Junior Java Software Engineer - Data Engineering
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.
Recommended Jobs
Consultant Paediatrics - General Paediatrics
Consultant Paediatrics - General Paediatrics – East London , UK Empire Locums is currently recruiting for a Consultant Paediatrics - General Paediatrics to join one of the North West’s most adv…
Band 7 CT Radiographer - West London
Job Title : CT Radiographer Banding: Band 7 Locat io n: West London Start date: ASAP Duration: Ongoing Rate : £32-33per hour Working hours: 0800-2000 or 0900-1700 An excellent oppor…
Enfield Outstanding School - Teacher of Maths (ECT)
School Status & Location Sector: Outstanding Ofsted-rated Secondary Academy. Borough: Enfield (Outer London). Start Date: Permanent, full-time role commencing January 2026. The Opportun…
Teaching Assistant - Secondary Academy
A well-regarded secondary academy in London is seeking a caring and committed Teaching Assistant to join its support staff team. The Role You will work closely with teaching staff to support …
Teaching Assistant
Location: London Start Date: January 2026 Salary: Competitive support staff salary A welcoming primary and secondary school setting in London is seeking a Teaching Assistant to support stu…
Primary Teaching Assistant in St John's Wood
Teaching Assistant role - NW London If you want to make a difference and have a real impact on the lives and development of children, this Primary Teaching Assistant position is for you! An…
Research Integrity Auditor Specialist
Who we are At Frontiers, our purpose is simple yet ambitious: to make science open. We believe open science empowers the global scientific community to accelerate discovery and develop the solutio…
Danish speaking Junior Client Service Coordinator (Finance)
A Danish speaker is urgently needed for a financial services company to support their growing multilingual Sales Team. You will be based in a stunning office in Canary Wharf, London providing your ex…
Senior Data Engineer (f/m/d)
About the Opportunity We’re looking for a Senior Data Engineer to help design, build, and scale modern data solutions that power analytics, operational reporting, and business decision-making…
Category Buyer - Indirect | Food Services Organisation
This is an exciting opportunity, with clearly defined career pathways and progression opportunities to support you in your long-term career aspirations. This role is pivotal in implementing successfu…