About BIT:
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:
- Core Business Development: Responsible for Golang backend development of the company's card payment and card issuing systems, including but not limited to card issuance, card accounts, authorization, clearing & settlement, transaction processing, billing, rewards/benefits, and other related business modules.
- Card Transaction Lifecycle: Participate in the design and development of the end-to-end card transaction lifecycle, with a solid understanding of and hands-on experience with core transaction flows such as Authorization, Reversal, Capture, Refund, and Reconciliation.
- Architecture Design & Optimization: Participate in system architecture design, legacy system analysis and migration, continuous iteration and performance optimization, ensuring high availability, strong consistency, and stability of financial systems.
- Technical Problem Solving: Identify and resolve technical challenges and system bottlenecks, improve system throughput and response time, and ensure fund security and data accuracy under high-concurrency transaction scenarios.
- Engineering Quality: Maintain high-quality technical documentation, enforce code quality standards, conduct Code Reviews, and develop unit and integration test cases.
Job Requirements:
- Bachelor's degree or above in Computer Science or a related field, with 3+ years of experience in Golang and/or Java development.
- Hands-on experience in card issuing systems, card payment systems, or card transaction processing systems; directly relevant experience is highly preferred.
- Basic understanding of crypto fundamentals and how crypto systems operate; experience in crypto trading or payments is a plus.
- Strong proficiency in Golang and/or Java, with a solid understanding of concurrent programming. Proficient in Linux and possessing a strong foundation in data structures. Familiarity with Kubernetes (K8s), computer networking, and related technologies.
- Strong proficiency in MySQL, with the ability to perform SQL performance tuning. Proficient in Redis and other caching technologies, with a good understanding of common solutions for cache breakdown, cache penetration, and cache avalanche.
- Familiar with microservices architecture and proficient in gRPC and Protobuf. Understanding of microservice governance, including service registration and discovery, circuit breaking, rate limiting, and distributed tracing.
- Familiar with containerization technologies such as Docker and Kubernetes, as well as CI/CD processes.
- Proficient in tools such as Claude Code and Codex, with the ability to integrate AI into daily development workflows to improve efficiency and create valuable, reusable workflows.
Preferred:
- Experience in risk control/fraud prevention for Crypto Card or payment applications is preferred.
- Experience developing systems for licensed card issuers, acquiring institutions, third-party payment providers, or Card Processors.
- Familiarity with ISO 8583 / ISO 20022 messaging, or experience integrating with card networks or card-issuing partners.
- Experience with crypto deposits/withdrawals, Crypto Cards, or fiat on/off-ramp products and business processes.
- Familiarity with PCI-DSS and other payment compliance and security standards.
- Experience building payment systems from 0 to 1 or migrating core payment systems.
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