We are a fast-growing fintech and crypto software company made up of elite builders moving quickly and pushing the boundaries of what's possible. We operate with a strong focus on speed, ownership, and high talent density , and we build critical infrastructure used at global scale. As a Blockchain Payments Engineer, you will act as a core architect and owner of mission-critical financial systems. You'll design and scale the infrastructure that powers seamless fiat crypto flows , real-time risk decisions, and highly reliable financial records. This is a hands-on, high-impact role at the centre of payments, compliance, and blockchain operations. Who You Are You are a backend and payments-focused engineer with a passion for high-throughput, low-latency distributed systems, fintech infrastructure, and blockchain-based financial products. You thrive in ambiguous environments and take full ownership of complex systems. Essential Qualifications Fiat Onramp Expertise: Proven experience building fiat onramps end to end. Systems Design & Scale: Deep experience designing and operating high-scale payments, fintech, or risk platforms. Programming Languages: Fluency in Rust or Go, or strong systems experience in TypeScript/Node or Python. Databases: Expert-level Postgres knowledge (transactions, indexing, locking), with experience using Redis and event/analytics stores (e.g., Kafka/Redpanda, ClickHouse). API Design: Strong command of REST/gRPC best practices, including auth, versioning, pagination, idempotency, and webhook consumers. Event-Driven Architecture: Experience with queues, outbox/inbox patterns, sagas, and exactly-once-effective processing. Security Mindset: Hands-on experience with key management, HSM/KMS, secrets hygiene, least-privilege access, and auditability. Ownership & Ambiguity: Comfortable moving fast, making decisions, measuring outcomes, and iterating in high-ambiguity environments. Nice to Have Payments experience: ACH/NACHA returns, 3DS/SCA, AVS/CVV, BIN analysis, chargebacks, mobile wallets. Open banking integrations and bank transfer initiation. Fraud and risk tooling: rule engines, device fingerprinting, feature stores, dispute workflows. Compliance tooling: sanctions and PEP screening, Travel Rule networks, SAR/STR workflows. Crypto operations: wallet infrastructure, stablecoin flows, blockchain analytics integrations. Accounting systems: double-entry ledgers, reconciliation pipelines, and regulatory/tax reporting data models. Infrastructure: Cloud platforms, infrastructure-as-code, containers/orchestration, CI/CD, observability tooling. For more information please contact Joseph@techchaintalent.xyz
Blockchain Payments Engineer • London, United Kingdom
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