Harsh Kasana
I ship DeFi products end-to-end — ideation to production. Taste over tooling.
Built DeFi infrastructure at Reactive Network. Final-year B.Tech at IIIT Nagpur.
As Featured In
Process
How I Build
The path from idea to shipped is the same every time, regardless of stack — contract, web app, desktop binary, or infra:
Argue with AI before code
I don't ask AI to validate me — I ask it to break me. I pitch the idea, it counters, I push back, it counters harder. By the time I open an editor, the direction has survived a real adversary, not just my own optimism.
MVP, not a deck
Whatever shape the product needs — web app, desktop binary, on-chain protocol, mobile, internal infra — I build the smallest version that proves the loop end-to-end. No half-done branches, no “I'll come back to this.”
New stack? Steep, then ship
If a project needs something I haven’t built before, I don’t fake it. I read codebases that already do it well, copy the patterns into my head, then build with them. Electron + native screen capture (FocuClone), Solana perpetuals via Flash/Drift (Hashtro), x402 micropayments (rc-agents) — none of that was familiar before I shipped it.
Finish
Every project on this page has a live URL or a video. I don't list ideas, and I don't leave half-finished work behind me.
Work
Selected Projects
REACTOR / ReacDEFI
DeFi AutomationNo-code DeFi automation platform — stop-loss, liquidation protection, AI conversational setup
leverage-loop
DeFi Strategy · Protocol DemoAutomated leverage looping across Aave and Uniswap — merged into Reactive Network's official demo repo
MetroDiaries
Consumer AppCommuter matching for Delhi Metro — real-time chat, KYC verification, 250+ stations
FocuClone
Desktop AppA record → auto-edit → publish pipeline for creators whose main work isn't editing — it edits while you record.
More Projects
Solidity
Contracts I've Written
Project cards hide the contract work inside them. This is the actual Solidity range — grouped by what each system does, from the first ERC-20 to strategy contracts running in someone else's canonical repo.
Tokens & Markets
Where the Solidity started — token standards and pricing curves.
The MERCAT token economy and NFT editions whose price auto-adjusts to market demand on a constant-product curve — my first real contracts.
MercadoAutonomous Automation
Event-driven contracts that act on their own — no bots, no keepers, no off-chain oracle.
Proposal and execution flow that settles itself on-chain. Won a $400 Reactive Network bounty.
Dec_Autnomous_GovernanceClaims that pay out on a trigger condition instead of an adjuster. Built for the same bounty round — this one didn't win.
FiduciaPrice-triggered order execution across chains, driven by Reactive Smart Contracts watching Uniswap.
Multi-Chain-Stop-OrderMonitors health factors 24/7 and unwinds or tops up a position before liquidation hits. The flagship automation in ReacDEFI.
ReacDEFIDeployment contract so non-technical users could ship their own automation instances without touching a terminal.
DeFi Strategy
Capital-efficiency strategies encoded as contracts.
Supply, borrow, swap, re-supply — looping across Aave and Uniswap until a target health factor is hit, with oracle-driven slippage protection. Written for Reactive Network and merged into their official demos repo.
Reactive-Network/demosRebalances a concentrated-liquidity position as volatility moves the useful range. Took 2nd at the Kwala Hacker House.
kwala-range-managerAutomated fee harvesting for LP positions, so yield compounds without manual claims.
Cross-Chain
Contracts whose whole point is that they span networks.
Buy and sell ERC-721s on any chain, settled through Reactive Network. The real goal: creators keep earning royalties on every future resale, instead of depending on a marketplace like OpenSea choosing to honour them.
MONARCDeposit ETH on one chain, receive the loan on another — collateral release triggered by repayment, with no bridge operator in between.
ReactiveFlow-LenderAdversarial / Research
Contracts written to be caught — the attacker half of a detection problem.
Mock laundering flows, P2P exchange contracts and coin-mixing techniques, built deliberately so our own backend algorithm had something real to detect. Smart India Hackathon finalist.
CoinMixer_ContractTeaching
Building in Public
I learn hard systems by rebuilding them, then explain what I found — in videos and technical threads.
Background
About
I'm a Full-Stack & Smart Contract Engineer. At Reactive Network I shipped production DeFi — Reactive Smart Contracts, cross-chain architecture, and tooling that makes blockchain usable by non-technical people. I'm now building independently while finishing my B.Tech (ECE) at IIIT Nagpur (CGPA 8.37).
I write on Medium and teach through technical videos and threads — system design, Git internals, Next.js rendering. My work spans no-code DeFi platforms, AI agents, developer tooling, and now Go + cloud infrastructure.
Where I focus
Smart Contracts
Production deployments on EVM mainnets and Solana. Reactive Smart Contracts as a daily driver.
Solidity · Reactive SCs · Rust + Anchor · Foundry · Hardhat · wagmi/viem
Full-Stack Product
Contract, API, and UI in the same week. Realtime, auth, and KYC where the product needs them.
Next.js · TypeScript · FastAPI · Node.js · Supabase + Postgres · Convex
AI Integration
Natural language → on-chain action. Agent loops, MCP servers, x402 micropayments.
Gemini · Claude / Claude Code · MCP · x402 · TensorFlow
also fluent inElectron · WebSocket · Privy · Tailwind · Framer Motion · ffmpeg · Vercel · Sui · Citrea · Base
Next
What I’m Looking For
Roles
Smart Contract / Solidity Engineer · Full-Stack Web3 · DeFi Protocol Engineer
Stage
Seed → Series B (early enough to own real surface area)
Location
Remote, or relocating — anywhere in India unconditionally, and outside India wherever the role sponsors a visa
Available
Immediately — B.Tech, IIIT Nagpur, graduated May 2026
Open to founding-engineer roles where the team is okay with someone growing into the title.
Timeline
Journey
Building independently — Go, cloud infra & systems
Self-directedJun 2026 — present
Going deep on Go and cloud by rebuilding hard systems from scratch — a Terraform engine (light-tf), Git, and containerized Go services — and teaching what I learn through videos and technical threads.
DApp & Solidity Developer · FDE · Video Creator
Reactive NetworkApr 2025 — May 2026
Shipped ReacDEFI — the first production DApp on Reactive Network — built autonomous Reactive Smart Contracts, served as a Forward Deployed Engineer, and created developer-facing video content.
$9K Grant + Press Coverage
Reactive NetworkMar 2025
REACTOR featured on Chainwire, CryptoSlate, Blockchain Magazine, and BlockTelegraph.
2nd Place — Kwala Hacker House
HackathonNov 2025
A Uniswap V3 range manager that rebalances concentrated liquidity against market volatility.
Winner — Walrus track, ETHIndia (Bengaluru)
HackathonDec 2024
Built and shipped Walrus-SDK, a TypeScript SDK for Walrus decentralized storage on Sui — later published to npm. India's largest Ethereum hackathon: 750+ hackers, 275 projects.
1st + 2nd Place — International Reactive Hackathon
HackathonNov 2024
Two separate cross-chain protocol submissions placed simultaneously — MONARC and REACTOR — at $2,000 each. The result that led to the grant and the job.
$1,000 — US Blockchain Bounty Program
Bounties2024
$400 + $600 from two separate blockchain protocol bounties — the first was an autonomous governance protocol on Reactive Network.
First hackathon — the run begins
PCCOE, PuneFeb 2024
Built Subasta, a Web2 auction platform, and won nothing. Seven wins followed across the next two years once the pivot to Web3 landed.
B.Tech ECE — CGPA 8.37
IIIT Nagpur2022 — 2026
Electronics and Communication Engineering with focus on distributed systems.