Junior Java Software Engineer - Data Engineering

Quant Capital
London

Java Software Engineer – Data Engineering

Up to £70,000 + bonus and benefits

4:1 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 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:

Java (primary), Python (secondary), AWS, PostgreSQL + Git, CI/CD, logging/monitoring

What they want:

  • 2–5 years of experience building production systems (or equivalent ability)
  • Strong Java fundamentals (OO design, APIs/services, concurrency basics, testing)
  • Some UI development
  • 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

My client is based London. Home work is encouraged but you will need to be able to come to the City if needed.

Posted 2026-02-18

Recommended Jobs

School Librarian - Ealing, West London

Marchant Recruitment
London

School Librarian Location: Ealing, West London Salary: Competitive (Based on experience) Contract Type: Full-Time, Permanent Start Date: ASAP / Immediate The Opportunity Wayman E…

View Details
Posted 2026-03-06

Data Analyst - Private Lessons & Tutoring

FindTutors
London

Do you have experience as a Data Analyst and work with data on a daily basis? At FindTutors , we are looking for professionals who would like to share their skills by offering private lessons and…

View Details
Posted 2026-06-10

Corporate Tax Advisor

ProTalent Ltd
Central London

Corporate Tax Professional – London Location: London | Flexible Hybrid Working Ready to Take Your Corporate Tax Career Further? Are you a qualified Corporate Tax professional eager to shape …

View Details
Posted 2025-11-24

Microsoft 365 Sales Specialist

Advania UK
London

Microsoft 365 Sales Specialist Position Overview As a Microsoft 365 Sales Specialist you will lead initial customer conversations, align requirements to Microsoft 365 services and determine wh…

View Details
Posted 2026-03-25

Client Advisor - Kidswear

360 TALENT LONDON
London

Client Advisor - Luxury Childrenswear Luxury Department Store Full time 40 h £35/£38,000 + great commission Role Overview I'm seeking a passionate and experienced Client Advisor sp…

View Details
Posted 2026-06-18

Graduate / Junior Developer, Python, JavaScript, PHP - London

Noir
London

Graduate / Junior Developer, Python, JavaScript, PHP - London (Tech stack: Graduate / Junior Developer, Python, JavaScript, PHP, Graduate / Junior Developer) In 2012 our client launched a social me…

View Details
Posted 2026-04-13

Investment Management - Private Markets Distribution

Morgan Stanley
London

Investment Management - Private Markets Distribution  London About Private Markets Distribution The Private Markets Distribution (PMD) team is responsible for leading and driving all capital rai…

View Details
Posted 2026-04-06

Year 1 Teacher - Bexley

Marchant Recruitment
Bexley, Greater London

Are you an enthusiastic Key Stage 1 teacher looking for your next role? We are seeking a dedicated Year 1 Teacher to join a friendly and supportive primary school in Bexley . This is an excellent…

View Details
Posted 2026-01-21

After-school Nanny in N4, Job ID J20CEC

Little Ones UK Ltd
Harringay, Greater London

This family, based in Harringay, London, is looking for an After-school Nanny to care for their two children. All general Nanny duties are required in this role. A valid first-aid qualification is ne…

View Details
Posted 2026-04-30

Senior Business Support Officer

Lewisham Council
Lewisham, Greater London

Job Category: Admin / Clerical Location: Laurence House – First Floor, Lewisham Council Hours Per Week: 35.00 Start Date: Immediate Start Start Time: 09:00 End Time: 17:00 Salary…

View Details
Posted 2025-10-12