Principal Software Engineer, GPS

In this role you will shape the technical approach for AI solutions in the public sector, working with senior engineers to turn ideas into working prototypes. You will lead early engagements, define architecture, and ensure scalable, secure implementations that can be reused across clients. Mentoring is a core aspect as you elevate engineering standards and help grow the next generation of technical leaders. Based in London, you’ll help Scale deploy repeatable AI blocks that transform public sector operations and citizen services.

• Lead the hardest technical problems across programs and unblock project paths
• Steer the technical side of early engagements with clients, scoping problems and shaping proofs of concept
• Build rapid prototypes including AI agents, evaluation pipelines, data and knowledge systems, and take promising ideas to production
• Define cohesive, secure and reusable technology architectures across clients
• Mentor engineers through pairing, design and code reviews to raise engineering excellence
• Collaborate with Directors, VPs, and client executives, including travel when needed
• Turn field learnings into reusable capabilities and contribute components back to the core platform
• Champion agentic engineering and push AI capabilities and day-to-day coding practices

• Bachelor in Computer Science, Mathematics or related quantitative field
• 10+ years of post-graduation engineering experience
• Proficiency in Python, TypeScript/JavaScript, Java, or C++
• 5+ years applying AI/ML in production (generative/agentic AI, RAG, evaluation pipelines)
• Strong problem-solving skills turning ambiguous problems into prototypes and production
• Deep expertise in system design and cloud-based ML tools (AWS, GCP, Azure)
• Experience mentoring engineers and raising technical bar
• Comfort working directly with clients including senior executives
• Excellent written and verbal communication in cross-functional settings

• Strong problem-solving
• Mentoring and leadership
• Client-facing communication
• Python
• TypeScript/JavaScript
• Java