Self-employed, taking contract AI evaluation work
Hi, I'm Mehul 👋

Software Engineer · AI Code Evaluation & Model Training

Full-stack engineer. Half my time shipping product code, half teaching models to write better code. React, Next.js, TypeScript, and AI code evaluation for Mercor, Alignerr and AfterQuery.
MK
50/50
How my week splits
3
AI training platforms
3 yrs
Building products

About

I'm a full-stack engineer who spends about half my time shipping product code and the other half teaching models to write better code.

Around three years building frontends and complete products: React, Next.js, TypeScript, Tailwind, shadcn/ui, Node, Postgres. Some Web3 as well (Solidity, Ethers.js, Ethereum and Solana). I've worked with startups and clients in the US, Italy and Singapore, and I contribute to open source with merged work in Next.js, shadcn/ui, Cal.com and Dub.

I also work as an expert software engineer for Mercor, Alignerr and AfterQuery. That splits into two kinds of task. Feedback and evaluation, where I implement real features on large open-source repositories and then assess model attempts at the same problems. And adversarial task authoring, where I write the instructions, reference solution and test suite for problems built to defeat frontier models. If the model passes, the task wasn't hard enough.

Both come down to the same skill: reading a large unfamiliar codebase quickly, telling a correct fix from one that merely looks correct, and explaining the difference in writing.

CurrentlySelf-employed, taking contract AI evaluation work and selective freelance builds.

AI Code Evaluation & Model Training

The work splits into two kinds of task. Both come down to reading a large unfamiliar codebase quickly and telling a correct fix from one that merely looks correct.

Feedback & Evaluation

  • Implement real features and fixes on large open-source repositories, then use that work as ground truth for model attempts at the same problems.
  • Review model-generated code on correctness, approach, and instruction following, not just whether it runs.
  • Assess web page builds and UI code where the failure is visual or structural rather than a thrown error.

Adversarial Task Authoring

  • Write the instructions, reference solution, and test suite for problems built to defeat frontier models.
  • Validate every task by running the model against it. A task only counts when the model fails.
  • Target failure modes that make a problem genuinely hard rather than ambiguous, so a failure points at a real capability limit.

Agent Transcript Review

  • Trace where the model's reasoning breaks down instead of only checking whether the output passes.
  • Run side by side evaluations of two models on one task, assessing each independently before comparing.
  • Judge whether the agent recovered from its own errors or kept compounding them.

Written Rationales

  • Explain why a solution succeeds or fails at a level another engineer can act on without rereading the diff.
  • Keep judgments consistent across a batch so the training signal stays clean.
  • Turn isolated mistakes into named, recurring failure modes a team can actually work against.

Task types I evaluate

Feature implementation
Bug fixing
Refactoring
Benchmark design
Adversarial testing
Code review
Test authoring
Web page builds
Agent transcripts
Technical writing

Work Experience

Product Engineering

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Self-Employed

Aug 2025 · Present
Frontend Engineer (Freelancer)
Working with clients across the US, Italy, and Singapore on frontend and light full-stack work; refreshed an EdTech UI, built an enterprise dashboard, and shipped a gaming e-commerce MVP with solid perf and UX improvements. Tools: Next.js (v15), TypeScript, React, shadcn/ui, Tailwind CSS, Framer Motion, GSAP, Zustand, Web3, REST APIs.
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Proof of Skill

Mar 2025 · Aug 2025
Frontend Engineer
Built a redesigned UI flow from Figma, improving responsiveness and overall UX across core product journeys. Reworked data flow by cutting out a middleware API dependency and switching to useRef-based logic, boosting performance by ~40%. Added Sentry logging, set up heatmap filters for real-time analytics, and worked closely with design and backend teams on delivery quality. Tools: React, Next.js (v14), TypeScript, TanStack Query, Zustand, Redux Toolkit, Framer Motion, AWS, Redis, Radix UI, Headless UI, Privy.io, Sentry, Mixpanel.
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Naga Soft Labs Private Ltd

Aug 2024 · Mar 2025
Software Developer
Fixed critical bugs and improved UI across a production social platform, noticeably improving stability and user experience. Integrated secure payment gateways and cleaned up API-driven product flows for better reliability and scale. Tools: React, Next.js (v14), Redux, TypeScript, JavaScript, Solidity, Vue.js, Pinia, DaisyUI, Node.js, Express.js, MySQL, Supabase, Firebase.
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Self-Employed

Oct 2023 · Aug 2024
Frontend Developer (Freelancer)
Started on Upwork building landing pages and small business sites, gradually moved to bigger projects and delivered production-ready UIs. Earned $400+ from early clients. Tools: React, JavaScript, Redux, Tailwind CSS, Git.

Skills

AI Evaluation & Model Training

AI Model Evaluation
Code Review
Large Language Models (LLM)
RLHF
Prompt Engineering
Adversarial Testing
Benchmark Design
Technical Writing
LLM Evaluation
Rubric Design
DPO / Preference Ranking
SFT Data Authoring
Agent Trajectory Review
Failure Mode Analysis
Hallucination Detection
Red-teaming
Adversarial Prompting
Data Annotation
Model Comparison

AI Tooling

Claude
Anthropic API
OpenAI API
OpenAI Codex
Gemini API
MCP (Model Context Protocol)
AI Agents
LangChain
RAG
Fine-tuning
HuggingFace
Cursor
GitHub Copilot
Windsurf
v0

Languages

HTML5
CSS3
JavaScript
TypeScript
C/C++
SQL
Python
Rust
Solidity

UI / Frontend

React
Next.js
Vue.js
Tailwind CSS
Shadcn UI
Radix UI
Headless UI
Material UI
Ant Design
DaisyUI
Framer Motion
GSAP
Three.js

State & Data

Redux
Redux Toolkit
Zustand
Pinia
TanStack Query
GraphQL
tRPC
Zod

Backend & DB

Node.js
Express.js
MongoDB
PostgreSQL
MySQL
Prisma
Drizzle ORM
Supabase
Firebase
Redis

Web3 / Blockchain

Ethereum
Solana
Ethers.js
Web3.js
Wagmi
Viem
Web3Modal
RainbowKit
OpenZeppelin
Hardhat
Foundry
Anchor
Metaplex
Thirdweb
Alchemy
IPFS
The Graph
Chainlink
ERC-20
ERC-721
ERC-1155
DeFi
Smart Contracts
Web3

Testing

Unit Testing
Jest
Vitest
Cypress
Playwright

Tools & Infra

Git
GitHub
GitHub Actions
Linux
Docker
Nginx
Turborepo
pnpm
Stripe
Vercel
Netlify
AWS
Cloudflare
Sentry
Mixpanel

Auth & APIs

Clerk
NextAuth
Privy
REST APIs
Webhooks
My Projects

Check out my latest work

AI products, full-stack apps, and on-chain systems I built end to end. This is the engineering background that makes my model evaluations worth reading.

Resume Genie(AI Resume Builder)

An innovative full-stack web application that helps users create professional resumes with AI-powered generation. Features seamless customization, real-time preview, secure Clerk authentication, and the ability to save and share resumes via unique links. Powered by Gemini API for intelligent resume optimization, ensuring ATS-friendly and industry-standard formatting. Users can generate, customize, and share their resumes with potential employers through an intuitive interface with live preview updates. The platform integrates MongoDB for data storage, Node.js backend, and TailwindCSS for responsive design across all devices. Future enhancements include template customization, LinkedIn integration, PDF export, and AI-powered cover letter generation.

Next.js 14
Typescript
MongoDB
Node.js
TailwindCSS
Clerk
Shadcn UI
Gemini API
EtherGuild(Decentralized Freelancing Platform)

EtherGuild(Decentralized Freelancing Platform)

A revolutionary decentralized freelancing platform combining blockchain technology with modern web development. Built on Ethereum, it enables secure, transparent, and trustless interactions between clients and freelancers worldwide. Features Web3 integration with MetaMask and WalletConnect, smart contract-based escrow payments, on-chain reputation system, and a modern responsive UI built with React and Tailwind CSS.

React
Typescript
Vite
TailwindCSS
Wagmi
Web3Modal
Ethers.js
Solidity
Hardhat
OpenZeppelin
Shadcn UI
Formify AI(AI Form Builder)

Formify AI(AI Form Builder)

A powerful and user-friendly application for creating customized forms effortlessly using AI. Powered by Gemini AI API, users can generate form fields based on prompts with full customization capabilities. Features include secure Next-auth authentication, responsive design with Shadcn UI, persistent PostgreSQL data storage, and admin dashboard for managing submissions. Users can create any form type, share via generated links, customize themes from six options, export form data to Excel, and control authentication requirements. Supports anonymous or authenticated form submissions with complete form data management. Built with Next.js for SSR, Drizzle ORM for database interactions, and DaisyUI for styling.

Next.js
Typescript
PostgreSQL
Drizzle ORM
TailwindCSS
Next-auth
Shadcn UI
Gemini API
DaisyUI
Admin Dashboard

Admin Dashboard

A React-based CRM dashboard featuring robust authentication, real-time data management, and an interactive Kanban board. Leverages Refine, GraphQL, Ant Design, and Vite for fast, responsive admin interface. Includes secure login/signup, granular access control authorization, dynamic dashboards with interactive charts, full CRUD functionality for companies and sales management, real-time Kanban board with due dates and multi-assignees, user profile management, and fully responsive design. Features real-time activity updates, sales analytics, task management with markdown descriptions, company profiles with search/pagination, and personalized account settings across all devices.

React.js
Typescript
GraphQL
Ant Design
Refine
Vite
Codegen
TailwindCSS
Contact

Let's build better models

Self-employed, taking contract AI evaluation work and selective freelance builds. Pick whichever way is easiest.

Jaipur, Rajasthan, IndiaIST (UTC+5:30), flexible for US and EU overlapAvailable now