Senior Platform Engineer – Scalable, Event-Driven Systems

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

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