Gemologists and Junior AI Engineers.

Role Overview

• You will work for a fast-growing AI company in London, writing C# .NET code that integrates language models into real-world software products.

Key Responsibilities

• Build and maintain backend services and APIs in C# (.NET) that expose AI model functionality to applications and end users.
• Integrate pre-trained LLMs into.NET applications via REST APIs and SDKs — including Anthropic's Claude API — working under the guidance of senior engineers.
• Use Claude Code as an AI-powered coding assistant in your daily workflow, accelerating development, generating boilerplate, and getting unstuck faster.
• Write C# code to call, orchestrate, and manage AI model endpoints — including handling prompts, responses, retries, and error states.
• Implement prompt engineering logic in C# — structuring inputs and parsing outputs to ensure responses are accurate, reliable, and safe.
• Write unit and integration tests in C# to ensure AI-powered features behave correctly and reliably in production, using Claude Code to help generate and review test cases.
• Help debug unexpected model behavior such as hallucinations and biases, using Claude Code alongside logging and monitoring tools within the.NET application stack.
• Use Git every day for version control and get introduced to CI/CD pipelines — using Claude Code to help write, review, and improve your commits from day one.
• Work with .NET libraries and Azure AI/OpenAI SDKs — and Anthropic's Claude SDK — to bring language model capabilities into scalable, maintainable software.
• Collaborate with data engineers, NLP researchers, and product owners — contributing to code reviews and using Claude Code to level up your contributions from the start.
• Document your code, integrations, and experiments clearly, with Claude Code helping you write and maintain technical documentation as you go.
• Learn ethical AI and software engineering best practices — building systems in C# and.NET that are robust, fair, and safe for real users.