Blockchain Security Engineer

Blockchain Security Engineer

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

Why Join Us:

At BIT, we tackle complex problems as a team. We encourage openness and promote transparency, respect, and inclusivity. Every team member is valued and has a voice that can be heard. We are always in search of intellectually curious and entrepreneurial individuals who are keen on making an impact in the crypto ecosystem and in building a better product for the next one billion users.

Job Responsibilities:

• Analyse how mainstream blockchain protocols work (Ethereum/EVM, Cosmos SDK, Substrate, Solana, etc.) and help redesign wallet systems based on secure cryptographic mechanisms.
• Develop hardening and mitigation plans against known protocol-level vulnerabilities and emerging risks.
• Contribute to the security-driven re-architecture of existing systems, including defence-in-depth for critical modules and clear trust boundaries.
• Write, debug, and test code for secure, high-performance systems under the guidance of senior engineers.
• Track emerging blockchain attack techniques and defences, and turn research into shippable improvements.
• Participate in security audits of internal systems and open-source dependencies, and drive remediation.
• Collaborate with cross-functional teams, document technical work, and share knowledge through design docs, code reviews, and tech talks.
• Take on ad-hoc technical tasks and projects as assigned.

Job Requirements

• Fresh graduate or up to 2 years of work experience, with a degree in Computer Science, Cryptography, Cyber Security, Engineering, Mathematics, or a related field. Master's degree preferred.

• Strong command of at least one of Java, Go, Rust, or C++. Python is a bonus.

• Solid foundation in data structures, algorithms, distributed systems, and concurrency.

• Familiarity with threat modelling, secure coding, penetration testing, and supply-chain security.

• A "zero trust" security mindset, with the ability to turn ambiguous requirements into clear technical designs.

• Strong analytical skills, eager to learn, and comfortable in a fast-paced environment.

• Good communication and teamwork skills, and able to communicate in both English and Mandarin.

• Internship, research, or project experience (e.g. CTFs, open-source, blockchain projects) is a plus.

• Location: United States California US

• Compensation: $84k - $180k estimated