Senior Frontend Engineer, Ads Formats

Remote - United Statesfull timeRemote

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senior

$191k–$267k

H1B: yes

Reddit Senior Frontend Engineer at Reddit working on ad experiences across platforms with deep expertise in JavaScript, TypeScript, and browser technologies. Partner with Ads and Web Platform teams to improve developer efficiency and system reliability.

Responsibilities

Develop resilient frontend approaches to reduce ad disruptions, drawing on deep knowledge of JavaScript, TypeScript, HTML, CSS, the DOM, and browser networking.
Partner with Ads and Web Platform teams to integrate solutions into shared rendering infrastructure, frontend architecture, and build systems.
Design controlled experiments and phased rollouts to measure effectiveness while protecting site performance, accessibility, and user experience.
Build instrumentation and monitoring to track mitigation effectiveness, detect regressions, and guide iteration.
Implement ad rendering, event collection, click handling, browser extensions across multiple Ad formats.
Contribute to broader foundational improvements in web advertising reliability, performance, and measurement.
Raise engineering quality through thoughtful technical design, testing, code reviews, documentation, and mentorship.

Qualification

Comfort using CodexSound judgment in frontend architectureExperience using instrumentationTechnologies used on the team includeJavaScriptModern frontend testing

Required

5+ years of experience building production web applications with JavaScript, TypeScript, and/or React.
Comfort using Codex, Cursor, Claude, or comparable agentic coding tools in day-to-day software development.
A track record of independently delivering complex frontend projects from technical design through launch and iteration.
Sound judgment in frontend architecture, state management, component design, testing, and API integration.
Experience building polished user interfaces with close attention to usability, performance, accessibility, and maintainability.
Ability to work effectively through ambiguous product and technical problems.
Strong communication and collaboration skills across engineering, product, design, and data disciplines.
Experience using instrumentation, experimentation, or product metrics to understand and improve user experiences.
A habit of improving engineering quality through code reviews, documentation, and technical mentorship.

Preferred

Experience working with various ad formats (video ads, display ads, etc)
Technologies used on the team include
JavaScript, Typescript and React
Modern frontend testing, experimentation, and observability tools

Benefits

Dental
Vision
401(k)
Equity/RSU
Parental Leave
Wellness

Company

Reddit

View company page

1001-5000 employees

Social Media

Founded 2005

Source: greenhouse

Active within the past hour

Remote-friendly

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