Software Engineer, Experimentation

Summary

Join our Experimentation team to build and scale feature flagging systems. Leveraging JavaScript/TypeScript, Node.js, and cloud-native databases, you will develop innovative solutions for our experimentation platform, including the Flags SDK. Your work will directly impact customers by enabling data-driven decisions through enriched insights. You will help answer critical questions about feature performance and system health. This role requires hands-on experience scaling feature flag systems and a willingness to challenge conventional approaches. The position is remote-based in the UK, Germany, or the Netherlands. You will collaborate with cross-functional teams to deliver large-scale experimentation features.

Requirements

• 3+ years of experience building and scaling feature flag and experimentation systems in production environments
• Proficiency in TypeScript/JavaScript and Node.js with a track record of building high-performance distributed systems
• Strong understanding of experimentation methodologies, A/B testing, and statistical analysis for feature validation
• Experience with SQL and NoSQL databases, data pipelines, and real-time data processing at scale
• Deep understanding of SDK design principles and experience building developer-friendly client libraries
• Familiarity with observability practices and integrating telemetry data across distributed systems
• Proven ability to challenge existing solutions and propose innovative approaches to complex technical problems
• Excellent problem-solving abilities and effective communication skills, especially when collaborating with diverse teams

Responsibilities

• Enable customers to measure experiment impact by surfacing feature flags and experimentation as first-class citizens across the Vercel platform
• Design and implement deep platform integrations to surface feature flag data across our entire ecosystem
• Build and evolve our Flags SDK and partner integrations to deliver lightning-fast feature flag resolution at scale
• Rethink traditional approaches to feature flagging and experimentation, proposing innovative solutions that push industry boundaries
• Collaborate with cross-functional teams to deliver large-scale experimentation features with cross-team dependencies
• Develop APIs and data pipelines that process billions of flag evaluations while maintaining low latency
• Maintain and operate services at high scale, participating in scheduled on-call rotations to ensure reliability

Benefits

• Competitive compensation package, including equity
• Inclusive Healthcare Package
• Learn and Grow - we provide mentorship and send you to events that help you build your network and skills
• Flexible Time Off
• We will provide you the gear you need to do your role, and a WFH budget for you to outfit your space as needed