636 English-speaking jobs in Berlin

Senior Software Engineer (SDK) will own and improve Python and TypeScript SDKs, ensuring reliability, performance, and developer experience. Responsibilities include designing APIs, integrating with AI frameworks, and maintaining OpenTelemetry endpoints. Experience with SDKs, client libraries, and performance optimization is required.

Senior Product Engineer (Integrations) will build and maintain framework integrations for Langfuse, an open-source LLM engineering platform. Responsibilities include designing integration patterns, contributing to SDKs, writing documentation, and engaging with the developer community. Strong Python and/or TypeScript skills, a passion for the LLM ecosystem, and experience with open source are required.

Own and scale the infrastructure behind the most widely adopted open source LLM engineering platform. Process terabytes of AI tracing data per day for thousands of AI teams. Optimize ClickHouse data models and queries for fast dashboards and build backend abstractions for data-heavy features.

Senior Product Engineer (Growth) will drive Langfuse's growth by understanding user behavior, building data pipelines, and iterating on product features to improve onboarding, activation, and adoption. Responsibilities include experimenting with new growth loops, collaborating with engineers and designers, and analyzing user data to identify opportunities for improvement. Must-haves include a drive to learn, experience in full-stack development, SQL skills, and the ability to think like a user.

Senior Backend Engineer will design and build authentication, authorization, and billing systems for a platform used by Fortune 50 companies. Responsibilities include managing user access, implementing fine-grained permissions, and developing usage-based billing infrastructure.

Senior Product Engineers at Langfuse build and ship user-facing features end-to-end for an open-source LLM engineering platform. Responsibilities include understanding user problems, designing solutions, writing code and documentation, and presenting features to the community. Experience building products, managing projects, and a passion for developer experience are required.

Pizzaiolo (m/f/d) needed for a new project in Berlin. Prepare pizza, manage a station, and ensure high-quality food standards. Prior pizza experience and a passion for culinary arts are required. English skills are essential.

Postdoctoral Researcher will plan, set up, and commission an inert sample transfer system for high-throughput synthesis and analysis. Responsibilities include developing automated data processing, executing combinatorial material screening, and presenting research results.

Part-time Barista needed for new café in Berlin-Schöneberg. Responsibilities include barista service, sales, catering coordination, and café operations. Must have experience in a similar environment and be comfortable communicating in German or English.

Support the daily operations of a new café serving coffee, breakfast, lunch, and concierge services. Responsibilities include barista service, sales, catering coordination, and communication with suppliers.

Lead our Supply engineering team, shaping the roadmap and ensuring predictable, high-quality delivery. Guide system design, review code, and contribute to operational excellence. Hire and onboard engineers, collaborate with stakeholders, and drive the supply side of the marketplace.

Lead and mature Zenjob's data and analytics function, integrating AI into daily workflows and optimizing the platform. Manage the data roadmap, prioritize high-impact initiatives, and collaborate with stakeholders to build a reliable data ecosystem.

Lead and mature Zenjob's data and analytics function, integrating AI into daily workflows and optimizing the platform. Manage the roadmap for data initiatives, ensuring measurable value for the company. Collaborate with data, engineering, and business stakeholders to build a reliable data ecosystem.

Lead the Supply engineering team, shaping the roadmap and ensuring predictable, high-quality delivery. Guide system design, review code, and contribute to continuous improvement. Hire and onboard engineers, collaborate with stakeholders, and advocate for AI-driven engineering practices. Several years of experience leading software engineers in a product-led B2C or marketplace environment is required.

Investigate quantum materials with a focus on quantum and topological magnets. Synthesize materials, measure properties, perform scattering experiments, and analyze data.

Postdoctoral researcher to investigate emergent states and properties of quantum and topological magnets through experimental measurements, data analysis, and numerical simulations.

Junior Copywriter (m/f/x) needed to create engaging copy for campaigns, editorials, newsletters, product descriptions, and social media. Must have a degree in English language and/or literature, journalism, or a comparable qualification and relevant professional experience.

Provide sales and customer service support in makeup, skincare, hair care, and fragrance departments. Share product knowledge, trends, and beauty news. Conduct beauty classes and maintain product presentation. Possess at least 3 years of experience in a relevant department and excellent communication skills.

Beauty Advisor needed for full-time or part-time position at Sephora Berlin Alexanderplatz. Responsibilities include customer service, product knowledge, visual merchandising, stock management, and operational tasks. Experience in retail, beauty, or a related field is preferred.

Design and build software products with a focus on user experience. Responsibilities include redesigning a mobile web application, developing components, and collaborating with cross-functional teams.