--- title: 'Senior AI Engineer at Quantum' canonical: 'https://feeny.ai/job/senior-ai-engineer-quantum-london-g296er5w5fqb' type: 'job' last_seen: '2026-09-04' --- # Senior AI Engineer at Quantum - **Company:** Quantum - **Location:** London, United Kingdom - **Employment:** full-time - **Work type:** hybrid - **Posted:** 2026-09-01 - **Last confirmed live:** 2026-09-04 - **Apply:** https://jobs.ashbyhq.com/quantum/fe421a60-df4b-466f-a2e6-8ddbc01d444a ## Job description 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 world’s 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. We’ve helped ambitious brands grow faster, smarter, and globally. ## The Role We're looking for an experienced Senior AI Engineer to join our team. You'll 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, you'll help build scalable AI solutions that deliver measurable business outcomes for some of the world's 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 You’ll 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 What’s the next step? Our hiring process ensures we're 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 we're all about at Quantum and want to join a team where you can make an impact, please apply or contact us at careers@quantum.media. ## About Quantum ## Company Overview - **One-liner**: Quantum connects global brands with high-intent consumers through data-driven affiliate marketing, optimizing campaigns for performance and scalability. - **Entity Type**: Private (Bootstrapped) - **Headquarters**: London, England, United Kingdom - **Founded**: 2014 - **Founders**: Not publicly available ## Core Business - **Primary industry**: Affiliate marketing, digital performance marketing, comparison services - **Target customers**: B2B (global brands in regulated and high-growth sectors), B2C (high-intent consumers) - **Mission statement**: "To connect global brands with consumers, helping them make smarter and faster buying decisions." ## Products & Services - **Data-Driven Affiliate Marketing**: Full-service affiliate campaigns with in-house tech, real-time optimization, and compliance-first approach. - **Paid Advertising**: Targeted ads across search engines and social media to reach users actively seeking engaging experiences. - **CRM Managed Promotions**: Personalized CRM strategies to nurture player/consumer relationships and maximize loyalty. - **Data Intelligence**: Analysis of consumer behavior and campaign performance to refine marketing strategies. - **Acquisition & Engagement/Retention**: Multi-channel marketing to acquire and retain high-intent users. ## Market Standing - **Valuation/Market Cap**: Not disclosed - **Key Metric**: 60+ employees (81 per Built In, 86 per LeadIQ); 100+ active partnerships; 10+ years in business - **Notable Investors/Partners**: Not publicly available (no funding rounds disclosed) - **Growth Signals**: Recent rebrand/relaunch ("The Evolution"), launch of a graduate scheme with nine new hires, continuous hiring across data, marketing, product, and engineering teams. ## Competitive Advantages - **In-house technology stack** with full-stack analytics and proprietary platforms for campaign management. - **Compliance-first mindset** enabling operation in regulated sectors (e.g., gambling, financial services). - **Data-driven performance model** that measures, optimizes, and scales campaigns in real time. - **Deep industry insight** and 10+ years of experience in affiliate marketing. ## Strategic Focus - Scaling the technology platform and expanding the engineering team (e.g., hiring Senior Full Stack Engineer). - Strengthening the brand via a comprehensive rebrand and relaunch ("Welcome To The Evolution"). - Growing the graduate programme and investing in talent development. - Expanding into new high-growth sectors and geographies. ## Why Work Here - **Hybrid work model**: 3 days in-office (Tuesday–Thursday) at The Screenworks in Islington, London; flexible remote on remaining days. - **Benefits**: Competitive salary, company bonus scheme, private healthcare (Bupa), market-leading training programme, paid AI subscriptions (Claude/ChatGPT/Gemini), annual company conference, regular happy hours & team lunches, parental leave, recognition & reward scheme. - **Culture**: Values-driven (Build Together, Go All In, Be Brave, Push the Limits, Embrace Change); emphasis on diversity, equity, and inclusion; flat hierarchy with shared ownership; high-performance environment with collaboration and continuous learning. - **Engineering culture**: Growing tech team, modern stack, focus on building and scaling a platform for global reach. ## Sources 1. [quantum.media](https://www.quantum.media/) 2. [quantum.media/careers](https://www.quantum.media/careers) 3. [builtin.com](https://builtin.com/company/quantum-quantummedia) 4. [builtin.com (job posting)](https://builtin.com/job/senior-full-stack-engineer/8706456) 5. [leadiq.com](https://leadiq.com/c/quantum/615dc1d0990e636b3e5fba13/employee-directory) ## Other roles at Quantum - [Senior Data Engineer](https://feeny.ai/job/senior-data-engineer-quantum-london-070haxvtf3sj) — London, United Kingdom - [Graduate Data Engineer](https://feeny.ai/job/graduate-data-engineer-quantum-london-31akckh9kfyh) — London, United Kingdom - [Senior Full Stack Engineer](https://feeny.ai/job/senior-full-stack-engineer-quantum-london-g5wrmyyj21a8) — London, United Kingdom - [Paid Social Specialist](https://feeny.ai/job/paid-social-specialist-quantum-london-jhq0ejz3reyz) — London, United Kingdom - [Creative Strategist](https://feeny.ai/job/creative-strategist-quantum-london-esksqfh85qzt) — London, United Kingdom - [Head of Data Engineering](https://feeny.ai/job/head-of-data-engineering-quantum-london-zde1fq6p51ey) — London, United Kingdom - [Technical CRM Executive](https://feeny.ai/job/technical-crm-executive-quantum-london-01efyhw44ab6) — London, United Kingdom - [Technical CRM Specialist](https://feeny.ai/job/technical-crm-specialist-quantum-london-pxsf10g3v1xq) — London, United Kingdom - [Head of Business Development](https://feeny.ai/job/head-of-business-development-quantum-london-67tjfs65ref5) — London, United Kingdom - [Senior Frontend Engineer (Web & App)](https://feeny.ai/job/senior-frontend-engineer-web-app-quantum-maidstone-zq4aefxp4a9h) — Maidstone, United Kingdom