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
AAT Trainee Accountant - 2026 School Leaver Programme -...
Are you looking to start a career in accountancy? Would you like to study for a fully sponsored globally recognised accounting qualification through award winning training providers whilst gaining …
Maths Teacher (ECT) - Brent Outstanding School
School Status & Location Sector: Outstanding Ofsted Secondary School (with Sixth Form). Borough: Brent (Inner London, England) Start Date: Permanent, full-time role commencing January or Apri…
Teacher of English - Independent School in Harrow
A prestigious Independent School in Harrow is seeking a permanent, full-time English Teacher to join their faculty in January 2026. This crucial role offers excellent facilities and the chance to pro…
Midday Meal Supervisor | Immediate Start
Midday Meal Supervisor | Immediate Start Friendly Primary School – Barnet Long-Term, Term-Time Role We are working with a welcoming and inclusive primary school in Barnet that is looking f…
HPC Operations Lead
Lead the systems that power discovery. Behind every breakthrough in modern science sits the computational infrastructure that makes it possible. The platforms, clusters and storage environments tha…
Reception Teacher
A welcoming and inclusive primary school in West Drayton is seeking a Reception teacher to join the team from September 2026 on a permanent basis. This role would suit a teacher who enjoys supporting…
Warranty Administrator
Warranty Administrator Role: To ensure accurate submissions of warranty and goodwill claims on a daily basis and monitor warranty reports Ensure all administrative functions within the wa…
General Manager in - UK's number 1 gym!
General Manager in North London - UK's number 1 gym! £42k basic plus £8k bonuses structure + Benefits include ability to Personal Train to top up income. We are recruiting for a this fitness job…
Finance Officer - Secondary School - Barnet
Location: Barnet, North London Start Date: January 2026 Salary: Support staff pay scale, dependent on experience A well-organised secondary school in Barnet is seeking a Finance Officer to…
Physical Education Teacher - Good Secondary School,...
Physical Education Teacher – Good Secondary School, Redbridge Start Date: As soon as possible Contract: Full-time, Permanent Salary: Paid to scale School information: This is an 11 …