Senior Software Engineer

About the Position

Senior Software Engineer

We are seeking a Senior Software Engineer-Platform Services to drive our core platform ecosystem in London. In this role, you will drive technical excellence across dual-stack (Node.js/TypeScript and Java/Kotlin) distributed systems.

Responsibilities

• Own and operate platform services that include customer and developer portals and centralised document management plus other cross-cutting services
• Lead architectural decisions across the platform
• Mentor engineers and drive technical quality
• Maintain and evolve engineering standards, shared libraries, service templates, API/event specifications, and Kafka integration patterns
• Own performance and reliability: distributed tracing, benchmarks, latency optimisation, incident response
• Continue Keycloak migration and identity infrastructure work
• Lead development of developer portal and internal tooling

Requirements

• 10+ years backend engineering with distributed systems at scale
• Strong in Node.js/TypeScript and Java/Kotlin
• Kafka and event-driven architecture
• AWS, Kubernetes, Docker in production
• Postgres, Elasticsearch, observability tooling (Datadog, Elastic APM)
• Financial services or other regulated/high-reliability environments

Nice to Have

• Identity/auth experience: Keycloak or similar, OAuth 2.0, OIDC, SAML
• Zero-downtime migration experience
• Developer experience/platform tooling (Backstage, service templates, DORA metrics)
• Technical leadership or product ownership of platform services

We Offer

• Competitive salary
• Opportunity to work in a challenging and rewarding role
• Professional growth and development

About the Company

WSD is an employer that values diversity. We highly encourage applications from appropriately qualified and eligible candidates irrespective of age, race, religion, national origin, gender, sexual orientation, gender identity and/or expression, veteran status, disability, or any other status protected by applicable law.