Staff Software Engineer - Payment Processing

London. Posted 4 days ago

The role

You will set the technical direction for the Gateway, Routing and Payout platforms. You will own the architecture of high-throughput, low-latency distributed systems and lead technical decisions from design to production rollout.

What you will do

Own the architecture of high-throughput, low-latency distributed systems
Design for resilience including redundancy, graceful degradation, backpressure, idempotency and recovery
Set and defend non-functional requirements like availability, latency, throughput and data durability
Lead technical decisions from problem framing through to production rollout and decommissioning
Drive operational excellence through observability, alerting, capacity planning, load and chaos testing
Raise the engineering bar through design reviews, code review, pairing and mentorship
Partner with product, platform and other engineering teams to sequence delivery
Make pragmatic build-versus-buy and refactor-versus-rewrite calls

Required qualifications

Significant experience building and operating distributed backend systems in production
Track record of technical leadership across multiple teams
Demonstrable experience designing for high throughput and low latency
Deep understanding of resilience patterns in distributed systems
Strong proficiency in either .NET or Java
Experience with event-driven and streaming architectures
Experience with relational and non-relational data stores at scale
Hands-on experience with cloud-based application development (AWS & Azure), containers, orchestration and infrastructure as code
Experience owning production systems on call
Experience leading complex migrations or re-architectures of live, business-critical systems
Excellent communication skills

Nice to have

Experience in payments, financial services or another domain with strict correctness, auditability or regulatory requirements
Experience with multi-region or active-active architectures, including data replication and failover strategies
A history of mentoring engineers into senior and staff-level roles

About the company

Checkout.com enables over 10 billion transactions yearly for more than one billion global shoppers. The company has 20 offices across six continents with London as HQ.