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
Apprentice Building Manager
Role type: Apprenticeship- 24 Month Contract Location: London- On-Site Global University Systems (GUS) is an international education group that empowers students to transform their lives thro…
Data Analyst (Business object and NEC) (Band 6c)
Job Category : IT Location : Sutton Gate, Sutton Housing Partnership Hours Per Week : 36.00 Start Date : Immediate Start Start Time : 09:00 End Time : 17:00 Salary: £28.48 Sutton Hou…
Account Director (Hiring Immediately)
Company Description Wavenet is an award-winning communications solution provider, delivering high-quality, high-speed and cost-effective connectivity solutions to organisations across the UK. Ou…
Paralegal/Legal Operations Assistant/Legal Tech Assistant
This temporary position in London is an opportunity to support the disputes team of a large law firm. You'll assist with a range of tasks that keep legal operations running smoothly, making a real di…
Complex Needs Teaching Assistant
COMPLEX NEEDS TEACHING ASSISTANT – 1:1 SUPPORT High Barnet | Full-Time | Immediate Start Are you an experienced Complex Needs TA, SEN TA, Behaviour Support Assistant or Support Worker looking fo…
Technical Product Owner
Investec – Where Out of the Ordinary Happens At Investec, we do things differently. We're a leading international bank and wealth manager built on a culture of curiosity, entrepreneurial spirit an…
Technical Director
About the Role Role Overview The Technical Director will become the senior technical authority for key projects at our Vyner studio, ensuring success in delivering products and service…
Software Engineer - Calibration
Woven by Toyota is enabling Toyota’s once-in-a-century transformation into a mobility company. Inspired by a legacy of innovating for the benefit of others, our mission is to challenge the current st…
Early Years Quality Specialist
Job Title: Early Childhood Specialist Contract Type: Full Time / 40 Hours per week / Field based Salary: From £45k per annum plus £4k car allowance (If required) * Regional travel require…
Support worker
The AICS Group specialises in providing community-based rehabilitation and support to our clients who have a brain injury, cerebral palsy, spinal injuries, learning disabilities, complex behaviour, li…