AI Software Engineer

Groupe Sii; United Kingdom; Remote; GBP 65,000 - 90,000; Full time

Job summary

SII UK is seeking an AI Software Engineer to develop AI-enabled software solutions using Python, Generative AI and LLMs in a modern engineering environment. You will build automation, integration, and scalable REST APIs, microservices and SDKs, collaborating with engineering teams and stakeholders across the UK.

The role emphasizes production-quality code, testing and performance optimisations. Five strategic offices across the UK support customer delivery.

Qualifications

• Strong commercial Python development experience.
• Experience with Generative AI, LLMs or AI-powered applications.
• Understanding of agentic AI and ideally MCP.
• Experience integrating AI models and cloud-based AI services.
• Strong experience with REST APIs, web services and microservices.
• Knowledge of Git, automated testing, clean coding and software design patterns.
• Understanding of data pipelines and data management.
• Experience developing production-quality software within an Agile environment.

Responsibilities

• Develop AI-powered applications and automation frameworks using Python.
• Build intelligent agents and workflows using LLMs, MCP and agent-based architectures.
• Integrate foundation models through cloud-based AI platforms.
• Develop prompt engineering, AI evaluation and guardrail frameworks.
• Build and maintain data processing and validation pipelines.
• Design scalable REST APIs, web services, microservices and SDKs.
• Develop clean, reusable and well-tested production-quality code.
• Troubleshoot and optimise software performance, reliability and automation.
• Collaborate with engineering teams and technical stakeholders throughout the software development lifecycle.

Skills

Python

Generative AI / LLMs

Agentic AI / MCP

AI model integration

REST APIs

Git

Automated testing

Clean code

Design patterns

Data pipelines

Agile

Job description

We are seeking an AI Software Engineer to develop AI-enabled software solutions using Python, Generative AI and Large Language Models (LLMs). The role will focus on building intelligent automation and validation frameworks, integrating AI models, and developing scalable software solutions within a modern engineering environment

Key Responsibilities

• Develop AI-powered applications and automation frameworks using Python.
• Build intelligent agents and workflows using LLMs, Model Context Protocol (MCP) and agent-based architectures.
• Integrate foundation models through cloud-based AI platforms.
• Develop prompt engineering, AI evaluation and guardrail frameworks.
• Build and maintain data processing and validation pipelines.
• Design scalable REST APIs, web services, microservices and SDKs.
• Develop clean, reusable and well-tested production-quality code.
• Troubleshoot and optimise software performance, reliability and automation.
• Collaborate with engineering teams and technical stakeholders throughout the software development lifecycle

With five strategic offices in Belfast, Chester, Farnborough, London and Oxford, we work in partnership with our customers UK-wide to deliver high-impact engineering solutions.

SII UK is a trusted Aerospace and Defence engineering partner, supporting the delivery of complex, mission-critical programmes while helping to shape the future of innovation across next-generation systems and technologies.

Our teams contribute daily to creating a fulfilling, stimulating and career development focused work environment.

True to our human-centred values, we are committed to making SII UK a Great Place To Work®, having been certified 5 years running.

Joining SII UK means being part of our collective goals, guided by our mission “Let’s Tech Together,” and helping to build a digital future that is sustainable, at the heart of an environment that values learning & collaboration.

Essential Skills & Experience

• Strong commercial Python development experience.
• Experience with Generative AI, LLMs or AI-powered applications.
• Understanding of agentic AI and ideally MCP.
• Experience integrating AI models and cloud-based AI services.
• Strong experience with REST APIs, web services and microservices.
• Knowledge of Git, automated testing, clean coding and software design patterns.
• Understanding of data pipelines and data management.
• Experience developing production-quality software within an Agile environment.

Who are we?

With five strategic offices in Belfast, Chester, Farnborough, London and Oxford, we work in partnership with our customers UK-wide to deliver high-impact engineering solutions.

SII UK is a trusted Aerospace and Defence engineering partner, supporting the delivery of complex, mission-critical programmes while helping to shape the future of innovation across next-generation systems and technologies.

Our teams contribute daily to creating a fulfilling, stimulating and career development focused work environment.

True to our human-centred values, we are committed to making SII UK a Great Place To Work®, having been certified 5 years running.

Joining SII UK means being part of our collective goals, guided by our mission “Let’s Tech Together,” and helping to build a digital future that is sustainable, at the heart of an environment that values learning & collaboration.