Senior Software Engineer

Wallstreetdocs Ltd; Greater London; On-site; GBP 100,000 - 140,000; Full time

Job summary

Wallstreetdocs Ltd. is seeking a Senior Software Engineer-Platform Services to drive our core platform ecosystem.

In this role, you will own and operate platform services, including customer and developer portals and centralized document management, while leading architectural decisions across a dual-stack of Node.js/TypeScript and Java/Kotlin distributed systems. You will mentor engineers, improve performance and reliability, and contribute to identity infrastructure work such as Keycloak

Qualifications

• 10+ years backend engineering experience with distributed systems.
• Proficiency in Node.js/TypeScript and Java/Kotlin.
• Experience with Kafka and event-driven architectures.
• Production experience with AWS, Kubernetes and Docker.
• Experience with Postgres and Elasticsearch.
• Familiarity with observability tools such as Datadog or Elastic APM.
• Experience in financial services or other regulated/high-reliability environments.

Responsibilities

• Own and operate platform services including portals and centralized document management.
• 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 optimization, incident response.
• Continue Keycloak migration and identity infrastructure work.
• Lead development of developer portal and internal tooling.

Skills

Node.js/TypeScript

Java/Kotlin

Kafka

AWS

Kubernetes

Docker

PostgreSQL

Elasticsearch

Observability (Datadog/Elastic APM)

Regulated environments

Tools

Keycloak

Backstage

Job description

About the Role

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

Job Role

• 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

Responsibilities

• 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

Required experience

• 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

Desirable

• 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

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,veteranstatus, disability, or any other status protected by applicable law.