Principal Software Engineer (.NET)

💼 Principal Software Engineer (.NET)

📍 Remote UK | 🌍 Global Fintech | 💳 Payments Innovation

Join a high-growth global fintech building the future of payments. We’re scaling fast and looking for a Principal Software Engineer to help shape our merchant-first ecosystem.

👀 What You’ll Do

• Architect and build scalable, modular backend services.
• Translate complex requirements into clean, testable code.
• Collaborate across empowered, cross-functional teams.
• Own the full development lifecycle — from design to deployment.
• Drive continuous improvement in engineering practices.

🧠 What You Bring

• 8–10 years in software engineering.
• Deep understanding of OOP and SOLID principles.
• Still working in a hands on development role
• Strong in C#, Java, Ruby, or Go.
• Skilled in SQL, joins, indexing, stored procedures, and ER modelling.
• Experience with CI/CD, BDD, and scalable system design.
• Passion for clean architecture and maintainable code.

🚫 Who Might Not Be a Fit

We have seen candidates struggle when they:

• Lack depth in OOP or SOLID principles.
• Rely on procedural or monolithic approaches.
• Have surface-level knowledge of frameworks without systems thinking.
• Struggle with relational database fundamentals.
• Lack experience in collaborative practices like code reviews and refactoring.

💡 Why this role?

• Small teams, big impact.
• Outcome-focused, no red tape.
• Merchant-first mindset.
• Culture of learning, experimentation, and technical excellence.

📬 Interested?

If you're a Principal-level engineer ready to take on meaningful challenges and want to be part of a company that genuinely values technical craft, let’s talk.

• Seniority Level
• Mid-Senior level
• Industry
• Software Development
• Employment Type
• Full-time
• Job Functions
• Information Technology
• Skills
• Relational Databases
• Systems Design
• Code Review
• C#
• .NET Framework
• Object-Oriented