Senior Software Engineer

Capital on Tap; Greater London; Hybrid; GBP 60,000 - 80,000; Full time

Benefits offered by this job

Private health care

Annual learning and wellbeing budget

28 days holiday plus bank holidays

Dog-friendly offices

Free drinks and snacks

Job summary

Capital on Tap is looking for a Senior Full-Stack Engineer to build innovative credit card and payment products. This hybrid role requires in-office work at the London Moorgate office for two days a week.

Your mission will involve using .Net technology to create scalable solutions, collaborating with product teams, and crafting user interfaces using React. The ideal candidate will have at least 5 years of experience in C# and .Net Core, along with strong JavaScript skills.

Amazing benefits including private health care, wellbeing budget, and 28 days of holiday.

Qualifications

• Minimum 5 years hands-on experience in C#, .Net Core and SQL Server.
• Proficiency in unit and integration testing.
• Passion for learning new technologies.

Responsibilities

• Build robust and scalable solutions using .Net technology.
• Own the software development life cycle from coding to production.
• Craft responsive user interfaces with modern JavaScript frameworks.

Skills

C#

.Net Core

SQL Server

JavaScript

React

Agile development practices

Tools

Azure

GCP

MongoDB

Flutter

Dart

Job description

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.

Role Overview

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.

What You’ll Be Doing

• 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.

Required Skills

• 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.

Technical Stack

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

Diversity & Inclusion

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.

Benefits

• 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).

How to Apply

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 [e-mail].