Smart Contract Engineer

BIT Official; Singapore; On-site; SGD 180,000 - 240,000; Full time

Benefits offered by this job

Mentorship program

Networking with industry leaders

Vibrant culture

Job summary

BIT is building tokenized assets and on‑chain infrastructure to power digital asset finance. We seek a senior blockchain engineer with 5+ years of software development and 2+ years in smart contracts to own core modules across Ethereum, Solana, and Move-based chains.

You will design secure, gas-efficient contracts, enable multi-chain issuance, and work with OpenZeppelin standards, LayerZero, and CCIP integrations for institutional-scale products.

Qualifications

• Bachelor's degree in Computer Science or related field.
• 5+ years in software development with 2+ years in smart contracts.
• Strong proficiency in Solidity, Rust, or Move.
• Experience with multi-chain deployments and security practices.

Responsibilities

• Design, build, and ship core smart contracts for tokenized RWA products.
• Develop across Ethereum, Solana, and Move-based chains; enable cross-chain transfers.
• Implement upgradeable architecture and robust access control.
• Collaborate with DeFi protocols and integrate oracles and security audits.
• Ensure secure, gas-efficient code with comprehensive tests and monitoring.

Education

Bachelor's degree in Computer Science

Tools

Hardhat

Foundry

Anchor

Sui CLI

OpenZeppelin

Job description

BIT (formerly Matrixport) is a global digital asset financial services and infrastructure group. Headquartered in Singapore and founded in 2019, BIT bridges traditional finance and digital assets through governance-driven financial services and technology.

The firm manages over US$7 billion in assets and facilitates more than US$7 billion in monthly trading volume. BIT offers services including custody, trading, asset and wealth management, liquidity and financing solutions, and tokenised real-world assets (RWA), serving institutional and professional investors globally.

BIT Group entities maintain a licensed and regulated footprint across Singapore, Hong Kong, Switzerland, the United Kingdom, the United States and Bhutan.

For more information, visit www.bit.com

Kickstart Your Journey at BIT:

At BIT, we come together as a dynamic team to tackle exciting challenges head-on, creating an environment bursting with openness, transparency, and inclusivity. Every graduate is a vital part of our mission, and your ideas will always be valued. We’re searching for passionate, intellectually curious, and entrepreneurial individuals ready to make a real impact in the crypto ecosystem and help create innovative products for the next billion users.

• Make a Difference in the Future of Web3!
• Gain Hands-On Experience with Cryptocurrencies!
• Mentorship and Networking with Industry Leaders!
• Join a Fun, Vibrant, and Engaging Culture!

About the Team

Matrixdock is a real-world asset (RWA) tokenization platform, offering tokenized gold (XAUm), tokenized silver (XAGm), and a short-term treasury bill token (STBT). XAUm is fully backed 1:1 by LBMA-accredited gold bars of 99.99% purity and is live on Ethereum, BSC, Solana, Sui, and other major chains. You will join the core smart contract team and own the on-chain systems that carry real assets.

Responsibilities

• Design, build, and ship the core smart contracts for our tokenized RWA products
• Build and maintain protocol implementations across EVM chains (Ethereum / BSC / Tron) and non-EVM chains (Solana / Sui / Stellar), adapting the design to each chain’s native model, and enable multi-chain issuance and cross-chain transfers through messaging protocols such as LayerZero and CCIP
• Build the contract security and governance framework — access control, timelocked operations, and upgradeable architecture (UUPS proxy) — ensuring safe, controlled upgrades and backward-compatible storage layouts
• Develop a deep understanding of leading DeFi protocols (e.g., Uniswap, Aave) and own third-party protocol integrations
• Write secure, gas-efficient contract code with high test coverage; drive third‑party security audits and remediate findings
• Build on‑chain monitoring and operations tooling to detect anomalous events, especially around fund‑sensitive operations such as minting and burning
• Stay current with EIPs, new chain features, and industry security incidents; evaluate and integrate relevant advances into our stack
• Contribute to the overall architecture of our blockchain systems and provide technical guidance to team members
• Bachelor’s degree or above in Computer Science or a related field; 5+ years of software development experience, including 2+ years in smart contract development
• Strong proficiency in at least one major blockchain platform such as Ethereum, Solana, or Sui, with hands‑on smart contract development in Solidity, Rust, or Move; deep understanding of your chain’s execution model, gas mechanics, and storage layout; practical experience with upgradeable contracts, including performing live upgrades
• Proficiency with the mainstream development frameworks for your chain (e.g., Hardhat / Foundry, Anchor, Sui CLI), with solid engineering practice across testing, fuzzing, deployment, and on‑chain verification
• Deep understanding of smart contract security best practices; able to identify and prevent common attacks such as reentrancy, access‑control bypass, price manipulation, and front‑running; experience working with security auditors and remediating findings
• Familiarity with the OpenZeppelin contracts library and the design principles behind security components such as AccessControl, TimelockController, and Pausable
• Solid understanding of DeFi building blocks: AMMs, oracles, and asset‑pegging mechanisms
• Working knowledge of digital signatures and on‑chain signature verification (e.g., EIP-712, replay protection), plus a good grasp of blockchain fundamentals
• A strong sense of ownership — able to own core modules end‑to‑end with minimal supervision and help shape the product’s technical direction
• A strong communicator, with the ability to write clear technical documentation
• A security‑first mindset: rigorous, detail‑oriented, and ready to be accountable for institutional‑grade asset contracts

Nice to Have

• Experience building contracts for reserve‑backed or pegged assets (e.g., PAXG, XAUt, wBTC, USDC), stablecoins, or RWA projects
• Familiarity with at least one non‑EVM stack — Rust (Solana Anchor / Soroban) or Move (Sui / Aptos); experience shipping one protocol across multiple chains is a strong plus
• Familiarity with cross‑chain messaging protocols such as LayerZero, Wormhole, CCIP, or Axelar
• Experience with DEX integrations or concentrated liquidity market making (CLMM)
• Public audit reports, bug bounty records, CTF achievements, or open‑source contract projects
• Experience integrating oracles such as Chainlink (e.g., Proof of Reserve) and implementing safeguards against price manipulation
• Professional fluency in English for direct communication with audit firms and ecosystem partners

Embrace the opportunity to thrive and grow with us as we shape the future together at BIT!

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