Staff Engineer, Experimentation

About the Role: As a Staff Engineer on LaunchDarkly's Experimentation team, you'll build the platform that helps engineering teams make data-driven decisions with confidence. This role sits at the intersection of data science and platform engineering, designing the statistical engine, warehouse-native analysis pipelines, and adaptive experimentation systems (including contextual bandits) that power customers' most important decisions.

• Build the experimentation statistical engine — hypothesis testing, sequential analysis, variance reduction (CUPED, Winsorization), power analysis.
• Design warehouse-native experimentation that runs analysis inside customer warehouses (Snowflake, Databricks, Redshift, BigQuery).
• Lead adaptive experimentation — contextual bandit systems, Bayesian optimization, automated allocation.
• Drive the platform roadmap with product, design, and data science.
• Collaborate cross-functionally with Warehouse Integrations, SDK, Platform, and Data Science teams.
• Mentor engineers and raise the team's bar for statistical rigor and system design.
• Own operational excellence — monitoring, observability, incident response, on-call.

• 10+ years building large-scale experimentation platforms, statistical analysis systems, or data-intensive backend services.
• Applied-statistics knowledge: hypothesis testing, sequential analysis, variance reduction (CUPED), power analysis, experiment design.
• Experience with adaptive experimentation ML — contextual bandits, Thompson sampling, Bayesian optimization, or RL-based allocation.
• Track record designing warehouse-agnostic systems across Snowflake, Databricks, Redshift, BigQuery, or similar.
• Expertise in Go, Python, or similar for backend services and statistical computation.
• Experience with event-driven architectures, data pipelines, and large-scale data processing.
• Cloud environments (AWS, GCP) with infrastructure-as-code.
• Technical leadership: setting direction, breaking down complex problems, influencing across teams.

Compensation: Target pay ranges based on Geographic Zones for Level 5: Zone 1: $214,800 - $295,350; Zone 2: $193,400 - $265,870; Zone 3: $182,600 - $251,020. Exact compensation may vary based on skills, experience, and location. In addition to salary, LaunchDarkly offers Restricted Stock Units (RSUs), health, vision, and dental insurance, and mental health benefits.

About LaunchDarkly: LaunchDarkly is a feature management platform that helps developers innovate on new features faster while protecting them with a safety valve to instantly rewind when things go wrong. The platform processes trillions of evaluations daily and enables gradual rollouts, targeted experiences, and experimentation.