GTM Engineer

About Langfuse

• Open Source LLM Engineering Platform that helps teams build useful AI applications via tracing, evaluation, and prompt management (mission, product)
• We have the chance to build the "Datadog" of this category; model capabilities continue to improve but building useful applications is really hard, both in startups and enterprises
• Largest open source solution in this category: >2k customers, >14M monthly SDK downloads, >6M docker pulls
• We raised money from world class investors (Y-Combinator, Lightspeed, General Catalyst) and are default alive by making more money than we spend
• We're a small, engineering-heavy, and experienced team in Berlin and San Francisco (how we work)

We have significant traction (we’re default alive), growing fast, and are looking for a technical profiles to build out our Go To Market functions in-person either in San Francisco or Berlin, Germany.

As an early GTM hire, you’ll shape Langfuse’s commercial engine end-to-end:

• Help customers adopt and understand Langfuse for their use cases.
• Own the full sales cycle: lead prioritization, product-led lead generation, pipeline management, technical POCs, negotiations, and closing deals.
• Develop customer success strategies to ensure retention, upsells, and product adoption.
• Build feedback loops between sales, support and product development.

• Design and implement CRM workflows, sales pipelines, and documentation (public sales materials, contracts, order forms).
• Experiment with pricing, packaging, and sales strategies for both sales-led and product-led motions.
• Maintain a rigorous system for tracking leads, engagement, and outcomes.

• Understand Langfuse’s architecture and use cases to articulate our value proposition effectively.
• Translate customer requirements (technical, compliance, business) into actionable product feedback.
• Collaborate with product teams to align the commercial roadmap with customer needs.

• Hands-on experience in technical sales or customer success at a SaaS/devtool startup.
• Proficiency with CRM tools (e.g., Hub Spot, Salesforce) and sales automation.
• Strong technical aptitude; familiarity with LLM/observability tools is a plus.
• Willingness to work in-person ~4 days/week.

Bonus Points

• You’ve used Langfuse (sign up for a free account here) and understand our docs.
• Experience in selling in open-source or developer-focused products.
• Entrepreneurial mindset with a track record of building processes from scratch.
• Experience in navigating enterprise POCs with technical leadership as key decision makers.

• Selling to sophisticated technical users
• Competitive salary & equity compensation
• Strong customer & revenue growth
• You are joining really early
• Extreme autonomy
• Performance and learning focused culture
• Everyone on the team says: "best place I've ever worked at"
• 2 short scheduled meetings per week

You’ll join our early core team, working closely with the founders Clemens (COO, sales) and Marc (CEO, product/marketing). Clemens is based in SF and Marc in Berlin, Germany. We prioritize in-office collaboration and the role can be based out of either office.

Learn more about Langfuse through our Handbook

• Ben Kuhn on Impact, Agency and Taste
• How Posthog does sales
• Clay:
  The Rise of the GTM Engineer