Senior C# Developer (AI-Assisted Development)

DMR Personnel Ltd; Norwich; On-site; GBP 55,000 - 65,000; Full time

Benefits offered by this job

Workplace pension

On-site parking

Career progression

Job summary

DMR Personnel Ltd in Norwich seeks a Senior Developer to direct AI-generated outputs within a mission‑critical software environment. You will steer, orchestrate, and validate AI-written C# code to ensure enterprise-grade reliability while staying hands-on where needed.

This on-site role requires 4+ years of C# experience and 2+ years with AI coding tools, and offers a clear path for progression in a growing tech firm that values technical mastery and practical testing.

Qualifications

• 4+ years of professional C# development experience.
• 2+ years with AI coding tools or automated code-generation agents.
• Strong hand-coding skills with deep C# architecture knowledge.
• Methodical approach to unit/integration testing.
• Excellent communication and ability to challenge architecture ideas.

Responsibilities

• AI Orchestration & Review: Direct, monitor, and review the code outputs generated by AI agents.
• Integration & Architecture: Piece together AI-generated code blocks into cohesive, scalable software solutions.
• Advanced Debugging & Hand-Coding: Refactor, optimize, and fix complex logical errors when AI falls short.
• Rigorous Testing: Implement a methodical approach to testing and debugging live, high-stakes systems.
• Process Optimization: Improve AI prompt strategies, tooling, and codebase.
• Project Management (Upper Salary Band): Plan and manage delivery timelines with stakeholders.
• Commute: On-site daily at the Norwich North office.

Skills

C# development

AI tooling

Hand coding

Unit testing

Communication

Tools

LLMs

Job description

• Location: Norwich (North)
• 100% Fully On-Site
• 35 hour week, mon-fri
• Salary: £55,000 – £65,000 per annum (Dependent on Experience)
• Employment Type: Full-time, Permanent
• Sector: Technology

About the Company

My client is a highly successful, specialist software company whose products support their clients on a global basis. They develop mission‑critical software and work closely with major industry partners, and are able to offer a stable yet highly innovative environment.

The Role

Our client is pioneering the future of software engineering within their sector/field. In this role, AI agents write a significant portion of the primary C# codebase, and they require an experienced Senior Developer to direct, orchestrate, and validate this output.

You will not just be coding in a corner; you will act as the "human‑in‑the‑loop" engineer, ensuring AI‑generated components are woven into robust, enterprise‑grade systems where absolute reliability is critical.

Key Responsibilities

• AI Orchestration & Review: Direct, monitor, and review the code outputs generated by AI agents.
• Integration & Architecture: Piece together AI‑generated code blocks into cohesive, scalable, and robust software solutions.
• Advanced Debugging & Hand‑Coding: Step in with strong manual coding skills to refactor, optimize, and fix complex logical errors when the AI falls short.
• Rigorous Testing: Implement a methodical approach to testing and debugging live, high‑stakes logistics systems.
• Process Optimization: Continuously question current workflows and suggest improvements to the AI prompt strategies, tooling, and general codebase.
• Project Management (Upper Salary Band): Plan, prioritize, and manage project delivery timelines while managing stakeholders alongside your core development duties.
• Commute: Full commitment to working on‑site daily at the North Norwich office.

Essential Criteria

• Commercial Experience: Minimum 4+ years of professional C# development experience.
• AI Environment Experience: Minimum 2+ years of experience working actively with AI coding tools, LLMs, or automated code‑generation agents.
• Technical Mastery: Exceptional hand‑coding ability with a deep understanding of C# architecture, rather than a passive acceptance of generated outputs.
• QA Mindset: A highly methodical approach to system integration, debugging, and comprehensive unit/integration testing.
• Soft Skills: A confident, articulate communicator who is comfortable constructively challenging architectural ideas and proposing innovations.

What’s on Offer

• Competitive salary of £55,000 to £65,000 DOE.
• Workplace pension scheme.
• Dedicated on‑site parking.
• Clear career progression within a rapidly growing, specialist tech firm.
• The opportunity to work at the absolute forefront of AI‑assisted software development in a visible, high‑impact role.