Principal Engineer - Scalable SaaS / Data PlatformsLocation: UK remote (optional office presence - South West)The BriefWe are supporting a fast-growing technology organisation in the search for a Principal Engineer to help scale a complex, globally deployed SaaS platform.This is a senior individual contributor role with strong technical leadership expectations - ideal for someone who enjoys solving complex engineering challenges at scale while influencing architecture and engineering direction.The OpportunityYou will take ownership of critical areas of a large-scale platform, helping to evolve architecture, improve performance, and support rapid international growth.Working closely with engineering leadership and cross-functional teams, you will:Lead design and architectural decisions across key product areasBuild and scale distributed systems handling high-volume data workloadsSupport the evolution of a SaaS platform serving global enterprise customersInfluence engineering standards, tooling, and best practice across teamsPartner with product and technical stakeholders to shape roadmap directionDrive improvements across scalability, resilience, and performanceA key focus will be scaling platform capability - supporting increased data volumes, users, and integrations while maintaining reliability and speed.The CandidateWe are looking for an experienced engineer with deep technical expertise and a track record of operating at scale:Strong background in software engineering and