Job Description
The position focuses on card payment solutions and requires expertise in developing and maintaining card payment systems. The role involves working on core business functionalities and ensuring the reliability and efficiency of payment processing systems.
Key Responsibilities
- Core Business Development: Responsible for Golang backend development of the company's card payment/issuing systems, including but not limited to card issuance, card accounts, authorization, clearing & settlement, transaction processing, billing, and benefits modules.
- Card Transaction Chain Construction: Participate in the design and development of the entire card transaction chain, handling core processes such as authorization, reversal, capture, refund, and reconciliation.
- Architecture Design & Optimization: Contribute to system architecture design, participate in understanding/migrating legacy systems, and continuously iterate and optimize performance to ensure high availability, consistency, and stability of financial systems.
- Technical Problem-Solving: Address technical challenges and bottlenecks in system operations, improving system throughput and response speed to ensure fund security and data accuracy under high concurrency.
- Quality Assurance: Produce standardized technical documentation, maintain strict code quality control, conduct code reviews, and develop unit/integration test cases.
Job Requirements
- Basic Qualifications:
- Bachelor's degree or higher in Computer Science or related field, with 3+ years of Golang/Java development experience.
- Experience in card issuing systems, card payment systems, or card transaction processing (strong relevance preferred).
- Understanding of crypto fundamentals; prior experience in crypto transactions/payments is a plus.
- Technical Skills:
- Proficiency in Golang/Java, concurrent programming, Linux operations, data structures, Kubernetes, and computer networks.
- Strong knowledge of MySQL (including SQL performance tuning) and Redis (with solutions for cache breakdown, penetration, and avalanche). Experience with Kafka for system decoupling and asynchronous processing.
- Familiarity with microservices architecture, gRPC, Protobuf, and microservices governance (service registration/discovery, circuit breaking, rate limiting, distributed tracing).
- Experience with Docker, Kubernetes, and CI/CD pipelines.
- Ability to leverage AI tools like Claude Code/Codex to enhance workflow efficiency.
- Preferred Qualifications:
- Experience in Crypto Card/payment application risk control.
- Background in licensed card issuers, acquirers, third-party payments, or Card Processor systems.
- Familiarity with ISO 8583/ISO 20022 messaging or integration with card networks/issuing partners.
- Knowledge of crypto deposits/withdrawals, Crypto Cards, or fiat on/off-ramp services.
- Understanding of PCI-DSS compliance and payment security standards.
- Experience in building payment systems from scratch or migrating core systems.
Benefits
Bonus, health check-ups, commercial insurance, tenure gifts, marriage & childbirth bonuses, and more.
