AI Engineer

SII Group UK; West of England; On-site; GBP 60,000 - 90,000; Full time

Job summary

SII UK is seeking an AI Engineer for Autonomy to design, develop and deliver advanced AI/ML solutions for safety-critical defence programmes. Working in a multidisciplinary AI and software engineering team, you will transform complex challenges into robust, scalable capabilities.

You will contribute across the full AI lifecycle from concept through deployment, with emphasis on responsible AI, model security and collaboration with data engineers, cyber security specialists and software engineers.

Qualifications

• Strong Python development experience in commercial or industrial settings.
• Experience building AI/ML solutions using PyTorch, TensorFlow or Scikit-Learn.
• Knowledge of autonomy frameworks such as ROS2 and related technologies.
• Experience with Computer Vision, NLP/LLM or Time-Series analytics.
• Solid data manipulation skills with Pandas, NumPy and SQL.
• Experience deploying AI models into production environments.
• Understanding of Responsible AI, explainability and AI security.

Responsibilities

• Translate business and operational requirements into AI design and measurable outcomes.
• Develop, train and evaluate AI/ML models across CV, autonomy, NLP/LLM and analytics.
• Design and maintain data processing, training and evaluation pipelines.
• Apply Responsible AI principles, ensuring model robustness, explainability and security.
• Collaborate with software engineers to deploy AI into production environments.
• Define and monitor model performance metrics and data quality indicators.
• Produce secure, maintainable code and documentation for architecture and guidance.
• Develop reusable AI components and frameworks to accelerate delivery.
• Support customer demos, PoCs and bid activities.

Skills

Python

PyTorch

ROS2

Computer Vision

NLP/LLM

Pandas

NumPy

SQL

Git

CI/CD

Agile

DevOps/MLOps

Security

SC clearance

Education

Degree in AI / Software Engineering / Data Science

Master's preferred

Tools

PyTorch

TensorFlow

Scikit-Learn

ONNX

Job description

We are seeking an AI Engineer for Autonomy to design, develop and deliver advanced Artificial Intelligence and Machine Learning solutions within complex and safety-critical environments. Working within a multidisciplinary AI and software engineering team, you will transform business and operational challenges into robust, scalable and secure AI capabilities.

This role offers the opportunity to contribute across the full AI lifecycle, from concept development and model design through to deployment and continuous improvement, while supporting innovation across high‑profile defence and technology programmes.

Key Responsibilities

• Translate business and operational requirements into AI solution designs and measurable outcomes.
• Develop, train and evaluate AI and Machine Learning models across areas such as computer vision, autonomy, large language models and predictive analytics.
• Design and maintain robust data processing, training and evaluation pipelines.
• Apply Responsible AI principles, ensuring model robustness, explainability, security and compliance.
• Work closely with software engineers to deploy AI capabilities into production environments.
• Define and monitor model performance metrics, data quality indicators and model drift measures.
• Produce high‑quality, secure and maintainable code following software engineering best practices.
• Generate technical documentation including architecture designs, model reports and implementation guidance.
• Develop reusable AI components and frameworks to accelerate future programme delivery.
• Support customer demonstrations, proof‑of‑concepts, technical workshops and bid activities.
• Collaborate with data engineers, architects and cyber security specialists to develop integrated

solutions.

• Evaluate emerging AI technologies and promote continuous improvement and innovation.

Essential Skills & Experience

• Strong Python development experience within commercial or industrial environments.
• Experience developing AI and Machine Learning solutions using frameworks such as PyTorch,

TensorFlow or Scikit-Learn.

• Knowledge of autonomy frameworks such as ROS2 or equivalent technologies.
• Experience working with Computer Vision, Deep Learning, NLP/LLM or Time‑Series Analytics solutions.
• Strong understanding of data analysis and manipulation using tools such as Pandas, NumPy and SQL.
• Experience deploying AI models into operational environments.
• Understanding of Responsible AI principles, model explainability and AI security considerations.
• Experience using Git and modern software development practices including testing and continuous integration.
• Knowledge of Agile development methodologies and DevOps/MLOps principles.
• Strong stakeholder engagement and communication skills with both technical and non‑technical audiences.
• Degree, Master's qualification or equivalent experience in Artificial Intelligence, Software Engineering, Data Science or a related discipline.
• Eligible to obtain UK Security Clearance (SC).

Desirable Skills

• Experience with MLflow, Weights & Biases or similar experiment‑tracking tools.
• Experience with Spark or large‑scale data processing platforms.
• Knowledge of ONNX, TorchScript, FastAPI or gRPC.
• Experience deploying AI solutions within Azure, AWS or Google Cloud environments.
• Experience using Docker and containerised deployment approaches.
• Experience developing software in C++ within safety‑critical environments.
• Experience defining solution architectures or technical governance.
• Familiarity with large‑scale data management and data‑labelling strategies.
• MLOps experience supporting production AI deployments.
• Contributions to open‑source projects, technical publications or patents.
• Relevant AI, cloud or Agile certifications.

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.

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.