Senior UX Engineer - Prototyping Platforms

This role is completely remote-friendly . If you happen to live close to one of our physical office locations our doors are open for you to come into the office as often as you'd like.

The Reddit Proto team plays a pivotal role in bridging the gap between ambitious product and design vision and engineering reality. As we scale the team is responsible for moving the organization beyond one-off disposable prototypes toward robust reusable infrastructure. Our goal is to operationalize experimentation empowering researchers and designers to test hypotheses with live data at the speed of thought.

As a Senior UX Engineer on the Reddit Proto Team you will lead the evolution from one-off disposable prototypes to a robust platform for scaled experimentation. Inspired by the concept of an “invention factory” you will architect the modular systems that allow us to test bold ideas with internal stakeholders and external users alike. Your work will operationalize innovation turning the Proto Team into a strategic data-generating force that ensures our ability to explore validate and invent the future of Reddit scales alongside our user base.

You will take ownership of the technical strategy for design validation influencing how Reddit measures the success of new features before they enter production. This requires a unique blend of full-stack engineering capability systems thinking and a deep understanding of user-centered design principles. You will inspire the team to move faster and push the quality bar of our internal tooling.

Responsibilities:

• Shape the vision: Define the technical architecture for Reddit’s prototyping ecosystem. You will lead the strategy for how we transition from static designs to interactive data-driven experiments.

• Build the platform: Architect and maintain a robust web-based (React Next.js) prototyping environment. This infrastructure must be flexible enough to allow for dynamic swapping of screens and journeys for scaled A/B testing.

• Accelerate velocity: Partner closely with UXR to drastically reduce the time-to-insight for complex product questions. You will automate the “grunt work” of testing building tools that allow us to deploy quantitative tests to hundreds of users with minimal overhead.

• Bridge the gap: Act as the translation layer between Design concepts and Production engineering. You will manage real data flows to create experiences that feel authentic ensuring we are testing relevance rather than “happy-path” illusions.

• Tooling leadership: Identify repetitive workflows within the design organization and build internal tools or component libraries to solve them. If we are building it twice you build the tool that automates it.

• Mentorship: Cultivate a culture of technical curiosity within the design team establishing best practices for prototype engineering performance and code quality.

Required Qualifications:

• Experience: 5+ years of experience in UX Engineering Design Technology or Frontend Development with a focus on building systems platforms or complex internal tools.

• Technical Mastery: Deep expertise in the modern web stack (React Next.js Node Firebase Cursor). You are comfortable setting up infrastructure and architecture not just polishing UI.

• Systems Thinking: A portfolio or track record demonstrating the ability to build scalable frameworks component libraries or testing environments rather than just single-use websites.

• Strategic Leadership: Ability to identify “time sinks” in the design process and autonomously propose and build technical solutions to remove them.

• Bias for Action: You are a self-unblocker who thrives in ambiguity. You know when to hack for speed to prove a concept and when to engineer for stability to support a platform.

• Design Fluency: You speak the language of designers. You understand interaction design accessibility and the importance of fidelity in user research.

• Proven Impact: A track record of shipping internal tools or platforms that have measurably improved team efficiency or product outcomes.

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Pay Transparency:

This job posting may span more than one career level.

In addition to base salary this job is eligible to receive equity in the form of restricted stock units and depending on the position offered it may also be eligible to receive a commission. Additionally Reddit offers a wide range of benefits to U.S.-based employees including medical dental and vision insurance 401(k) program with employer match generous time off for vacation and parental leave. To learn more please visit https://www.redditinc.com/careers/ .

To provide greater transparency to candidates we share base pay ranges for all US-based job postings regardless of state. We set standard base pay ranges for all roles based on function level and country location benchmarked against similar stage growth companies. Final offer amounts are determined by multiple factors including skills depth of work experience and relevant licenses/credentials and may vary from the amounts listed below.

The base pay range for this position is:

$180200—$252300 USD