Product Engineer (Growth)

About the Role

Join a fast-growing, engineering-heavy open-source LLM observability platform that sits at the center of how developers build, monitor, and improve AI applications. The platform provides tracing, prompt management, evaluation, experimentation, and cost/latency monitoring — and is trusted by a large share of the Fortune 50 with millions of monthly SDK downloads.

As a Product Engineer on the Growth team, your work will directly influence the most important growth metrics: top-of-funnel, activation, adoption, and expansion. You'll have high ownership, real data to work with, and the latitude to run big bets on how the product grows.

What You'll Do

• Understand how users engage — build and maintain a data stack (e.g. PostHog, BigQuery, dbt, Metabase) to generate insights into user behavior and map core product funnels for each feature area.
• Improve activation — reduce time-to-value for new users through in-product guidance, onboarding flows, and self-serve improvements.
• Drive adoption and expansion — identify drop-off points in the product and ship experiments (A/B tests, feature nudges) to increase feature breadth adoption across the product suite.
• Build and maintain SDKs and integrations — own client-side SDK packaging, versioning, multi-language releases, and developer-facing integrations.
• Collaborate cross-functionally — work closely with product, design, marketing, and sales to align growth initiatives and communicate technical tradeoffs clearly.
• Stay at the frontier — experiment with agentic workflows and shape how the platform supports the next generation of LLM application developers.

What We're Looking For

Required

• Legal authorization to work in the EU without employer sponsorship
• Based in the EU, working EU timezones, and willing to spend approximately one week per month in the Berlin office
• Practical experience building or integrating LLM-based applications, prompt management, LLM evaluation, or observability for LLM systems
• Proficiency with SQL and experience querying/analyzing product and usage data in analytical or columnar databases (ClickHouse experience is a plus)
• Experience instrumenting products for metrics, event tracking, tracing, and A/B experimentation to drive growth outcomes
• Experience developing and maintaining client SDKs or integrations (packaging, versioning, multi-language clients, CI/CD releases)
• Strong product sense and ability to work cross-functionally and communicate technical tradeoffs to non-technical stakeholders
• Comfortable operating with high ownership in a small, fast-moving, engineering-heavy team

Nice to Have

• Experience contributing to or working with open-source projects and community-driven development workflows
• Background at companies in the LLM tooling, MLOps, or developer infrastructure space

Compensation & Benefits

• Salary: €90,000 – €160,000 per year (depending on experience)
• Equity participation
• Opportunity to work on a high-impact open-source product at the frontier of AI development

Location

• Hybrid / Remote across EU timezones (Germany, Austria, Switzerland, UK, Netherlands, France, Spain, Sweden, Poland, and others)
• Approximately one week per month in Berlin, Germany
• No visa sponsorship available