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LangfuseLA

Senior Software Engineer (SDK)

Langfuse is an open-source LLM engineering platform that helps teams collaboratively develop, monitor, evaluate, and debug AI applications.

Langfuse

Employee count: 11-50

FR, DE + 2 more

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We're building the 'Datadog' of AI applications, and we're looking for a Senior Software Engineer to lead our SDK engineering efforts. As a key member of our team, you'll have a significant impact on the developer experience, API design, and reliability of our SDKs.

Requirements

  • Strong engineer who gets excited about developer experience, API design, and writing code that runs reliably in other people's production systems
  • Experience building or maintaining SDKs, client libraries, or developer tools
  • Deep understanding of performance: ability to profile, benchmark, and minimize CPU/memory overhead in hot paths
  • Thoughtful about versioning, backwards compatibility, and migration paths

Benefits

  • Generous Paid Time Off
  • 401k Matching
  • Tuition Reimbursement
  • Relocation Assistance

About the job

Apply before

Posted on

Job type

Full Time

Experience level

Senior

Location requirements

Hiring timezones

Germany +/- 0 hours, and 3 other timezones

About Langfuse

Learn more about Langfuse and their company culture.

View company profile

Through groundbreaking technology, we are revolutionizing LLM engineering at Langfuse. As an open-source platform, we empower teams to collaboratively develop, monitor, evaluate, and debug AI applications with unprecedented precision. Our comprehensive suite of tools includes observability, prompt management, and advanced analytics, enabling developers to trace complex execution flows and optimize model performance. By providing deep insights into cost, latency, and quality, we help organizations build production-grade AI systems that are both reliable and scalable.

Founded in 2022 and headquartered in Berlin, Germany, Langfuse has rapidly become a critical component of the modern AI stack. Our platform integrates seamlessly with leading frameworks such as LangChain, LlamaIndex, and OpenAI, offering a flexible and robust solution for diverse engineering needs. In a significant milestone for our growth and technological advancement, Langfuse was acquired by ClickHouse in January 2026. This strategic union combines our expertise in LLM observability with ClickHouse's powerful data analytics capabilities, allowing us to deliver even faster and more scalable solutions to our global community of developers.

Employee benefits

Learn about the employee benefits and perks provided at Langfuse.

View benefits

Expense Autonomy

Freedom to expense necessary work items without bureaucratic hurdles.

Late Night Meals

Dinner is covered by the company for employees who choose to work late.

Equity Program

Significant equity compensation with a generous 10-year exercise window.

Company Retreats

Annual one-week company retreat to a beautiful location for the entire team.

View Langfuse's employee benefits
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Langfuse

Company size

11-50 employees

Founded in

2022

Chief executive officer

Marc Klingen

Employees live in

View company profile

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Langfuse hiring Senior Software Engineer (SDK) • Remote (Work from Home) | Himalayas