Outside IR35 (6 month rolling) 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 PostgreSQL. This is 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 PostgreSQL (schemas, migrations, performant queries, data validation)
* Improve service reliability: monitoring/logging, sensible alerting, and predictable deployments via CI/CD
Tech:
What they want:
* 10+ 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
#J-18808-Ljbffr