Senior Full Stack Software Engineer

Capital on Tap; Porto; Hybrid; EUR 55,000 - 70,000; Full time

Benefits offered by this job

Private healthcare through AdvanceCare

Anniversary rewards

Paid car parking

36 days holiday

Annual learning and wellbeing budget

Six free therapy sessions per year

Free drinks and snacks in offices

Job summary

Capital on Tap is seeking an experienced Software Engineer to develop robust solutions using .NET and React technologies. This hybrid role involves taking ownership of the software development lifecycle and collaborating with various teams to build high-quality applications.

The ideal candidate will have at least 5 years of experience with C#, SQL Server, and a strong proficiency in modern JavaScript frameworks. Benefits include private healthcare, generous annual leave, and professional growth opportunities.

Qualifications

• Minimum 5 years of hands-on experience in C#, .NET Core, SQL Server, ideally with JavaScript and React.
• Proficiency in testing practices, including unit and integration testing.
• Good understanding of database technologies.
• Experience with Agile development practices.

Responsibilities

• Build robust and scalable solutions using .NET technology.
• Own the SDLC from code to production and continuous improvement.
• Craft responsive UI with modern JavaScript frameworks (React).
• Partner with Product Managers, QA engineers, and fellow software engineers.
• Build unit and integration tests to ensure software quality.
• Troubleshoot and adjust the software as needed.

Skills

C#

.NET Core

SQL Server

JavaScript

React

Agile Development

Tools

Azure

GCP

MongoDB

Flutter

Job description

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, an 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, £20 bn 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 team works from our Matosinhos office two days per week.

Salary: €55,000‑70,000.

What You'll Be Doing

• Build robust and scalable solutions using .NET technology.
• Own the SDLC from the first line of code to production, monitoring, and continuous improvement.
• Craft slick, responsive user interfaces with modern JavaScript frameworks (React), ensuring products don't just work, they feel great to use.
• Partner with Product Managers, QA engineers, and fellow software engineers.
• Build bulletproof unit and integration tests to keep software sharp and users happy.
• When bugs happen, troubleshoot and tweak as needed.
• Bridge the gap between technical speak and business goals, ensuring everyone is on the same page and moving forward together.

We're Looking For

• Minimum 5 years of hands‑on experience in C#, .NET Core, SQL Server – ideally with JavaScript and React.
• Proficiency in testing practices, including unit and integration testing.
• Good understanding of database technologies.
• Experience with Agile development practices.
• Passion for learning new skills and technologies.
• 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

Diversity & Inclusion

We welcome, consider, and encourage applications from anyone who shares our commitment to inclusivity.

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 (public holidays carried over if they fall on a weekend).
• Annual learning and wellbeing budget.
• Six free therapy sessions per year.
• Free drinks and snacks in our offices.

Apply

If you'd like to progress your career within our fast‑growing, profitable fintech, click apply and we aim to get back to you within 3 working days (during busy periods this could take up to 5 working days).