Senior Software Engineer - Activation

key responsibilities include** - Build user-facing onboarding flows, contextual nudges and interactive elements across logged-in and logged-out experiences. - Develop systems that read early-funnel signals to understand user intent and route new users to relevant product paths. - Deliver end to end across the stack, in React and TypeScript on the frontend and Python, Go or Kotlin on the backend. - Run A/B tests and fast feedback loops so improvements to activation are measured rather than assumed. - Own the observability, reliability and developer experience of the systems the Activation team runs. **Requirements** - 4+ years of experience in React, TypeScript and modern CSS and HTML. - Experience in backend development (Python, Go or Kotlin). - A proven track record in full-stack product development, including backend-for-frontend patterns and event-driven systems. - Experience in analytics instrumentation and experimentation, covering event tracking, A/B testing, feature flags and using data to judge product impact. - Comfortable in working AI-first, with agentic tools as part of everyday craft. - Strong collaborative skills and being able to comfortably drive ambiguous problems towards clarity and implementation. **It would also be music to our ears if you have** deep experience architecting scalable web applications in React and TypeScript, including server-side rendering, frontend architecture and performance work, along with familiarity with observability tooling and experimentation and product analytics platforms. **Equal opportunity employer** We believe that bringing people together from different backgrounds, experiences and perspectives makes for a healthy workplace, a more successful business and a better world. We value diversity and encourage everyone to come and soundtrack the world with us. **Application** Ready to make the world _feel_ your work? Please apply, in English. [Apply for this Job](https://jobs.ashbyhq.com/epidemic-sound/ad7bf37c-281b-4426-980e-ca0d66c26ef6/application)