Senior .NET Developer

This is a rare opportunity to join one of New Zealand’s most significant core banking replacement programmes at a critical stage of delivery.
We’re looking for an experienced Senior .NET Developer with hands‑on banking product delivery experience, ideally within lending, to help modernise and integrate a next‑generation core banking platform. You’ll work hands‑on in a complex, high‑pace environment where strong engineering, domain knowledge, and pragmatic problem‑solving really matter.
Why this contract stands out

• Be part of a large-scale, multi‑year core banking transformation
• Join a high‑performing delivery team operating at pace
• Work on modern architecture, cloud platforms, and API‑driven services
• Opportunity to extend beyond initial 6 months based on programme demand
• Meaningful work modernising core lending products and banking capabilities

• Designing and building high‑quality .NET solutions supporting a modern core banking platform
• Developing APIs, backend services, and integrations, with a strong focus on lending products
• Collaborating across core, payments, channels, migration, and lending workstreams
• Championing modern engineering practices including CI/CD, DevOps, automation, and infrastructure‑as‑code
• Contributing to architectural decisions in a highly regulated banking environment
• Troubleshooting complex integration and data challenges across legacy and modern systems

• 7+ years’ experience as a .NET / C# developer in complex enterprise environments
• Proven experience delivering banking products, specifically lending (home loans, personal lending, credit, or similar)
• Strong experience with:
  • C# / .NET
  • API and integration design
  • SQL and data-heavy systems
  • Unit, integration, and non‑functional testing
  • CI/CD and DevOps practices
• Experience working on core banking platforms or core system replacements
• Exposure to AWS and highly available systems
• Comfortable operating in ambiguity and large transformation programmes

• Initial 6‑month contract
• Competitive hourly rate
• Wellington-based or hybrid options depending on programme needs
• Immediate or near‑term start preferred

Ready to make an impact?
If you’re a seasoned .NET contractor who enjoys working on complex banking transformations and wants to play a hands‑on role in rebuilding core lending platforms, this is an exceptional opportunity.
Apply now or get in touch for a confidential discussion.