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

• 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

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