Senior Full Stack Engineer | Experimentation - Product Analytics | Spain | Remote

Role overview Own the engineering of an experimentation platform that helps teams run A/B tests and understand how product changes affect user behavior. You’ll take an existing internal app toward production as a customer-facing product, working across its frontend, backend, integrations, and release lifecycle with analysts, data specialists, engineers, and product stakeholders.

Responsibilities - Shape and deliver features end to end, from problem definition and design through implementation, rollout, and measurement. - Build across a TypeScript and React frontend and a Go backend within an app platform. - Develop experiment configuration and management capabilities, including integrations with feature flags and product telemetry. - Work with data and engineering partners on event pipelines, analysis, and connections to other product capabilities. - Improve the app’s reliability and usability as it grows from internal use toward broader availability. - Collaborate with product stakeholders so experiment results support sound decisions.

Requirements - Senior-level full stack software engineering experience and a record of shipping production code. - Strong experience building web applications with TypeScript and React. - Experience developing backend services in Go. - Ability to own work across the software lifecycle and collaborate with teams in different disciplines. - Interest in experimentation and building tools that help teams evaluate product changes.

Nice to have - Familiarity with feature flag systems, product analytics, or experimentation methods. - Experience with Kubernetes-style resource management, declarative configuration, or GitOps workflows. - Exposure to Bayesian analysis, data pipelines, or observability products.

Benefits and work setup - Remote role open to applicants in Spain. - Global remote team, with an in-person onboarding component. - The stated annual leave policy is 30 days, including three designated company shutdown days, subject to local law. - Equity through RSUs is described as part of the compensation approach.