Lead Backend Engineer — Compliance & KYC (Go)

ABFinance is a US-based firm building digital finance for the future. Our vision is to create a full financial ecosystem where digital assets, traditional finance, and everyday money management live in one seamless experience that is made available to everyone. Founded by a team of innovators, traders, and compliance professionals, our mission is to bring digital assets to the mainstream through secure, regulated products. Our flagship ecosystem combines a compliant, security-first crypto exchange serving both retail and institutional clients, alongside a Debit Card that enables everyday spending and smooth bridging between fiat and digital assets, supported by core capabilities such as spot trading and yield generation products. Role Overview Responsible for architecture design and development of compliance technology systems including full KYC lifecycle, AML engine, compliance wall, ban services, and compliance content detection — ensuring stable and compliant platform operation. Responsibilities • Design, develop, and optimize the full KYC lifecycle, AML engine, and compliance wall rule engine; • Build and maintain compliance onboarding workflows and account migration processes; • Develop a compliance content detection center combining rule engines with LLM workflows; • Analyze system bottlenecks, resolve complex issues, and perform performance tuning. Requirements • Bachelor's degree or above in Computer Science or a related field; • 5+ years of backend development experience, with 2+ years of Golang architecture experience; • Proficient in Golang frameworks, language features, and data structures, with deep understanding of internals; • Proficient in gRPC / HTTP API development with solid understanding of concurrency and experience with high-concurrency systems; • Familiar with distributed systems; proficient in Kafka, gRPC and other mainstream middleware, with understanding of underlying principles; • Experience designing and developing rule engines or workflow engines; • Hands-on experience with Claude Code for AI-driven development; • Strong logical thinking and business comprehension skills; good coding habits with clear structure and naming conventions; • Docker and Kubernetes experience preferred. Nice-to-Haves • Experience developing KYC / AML systems or compliance platforms at a crypto exchange; • Experience integrating third-party compliance vendors (Sumsub, Chainalysis, etc.).