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Jash BohareAvailable for work

I build blockchain products end to end, from secure contracts to the apps people use.

I design, test and ship smart contracts in Solidity, then build the indexers, APIs and interfaces around them. Right now I'm running Memeko, a token launchpad live on mainnet, for a client.

19
projects shipped
900+
automated tests written
8
contracts verified on mainnet
2
client engagements
Shipped onEthereumBaseArbitrumKinetiq ElysiumHederaCasperStellarZcash
§01  Client work

Paid engagements, shipped and running.

Work delivered for real clients, from a mainnet DeFi protocol to a company's public website.

C.1  Client engagementOngoing

Memeko

Token launchpad · 2026

A fair-launch token launchpad, live on mainnet. Bonding curves graduate into a DEX pool with zero price shock.

Scope
  • Smart contracts
  • Indexer & API
  • Trading app
  • Production ops
Network
Elysium mainnet
Contracts
8 deployed & verified
Tests
~170 Foundry
Security
Audited + timelock
memeko.fun
Memeko — desktop
Memeko — mobile
C.2  Client engagementDelivered

Vimal Impex

Company website & product catalogue · 2026

A professional website and product catalogue for a multi-ISO-certified metals manufacturer, built to turn visitors into quote requests.

Scope
  • Design
  • Development
  • SEO
  • Deployment
I'm extremely happy with the website created for Vimal Impex. The design is clean, professional, and perfectly represents our brand. Everything works smoothly, and the attention to detail is impressive. Highly recommended for anyone looking for quality web development.
— Owner, Vimal Impex
vimalimpex.com
Vimal Impex — desktop
Vimal Impex — mobile
§02  Selected projectsAll 19 →

Protocols, drawn to spec.

Each schematic shows how the system actually works. Open one for the full case study, contracts and tests.

P.1  MEV-resistant DEXVerified on Arbitrum Sepolia

ClearSwap

A DEX that settles trades in 45-second batch auctions at one uniform price, so there's no ordering to front-run, and it uses 82.5% less gas.

Gas
−82.5% vs EVM
Batch window
45s auctions
Engine
Rust → WASM
Tests
52 passing
Solidity · ArbitrumStylus123456userTradercontractOrderBookcontractClearingAdaptercontractClearingEnginecontractSettlementcontractWETH / USDC
  • Rust
  • Arbitrum Stylus
  • WASM
  • Solidity
  • Foundry
  • React
  • +1
How it works
P.2  DeFi integration & security labVerified on Base Sepolia

Zapline

A hardened Uniswap V2 integration suite, with a lab that reproduces four real DeFi exploits and the defense for each.

Tests
109 across 12 suites
Attack PoCs
4 exploits + fixes
Deployed
7 verified contracts
Math
512-bit safe sqrt
1234567userTradercontractSwapExecutorexternalUniswap V2 paircontractFlashSwapuserLiquidity providercontractZap + ZapMathcontractLPVaultcontractTwapOracle
  • Solidity
  • Foundry
  • Uniswap V2
  • ERC-4626
  • Base
How it works
P.3  Non-custodial wallet

AstraVault

A non-custodial Ethereum wallet built from the standards up: HD key derivation, encrypted storage and EIP-1559 signing.

Encryption
AES-256-GCM
KDF
PBKDF2 · 310k iter.
Derivation
BIP-32 / 44
Signing
EIP-1559 · EIP-191
In the browser12345userUserinterfaceWallet UIserviceKey managerserviceSignerexternalEthereum RPCstorageEncrypted vault
  • TypeScript
  • React
  • Vite
  • Ethers.js v6
  • Web Crypto
How it works
§03  About

Contracts, backends and frontends: the whole stack.

I'm a full-stack blockchain developer. I care about the whole path a transaction takes: the contract that holds the money, the tests that prove it can't be drained, the indexer that makes it queryable, and the interface someone actually clicks.

My work covers DeFi protocols (AMMs, bonding curves, batch auctions, vaults, vesting, staking), wallet infrastructure and on-chain payments. Security is part of the build, not a later step: fuzz and invariant suites, reproduced exploits, timelocks and audits.

01

Smart contracts & protocols

AMMs, bonding curves, batch auctions, vaults, vesting and staking, written in Solidity and structured for upgrades with UUPS proxies and timelocks.

02

Security-first engineering

Unit, fuzz and invariant suites in Foundry, reproduced exploits paired with their defenses, audit-ready code and careful fixed-point math.

03

Full-stack products

Event indexers, APIs and real-time backends (Node, Postgres, Redis), plus Next.js and React interfaces, shipped to production with monitoring.

Toolkit

Smart contracts
  • Solidity
  • Foundry
  • Hardhat
  • OpenZeppelin
Protocols & standards
  • Uniswap V2
  • ERC-20
  • ERC-721
  • ERC-4626
  • UUPS proxies
  • ENS
  • x402
Frontend
  • TypeScript
  • React
  • Next.js
  • wagmi
  • viem
  • Ethers.js
  • Tailwind CSS
Backend & data
  • Node.js
  • Express
  • Prisma
  • PostgreSQL
  • Redis
  • Socket.io
  • MongoDB
  • FastAPI
§04  Experience

Where I've worked.

  1. May – Aug 2026
    Blockchain Developer Intern
    Calip.io

    Built a production-grade DeFi protocol in Solidity covering token factory, presale, treasury, pricing oracle and marketplace contracts, deployed on Base Sepolia.

    • Solidity
    • Foundry
    • Base
  2. Dec 2025 – Jan 2026
    Developer Relations Intern
    TriKaya

    Simplified blockchain labs for developers, supported the developer community and improved documentation workflows.

    • DevRel
    • Docs
  3. Sep – Oct 2025
    Blockchain Developer Intern
    PedalsUp

    Went deep into Uniswap v4 and built custom on-chain swap functions from scratch in Solidity and Foundry.

    • Uniswap v4
    • Solidity
  4. Jun 2025 – Jan 2026
    Co-Head
    GENESIS Web3 Community

    Organised workshops, ideathons and guest sessions on blockchain and Web3 development.

    • Community
    • Workshops
§05  More projectsAll 19 →

Other things I've built.

§06  Contact

Have something to build on-chain? Let's talk.

I'm open to full-time roles and freelance builds. Email is the fastest way to reach me, and I usually reply within a day.