About the role
We're looking for a hands-on principal engineer to own technology for an early-stage fiat + crypto fintech wallet. You will own architecture, engineering, security, infrastructure, and technical strategy while remaining close to the code.
Responsibilities:
- Architecture: Own the end-to-end architecture for fiat/crypto wallets, payments, bank and P2P transfers, merchant payments, multi-currency systems, on/off ramps, and stablecoins.
- Core Financial Systems: Architect the double-entry ledger and transaction engine, ensuring idempotency, atomicity, reconciliation, accurate balances, auditability, and transaction traceability.
- Hands-on Engineering: Review/write code, design APIs and database schemas, architect distributed systems, and troubleshoot production issues.
- Security: Own authentication, authorization, encryption, API security, fraud controls, key management, custody, transaction signing, and HSM/MPC where applicable.
- Cloud and Reliability: Own production infrastructure across AWS, Kubernetes, Docker, Terraform, CI/CD, PostgreSQL, Redis, and Kafka, including observability, high availability, and disaster recovery.
- Integrations: Architect integrations with banks, payment gateways/processors, card issuers, KYC/KYB/AML providers, crypto custody, blockchain/RPC, and fraud and FX providers
- Compliance: Ensure technology supports KYC/KYB, AML, sanctions screening, transaction monitoring, Travel Rule, audit trails, data privacy, and regulatory reporting
- Engineering Leadership: Define technical strategy and engineering standards and build-vs-buy decisions; hire and mentor the engineering team and partner closely with Product, Risk, Compliance, and Operations.
Requirements:
- 10+ years in software engineering with senior technical leadership experience.
- Deep backend and distributed systems expertise.
- Built/scaled fintech, payments, banking, wallets, or financial transaction systems
- Strong experience with ledger/transaction architecture
- Strong cloud, security, and production architecture fundamentals.
- Experience hiring and leading engineering teams.
- Still technically hands-on, able to go deep into architecture and code.