Principal Product Engineer (up to £250k)

Dex; Greater London; Hybrid; GBP 120,000 - 180,000; Full time

Job summary

Dex is seeking a Principal Product Engineer to set the technical strategy for the entire engineering organization, balancing hands-on delivery with high-leverage code changes. You will define architecture across multiple squads, mitigate systemic risks, and scale production systems to serve thousands of users across regions.

You will collaborate with executives to translate business goals into technical roadmaps, mentor senior engineers, and drive cross-functional alignment in a hybrid setup

Qualifications

• Proven track record defining architecture and technical strategy across multiple squads.
• Deep full-stack engineering foundations with production-scale systems experience.
• Strong business sense and ability to translate engineering constraints into strategy.
• Hands-on with AI integration and modern model capabilities in products.
• Excellent communication with executives and cross-functional teams.

Responsibilities

• Set overarching technical architecture and engineering standards as AI capabilities embed into the product.
• Identify and resolve systemic architectural risks and dependencies between squads.
• Develop and deploy scalable systems handling high throughput and global users.
• Partner with executives to turn business goals into pragmatic technical roadmaps.
• Mentor senior engineers through system design reviews and hands-on pairing.

Skills

Architecture strategy

Full-stack engineering

Cross-team collaboration

AI fluency

Executive communication

Job description

This role is with one of Dex's trusted partner companies. We work closely with their teams to truly understand their culture, goals, and what they're looking for, so we can match you with the right opportunity and give you context about the role before you commit to a process.

The role

Over 120,000 frontline public-service workers across hundreds of organisations rely on this company's platform every day to handle real-time interpretation, note-taking, and call management. Backed by leading global tech founders and scaling rapidly, they are deploying production AI where system reliability directly affects people in crisis, converting high-friction civic administration into immediate human support.

As the product organisation expands, the hardest technical challenges no longer sit neatly within a single squad—they live in the seams between them. As Principal Product Engineer, you will set the technical strategy for the entire department, untangle systemic cross-team risks, and stay hands-on with high-leverage code shipping to production multiple times a day. This is not an ivory-tower architecture role isolated from delivery, nor is it a squad lead with a loftier title; it is the technical anchor for the entire engineering organisation.

The work

• Set the overarching technical architecture and engineering standards as AI capabilities are embedded across the core product.
• Identify and resolve systemic architectural risks, bottlenecks, and dependencies that sit between individual product squads.
• Write and deploy critical systems that scale globally, shipping to more than 100,000 active users multiple times a day in tight iteration cycles.
• Partner with executive and cross-functional leadership to turn business goals into pragmatic technical roadmaps.
• Mentor and raise the ceiling for the department's most senior engineers through system design reviews and hands-on pairing.

What You Bring

• Proven track record defining architecture and technical strategy across multiple squads, not just an isolated team.
• Deep full-stack engineering foundations with direct experience evolving and hardening high-throughput production systems under scale.
• Strong commercial and product instinct, with the communication clarity to advise executives and translate engineering constraints into business decisions.
• Active technical fluency with AI and a clear perspective on how modern model capabilities should be integrated into product engineering.
• Ability to work in a hybrid capacity from central London.