Looking for a job

Châu Khắc

@chukhc

Message

I build secure Solana money paths for execution, settlement, custody, and oracle pricing.

Vietnam

Message

What I'm looking for

I’m looking to build security-critical Solana and DeFi systems where execution, settlement, custody, and oracle correctness are treated as core product requirements. I value evidence-driven engineering, adversarial testing, and ownership of real money paths.

I build the parts of DeFi where money can go wrong: execution, settlement, custody, idempotency, and oracle pricing. Over four years, I’ve worked across Rust, Anchor, Pinocchio, TypeScript, and Solana protocol systems.

At Apeing Labs, I own money-path correctness for a live social-trading platform spanning HyperLiquid perps, Polymarket prediction markets, and Turnkey custody. I built idempotent order and withdrawal flows, on-chain verified cross-venue transfers, and hardened an AI-generated codebase through 399 merged PRs in 11 weeks.

I co-founded LazorKit and solely authored its audited, mainnet-live Solana smart-wallet program in Rust and Pinocchio. It supports passkey and Ed25519 authorities, policy-capped session keys, zero-copy state, and measured session-key execution at roughly 4,100 compute units.

I’ve also implemented Paradigm’s pm-AMM with Pyth pull-oracle settlement, built vesting and cross-chain settlement programs, and delivered governance systems from contracts through APIs and frontend. I work RED-first, using invariant, fuzz, reproduction, integration, and on-chain tests to prove fixes against real failure paths.

Experience

Work history, roles, and key accomplishments

Current

Founding Full-Stack Systems Engineer

Current

Apeing Labs Inc.

Jun 2026 - Present (3 months)

Owned money-path correctness end to end, including idempotent order and withdrawal submission, confirm-before-success settlement, and double-spend prevention. Built a cross-venue transfer gateway on LI.FI and Relay, and audited a large AI-generated codebase with 399 merged PRs in 11 weeks.

Rust Axum Tokio Sqlx NATS Next.js TypeScript Hyperliquid Polymarket Turnkey Li Fi Relay

Current

Co-founder & Protocol Engineer

Current

LazorKit

Mar 2025 - Present (1 year 6 months)

Sole author of a smart-wallet protocol on Solana, live on mainnet, audited by Accretion for the Solana Foundation. Implemented passkey and Ed25519 authorities, session keys with caps, and measured execution costs.

Rust Pinocchio WebAuthn Secp256r1 Ed25519 Solana Anchor Zero Copy State

Protocol Engineer

Private Web3 Company

Apr 2025 - Aug 2026 (1 year 4 months)

Implemented Paradigm's pm-AMM on Solana with Pyth pull-oracle settlement, and integrated Jupiter Swap and Perps into backend and frontend. Built wash-trade guards and fuzzed invariants.

Rust Anchor Python Jupiter Solana Q64.64 NestJS Next.js

Smart Contract Engineer

Caliber Venture

Dec 2024 - Mar 2025 (3 months)

Developed cross-chain escrow and settlement programs with program-controlled custody and deterministic state transitions. Designed failure paths to keep funds recoverable.

Solana Rust Cross Chain Technology Escrow Settlements

Smart Contract Engineer

Fabbi Holding

Mar 2024 - Nov 2024 (8 months)

Built SPL/Metaplex distribution with Merkle-proof allocation for IDO mechanics, integrated Streamflow vesting, and implemented Jupiter/Raydium routing. Developed Token-2022 and semi-fungible primitives for DCarbon.

Solana SPL Metaplex Merkle Streamflow Jupiter Raydium Token 2022