Senior Engineer

Role Overview

As a Senior Software Engineer on the Accounts & Card team, you will lead technical delivery and maintain high-performance standards for card-related products. You will partner with colleagues to drive technical ideation, solve complex problems, and make data-driven decisions.

Responsibilities

• You love to build new things but also don’t shy away from digging into a legacy codebase.
• You have an interest or experience in Functional Programming, microservices and/or event-driven architecture.
• You are a collaborator – you encourage pairing and believe that working together is smarter than working in a silo.
• You are a teacher – generous with your time and expertise to teach stakeholders and our fellow engineers how to answer their own questions.
• You proactively problem solve, identify and confidently mitigate any risks, issues or control weaknesses that arise in your day‑to‑day.

Qualifications

• Experience working with Python & Serverless.
• Strong fundamental programming skills (data structures, algorithms).
• Excellent communication skills, both written and spoken.
• An interest or experience in Functional Programming, Distributed Systems or Event‑Driven Architectures (using Apache Kafka).
• Knowledge of decision engines wanted but not essential.
• Able to architect custom AI solutions and smart automated systems that are safe, maintainable, and aligned with our long‑term mission.
• Act as a technical bridge and mentor, training builders across the company to move from basic AI usage to sophisticated system creation.

Location

London (Hybrid) – 2 days in the office.

Salary & Benefits

Competitive salary plus comprehensive benefits.

Benefits

• Flexibility: a benefit allowance you can tailor to your own life and family.
• Health: private medical and dental, health assessments, and access to a digital GP.
• Wealth: life assurance, share schemes, and financial coaching.
• Development: a dedicated annual learning allowance to help you level up.
• Lifestyle: electric car and cycle‑to‑work schemes, plus season ticket loans.
• Award‑winning parental leave policies covering fertility treatments to new additions to the family.

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