Staff Engineer, Reddit

• A Bachelor's degree in Computer Science, Statistics or a similar STEM field or equivalent experience
• 8+ years of software engineering experience
• Domain knowledge in Ads tech and experimentation methodology. Software development experience in backend or data-intensive systems
• Proficient in at least one of the following: Python, Go, Java, C/C++
• Strong understanding of system design, algorithms, and data structures
• A strong understanding of the fundamentals of experimentation and causal measurement, including randomization, holdouts, confounders, statistical significance, and power

Desirable

• Ads Measurements team’s mission is to enable advertisers to measure and verify the effectiveness and efficiency of their investments on Reddit using a complete toolkit of 1P and 3P measurement solutions, and provide prescriptive recommendations to enable clients to optimize the value of their investment
• At Reddit, the Ads Lift Measurement team is dedicated to enabling advertisers to accurately assess and enhance the real business impact of their advertising spend on our platform
• We deliver clear, actionable insights via sophisticated measurement tools, including Brand Lift, Conversion Lift and Split Tests
• Our core function involves developing client-facing products and robust, scalable infrastructure
• This foundation supports large-scale experimentation, rigorous causal inference, and informed, data-driven strategy
• This work is vital to Reddit's advertising ecosystem, directly fueling both strategic business understanding and revenue expansion
• As a Staff Engineer, you will be expected to be the technical leader on the team and in the Ads Measurements organization
• You must be able to take on ambiguous problems, design a solution, then lead other engineers in implementing that solution
• You'll work on end-to-end product development and contribute to high-performance systems that measure and maximize ad effectiveness
• You’ll collaborate with product managers, data scientists, and platform engineers to solve complex technical challenges that directly impact Reddit’'s advertisers and end users
• You must also be able to identify problems independently, not just be assigned work to complete
• Excellent skills in designing maintainable, scalable distributed systems are a must. Finally, mentorship is a requirement, you would be expected to make the people around you better
• Lead the complete lifecycle of features for ads lift measurement products, including architectural design, implementation, deployment, and maintaining ongoing reliability
• Rigorously evaluate campaign performance by expanding core products such as Split Test, Conversion Lift, and Brand Lift, thereby enhancing capabilities for advertisers
• Build automated data validation, randomization/holdout integrity checks, imbalance diagnostics, and continuous verification/backtesting
• Collaborate with the Engineering Manager to form the long term technical vision and strategy for Ads Lift Measurement for the next 2+ years
• Mentor engineers, share industry knowledge, and contribute to the technical growth of the team
• Stay updated on state-of-the-art products and technologies, recognizing promising innovations, identifying gaps, and adapting them to Reddit's unique platform and community