Job Specifications
Job Title: AI Core Senior Software Developer
Location: Cambridge - 3 days a week on-site
Salary/Rate: PS600-PS630/day inside IR35.
Start Date: October 2025
Job Type: Contract
We are looking for passionate and skilled Software Developers to join our Core AI Services team. In this role, you will help design, develop, and scale AI-enabling platform services and public APIs that are secure, reliable, and cloud-native. These services will act as foundational building blocks for AI adoption across our client's portfolio and partner ecosystem.
You will be part of a Scrum team to build innovative, standards-compliant, secure, and production-grade AI capabilities, with a builder mindset - rapid prototyping and continuous improvement with the agility of a start-up.
Key Responsibilities:
Build scalable, fault-tolerant cloud-native services on Microsoft Azure, ensuring high performance and reliability. 3
Develop secure, well-documented public APIs and SDKs for consumption by internal and external developers. 2
Collaborate with cross-functional teams to deliver end-to-end solutions across data pipelines, orchestration, and service APIs. 3
Embed robust security controls to protect sensitive data and ensure secure access to AI services. 3
Contribute to design reviews, code reviews, and architectural discussions to ensure engineering excellence. 3
Mentor junior developers, encourage continuous learning, and contribute to a culture of innovation. 3
Work with multiple teams to create AI solutions, which include AI model deployment, training, and AI tooling development. 2
AI & Cloud Expertise
Experience working with Large Language Models (LLMs) and understanding of trade-offs between performance, cost, and capability.
Understanding of Retrieval-Augmented Generation (RAG), agent orchestration, prompt engineering, and tool calling.
Familiarity with AI standards such as Model Context Protocol (MCP) and Agent2Agent (A2A).
Strong knowledge or experience in working with various ML algorithms (regression, classification, clustering, deep learning)
Knowledge of AI ethics and regulations (eg, NIST AI RMF, EU AI Act), and commitment to responsible AI development.
Fluent in developing code using AI Tools such as GitHub Copilot. Must be able to use prompt engineering to carry out multiple development tasks.
Familiar with AI orchestration, including tools like AI Foundry and/or Semantic Kernel.
Experience with tools for automated testing and evaluation of AI outputs is a plus.
Experience in Python and AI frameworks/ools such as PyTorch and TensorFlow.
Core Skills and Qualifications:
Experience in software engineering, preferably in platform or cloud-native service development using Microsoft and .NET technologies.
Hands-on experience with Microsoft Azure and associated PaaS services (eg, Azure Functions, AKS, API Management).
Strong expertise in RESTful API design, versioning, testing, and life cycle management.
Proficient in securing APIs, managing authentication/authorization and data privacy practices.
Excellent problem-solving skills, with the ability to analyse complex technical challenges and propose scalable solutions.
Experience working in Agile teams and collaborating across global R&D locations
Demonstrated ability to mentor junior team members fostering a culture of continuous learning and innovation
Demonstrated experience with AI frameworks, tools and Python
About the Company
With over 25 years in the technology recruitment sector, Square One is an award-winning specialist recruitment agency. Based in London, we manage recruitment on an international scale with clients ranging from start-ups to global corporations. Our goal is to offer a comprehensive recruitment service for our clients, building long-term relationships with them to ensure candidates receive the best career opportunities possible.
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