Principal UX Engineer, Ads

About the role

Reddit is a community of communities. It is built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet. Every day, Reddit users submit, vote, and comment on the topics they care most about. With 100,000+ active communities and approximately 130 million daily active unique visitors, Reddit is one of the internet's largest sources of information. For more information, visit www.redditinc.com. The Ads Design and Research team shapes the end-to-end advertising experience across advertiser tools, consumer ad experiences, measurement, and the systems that connect them. The role is a strategic, hands-on position at the intersection of design and engineering. You will use code as a product-design medium to bring ambitious ideas to life, explore and validate new directions, and help teams make better product decisions earlier. You will partner closely with Design, Research, Product, Engineering, and Data Science while staying deeply involved in the craft.

Key facts

What you'll do

Define and lead the UX engineering strategy across multiple areas of Reddit Ads to ensure coherence and long-term scalability.

Build high-quality, functional prototypes and product experiences that help teams explore ideas, test assumptions, and make better decisions efficiently.

Partner with senior cross-functional leaders to shape product direction and bring clarity to complex, ambiguous opportunities through structured exploration.

Create reusable tools, systems, components, and workflows that lower the barrier for design and research to move smoothly into production.

Raise the bar for interaction quality, accessibility, performance, and technical craft across the Ads experience through rigorous standards and mentorship.

Explore how AI can improve both advertiser products and the way our teams design and build them responsibly and effectively.

Mentor other practitioners and help grow UX Engineering as a capability across Reddit by fostering collaboration and knowledge sharing.

Champion data-informed design decisions by integrating analytics and user feedback into iterative improvements in the advertising journey.

Collaborate with product managers and engineers to translate business goals into coherent, user-centered experiences that balance reach, relevance, and trust.

Lead discovery and synthesis activities to uncover unmet advertiser needs and translate them into actionable product opportunities.

Establish best practices for prototyping, usability testing, and cross-team alignment to accelerate delivery of high-quality features.

Drive the definition of done for UX engineering work to ensure consistency, robustness, and maintainability of the product surface.

Contribute to open-source and internal tooling where appropriate to amplify the impact of design and engineering efforts.

Act as a bridge between design and engineering, ensuring that intent is preserved through implementation and feedback loops.

Requirements

Deep experience at the intersection of product design and engineering, with a track record of building sophisticated interactive products that serve diverse user needs.

Strong hands-on expertise with modern frontend technologies such as React and TypeScript, along with a solid understanding of component architecture and state management.

Excellent product and interaction judgment, with the ability to turn complex ideas into intuitive, high-quality experiences that scale.

Experience working across multiple teams or product areas and influencing product direction beyond a single project through collaboration and advocacy.

Strong systems thinking, with experience creating reusable patterns, platforms, or tools that help other teams move faster and reduce duplication of effort.

The ability to navigate ambiguity, make thoughtful tradeoffs, and bring design, engineering, product, and research perspectives together into coherent solutions.

Strong communication and collaboration skills, particularly with senior cross-functional partners who rely on clarity and concise decision-making.

A passion for staying hands-on while helping others do their best work through mentorship, code reviews, and constructive feedback.

A commitment to inclusive design principles and a demonstrated ability to build experiences that are accessible and performant under real-world conditions.

A history of owning end-to-end product outcomes and understanding how design decisions impact engineering constraints and business metrics.

Nice to have

Experience in advertising is helpful, but it isn't required. We're also interested in people who have worked on complex products such as marketplaces, enterprise tools, analytics, commerce, developer platforms, AI-powered experiences, or other multi-sided ecosystems.

Practical notes

This is a full-time position located in the United States with remote work eligibility. The compensation includes a base salary range aligned with level P7. No additional benefits details are specified beyond those listed in the compensation section.