Senior Fullstack Developer (Fintech)

TL;DR

Senior Fullstack Developer (Fintech): Building and optimizing robust credit card and payment products for small businesses with an accent on .NET backend services and responsive React interfaces. Focus on owning the full SDLC, ensuring system scalability, and delivering high-quality user experiences in a collaborative, agile environment.

Location: Must be based in or able to commute to London (Moorgate) for 2 days per week

Company

A profitable, fast-growing financial platform providing business credit cards and spend management tools to over 200,000 small businesses.

What you will do

• Build and maintain scalable backend solutions using .NET Core.
• Develop responsive, high-quality user interfaces with React.
• Own the full software development lifecycle from initial code to production and monitoring.
• Partner with product managers, QA engineers, and fellow developers to deliver features.
• Write comprehensive unit and integration tests to ensure system reliability.
• Troubleshoot and resolve production issues to maintain high service availability.

Requirements

• 5+ years of hands-on experience in C#, .NET Core, and SQL Server.
• Strong proficiency in JavaScript and React.
• Solid understanding of database technologies and testing practices.
• Experience working within Agile development teams.
• Proactive, collaborative mindset with a passion for continuous learning.
• Must be able to work from the London office 2 days per week.

Nice to have

• Experience with MongoDB.
• Familiarity with Azure or GCP cloud environments.
• Experience with Flutter or Dart.

Culture & Benefits

• Private healthcare including dental and opticians services.
• Salary sacrifice pension scheme with up to 7% employer match.
• 28 days of holiday plus bank holidays.
• Annual learning and wellbeing budget.
• Enhanced parental leave and sabbatical rewards.
• Dog-friendly office with amenities like a pool table and arcade machine.

Hiring process

• 30-minute introductory call with a Talent Partner.
• 45-minute technical chat with a Team Manager.
• 90-minute code pairing session followed by a 30-minute values interview.