JUXT

Senior Full Stack (Java/Kotlin/React/TS) Engineer

London

Posted about 14 hours ago

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🚀Senior Full Stack Engineer – Java/Kotlin&React

📍London | Hybrid
🏦Tier 1 Investment Bank | Prime Finance

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 including cross-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
Develop real-time user experiences using WebSockets
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 tools for legacy analysis, testing and refactoring

Reasons to use Rodeo

I’m in my final year doing Economics and I don’t know whether to apply for grad schemes now or do a masters first. What do you think?

Honest answer — it depends on where you want to end up. A lot of top grad schemes (Big 4, civil service, banking) don’t need a masters. Let’s look at the ones you’d be competitive for now, and we can decide if a masters actually adds anything.

Also worth knowing: most autumn 2026 applications are open now. Timing matters more than you think.

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🎯 We're looking for

Strong Java/JVM engineering experience
Kotlin experience or willingness to learn
Strong React + TypeScript production experience
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

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⭐ Desirable

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.

If you're a senior full-stack engineer looking to work on complex financial technology with real business impact, I'd be keen to speak.

We cannot offer sponsorship for this role

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Location

London, England, United Kingdom