Marc Klingen
CEO And Co-founder at ClickHouse
Berlin, Germany
Summary
🤩
Rockstar🎓
Top SchoolMarc Klingen is a CEO and co-founder with nine years of experience building developer-first AI infrastructure from Berlin, currently leading Langfuse—a YC-backed open-source LLM engineering platform now part of ClickHouse. He combines product instincts from consumer and enterprise roles with hands-on backend engineering, contributing core API, telemetry cron jobs, and pagination/filtering features to the Langfuse repo. Marc’s work sits at the intersection of observability, prompt management and model evaluation, helping engineering teams turn LLM outputs into actionable analytics. He holds advanced studies from TUM and CDTM and brings a rare mix of startup operator, investor-facing experience, and deep technical contribution to open-source LLM tooling.
9 years of coding experience
1 year of employment as a software developer
Semester Abroad, Semester Abroad at Tongji UniversitySemester Abroad, Semester Abroad at University of Michigan - Stephen M. Ross School of BusinessBachelor of Science - BS International Business Administration and Management, Bachelor of Science - BS International Business Administration and Management at WHU – Otto Beisheim School of ManagementMaster of Science - MS Management & Technology (Computer Science and Innovation), Master of Science - MS Management & Technology (Computer Science and Innovation) at Technical University of MunichHonours Degree Technology Management, Honours Degree Technology Management at Center for Digital Technology and Management (CDTM)YC W23, YC W23 at Y Combinator
German, English
Stackoverflow
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Github Skills (8)
typescript10
nodejs10
typescripts10
api10
backend10
apidoc10
typescript-types10
javascript9
Programming languages (17)
Github contributions (5)
langfuse/langfuse
May 2023 - Jul 2026
🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and more. 🍊YC W23
Role in this project:
Back-end Developer
Back-end DeveloperContributions:163 releases, 412 reviews, 2064 PRs in 3 years 1 month
Contributions summary:Marc made contributions focused on developing and enhancing the back-end infrastructure of the Langfuse project. They implemented features to filter and paginate generations. They addressed code quality issues through prettier fixes and made improvements to the cron jobs for telemetry, demonstrating skills in API development, database interactions, and potentially task scheduling. Moreover, the user contributed to improvements in the API and backend functionality by integrating the changes in the models of the API response.
ailangchainllmobservabilityopenai
langfuse/langfuse-docs
May 2023 - Jul 2026
🪢 Langfuse documentation -- Langfuse is the open source LLM Engineering Platform. Observability, evals, prompt management, playground and metrics to debug and improve LLM apps
Contributions:133 reviews, 1142 PRs, 4548 pushes in 3 years 2 months
llmobservabilitygenailangfuselarge-language-models
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