Principal Engineer

Principal Software EngineerLocation: London - HybridSalary: Up to 110,000 + Bonus & BenefitsWe're looking for a Principal Software Engineer to join a global technology business whose platforms underpin consumer experiences used by millions of people every day. This is an established, scaled business with a genuinely global reach and this role sits at the heart of their core engineering capability.This isn't a purely strategic seat. You'll have genuine technical authority over a business-critical API platform while staying close to the engineering, partnering with skilled squads to solve complex distributed systems challenges at scale.Key Responsibilities:Set the technical direction for a large-scale API platform across both synchronous and event-driven servicesLead architectural design across a modern, cloud-native stackDrive continuous improvement across security, observability, performance, and long-term maintainabilityMentor and develop engineers and technical leads across multiple teamsWork closely with Product and Delivery leadership to keep engineering strategy aligned with broader business goalsChampion strong engineering fundamentals — testing, CI/CD, infrastructure as code, and clean architectureIdentify practical ways to bring emerging technologies, including AI tooling, into everyday engineering workflows~Key Requirements:A strong track record delivering large-scale distributed systems in cloud environmentsDeep knowledge of API design - REST and GraphQL, and substantial hands-on experience with Kafka in a production environmentSolid cloud platform experience, particularly AWS, and comfort with containerised infrastructureProficiency in TypeScript across a modern backend stackExperience leading and influencing across multiple engineering teams, not just within a single squadA genuine care for code quality, sustainable architecture, and long-term thinking over short-term deliveryA collaborative, mentoring leadership style that brings the best out of the people around youAn interest in how AI is changing the way engineering teams workEnterprise CRM experience would be an advantageWhat's on Offer:Salary Up to 110,000 plus bonusGenuinely flexible hybrid working arrangementsGenerous parental leave and family-friendly policiesStrong support for career development and progressionThis is the right role for a Principal Engineer who is ready to move beyond squad-level impact and take on something bigger - shaping the architecture, the team, and the direction of a platform that matters at real scale.Unfortunately, due to the high volume of applications, not everyone will be able to receive detailed feedback..