AI Software Engineer - C#/.NET & LLMs in Production

Apache Associates; Newcastle upon Tyne; On-site; GBP 65,000 - 95,000; Full time

Job summary

Apache Associates is seeking an AI Software Engineer with strong C# .NET experience to turn AI concepts into production-ready features within our SaaS product portfolio. You will prototype quickly, ensure reliability, latency, and cost are balanced, and integrate LLM capabilities across product lines.

The role emphasizes prompt engineering, context design, and structured outputs, collaborating with product managers and engineers to deliver robust, customer-facing AI features.

Qualifications

• Strong commercial C# .NET development experience.

Responsibilities

• Design and build prompts, context strategies and LLM integrations for real-world product features.
• Develop primarily in C# .NET, integrating AI capabilities into established codebases.
• Build production-grade AI services with appropriate error handling, fallbacks, monitoring and logging.
• Prototype new ideas quickly and turn successful experiments into robust production features.
• Develop structured approaches to evaluating LLM outputs, using real business scenarios and measurable results.
• Work with LLM APIs across different providers and make pragmatic decisions around quality, cost and latency.
• Use AI coding tools such as GitHub Copilot, Cursor or equivalent as part of daily development.
• Ensure solutions fit established coding standards, architecture and deployment pipelines.
• Keep pace with the rapidly changing AI ecosystem and share approaches with colleagues.
• Understand the underlying business problem behind the technology being built.

Skills

C# .NET development

LLMs

Prompt engineering

Structured outputs

Production-grade software

LLM evaluation

AI tooling (Copilot/Cursor)

Tools

GitHub Copilot

Cursor

Job description

Apache Associates is seeking an AI Software Engineer with strong C# .NET experience to turn AI concepts into production-ready features within our SaaS product portfolio. You will prototype quickly, ensure reliability, latency, and cost are balanced, and integrate LLM capabilities across product lines.

The role emphasizes prompt engineering, context design, and structured outputs, collaborating with product managers and engineers to deliver robust, customer-facing AI features.