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Java Software Engineer

Job in Greater London, London, Greater London, W1B, England, UK
Listing for: Quant Capital
Full Time position
Listed on 2026-02-17
Job specializations:
  • Software Development
    Data Engineer
Salary/Wage Range or Industry Benchmark: 100000 GBP Yearly GBP 100000.00 YEAR
Job Description & How to Apply Below
Location: Greater London

Up to £100,000 + bonus and benefits4:1 hybrid in office – City of London

Quant Capital is hiring for a small, high-performing market maker in London. This is a junior-to-mid role focused primarily on Java development, with a secondary responsibility owning straightforward Python ETL/data ingestion into AWS and Postgre

SQL. This si a growing team focused on data ingestion and building tooling for the wider firm.

What you’ll do:
  • Build and enhance Java backend services (APIs, batch jobs, integrations) used across the business
  • Write clean, testable code with solid engineering discipline (testing, code review, debugging, production support)
  • Maintain and extend Python-based ingestion/ETL (pragmatic plumbing, not heavy data engineering)
  • Work with Postgre

    SQL (schemas, migrations, performant queries, data validation)
  • Improve service reliability: monitoring/logging, sensible alerting, and predictable deployments via CI/CD

Tech:

What they want:
  • 2–5 years of experience building production systems (or equivalent ability)
  • Comfortable with SQL/PostgreSQL
  • Some Python experience (enough to manage and improve existing ETL/ingestion)
Nice to have
  • Any finance or markets exposure
  • Familiarity with common AWS patterns for running services and pipelines
Why this role
  • Broader scope than pure app dev: you’ll understand the data feeding the platform
  • Lean team, high impact, strong growth runway
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