Staff Software Engineer - Scale & Resilience Lead

Checkout Ltd; Greater London; Hybrid; GBP 120,000 - 150,000; Full time

Job summary

Checkout.com, founded in London, seeks a Staff Engineer to set the technical direction for payments-scale systems. You will own architecture for high-throughput distributed services, shaping data models and integration patterns to scale with demand.

You will lead critical decisions end-to-end, drive operational excellence through observability and capacity planning, and ensure resilience and availability across the stack. This is a senior role for engineers who thrive at scale.

Responsibilities

• Own the architecture of high-throughput, low-latency distributed systems, defining the service boundaries, data models and integration patterns that let them scale by an order of magnitude
• Design for resilience from first principles - redundancy, graceful degradation, backpressure, idempotency and recovery - so that partial failures never become customer-facing outages
• Set and defend the non-functional requirements that matter: availability targets, latency percentiles, throughput ceilings, data durability and recovery objectives
• Lead the hardest technical decisions end to end, from problem framing and design review through to production rollout, migration and decommissioning of what came before
• Drive operational excellence by improving observability, alerting, capacity planning, load and chaos testing

Job description

Checkout.com, founded in London, seeks a Staff Engineer to set the technical direction for payments-scale systems. You will own architecture for high-throughput distributed services, shaping data models and integration patterns to scale with demand.

You will lead critical decisions end-to-end, drive operational excellence through observability and capacity planning, and ensure resilience and availability across the stack. This is a senior role for engineers who thrive at scale.