Principal Software Engineer

London - 4 days onsite

£110k - £140k + Benefits

We're hiring for one of the UK's fastest growing fintech scaleups, where reliability is a competitive advantage not a luxury. As a Principal Software Engineer you will be providing deep technical leadership alongside being extremely hands on as part of a platform team. Principal Engineers will set technical directions, drive engineering standards and strategy while remaining deeply Embedded in implementation and operational excellence.

Responsibilities:

• Architect and implement highly available, multi-region infrastructure services
• Define resilience patterns across services (failover, circuit breaking, back-pressure, etc.)
• Lead large-scale refactoring or reliability improvement initiatives
• Establish best practices in incident response, observability, and SLO management
• Drive adoption of modern cloud-native and GitOps practices
• Mentor senior engineers and influence engineering culture at scale

Skills Required:

• Strong Back End engineering ability (Go, Java or .NET)
• Extensive hands on expertise designing and operating high scale distributed systems
• Deep expertise in cloud native architecture (GCP/AWS)
• Advanced Kubernetes and container orchestration expertise
• Proven track record of mentoring and technical leadership.

Why this role:

• You'll get the opportunity to influence architecture across a multi country product.
• You'll work in an engineering led organisation where technical excellence drives business success
• Have the opportunity to remain hands on while shaping long term platform best practices.

We are an equal opportunities employer and welcome applications from all suitably qualified persons regardless of their race, sex, disability, religion/belief, sexual orientation or age.