AI Engineer in London

Work with Us. Change the World. At AECOM, we're delivering a better world. Whether improving your commute, keeping the lights on, providing access to clean water, or transforming skylines, our work helps people and communities thrive. We are the world's trusted infrastructure consulting firm, partnering with clients to solve the world’s most complex challenges and build legacies for future generations.

In AECOM’s AI Engineering team your code will directly shape the physical world around us. We build AI-driven technology that revolutionises how infrastructure and buildings are designed and engineered; reducing waste, cutting CO₂, and making the built environment more efficient and sustainable. This is where software has measurable, real-world impact.

What You’ll Do:

• As part of the Assurance & Insight team, you will focus on designing, implementing and deploying LLM based solutions into production.
• Using various LLM models with latest approaches (agentic, context engineering) to solve challenging problems.
• Work end-to-end on ML solutions: from data preparation and evaluation, deployment, and monitoring.
• Develop text representation and semantic extraction pipelines for structured knowledge from unstructured data.
• Collaborate with product teams and domain experts to integrate LLM features into our SaaS platform.

Must-Have Qualifications:

• Master’s degree in Computer Science, Data Science, Computational Linguistics, or related field.
• Hands-on experience with LLM techniques for text representation and semantic data extraction.
• Knowledge on best practices and Evaluation techniques.
• Proven experience working end-to-end on Software solutions and CI/CD Pipelines.
• Proficiency in Python and pydantic validation.
• Experience building RAG systems, Prompt engineering, Data processing.

Preferred Skills:

• Understanding of optimizing both CPU-bound and GPU-bound workloads.
• Knowledge of monitoring and observability tools (e.g. Prometheus, Grafana, Elastic stack).
• Experience with Infrastructure as Code (Terraform).
• Experience with Azure.
• Experience with Machine Learning.
• Experience in building product for the construction industry.

Our Hiring Process:

• 25-minute screening call.
• Take-home challenge: A hands-on task to assess your problem-solving and technical skills.
• Combined technical and cultural interview (in-person).
• Whiteboard Interview: 1-hour with 2 of our engineers to discuss your solution to the take-home challenge (60 min).
• Culture fit: In-person meeting with our leadership team (30 min).

Why Join Us?

• Work on real-world problems where AI creates measurable impact.
• Be part of a team where your work matters, and your ideas become real.
• Collaborate with sharp, driven colleagues in a culture of trust, ownership, and high standards.
• Contribute to making the built environment smarter and more sustainable.

AECOM is proud to offer comprehensive benefits to meet the diverse needs of our employees. Depending on your employment status, AECOM benefits may include medical, dental, vision, life, AD&D, disability benefits, paid time off, leaves of absences, voluntary benefits, perks, flexible work options, well-being resources, employee assistance program, business travel insurance, service recognition awards, retirement savings plan, and employee stock purchase plan.

AECOM is a Disability Confident Employer and will offer an interview to applicants who have a disability or long-term condition, who meet the minimum/essential criteria for the role.