Principal UX Engineer, Ads at Reddit

The role

This Principal UX Engineer role sits at the intersection of design and engineering within Reddit’s Ads Design and Research team. You will use code as a design medium to build functional prototypes and shape the end-to-end advertising experience. The position involves strategic leadership to influence product direction and improve technical craft across the organization.

What you'll do

• Define and lead the UX engineering strategy across multiple Reddit Ads areas
• Build high-quality functional prototypes to explore ideas and test assumptions
• Partner with cross-functional leaders to shape product direction and clarify opportunities
• Create reusable tools and systems to streamline the design-to-production workflow
• Improve interaction quality and accessibility standards across the advertising experience
• Mentor other practitioners to grow the UX Engineering capability across the company

What you'll bring

• Deep experience at the intersection of product design and engineering
• Strong hands-on expertise with modern frontend technologies like React and TypeScript
• Proven ability to turn complex ideas into intuitive and high-quality experiences
• Experience creating reusable patterns or platforms that help teams move faster
• Excellent communication skills for collaborating with senior cross-functional partners

Your impact

You will drive the evolution of Reddit’s advertising platform by bridging the gap between design and production through high-fidelity prototyping and systems thinking. Your work will enable faster decision-making and higher quality product releases while establishing UX engineering as a core strategic capability. Ultimately, you will enhance the experience for millions of daily users and advertisers through technical innovation and mentorship.