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Principal Software Engineer
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Principal Software Engineer Location: London - Hybrid Salary: Up to £110,000 + Bonus & Benefits
We'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 services Lead architectural design across a modern, cloud-native stack Drive continuous improvement across security, observability, performance, and long-term maintainability Mentor and develop engineers and technical leads across multiple teams Work closely with Product and Delivery leadership to keep engineering strategy aligned with broader business goals Champion strong engineering fundamentals — testing, CI/CD, infrastructure as code, and clean architecture Identify practical ways to bring emerging technologies, including AI tooling, into everyday engineering workflows~
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Key Requirements:
A strong track record delivering large-scale distributed systems in cloud environments Deep knowledge of API design - REST and GraphQL, and substantial hands-on experience with Kafka in a production environment Solid cloud platform experience, particularly AWS, and comfort with containerised infrastructure Proficiency in TypeScript across a modern backend stack Experience leading and influencing across multiple engineering teams, not just within a single squad A genuine care for code quality, sustainable architecture, and long-term thinking over short-term delivery A collaborative, mentoring leadership style that brings the best out of the people around you An interest in how AI is changing the way engineering teams work Enterprise CRM experience would be an advantage
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What's on Offer:
Salary Up to £110,000 plus bonus Genuinely flexible hybrid working arrangements Generous parental leave and family-friendly policies Strong support for career development and progression
This 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.
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