Full Stack Software Engineer

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📍 Porto

About this role

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! 

🏡🏢This is a hybrid role, our engineering teams work from our Matosinhos office Office 2 days per week.

Salary: €40,000-55,000

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 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 3+ 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)

🚘 Paid Car Parking

🏖️ 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 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.)

Frequently Asked Questions

Is the salary disclosed for the Full Stack Software Engineer position at capitalontap?
The salary for this Full Stack Software Engineer role at capitalontap is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the Full Stack Software Engineer position at capitalontap located?
This Full Stack Software Engineer role at capitalontap is based in Porto. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Which team or department does the Full Stack Software Engineer at capitalontap belong to?
This Full Stack Software Engineer position is part of the IT department at capitalontap. See the full job description for more information about the team structure and responsibilities.
How do I apply for the Full Stack Software Engineer position at capitalontap?
Click the "Apply Now" button on this page. You will be redirected to capitalontap's official application portal hosted on greenhouse where you can submit your application directly.
When was the Full Stack Software Engineer job at capitalontap posted?
This Full Stack Software Engineer position at capitalontap was posted on Jan 14, 2026. Apply as soon as possible — early applications are often reviewed first.
Full Stack Software Engineer
capitalontap
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