Principal Engineer Post-Purchase & Fulfilment | London (Hybrid) | Up to £155,000 Principal Engineer's! Own the end-to-end architecture of how a physical product moves from factory floor to customer doorstep. Design led consumer brand with over 30 million customers worldwide. This is a rare IC role with genuine architectural whitespace. You won't be maintaining a finished system. You'll be shaping one. Stack: event-driven architecture on AWS (EventBridge, SNS/SQS, Lambda, DynamoDB), Temporal for order orchestration, and Tulip for manufacturing execution, with investment in Snowflake, DataDog, and AI-assisted engineering. What makes this role unusual: ? You own both the manufacturing execution system and the customer-facing post-purchase experience ? Senior IC scope: reporting to the Head of Engineering, peer to Product leadership, hands-on with the CTO on technical direction ? Architecture is democratised: ADRs and design reviews are peer-driven, not top-down. ? Active AI investment: automated alerting, test generation, and doc updates are already on the roadmap What we're looking for: ? Experience owning manufacturing or fulfilment systems end-to-end (MES, WMS, OMS, batching/scheduling logic) ? Strong event-driven architecture background designing contracts and failure recovery, not just using the tools ? Proven ability to lead technical direction across multiple teams without direct authority ? Stakeholder fluency: comfortable presenting to and pushing back on Ops, CS, and Product leadership Up to £155,000 base | London | 2 days per week on-site If this resonates, apply or reach out directly.