Senior Full Stack Engineer, Experimentation

New

This is a remote opportunity and we would be interested in applications from the UK, Ireland, Sweden, Spain and Germany.Full-TimeSenior

SalaryIn the UK, the base compensation range for this role is £94,000 - £118,000. All of our roles include Restricted Stock Units (RSUs)

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Job Details

Build and operate production web applications with TypeScript and React.
Have backend services experience in Go or a similar language, with willingness to work in Go.
Value maintainability, automated testing and secure development practices.
Have experience building an in-house experimentation or A/B testing platform, or integrating an existing platform.
Be comfortable working with event data, SQL and data warehouses such as BigQuery.
Have delivered complex projects with minimal supervision and worked through short feedback loops from analysis and design to iteration.
Have experience being on call and supporting software in production.
Know how to make systems observable and debuggable.
Use AI coding tools thoughtfully, validate their output and share practices that improve speed and quality.
Be able to explain technical and statistical tradeoffs to engineers, analysts and product managers in a remote, asynchronous environment.

Own features end to end across the React frontend and Go backend, from problem framing and design through rollout, measurement and iteration.
Build workflows for defining hypotheses, configuring experiments and metrics, managing experiment lifecycles, and exploring results.
Evolve the experimentation SDK and its OpenFeature and Faro integrations to support consistent identity and event contracts.
Integrate with Grafana Faro and Frontend Observability to capture flag exposures and outcomes, and link results to Session Replay and user journeys.
Extend the statistics engine and improve the scalability, cost-awareness and correctness of analysis.
Extend Grafana Assistant integration for experiment authoring, explanation and reporting.
Mentor teammates through code review, pairing and design docs, and write architecture decision records, documentation and demos.
Take part in on-call for services you build and support internal teams running experiments.

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