Senior Java Backend Engineer | Data Ingestion & AWS ETL

Quant Capital; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

Quant Capital in London is seeking a mid-to-senior Java developer to build and enhance backend services, APIs, batch jobs and system integrations. You will own the data ingestion layer and contribute to tool building for the wider firm.

The role requires 10+ years producing production systems, strong SQL/PostgreSQL, and at least some Python for ETL work. A lean, high-impact team offers growth and exposure to AWS patterns and data-driven platforms.

Qualifications

• 10+ years of experience building production systems.
• Strong SQL and PostgreSQL skills.
• Some Python experience to manage and improve ETL/integration.
• Ability to work in a small, high-performance market-making team.

Responsibilities

• Build and enhance Java backend services (APIs, batch jobs, integrations).
• Write clean, testable code with solid engineering discipline.
• Maintain Python-based ingestion/ETL and AWS-based data flows.
• Work with PostgreSQL schemas, migrations, and data validation.
• Improve service reliability with monitoring, logging, and CI/CD deployments.

Skills

Java

Backend development

SQL / PostgreSQL

Python

Tools

PostgreSQL

AWS

CI/CD

Job description

Quant Capital in London is seeking a mid-to-senior Java developer to build and enhance backend services, APIs, batch jobs and system integrations. You will own the data ingestion layer and contribute to tool building for the wider firm.

The role requires 10+ years producing production systems, strong SQL/PostgreSQL, and at least some Python for ETL work. A lean, high-impact team offers growth and exposure to AWS patterns and data-driven platforms.