Senior Fullstack Engineer Business Banking Payments

OakNorth

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profile Job Location:

London - UK

profile Monthly Salary: Not Disclosed
Posted on: 17-08-2025
Vacancies: 1 Vacancy

Job Summary

At OakNorth were on a mission to empower the UKs most ambitious businesses. Since 2015 weve lent over $18 billion across the UK and US helped create more than 58000 new homes and 36000 new jobs and supported hundreds of thousands of personal savers all while fuelling the UK economy.

Team Mission

The Business Banking Payments squads mission is to deliver a fast reliable and seamless payment experience that empowers our customers to move money effortlessly and securely. We own the full payments journey from transaction initiation in the mobile and web frontends to the processing in the backend including Fraud and AML checks and connecting to the payments schemes ensuring that businesses can focus on growth while we handle the complexity behind the scenes.

The role

    • Have a strong technical background including 5 years of experience designing and engineering large-scale systems
    • Measure your success in terms of business impact not lines of code
    • Internalise the best ideas from across the organisation humbly setting a vision that others can get behind
    • Embrace DevOps culture: You build it you run it
    • Work well cross-functionally and earn trust from co-workers at all levels
    • Care deeply about mentorship and growing your colleagues
    • Prefer simple solutions and designs over complex ones
    • Enjoy working with a diverse group of people with different areas of expertise.
    • You challenge the existing approach when you see the cliff edge racing towards us but also get on board once the options have been debated and the team has made a decision.
    • Youre a broad thinker and have the capability to see the potential impact of decisions across the wider business
    • Utilise GenerativeAI: Leverage GenAI tools to increase productivity and enhance decision-making processes within the role
    • It would be an added bonus if you have experience with/ knowledge of transaction monitoring financial crime prevention AML and fraud detection.
    • Nice to have - Familiarity with transaction systems statements and reconciliation processes

Technology

    • Were pragmatic about our technology choices. These are some of the things we use at the moment:
    • Python
    • PostgreSQL BigQuery MySQL
    • TypeScript React styled-components
    • Jest React Testing Library Cypress pytest
    • AWS GCP
    • ECS Fargate Docker Terraform GitHub Actions

How we expect you to work

    • We expect you to work in these ways as well as encouraging and enabling these practices from others:
    • Collaborate - We work in cross-functional mission driven autonomous squads that gel over time. We pair program to work better through shared experience and knowledge.
    • Focus on outcomes over outputs - Solving a problem for users that translates to business results is our goal. Measurements focused on that goal help us to understand if we are succeeding.
    • Practice continuous improvement - We optimise for feedback now rather than presume what might be needed in the future and introduce complexity before it will be used. This means we learn faster. We share learnings in blame-free formats so that we do not repeat things that have failed but still have confidence to innovate.
    • Seek to understand our users - We constantly seek understanding from data and conversations to better serve our users needs taking an active part in research to hear from them directly and regularly.
    • Embrace and enable continuous deployment - Seamless delivery of changes into an environment - without manual intervention - is essential for us to ensure that we are highly productive; consider resiliency; and practice security by design.
    • Test outside-in test first - TDD keeps us confident in moving fast and deploying regularly. We want to solve user problems and so we test with that mindset - writing scenarios first then considering our solution; coupling tests to behaviour rather than implementation.
    • You build it you run it - We embrace DevOps culture and end-to-end ownership of products and features. Every engineer regardless of their role has the opportunity to lead delivery of features from start to finish.
    • Be cloud native - We leverage automation and hosted services to deliver resilient secure services quickly and consistently. Where SaaS tools help us achieve more productivity and better quality results for a cheap price we use these to automate low value tasks.

How we expect you to behave

    • We embrace difference and know that when we can be ourselves at work we are happier more motivated and creative. We want to be able to bring our whole selves to work have our own perspectives and know that we belong. As such through your behaviours at work we expect you to reflect and actively sustain a healthy engineering environment that looks like this:
    • A wide range of voices heard to the benefit of all
    • Teams that are clearly happy engaged and laugh together
    • Perceivable safety to have an opinion or ask a question
    • No egos - people listen to and learn from others at all levels with strong opinions held loosely

What makes working here better

    • This is a truly hybrid role offering engineers the flexibility to work from home while also providing opportunities to collaborate in person with the team when it adds value. Theres no fixed requirement for days in the office instead we focus on creating space for engineers to engage meaningfully whether thats in-person for whiteboarding sessions or remote for deep focus work.
    • Work-life balance - 25 days holiday (plus bank holidays) each year and enhanced family leave allowances.
    • Competitive salary & equity - We want people to have a serious stake in the business.
    • Good kit - Your choice of the best laptop running macOS or Ubuntu.
    • Team socials - The opportunity to get to know each other outside of work.
    • Company socials - A chance to catch up and meet new colleagues weekly over informal office breakfasts and dinners on OakNorth - or at our free barista bar every day.
    • Commuter support - We offer the cycle to work & EV scheme.
We may use artificial intelligence (AI) tools to support parts of the hiring process such as reviewing applications analyzing resumes or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed please contact us.

Required Experience:

Senior IC

At OakNorth were on a mission to empower the UKs most ambitious businesses. Since 2015 weve lent over $18 billion across the UK and US helped create more than 58000 new homes and 36000 new jobs and supported hundreds of thousands of personal savers all while fuelling the UK economy.Team Mission The...
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Key Skills

  • Business Intelligence
  • Bidding
  • Accounting And Auditing
  • Account Development
  • Architectural Design
  • Content Development

About Company

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OakNorth Credit Intelligence Suite transforms commercial lending, giving banks 360° views of borrowers, with deeply granular, forward-looking insight, to improve efficiencies, lower credit risk, and drive profitable growth through economic cycles. Banks lend smarter, lend faster, and ... View more

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