Jobs Companies Capital on Tap Senior Software Engineer

About this Senior Software Engineer role at Capital on Tap

Capital on Tap · Onsite · Lisbon

We’re Capital on Tap 👋
💳 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 £1 billion in funds within its first year, and a growing suite of tools and financial products that make running a small business easier. 

1,000+ employees, £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! 

We opened our first Portuguese office in Porto in autumn 2025, and in less than a year it has grown to a team of 50. Lisbon is the next step. We're opening our first office in the city and looking for engineers to join as founding members of the team, helping shape how we build, hire and work here from day one.

🏡🏢 The role starts out fully remote. Once our Lisbon office is open, it will move to a hybrid set-up of two days a week on site.

Salary: €55,000-70,000

This is a multiple-headcount role, so please don't be put off if you've seen it advertised for a while.

 

What You’ll Be Doing
We’re looking for Senior Full stack Engineers to help us build the best credit card and payment products for small businesses. If you’re looking for an environment where you’re given the freedom to make empowered decisions, research new technologies, and learn/share knowledge with your peers. Then keep on reading!

  • 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
  • You’ll craft slick, responsive user interfaces with modern JavaScript frameworks (React), making sure our products don’t just work, they feel great to use
  • 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

We’re Looking For 🔎
Required skills:

  • A minimum of 5+ years hands-on experience in C#, .Net Core, SQL Server, ideally JavaScript and React also!
  • 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

Our Tech Stack

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

Interview Process 🤝

  • First stage: 30-minute intro, CV review, and values with a Talent Partner
  • Second stage: 45-minute “Tech Chat” with a Team Manager
  • Final stage: 90-minute Code Pairing + 30-minute Values Interview

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.

 

Great Work Deserves Great Perks

Check out our benefits:

🏥 Private Healthcare through AdvanceCare
🎁 Anniversary Rewards (€280, €570, €860, 4-week fully paid sabbatical)

🏖️ 36 days holiday (inclusive of public holidays with public holidays carried over if they fall on a weekend)
📖 Annual Learning and Wellbeing Budget
💬 6 free therapy sessions per year
🍫 Free drinks and snacks in our offices

 

Other Info
👍Check out our ‘Top Tips’ for interviewing.
✔️Keep updated on new job opportunities by following us on Linkedin.
📧Email [email protected] 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 $72,600/yrbelow the typical range for Software Engineer roles.

$71,896 median $90,170 $115,935

Typical range $74,973–$92,486/yr, from 16 comparable Software Engineer listings on JobsRadar (pay annualized to USD). See Software Engineer salary insights →

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.

 

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. 

 

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!

 

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 on our blog, and more about our team and our values here.

 

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

 

Alternatively, feel free to drop us an email at [email protected]. We'll be happy to hear from you.

See all jobs at Capital on Tap →

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