Senior Software Engineer

About the Company

Capital on Tap is a financial platform that offers a best‑in‑class business credit card, spend management platform, savings product, and other tools to help small businesses. The company has 1,000+ employees and handles £20bn in annual card spend.

We are looking for Senior Full‑Stack Engineers to build credit card and payment products for small businesses. This hybrid role is based in London, Moorgate office, and requires in‑office work two days a week.

• Build robust and scalable solutions using .Net technology.
• Own the software development life cycle from coding to production, monitoring and continuous improvement.
• Craft responsive user interfaces with modern JavaScript frameworks such as React.
• Collaborate with product managers, QA and fellow engineers.
• Write unit and integration tests to keep the software reliable.
• Troubleshoot and resolve bugs.
• Bridge technical and business teams to align goals.

• Minimum 5 years hands‑on experience in C#, .Net Core and SQL Server; experience in JavaScript and React is desirable.
• Proficiency in unit and integration testing.
• Strong grasp of database technologies.
• Experience with Agile development practices.
• Passion for learning new technologies.
• Proactive, supportive, and collaborative team player.

• Backend: C#, .Net, .Net Core
• Frontend:
  React, Java Script
• Mobile:
  Flutter, Dart
• Databases: SQL Server, MongoDB
• Cloud:
  Azure, GCP

We welcome, consider and encourage applications from anyone who shares our commitment to inclusivity. We strive to create a space where authenticity thrives and everyone can do their best work.

• Private health care, dental and optician services through Vitality.
• Worldwide travel insurance through Vitality.
• Annual learning and wellbeing budget.
• Enhanced parental leave.
• Cycle to work scheme.
• Season ticket loan.
• Free therapy sessions per year.
• Dog‑friendly offices.
• Free drinks and snacks in offices.
• Salary sacrifice pension scheme up to 7% match.
• Octopus EV salary sacrifice scheme.
• 28 days holiday plus bank holidays.
• Anniversary rewards (£250, £500, £750, 4‑week fully paid sabbatical).

To apply, click the link and we will aim to get back to you within 3 working days (up to 5 during busy periods). If you have any questions, email