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FoundryOS

Back-End Engineer

FoundryOS
United Kingdom · Full-time · Entry

At FoundryOS, we're big believers in autonomous teams and iterative development. We're crazy about continuous improvement and knowledge sharing, and we want people who share our enthusiasm.

We strive to always build the right thing and build the thing right, so we place great emphasis on understanding exactly what our clients need and delivering quality products that exceed their expectations. 

We think that high performing teams operate best through a model of build-it and run-it that comes from a deep curiosity about how our products work and how our clients use them. We use this foundation to build comprehensive product knowledge and industry expertise, but we're not dogmatic about it.

We operate in multiple build squads that operate independently but align to the same goals and ways of working.  We recognise that different drives guide our roadmaps from client needs to commercial strategy to regulatory change and managing those dependencies are made through aligned team decisions.

We make client success everyone's business — what we are going to do and how we do it are team decisions. 

We strongly believe that you grow expertise through hands-on experience, rather than just theoretical knowledge, so our approach to product leadership is designed to give you deep exposure to our products, our clients, and the fintech industry really fast. And really often.

We build our product and tech function with focus on:

  • Understanding FoundryOS capabilities, industry needs and client use cases

  • Quality is at the heart of everything we do and not just a gate in a process 

  • Leading product roadmaps, planning and establishing best practices

  • Developing expertise in the financial services industry and regulatory environments

  • Building and maintaining exceptional client relationships through team excellence

  • Zero-to-one function building — creating product delivery frameworks, engineering performance systems, and product delivery processes from the ground up

We build our platform with technology like:

  • Kotlin & ecosystem — Coroutines, Arrow, Ktor, Kotlinx.Serialization, Exposed

  • Event-sourced microservices

  • Cloud deployments — GCP, Docker, Kubernetes, Concourse

  • High-performance data & messaging — Postgres & Kafka

  • Observability — Grafana, Jaeger & Prometheus

We are looking for skilled Kotlin engineers to help build FoundryOS. You'll be a key player in our team, building out new products and features of the platform.

Building high-performance, scalable, available, fault-tolerant systems is a team game, and so we want to know that you play well with others. Lone geniuses are brilliant — just not for us.

What you’ll be doing
  • Developing high quality, tested services

  • Collaborating in the design of new features

  • Being part of the discussion on strategic architectural improvements to the Platform

  • Cross-functional working with platform and front-end engineers

  • Proactively monitoring and support production deployments

Location

We describe ourselves as “remote but not remote only”. 

We believe work can be done anywhere but relationships and trust are built best face-to-face. And that the best teams take ownership for themselves. 

We strongly believe our people should decide where they will do the best work for the company.  We don’t support presenteeism, nor do we support missing important face-to-face meetings to receive an Amazon delivery at home.  But if you take ownership of yours and your teams’ deliveries, and will work where you need to be to get the best outcome for the company, whether that be at home, in the office in London, or meeting strategic partners, then you’re for us.

Benefits
  • 25 days holiday

  • Birthday day off

  • Workplace Pension Scheme 

  • Private Medical Insurance

  • Private Dental Insurance 

  • Group Income Protection

  • Group Life Assurance 

  • 24-hour mental health support 

  • Equity Scheme (coming soon!)

  • 2+ years experience with some or all of the technologies in our platform or equivalents

  • Strong experience in JVM-based languages (ideally Kotlin)

  • Background and/or enthusiasm for the ways we work:

    • Test Driven Development

    • Functional Programming

    • Build automation, continuous integration and continuous deployment to production systems

    • Agile/iterative development processes

    • Shared code ownership & cross-functional teams

    • Collaborative design and development

    • Pair programming

  • It would be a bonus if you have experience with:

    • Full-stack development

    • Financial Services



At FoundryOS we focus hard on getting the best talent into our team. We are committed to making our recruitment process transparent and simple.

We are committed to diversity and will always accommodate your needs during our hiring process.

We don't use AI or chatbots for interviewing; you will always be talking with a real person.

Step 1: Meet the recruiter

If you meet the grade we will have a short discussion with you to understand you more and get to know us and the role.

Step 2: First (technical) interview

The team you could be working with will interview you. Some roles have a technical part of the interview process.

Step 3: Second (final) interview

A second stage interview will go deeper about you and how you align with us as a company.

Step 4: Decision

We will make a decision and let you know why. We will never ghost you or give you generic feedback.

Key Skills

Ranked by relevance

continuous integration continuous deployment kubernetes grafana kotlin docker gcp jvm ai
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Posted
Mar 25, 2026
Type
Full-time
Level
Entry
Location
London
Company
FoundryOS

Industries

Financial Services

Categories

Information Technology

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