Senior AI Engineer

Our Company
At Quantum we connect global brands with high-intent consumers. We turn intent into action and complexity into clarity.

Our Mission is clear to help smarter faster buying decisions. Our vision to be the worlds most used digital comparison service delivering value and simplicity to millions.

We drive growth through data-driven affiliate marketing built for performance from day one. Every campaign is measurable optimised in real time and designed to scale.

With in-house tech full-stack analytics and a compliance-first mindset we give our partners an edge. We drive confident decisions and growth in regulated and high-growth sectors. Weve helped ambitious brands grow faster smarter and globally.

The Role
Were looking for an experienced Senior AI Engineer to join our team.

Youll be at the forefront of designing developing and deploying AI systems that power personalised advertising customer journey analytics audience segmentation and real-time bidding strategies.

Working closely with BI data engineers and product teams youll help build scalable AI solutions that deliver measurable business outcomes for some of the worlds most recognised brands. Our infrastructure is powered by Google Cloud Platform (GCP) and we take pride in applying cutting-edge AI techniques to real-world marketing and advertising challenges.

Key Responsibilities

• Architecture & Multi-Agent Design: Design build and deploy scalable multi-agent systems and generative AI features for Mar Tech challenges including ad targeting user segmentation and content personalisation.

• Advanced Agentic Workflows: Research and implement agentic design patterns such as planning reflection and tool usage using orchestration frameworks like LangGraph AutoGen or CrewAI.

• Cross-Functional Collaboration: Work closely across the organisation to translate ambiguous business objectives into discrete agent personas tool definitions and behavioural boundaries.

• Performance & Guardrails: Monitor and optimise multi-agent systems in production tracking agent-specific metrics including token efficiency execution loops and tool-calling accuracy to ensure system reliability.

• Security & Compliance: Maintain high standards for data security model explainability and mitigation of agent-specific risks such as prompt injection and unintended tool execution in compliance with GDPR and CCPA.

• Mentorship & Best Practices: Support and develop junior engineers and help champion best practices in agent-oriented programming prompt engineering model evaluation and scalable cloud infrastructure.

About You

• Experienced in software engineering ideally in Ad Tech Mar Tech or similarly complex and high-scale environments

• Experience building multi-agent or single-agent architecture with integrations to APIs and/or MCPs

• A good understanding of supervised unsupervised and reinforcement learning methods alongside experience working with foundation models and prompt engineering

• Practical experience with GCP services or AWS equivalent such as Vertex AI BigQuery ML Dataflow AI Platform Pipelines and Dataproc

• Practical experience with CI/CD for AI/ML model versioning monitoring and AI Ops practices

• An understanding of marketing and advertising concepts such as customer lifetime value attribution modelling real-time bidding and audience targeting is a plus

• Familiarity with data pipeline orchestration tools such as Apache Airflow and Kubernetes is a plus

• You do your best work as part of a team and enjoy sharing knowledge just as much as gaining it

• Confident navigating ambiguity and a fast moving environment

• Excellent written and verbal communication skills

• Collaborative and grounded you value the perspectives of others and create space for everyone to contribute

What Youll Get

• Private Health Care (Bupa)

• Hybrid Working (3 days in office)

• Travel Insurance

• Competitive Base Salary

• Company Bonus Scheme

• Paid for AI Subscription (Claude / ChatGPT / Gemini)

• Market-Leading Training Programme

• Recognition & Reward Scheme

• Annual Company Conference

• Regular Happy Hours & Team Lunches

• Free Coffee Drinks & Snacks

Whats the next step

Our hiring process ensures were recruiting the right people for the role. We ensure that people are as suitable for us as we are for them.

If you like the sound of what were all about at Quantum and want to join a team where you can make an impact please apply or contact us at

Required Experience:

Senior IC