Java Developer – Data

Overview

In this mid-to-senior role, you will primarily develop Java backend services while owning straightforward Python ETL/ingestion tasks into AWS and PostgreSQL. You’ll join a growing data-focused team building tooling for the wider firm and improving platform reliability. You’ll work across APIs, batch jobs, and data pipelines to support data-driven decisions in a fast-paced trading environment. This is an opportunity to shape data infrastructure in a lean, high-impact team with clear growth potential.

Pay / Benefits

• competitive base salary
• performance-based bonus
• in-office in City of London
• opportunity to grow with a high-performing market maker
• data-focused role with broad scope
• strong growth runway

Responsibilities

• Build and enhance Java backend services (APIs, batch jobs, integrations)
• Write clean, testable code with strong engineering discipline (testing, code reviews, debugging, production support)
• Maintain and extend Python-based ingestion/ETL
• Work with PostgreSQL (schemas, migrations, performant queries, data validation)
• Improve service reliability through monitoring/logging and CI/CD deployments

Key requirements

• 10+ years of experience building production systems (or equivalent)
• Strong Java fundamentals (OO design, APIs/services, concurrency, testing)
• Some UI development
• Comfortable with SQL/PostgreSQL
• Some Python experience (ETL/ingestion)

• Java
• Python
• AWS
• PostgreSQL
• Git
• CI/CD