Jobs β€Ί Companies β€Ί Capital on Tap β€Ί Senior Software Engineer (AI)

About this Senior Software Engineer (AI) role at Capital on Tap

Capital on Tap Β· Hybrid Β· London

We’re Capital on Tap πŸ‘‹
πŸ’³ Capital on Tap started because small businesses were underserved. Big banks were slow, their products weren't fit for purpose, and small business owners often couldn't access what they needed. We set out to fix that.

Today we're a financial platform - not just a credit card company. We offer a best-in-class business credit card, SME-focused spend management platform, a savings product that hit Β£1 billion in funds within its first year, and a growing suite of tools and financial products that make running a small business easier.Β 

1,000+ employees, Β£20bn in annual card spend, 200,000+ customers, 17,000+ Trustpilot reviews averaging 4.7 stars, and we're profitable. We’ve done a pretty good job so far, but we’re just getting started!Β 

πŸ“ˆCheck out the development opportunities in the Software Engineering team

🏒This is a Hybrid role, the Software Engineering Team works from our London (Moorgate) Office 2 days per week

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AI Engineering at Capital on Tap

We're building a small team of ~3 AI-specialist software engineers who embed directly within product teams to deliver intelligent features. Rather than operating as a separate unit, you'll work alongside existing teams as an internal consultant, helping them deliver AI-powered capabilities whilst building their skills through hands-on collaboration and structured training. Part of the role has a hand in upskilling the wider Engineering department through workshops, documentation, and knowledge transfer.

What You’ll Be Doing
You'll partner with product teams to build and deliver AI features, working embedded within their squad structure. Your role is to enable teams to successfully deliver AI capabilities while upskilling them to own the features long-term.

  • You’ll build robust and scalable solutions using .Net technology
  • From the first line of code to production, monitoring, and continuous improvement - you’ll own the SDLC
  • Teamwork makes the dream work - you’ll partner with Product Managers, QA’s, and fellow Software Engineers
  • You’ll build bulletproof unit and integration tests to keep our software sharp and our users happy
  • Bugs happen. When they do, you’ll be ready to troubleshoot and tweak as needed
  • You’ll bridge the gap between tech speak and business goals, ensuring everyone’s on the same page and moving forward together

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We’re Looking For πŸ”Ž
Required skills:

  • 4+ years hands-on experience in C#, .NET Core
  • Good testing practices, in both Unit and Integration testing
  • Good understanding of database technologies
  • Experience in using Agile development practices
  • A passion for learning new skills and technologies
  • A proactive, supportive, and collaborative team player


Nice to have:

  • Experience sharing knowledge through training sessions or workshops, helping other teams get the most out of tools or systems you've built.
  • Practical experience building backend applications or service wrappers that integrate with AI APIs or LLMs

Interview Process 🀝

  1. First stage: 30-minute intro, CV review, and values with Talent Partner
  2. Second stage: 45-minute β€œTech Chat” with our Engineering Manager
  3. Final stage: 90-minute Code Pairing + 30-minute Values Interview

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Diversity & Inclusion🌈
We welcome, consider and encourage applications from anyone who shares our commitment to inclusivity. Join us in creating a space where authenticity thrives, and everyone can do their best work.

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Other Info
πŸ‘Check out ourΒ β€˜Top Tips’ for interviewing.
βœ”οΈKeep updated on new job opportunities by following us on Linkedin.
πŸ“§Email careers@capitalontap.com if you have any questions.

Excited to work here? Apply!
If you’d like to progress your career within our fast growing, profitable fintech then click apply and we will aim to get back to you within 3 working days (during busy periods this could take up to 5 working days.)

Ready to apply to Capital on Tap?
Apply to Capital on Tap

How this Software Engineer salary compares

This role pays $55,036/yr β€” below the typical range for Software Engineer roles.

$65,444 median $175,207 $318,750

Typical range $111,925–$242,914/yr, from 112 comparable Software Engineer listings on JobsRadar (pay annualized to USD). See Software Engineer salary insights β†’

About Capital on Tap

At Capital on Tap, we believe in small businesses and their potential. That's why we are on a mission to build tools for small businesses to help them thrive.

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We have helped more than 200,000 small businesses across the UK and the US, and hope to partner with more than 1 million businesses by the end of 2025. We have been named by the Financial Times as one of the Fastest Growing Companies in Europe for 5 years in a row and we have a global team of 500 across London, Cardiff and Atlanta.Β 

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Our people (and our office dogs) really are the best thing about working at Capital on Tap. We have built a dynamic, fun and vibrant culture. Your opportunities for growth are as big as your ambitions and we champion you to pilot your own ideas to have an impact and add value to the business!

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We are a place where a diverse mix of talented people want to come and do their best work and most importantly feel included and welcome. We foster an environment that allows people to share, engage, learn, support, participate and work towards positive change. We hold regular culture and inclusion events, such as Black History Month, Pride Week and International Women’s Day and have genuine goals to improve every day. You can read more about these events onΒ our blog, and more about our team and our values here.

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Please take a look at our exciting opportunities and apply through our website.

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Alternatively, feel free to drop us an email atΒ careers@capitalontap.com. We'll be happy to hear from you.

See all jobs at Capital on Tap β†’

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