I'm a solution-oriented Senior Software / Blockchain Engineer with 8+ years of experience in the software industry.
“We can’t truly solve a problem until we’re able to see it thoroughly.”
This philosophy has guided me through building impactful software systems that solve real-world problems. I’m particularly passionate about Bitcoin-native architectures, MPC wallets, and financial infrastructure that balances security, scalability, and user custody.
Throughout my career, I’ve focused on designing systems, leading development efforts, and turning complex research into production-ready solutions across SaaS and blockchain domains.
- LinkedIn: https://www.linkedin.com/in/khanh-chau/
- Email: khanh.chaux@gmail.com
Nov 2023 - Now /
Senior Blockchain Engineer
- Company: Caliber – Web3 Venture Builder, led by Loi Luu (Co-founder of Kyber Network) Co-builds AI and blockchain startups from Day Zero — portfolio includes Kyber, Jupiter, Meteora, Zilliqa, Optimex and more. Backed by Pantera, Parafi Capital, DeFi Alliance, and others.
Bitcoin-native DeFi — cross-chain swaps and trustless lending, keeping full custody of your Bitcoin.
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Tech Stack:
- Languages: TypeScript, Rust, Solidity
- Frameworks: NestJS, React
- Infrastructure: PostgreSQL, Redis, GCP (GKE, GCS, GCR)
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Key Achievements:
- Cross-Chain Swap (Bitcoin ↔ EVM, Bitcoin ↔ Solana)
- Built swap infrastructure bridging Bitcoin with EVM and Solana ecosystems.
- Achieved $5M+ trading volume since launch.
- Researched and designed Bitcoin Script-based spending paths, including time-locked and condition-based flows.
- Worked with Taproot concepts, script trees, and covenant-like constraints for Bitcoin-native protocols.
- Bitcoin Lending Protocol
- Designed and implemented a lending system allowing users to stake Bitcoin on-chain and borrow USDC on Ethereum — no custody transfer required.
- Supported yield strategies and custom position management while preserving full Bitcoin self-custody.
- Analyzed security trade-offs between on-chain script enforcement and off-chain coordination.
- MPC Wallet Architecture
- Architected and implemented MPC (Multi-Party Computation) wallet interfaces for Bitcoin and EVM-compatible chains.
- Designed secure signing flows, key lifecycle management, and recovery strategies.
- Integrated MPC-based validation into both Swap and Lending protocols.
- Core Protocol & System Design
- Built core transaction validation and execution logic.
- Designed systems resilient to network delays, partial failures, and signer unavailability.
- Collaborated closely with research and product teams to bring protocol research into production.
- Cross-Chain Swap (Bitcoin ↔ EVM, Bitcoin ↔ Solana)
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Refs: https://optimex.com/
The world's first AI-powered web3 assistant — making web3 as easy as chatting with friends, built right into Telegram.
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Tech Stack:
- Languages: TypeScript, Rust
- Frameworks: NestJS, React
- Infrastructure: PostgreSQL, Redis, AWS (K8s, CloudFront), GCP (GKE, GCS, GCR)
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Key Achievements:
- First MPC Wallet in Telegram — pioneered a self-custodial, MPC-secured smart wallet natively embedded in Telegram, supporting TON, Solana, Ethereum, Base, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Berachain, and more — no seed phrases required.
- Architected and implemented the multi-chain MPC wallet infrastructure — secure key management, signing flows, and recovery strategies across heterogeneous chain environments.
- Integrated with top DeFi protocols and cross-chain services: Jupiter, KyberSwap, deBridge, Li.Fi, STON, Swing, and others — enabling swaps, cross-chain transfers, and DeFi actions via natural language.
- Developed transaction indexing services tracking on-chain activity across multiple blockchains in real time.
- Built core AI interface allowing users to send/request funds, retrieve market data and charts, execute trades, and set automated DCA strategies — all through conversational chat.
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Refs: https://www.tobi.fun/
Apr 2022 - Oct 2023 /
Senior Software Engineer
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What's it: Poko – Seamless Fiat Payments for Web3
(Fiat on-ramp aggregator — acquired by Web3Auth in Oct 2023) -
Highlights:
- Raised $5M total — $500K from Y Combinator + $4.5M seed from Y Combinator, NAZCA, Global Founders Capital, Goodwater Capital, Pantera, Soma Capital, Dentsu Ventures, and others.
- Platform reduced NFT/crypto purchasing costs by up to 70%, boosted transaction success rates by 5x, and increased paid user conversion by 79%.
- Poko’s On-Ramp Aggregator was acquired by Web3Auth in Oct 2023, strengthening Web3Auth’s global fiat-to-crypto payment infrastructure.
- Official announcement: https://blog.web3auth.io/announcing-web3auths-acquisition-of-poko-on-ramp-aggregator/
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Technologies:
- Language: TypeScript
- Frameworks: Next.js, NestJS, React, Taro
- Database: PostgreSQL, Redis, RabbitMQ
- Cloud: AWS (K8s, Lambda, CloudFront)
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What I Do:
- Built a Payment App from scratch, bridging fiat and crypto rails.
- Implemented blockchain analysis tools to track multi-source transactions.
- Designed direct checkout flows with smart contracts for gasless NFT purchases using fiat.
- Developed On-ramp Aggregator integrating multiple global providers to optimize fees and success rates.
- Implemented Off-ramp systems using ERC-4337 to issue and manage virtual VISA/Mastercard.
- Set up and monitored infrastructure; implemented Infrastructure as Code using AWS SDK.
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Refs:
Sep 2021 - Apr 2022 /
Senior Backend Engineer
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What's it: Supremetech – Today.ly (A Visual Office for Remote Teams)
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Technologies:
- Language: TypeScript
- Frameworks: Express, React, Janus
- Database: PostgreSQL, Redis
- Cloud: AWS (K8s, Lambda, API Gateway)
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What I Do:
- Collaborated with UX researchers to identify gaps and improve user experience.
- Researched and implemented scaling solutions for WebRTC (Janus).
- Updated real-time services to support large groups across multiple API instances.
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Refs:
Jan 2018 - July 2021 /
Software Engineer
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What's it: BotStar – An Omnichannel Chatbots & Live Chat Application for SMBs
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Technologies:
- Language: TypeScript, Golang
- Frameworks: Fastify, Express, React, Angular2+
- Database: MongoDB, DynamoDB
- Cloud: AWS
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What I Do:
- Built omnichannel messaging systems with offline-first (PWA) capabilities.
- Designed scalable and configurable codebases.
- Improved concurrency handling for message editing and locking.
- Developed an end-to-end billing and subscription system using Stripe.
- Implemented real-time Google Sheets integration.
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Refs:
2017 - 2021 / Bachelor of Information Technology
- Institution: FPT University, Da Nang, Vietnam
- GPA: 3.2 / 4.0