Agentic AI Engineer (.NET) - Contract in England

Agentic AI Engineer (.NET) - Contract in England

England Freelance 125000 - 125000 £ / year (est.) Home office (partial)
Sanderson Recruitment

At a Glance

  • Tasks: Design and build AI agents that produce production-grade .NET code.
  • Company: Join a global tech leader in AI and software systems.
  • Benefits: Competitive salary, hybrid work model, and potential for contract extension.
  • Other info: Collaborative environment with opportunities for professional growth.
  • Why this job: Shape the future of AI while working with cutting-edge technologies.
  • Qualifications: Strong .NET and C# skills, with experience in AI agent development.

The predicted salary is between 125000 - 125000 £ per year.

Requirements

  • Proven track record building and shipping AI agents in production, including tool calling, orchestration, and multi‑step workflows.
  • Strong . NET and C# background, including . NET 8/9 and ASP. NET Core.
  • Hands‑on experience with a . NET‑native agent framework such as Microsoft Agent Framework or Semantic Kernel.
  • Experience building agents whose output is code, with a strong focus on validating and verifying correctness.
  • Familiarity with spec‑driven development, ideally Spec Kit.
  • Experience integrating tools via MCP (Model Context Protocol).
  • Experience designing human‑in‑the‑loop review and approval gates within agent workflows.
  • Ability to set technical direction and help upskill other engineers on agentic patterns and spec‑driven approaches.

Responsibilities

  • Design and build agents that produce production‑grade . NET code.
  • Implement a spec‑driven development workflow using Spec Kit.
  • Build review and approval gates so developers can verify and correct agent output before merge.
  • Integrate tools and data sources into agents via MCP (Model Context Protocol).
  • Set up evaluation, guardrails, and tests to catch incorrect output early.
  • Work alongside the engineering team and upskill them on agentic patterns and the spec‑driven approach.
  • Technologies
  • AI
  • ASP. NET
  • C#
  • Support
  • More

We are hiring for a 6‑month contract, inside IR35, with the intention to extend as part of a greenfield multi‑year programme.

The role is hybrid in Bristol, with 1‑2 days per week on site, and an ASAP start date.

We are supporting a global technology leader and software systems business that is building AI agents to generate production .

NET code under developer supervision.

This is a hands‑on engineering role with the opportunity to shape the technical direction, work with a diverse and inclusive team, and support a collaborative hiring process where we can provide adjustments if needed.

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Sanderson Recruitment

Contact Details:

Sanderson Recruitment Recruitment Team

StudySmarter Expert Advice🤫

We think this is how you could land Agentic AI Engineer (.NET) - Contract in England

Make Your Portfolio Shine

As a freelancer in software development, your portfolio is your bread and butter. Showcase not only your completed projects but also your coding skills on platforms like GitHub or GitLab. This visibility can lead to clients reaching out to you directly!

Join Developer Communities

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We think you need these skills to ace Agentic AI Engineer (.NET) - Contract in England

.NET
C#
.NET 8/9
ASP.NET Core
Microsoft Agent Framework
Semantic Kernel
Spec Kit

Some tips for your application 🫡

Showcase Your GitHub Projects:When applying for a freelance software engineering gig at Sanderson Recruitment, make sure to include your GitHub link in your application. Highlighting your code repositories, contributions to Open Source, and any personal projects can really set you apart and give us insight into your skills and coding style.

Tailor Your CV with Relevant Skills:In software development, the specifics matter! Make sure your CV lists the programming languages and technologies you excel at. Focus on the ones that align with the projects Sanderson Recruitment is working on. Listing your tech stack clearly will help us understand how you fit into our team.

Include a Portfolio of Your Work:A solid portfolio is a must when applying for freelance roles. Include links to any apps, websites, or software you've developed. Highlight any projects that reflect a strong user experience, efficiency, or innovative solutions—this is your chance to shine and show us what you can bring to the table!

Mention Your Availability and Rates:Since this is a freelance role, we want to know when you’re available and what your rates are like! Be upfront about your typical work hours and project timelines. This transparency will help us see if we can sync up for future projects at Sanderson Recruitment.

How to prepare for a job interview at Sanderson Recruitment

Showcase Your Code Wizardry

Since you're going for a freelance role in software engineering, have a solid portfolio ready to flaunt your best work. Include projects that highlight your coding skills, frameworks you excel in, and any problem-solving feats you've pulled off. This is your chance to shine, so choose pieces that reflect your unique style and expertise!

Prepare for Technical Challenges

Freelance gigs often involve tech assessments or coding challenges, so be ready to tackle some hands-on problems. Brush up on common algorithms, data structures, and any languages/frameworks relevant to the role at Sanderson Recruitment. Being comfortable with platforms like HackerRank or LeetCode can give you an edge and showcase your skills under pressure!

Be Clear About Your Rates and Flexibility

As a freelancer, be prepared to discuss your rates upfront. It's crucial to communicate your pricing structure clearly and whether you're open to negotiation. Do your homework on industry standards to ensure you pitch a fair and competitive rate that reflects your skills and experience!

Understand Their Tech Stack

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