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Haystack Linkedin · Posted 2mo ago

Applied AI Engineer

London, Westminster, United Kingdom

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Senior Applied AI Engineer | £75,000 - £85,000

We're working with a scaling enterprise SaaS platform on this exciting opportunity. This isn't a research role; it’s a high-impact engineering position for someone who wants to ship production-grade AI features using C# and .NET Core.

You will leverage commercial LLMs like Anthropic Claude, OpenAI, and AWS Bedrock to build scalable, observable AI integrations that solve real user problems. If you are an engineer who thrives on high-quality AI-assisted development and clean RESTful API design, this is your next career move.

The Role

  • Design and deliver production AI features within a modern C# / .NET ecosystem and AWS cloud environment.
  • Integrate commercial AI APIs (Anthropic, OpenAI, Bedrock) with a focus on reliability, cost control, and structured outputs.
  • Set the standard for AI adoption, leading the team in AI-assisted development using tools like Cursor and Claude Code.
  • Build resilient systems with deep observability, using SQL (MariaDB/MySQL) and RESTful API versioning.
  • Collaborate via the Shape Up methodology to move from concept to user-facing AI capability rapidly.

What You'll Need

  • 7+ years of professional software engineering experience with at least 5 years focused on C# and .NET Core.
  • Proven track record of shipping AI-powered integrations into live production environments (not just prototypes).
  • Deep expertise in prompt design, tool use, and function calling with paid LLM providers.
  • Strong architectural skills in microservices, distributed systems, and secure-by-design principles (ISO 27001).
  • A passion for AI-assisted workflows and the ability to mentor other engineers on modern AI development tooling.

What's On Offer

  • Competitive salary of £75,000 - £85,000 with a dedicated training and development budget.
  • Hybrid working model (2 days per week in the Warrington office) offering a great work-life balance.
  • The chance to influence AI strategy across a growing organization where AI is treated as a core engineering discipline.
  • Clear career progression pathways into leadership or specialized technical roles.

Apply via Haystack today!

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