and published to AWS ECR for high-throughput evaluation.
  • 🧪 Built an end-to-end Python data pipeline generating a Supervised Fine-Tuning (SFT) dataset for a frontier coding model: mined bounty-linked GitHub issues, filtered issue-resolving pull requests, extracted verified fix and test patches, and produced structured JSONL ground-truth instances across 16 languages.
  • 🗂️ Designed a registry-driven evaluation harness with per-repository build, dependency and test configurations for 50+ open-source projects (Redis, curl, systemd, Valkey, DiceDB), enabling deterministic, automated scoring of LLM-generated patches in isolated containers.
  • ⚖️ Owned grading and output verification: produced specification-compliant output bundles and agent trajectories, audited every sample end to end, and ran binary-rubric and side-by-side (SxS) evaluations against GPT-5.2 and Gemini-3 Pro, delivering structured JSON reports used in post-training analysis.
WhatBytes  ·  Full Stack Developer  ·  Aug 2025 – Jan 2026 · Bengaluru, India · Remote
  • 🤖 Architected an internal LLM benchmarking platform using Next.js, Node.js, and Redis to evaluate and compare outputs across 5+ frontier LLM APIs simultaneously.
  • 🔄 Designed multi-turn conversation evaluation pipelines, capturing per-turn scoring and semantic quality metrics across 10,000+ benchmark prompts.
  • 🔍 Automated data validation workflows by enforcing structured JSONL output schemas and mandatory rationale checks, cutting manual QC audit overhead by 35%.
  • ⚙️ Engineered configurable task-generation modules, allowing engineering teams to dynamically test model outputs against custom rubric criteria and export validated datasets for fine-tuning.
DevTown  ·  SDE I  ·  Jun 2024 – Jul 2025 · Mumbai, India · Remote
  • 🔌 Engineered 30+ scalable RESTful APIs using the MERN stack to power core platform features, standardizing frontend-backend data flow and implementing secure JWT-based user authentication.
  • 🤖 Architected an AI-powered chat application from the ground up, streamlining component rendering and backend data processing to improve frontend efficiency by 60% and backend performance by 30%.
  • ⚡ Optimized AI model response pipelines through strategic API design and advanced caching mechanisms, successfully reducing AI response latency from 1.86s to 1.2s (a 35% improvement).
  • 💰 Led a cloud infrastructure cost-optimization initiative, identifying underutilized AWS resources and enforcing S3 lifecycle expiration policies to reduce annual AWS expenditures by over $50,000.
  • 🛡️ Executed zero-downtime database migrations (leveraging NeonDB) and implemented robust security protocols, improving overall system scalability and operational efficiency by 40%.
  • 🚀 Spearheaded the rollout of new platform features across the MERN stack, establishing reusable UI components that cut down average development time by 40% and accelerated product iteration cycles.
Xipper  ·  Full Stack Developer (Internship)  ·  Nov 2023 – Jan 2024 · Bengaluru, India · Remote
  • 🔌 Designed and integrated 25+ RESTful APIs, reducing system overload and enhancing communication between frontend and backend systems by 30%, ensuring robust and scalable interactions.
  • 📡 Designed scalable real-time communication features using WebSocket, ensuring smooth and reliable user experiences in live chat applications, reducing latency issues by 35%.
  • 🛠️ Participated in regular code reviews and unit testing, identifying architectural bottlenecks and reducing legacy technical debt across shared modules by 30%.
  • ⚡ Optimized frontend rendering performance in React.js, reducing unnecessary DOM updates to deliver smoother tab switching and faster client-side navigation.

🚀 Featured project

SafeReport · AI-powered anonymous crime reporting platform · Next.js TypeScript Prisma PostgreSQL Gemini API Docker

  • AI-powered incident analysis, automatic report generation and real-time geolocation via the Google Maps API. A complete report in under a minute, with the reporter's identity never stored.
  • Prisma/PostgreSQL schema tuned with indexes and query patterns to sustain 10,000+ concurrent submissions, secured with end-to-end encryption, JWT authentication and rate limiting.

🧰 Stack


TypeScript

JavaScript

Python

Node.js

Express

Next.js

React

Angular

Tailwind

PostgreSQL

MongoDB

Redis

Prisma

GraphQL

Supabase

Firebase

Redux

Jest

AWS

Docker

Kubernetes

GitHub Actions

Nginx

Vercel

Git

Postman

Figma

📊 GitHub

Stats Streak
Languages

🧩 Problem solving

700+ DSA problems, LeetCode 1800+ rating, Codeforces 1200+ rating, GSSoC 2024 contributor

LeetCode Codeforces GeeksforGeeks CodeChef HackerRank

🎖️ LeetCode badges

Annual Badge 200 Days Badge 100 Days Badge 100 Days Badge 50 Days Badge 50 Days Badge December Challenge
November Challenge October Challenge June Challenge May Challenge April Challenge March Challenge January Challenge

14 badges · 200-day streak · annual 2024

Holopin badges


🤝 Connect

Portfolio    LinkedIn    X    Instagram    WhatsApp    Email

Fastest reply: email or the contact form on prince404.in. Usually within a day.

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