Lead Backend Engineer — Capital Network (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 core capital network systems including deposit, withdrawal, transfer, total balance, Travel Rule & AML, and Earn. Responsibilities • Design, develop, and optimize core systems for deposit / withdrawal, transfer, Travel Rule compliance, and AML risk control; • Build and maintain multi-chain (ETH / BTC / TRX / SOL, etc.) fund processing pipelines, ensuring fund-level correctness; • Analyze system bottlenecks, resolve complex issues, and perform performance tuning; • Explore cutting-edge technologies and solutions to strengthen technical capabilities. 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; • 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 deposit / withdrawal / transfer systems at a crypto exchange; • Familiarity with blockchain transaction lifecycles and multi-chain ecosystems (EVM / Solana / TRON, etc.); • Knowledge of Travel Rule protocols or AML detection workflows.