Then Just Eat Takeaway.Were a leading global online delivery platform, and our vision is to empower everyday convenience.
Below, you will find a complete breakdown of everything required of potential candidates, as well as how to apply Good luck.
Whether its a Friday-night feast, a post-gym poke bowl, or grabbing some groceries, our tech platform connects tens of millions of customers with hundreds of thousands of restaurant, grocery and convenience partners across the globe.
We are building the next evolution of intelligent systems. As a Principal Engineer, you will design and lead the development of our Cognitive Operating System: the core infrastructure enabling autonomous agents to reason, learn, and operate at scale.
Youll sit within a high-impact engineering leadership group, partnering closely with Product, Data, and Engineering leaders to shape AI-native capabilities. This is a defining opportunity to influence a major technology shift, helping transition from traditional software to adaptive, intelligent systems that continuously improve and deliver value for our customers.
Design scalable memory and context systems, bridging short-term interactions with long-term organisational knowledge.
Develop next-generation AI infrastructure optimised for high-throughput inference, GPU orchestration, and non-deterministic workloads.
Lead Continuous Evaluation frameworks, including automated testing, LLM-as-a-judge systems, and real-time safety monitoring.
Create feedback loops that capture agent interactions to continuously improve model performance and system intelligence.
Collaborate with data teams to build low-latency pipelines that transform raw data into retrieval-ready knowledge for AI systems.
Define semantic governance standards, including embedding strategies, versioning, and caching for reliable agent performance.
Influence engineering teams to adopt agent-ready architectures, ensuring systems are interoperable and machine-readable.
Provide technical leadership on AI ethics, security, and cost efficiency, helping teams deliver responsibly at scale.
Strong experience with vector databases, graph databases, and knowledge graph-based retrieval systems.
Proven ability to design and scale AI infrastructure, including inference systems, GPU orchestration, and fine-tuning pipelines.
Solid background in distributed systems, event-driven architectures, and high-scale backend engineering (Python, Go, or Rust).
Strong collaboration skills, working closely with product, data, and engineering leaders to deliver shared outcomes.
Experience building platforms that continuously learn and improve through data feedback loops.
Strong sense of ownership and accountability, balancing speed with quality and long-term impact.
Passion for shaping the future of AI, with a responsible approach to ethics, safety, and system reliability.
Our teams forge connections internally and work with some of the best-known brands on the planet, giving us truly international impact in a dynamic environment.
They guide every interaction, every decision, every innovation. Fun, fast-paced and supportive, the JET culture is about movement, growth, helping one another to succeed and celebrating wins. xohmjla By truly living our values and embodying our behaviours, were building a customer-first culture which enables us to stay one step ahead of the competition.
Inclusion, Diversity & Belonging