IT & Software

Principal Engineer

MOO

London · Greater London · United Kingdom

Overview

As a Senior IC in MOO's Platform group, you shape the architecture for the end-to-end order journey across storefront, checkout, manufacturing, and post-purchase tooling. You lead strategic technical decisions, mentor engineers, and enable cross-team delivery with observable, resilient, and cost-efficient systems. You drive AI-assisted development standards and governance to sustain velocity and quality. You partner with Product, Operations, and Customer Service to translate requirements into pragmatic platform improvements. This role offers impact at scale within a fast-growing ecommerce ecosystem.

Pay / Benefits
  • 25 days holiday (rising with years)
  • matched pension scheme
  • paid parental leave
  • private healthcare
  • life insurance
  • season ticket loan
Responsibilities
  • Define the architectural roadmap for the end-to-end order journey across storefront, design tooling, checkout, payments, order orchestration, manufacturing, fulfilment and customer service tooling
  • Lead cross-team initiatives to increase throughput and reduce cost-to-serve while ensuring peak trading readiness
  • Improve observability and operability across the buy-to-deliver flow and reduce manual interventions
  • Set standards for AI-assisted development and governance with Security, Legal and Platform
  • Standardise data pipelines and surface aggregates to enable a 360-degree order view for Customer Service and Operations
  • Mentor Staff and Senior Engineers; facilitate design reviews, hackathons, and workshops; align stakeholders on high-impact solutions
  • Translate operational, customer service and commercial requirements into pragmatic platform improvements
  • Collaborate with UK-based engineers and global stakeholders in East Providence, Rhode Island and Dagenham
Key requirements
  • Proven track record shaping architecture and delivery for complex ecommerce estates at scale
  • Depth in at least one part of the order journey (storefront, checkout, orchestration, manufacturing, fulfilment, shipping, Customer Service tooling) with breadth across others
  • Expertise in designing service and event contracts, data flows and reliability patterns for multi-team shipping
  • Experience navigating peak trading and explaining what broke and how it was fixed
  • Considered view on AI-assisted development and its appropriate use in professional engineering
  • Ability to align Operations, Customer Service, Product and Engineering and translate architecture into business impact
  • Experience working with teams across multiple time zones
  • Balance migration efforts with tactical scaling in live systems
  • Stakeholder alignment
  • Mentorship and facilitation
  • Effective communication of architectural concepts
  • Architecture leadership for ecommerce platforms
  • Service and event contracts, data pipelines
  • Observability and reliability engineering

Reference: WJ-747_30170763

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