Senior Full Stack

5 days ago

greater london england United Kingdom, England JUXT Full-time £110,000 - £150,000

Senior Full Stack Engineer – Java/Kotlin&React

We are partnering with a Tier 1 investment bank on a major, multi-year transformation of its Prime Finance Equities platform.

The Equity Accelerator programme is re-engineering core trading and post-trade systems, replacing legacy architecture with modern event-driven, cloud-native technology and delivering advanced capabilities includingcross-margining and credit financing.

This is a genuine engineering role working on live, financially critical systems— not a greenfield project or generic Java delivery.

What you'll be doing

  • Build Java/Kotlin event-driven services and modern React/TypeScript applications
  • Modernise complex legacy trading and post-trade systems
  • Design for failure handling, ordering, replay and data integrity
  • Apply TDD across unit, integration and E2E testing
  • Work with Kafka, Solace, TIBCO EMS, SQL Server&MongoDB
  • Build and deploy using Docker, Kubernetes/OpenShift&CI/CD
  • Work with OpenTelemetry, ELK&Grafana
  • Use AI-assisted/agentic coding toolsfor legacy analysis, testing and refactoring
  • Kotlin experience or willingness to learn
  • Event-driven / message-passing / event-sourcing experience
  • Redux, WebSockets and API integration
  • Genuine hands‑on TDD experience
  • Background in capital markets, trading or post-trade
  • Experience with iterative delivery, trunk-based development and CI/CD
  • Senior-level autonomy and strong architectural instincts

Prime Brokerage, Synthetic/Swap or Cash Equities experience, plus exposure to Corporate Actions, 871(m), EMIR, MiFID, Kafka, SQL Server, Kubernetes/OpenShift or cloud-native platforms.

*We cannot offer sponsorship for this role*

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