Full Stack Developer - .NET

Arm; City Of London; Hybrid; GBP 86,000 - 113,000; Full time

Job summary

Arm in London is seeking a Full Stack Developer - .NET on a 6-month contract (Inside IR35) to join a hybrid, London-based team.

You will work on full-stack development using React, .NET, PostgreSQL and Azure, apply AI-assisted practices, perform testing, UAT support and documentation. This Insurance sector role focuses on delivering secure, scalable software with clear stakeholder demonstrations and thorough release readiness.

Responsibilities

• Full-stack development across React, .NET, PostgreSQL, Azure.
• Apply AI-assisted development practices to accelerate delivery.
• System testing and provide supporting test evidence.
• Cross-browser and cross-device testing for compatibility.
• Support UAT including defect resolution and queries.
• Deliver business and technical demonstrations to stakeholders.
• Apply feedback to enhance functionality and re-demonstrate changes.
• Support releases into lower environments and production.
• Create and maintain technical and functional documentation.
• Share knowledge with internal teams to support handover.

Skills

React

.NET

PostgreSQL

Azure

Job description

Full Stack Developer - .NET

6-Month contract - Inside IR35 - up to £540 per day

London based - hybrid working - 2-3 days a week onsite

Insurance sector - must have previous experience

Responsibilities:

• Full-stack development and build activities across the agreed technology stack (React, .NET, PostgreSQL, Azure)
• Application of AI-assisted development practices to accelerate delivery and improve code quality
• System testing, including the provision of supporting test evidence
• Cross-browser and cross-device testing to ensure compatibility and responsiveness
• Support for User Acceptance Testing (UAT), including defect resolution and query handling
• Delivery of business and technical demonstrations to stakeholders
• Implementation of business feedback, including iterative enhancement and re-demonstration of functionality
• Support for releases into lower environments and production
• Creation and maintenance of technical and functional documentation
• Knowledge sharing with internal teams to support ongoing capability and handover