Senior Full-Stack Developer (.Net)

This is who we are:

A market leader in personal loans with a multi-cultural customer and employee base, we are Instant Finance. For over 54 years, we’ve supported our customers with responsible lending and ethical practices. Our success is built on doing what’s right, putting customers first, backing our people, building strong relationships, and living our values of integrity, teamwork, and genuine care.

We are on the lookout for a hands-on Full Stack .NET Developer to join our IT team and help drive ongoing enhancements across our core systems.

This is a practical, delivery-focused role with a strong front-end component, working across modern web technologies while also maintaining and improving our Microsoft-based platforms.

You’ll be working closely with the wider IT team and business stakeholders to deliver reliable, high-quality solutions that support real business outcomes.

About You:

• 8+ years’ commercial software development experience
• Strong experience with Microsoft technologies (.NET, C#, Azure, SQL Server)
• Front‑end experience with Vue.js, Angular.js, and/or Umbraco integration
• Exposure to ASP.NET, Blazor, and modern web frameworks
• Experience with automated testing and Agile delivery
• Strong problem‑solving and analytical skills
• Ability to work semi‑autonomously and manage delivery from design through to deployment
• Exposure to fintech or regulated environments is preferred

On a daily basis you will:

• Design, develop, and enhance software using agreed SDLC processes
• Translate business and technical requirements into working solutions
• Deploy software using established change control and DevOps processes
• Provide ongoing support, defect resolution, and small change requests
• Write and maintain technical documentation, user guides, and training material
• Participate in QA, testing, and training activities
• Contribute to automated testing using the Playwright framework
• Support and improve CI/CD and automated build processes

Why Join Us?

• Stable, well-established Kiwi organisation
• Supportive, down-to-earth team culture
• Work on meaningful systems used nationwide
• Variety across front-end and back-end work

Plus:

• Bonus scheme
• Life insurance
• KiwiSaver matched up to 5%
• Staff discounts with major retailers

If you’re a Full Stack Developer who enjoys variety, collaboration, and working on systems that make a real difference, we would love to hear from you.

Apply now.

Applications close 16 Aug 2026, or earlier if the role is filled.