Aryan Kumar
Software engineerIdeas,
made real.
AI systems, mobile apps, automation.
From the first idea to the last detail.
Work
AI systems, real-time infrastructure, mobile apps at scale
Full Stack & Mobile Developer
MasterJi · Chai Aur Code · Remote
Own the MasterJi stack end-to-end.
Mobile app, web platform, backend APIs, databases, security, deployments for Hitesh Choudhary sir's MasterJi platform. Redesigned the entire app UI solo from scratch. Serving 100K+ students.
15K+ downloads on mobile
What I built at MasterJi
- Built MasterJi's hackathon hosting platform end-to-end. Anyone can run a real hackathon on it: registration, submissions, sponsors, prize pool, judging, winners, verified certificates. The judging is agentic and relative. Agents clone every submission's repo, read the source, verify the deployment is actually live, and score against every other submission in the batch via shared memory and calibration. Final round runs as a head-to-head bracket so top projects compete directly. 200+ submissions judged in under 4 hours, in production.
- WhatsApp-style chat system from scratch. React Native rendering engine, real-time backend, database schema, security layer. FlashList with variable-height cells and recycled views for thousands of messages.
- Discord-like search and navigation. Advanced chat search algorithm, paginated message loading, jump-to-latest, scroll through older chats seamlessly.
- Real-time sync across web and mobile for tap-to-reply, message reactions, read receipts, and media uploads.
- Handled 15M+ message events (1.5 crore) across 10K+ active users on web and mobile.
- Built a React Native multi-language code editor with syntax highlighting and a challenge runner, plus Judge0-backed workflows handling around 600 submissions daily.
- Cut live quiz CPU from 99% to 10%. Handles 1,400 concurrent quiz takers with a real-time leaderboard.
- Bulk push notifications across iOS and Android. Automated re-engagement flows plus admin-controlled blasts at 10K+ scale.
- Row-level security across every table. Hardened edge functions and database functions, role-based access controls, admin panels with granular permissions.
- End-to-end mobile release pipeline. App Store and Play Store submissions, review policies, provisioning profiles, certificates, full pipeline from build to production.
- Shipped a coding-problem generation service across five languages. Built with Python, FastAPI, and LangGraph. Reduced one generation workflow from 11 model calls to one.
Currently continuing on a limited-hours contract alongside my own startup work.
B2B Builder & Software Developer
OpenBuilder (YC F25) · Remote
Worked directly with the CTO on OpenBuilder's platform, AI-assisted coding tools, and B2B client applications.
- Live streaming and WebRTC video calling. Helped a client build and ship these features quickly.
- Full-stack product development. Built features with React, Next.js, and TypeScript, using Convex, Supabase, and PostgreSQL.
- Hands-on debugging and implementation. Unblocked developers on the platform and helped clients finish their products.
Freelance Full Stack & Web3 Developer
Remote · Global
Solo freelance, global clients, $30K+ revenue. Acquired clients through YouTube marketing and Discord/Telegram communities during the 2022 DeFi hype.
- Shipped trading bots and smart contract arbitrage bots, maintained them across the full contract period
- Built full-stack web apps, DeFi dashboards, and blockchain integrations solo
- Delivered intelligent trading agents with automated execution and on-chain monitoring
Projects
11 hackathon wins · $47K+ in prizes · AI, DeFi, Web3
ClawdDAO: AI-Powered Governance Delegation for Solana
Solana Graveyard Hackathon 2026 — Tapestry Track 2nd Place (74 submissions)
Delegate your DAO votes to an AI agent. Describe your values in plain English, pick a personality, set a confidence threshold, and the agent votes on Solana proposals for you. Every vote gets posted publicly with full reasoning so anyone can audit. (Live deployment taken down.)
ybAMM: Zero-IL Liquidity for Uniswap v4
Uniswap Hook Incubator (UHI 9) - Impermanent Loss Track Winner
A Uniswap v4 hook where impermanent loss cancels in the algebra, not in expectation. It holds a YieldBasis L=2 position on a single Euler credit account, so LP value stays linear in price and the loss term is gone, not averaged away. Chainlink prices the collateral on-chain; Reactive Network autonomously holds the leverage on target through drift, cron, and solvency loops with no keeper. Live on Unichain Sepolia.
RepoChat: AI Code Review with Full Codebase Context
WeMakeDevs 'The UI Strikes Back' Hackathon — Participant
AI code review that understands your entire codebase, not just the diff. Indexes repos with Tree-sitter AST parsing and vector embeddings, then reviews PRs with semantic context. 12 generative UI components (security alerts, dependency graphs, severity heatmaps), 11 GitHub tools, per-user MCP integrations, and GitHub App webhooks for auto-reviews. Self-hosted Tambo backend for AI orchestration. (Backend VPS taken down, frontend on Vercel only.)
SRE Sentinel
Future Stack Gen AI Hackathon by WeMakeDevs - Docker MCP Gateway Track Winner
Self-healing monitor for Docker containers. Spots anomalies with Cerebras AI, runs root cause analysis with Llama 4, then automatically fixes issues through Docker's MCP Gateway. Real-time telemetry over WebSocket, dynamic tool discovery from MCP servers, and plain-English incident summaries.
deChat: AI-Powered DeFi Interface for Sonic
Sonic DeFAI Hackathon 2025
Chat interface for the Sonic blockchain — swap tokens, stake, bridge assets cross-chain, check balances, all through plain English. Handles 40+ blockchain actions via natural language. Won against 282 submissions. Sonic awarded $5K, deBridge added $2.5K for the cross-chain integration. (Live deployment taken down.)
Subis
Chainlink Blockmagic 2024 Winner
Decentralized subscription billing on zkSync. Native Account Abstraction handles gasless payments, Chainlink Price Feeds keep pricing pegged to USD in real-time. Users subscribe once — auto-billed monthly, no gas wallet needed.
Dynamic LP Assurance Hook
Atrium Academy Cohort 3 Winner
Uniswap V4 hook that automatically insures LPs against impermanent loss. Protection adapts to market conditions, flash loans generate extra yield to cover the gap. Written in Rust on Arbitrum Stylus (WASM smart contracts). Built during Atrium Academy's 8-week cohort.
Superfluid Swapper
PancakeSwap Hookathon 2024 Winner - 3rd Place
PancakeSwap hook that adjusts pool fees dynamically based on market conditions. Uses zero-knowledge proofs to verify state without exposing data — cuts impermanent loss and improves LP returns.
Opensource
Contributions to open-source tools, plus my latest pull requests
Accomplish: seven pull requests in one week
Contributed to a 10K-star Electron desktop agent after first learning its codebase. My daemon architecture covered an HTTP server, WebSockets, authentication, and rate limiting; the maintainers consolidated it with other contributions and shipped it to main.
The other contributions covered AWS AgentCore, Browserbase cloud browsing, WhatsApp integration, Groq and Fireworks providers, and task favourites.
Read the engineering breakdownAbout
I love tinkering with tech. Reading through codebases of the best engineers in open source, figuring out how things actually work under the hood, then building my own version of it. That's my loop.
My focus is applied AI, developer tools, and product engineering. I've built systems to review 200+ hackathon submissions in under four hours, check whether code that passed CI is actually running in production, and edit video with AI assistance.
I like owning a problem from the first idea through to a usable product, learning whatever it needs along the way. Based in Noida, India, I'm open to remote work with a small team building closely with the people who need the product.
Outside of code, I watch movies, work out, and roam around in nature. I also run a Creality Ender V3 SE and 3D print random things for fun.
TypeScript
JavaScript
Rust
Python
Go
Java
Next.js
React.js
Expo
Electron
Node.js
Express.js
PostgreSQL
MongoDB
Supabase
Convex
DynamoDB
Redis
AWS
Docker
Kubernetes
Terraform
Solidity
Web3.js
Ethereum