[Hiring] Senior/Staff Backend Payments Engineer @Plasma

Role Description

As a Senior Backend Payments Engineer, you will operate at the system level. You’ll help define how our payments architecture works end-to-end, from transaction lifecycle and reconciliation to failure handling, observability, and scale. This is not a narrow execution role. You will shape architecture, influence standards, and raise the technical bar across the team.

We build our backend primarily in TypeScript. You should love writing clean, high-quality TypeScript and care deeply about correctness, reliability, and maintainability.

• Build and own critical backend systems in TypeScript that power payments, balances, settlement, and reconciliation.
• Design reliable money movement flows with strong guarantees around idempotency, consistency, and failure recovery.
• Lead technical architecture across the payments domain, including system boundaries, data models, and operational strategy.
• Work closely with product, compliance, and infrastructure to ship financial primitives that hold up under real-world use and real-world scrutiny.
• Define how we handle edge cases: partial failures, retries, timeouts, chargebacks, reversals, and reconciliation gaps.
• Raise the bar on engineering quality: code standards, testing strategy, monitoring, and incident response.
• Mentor engineers and drive technical clarity across the team, especially in complex or ambiguous areas.
• Help make stablecoin payments feel boring in the best possible way: fast, predictable, and trustworthy.

Qualifications

• A senior, hands-on backend engineer with a track record of shipping and owning production systems.
• Deep experience building backend services in TypeScript (Node.js) and strong engineering instincts around reliability and correctness.
• Comfortable taking systems from zero to one, and then scaling them without losing clarity.
• Strong judgment around tradeoffs: speed vs safety, abstraction vs control, simplicity vs flexibility.
• You think in systems: APIs, state machines, data integrity, observability, and operational risk.
• You communicate clearly, write clean code, and can lead through technical decisions.
• You have solid experience building payments, ledgering, or financial infrastructure.

Requirements

• Fintech, banking, or crypto-native background (nice to have).
• Experience designing event-driven systems (queues, workflows, asynchronous processing) (nice to have).
• Familiarity with stablecoins, custody, settlement, and blockchain transaction lifecycles (nice to have).
• Experience working close to launch and still shipping smoothly (nice to have).

Benefits

• Above market salary plus token compensation.
• Premium health insurance for you and your family fully covered by Plasma.
• Monthly wellness budget, whether for the gym, therapy, sauna & massage.
• A beautiful London HQ with gym access and daily food, for those who thrive in an office environment.
• All the tools and tech you need to operate at your best.
• Visa sponsorship and relocation support if you are joining the London office from abroad.
• Ownership. We look after you.