English-speaking OpenAI API jobs in Berlin

Head of Data Science

Berlin

On-site Full-time Lead

8+ YOE 8+ years in data science or ML, including 3+ years managing data scientists or ML engineers. Experience taking ML products to production, solid LLM understanding, measurement and statistics skills, and strong technical depth, …

LLM, Google Cloud, Python, SQL, OpenAI API

Senior Data & AI Platform Engineer Remote (m/f/d)

Berlin

Remote Full-time Senior

6+ YOE 6+ years of data experience with hands-on production data engineering, deep Microsoft Fabric or Synapse/Databricks/Delta experience, expert SQL/T-SQL, production Python or PySpark, incremental ingestion patterns, semantic …

Azure, Databricks, Python, Spark, SQL, RAG

Senior AI Platform Engineer

Berlin

Full-time Senior

6+ YOE 6+ years of software engineering, with at least 2 years building production systems on top of LLMs or ML models. Strong backend skills in Python and/or C#/.NET, plus solid API and distributed systems design. Hands-on cloud …

LLM, Python, C#, Azure, OpenAI API, AKS

Senior Software Engineer / AI Enabler (m/f/d)

Berlin

Full-time Senior

5+ YOE Experience leveraging AI and Generative AI (GenAI) to enhance engineering productivity — including code generation, debugging, reviews, documentation, and decision support — with a proactive mindset toward adopting tools that …

PHP, Laravel, TypeScript, AWS, Azure, Google Cloud

Staff Engineer (m/f/d)

Berlin

Full-time Lead

8+ YOE At least 8 years of experience building and running software in production, including systems where errors cost real money Deep backend expertise at production scale in Java or a comparable language such as Kotlin, C# or Go, and …

Java, Kotlin, C#, Go, Spring Boot, Salesforce

Applied AI Engineer

Berlin

Hybrid Full-time

You are a seasoned software engineer with experience building and operating production applications. You are highly proficient in Python and/or Java and comfortable working across backend services, APIs, data, and application …

Python, Java, LLM, LangChain, LlamaIndex, RAG

Staff Engineer

Berlin

Hybrid Full-time Lead

8+ YOE At least 8 years of experience building and running software in production, including systems where errors cost real money. Deep backend expertise at production scale in Java or a comparable language such as Kotlin, C# or Go, and …

Java, Kotlin, C#, Go, Spring Boot, Salesforce

Applied Researcher - Scientific AI

Berlin

Full-time Visa sponsorship Relocation support

We are looking first for depth in RL, agents, or post-training systems and the ability to acquire the relevant scientific context. Prior work in autonomous research, ML for science, scientific computing, or reproducible …

Python, Datadog, OpenAI API, LangChain, Cloudflare, Databricks

Senior Product Engineer (Full Stack)

Berlin

Hybrid Full-time Senior

5+ YOE At least 5 years of experience building and running software in production, with real users and real consequences when it fails. Strong backend skills at production scale in Java or a comparable language such as Kotlin, C# or Go, …

Java, Kotlin, C#, Go, Spring Boot, PostgreSQL

Senior AI Engineer

Berlin

Hybrid Full-time Senior

Strong Python and backend engineering skills, with experience maintaining and evolving production systems. Hands-on experience shipping LLM applications and improving them after launch. Hands-on experience with all three: …

Python, LLM, SQL, OpenAI API, PostgreSQL, pgvector

Forward Deployed Engineer

Berlin

On-site Full-time Mid

3+ YOE We are looking for a software engineer who ships production software and is equally at home in a customer's meeting room. You may be a strong fit if you have: Relevant background: 3+ years as a software engineer shipping …

TypeScript, Node.js, React, PostgreSQL, LLM, Vite

Senior Full-Stack Product Engineer

Berlin

Remote Full-time Senior

LLM, Stripe, OpenAI API, Python, FastAPI, React

Product Engineer

Berlin

Remote Full-time

LLM, Stripe, OpenAI API, Python, FastAPI, React

Senior Software Engineer

Berlin

Remote Full-time Senior

LLM, Stripe, OpenAI API, Python, FastAPI, React

Founding AI Engineer @handly - 20VC backed

Berlin

On-site Full-time Mid

4+ YOE Have 4+ years of full-stack engineering experience (exceptions apply for exceptional engineers) You have shipped AI features that real users depend on, and continiously evloved them. Strong full-stack TypeScript comfortable …

TypeScript, LLM, Node.js, PostgreSQL, React, Vite

Senior Backend Engineer

Berlin

On-site Full-time Senior

5+ YOE 5+ years of backend, platform, infrastructure, or distributed systems engineering experience in a production environment. Deep hands-on TypeScript experience. We run TypeScript services on Bun, and we care about people who can …

TypeScript, Google Cloud, Kubernetes, RabbitMQ, Redis, PostgreSQL

Senior Software Engineer - AI Foundations

Berlin

Hybrid Full-time Senior

AI engineering: Pydantic AI, LiteLLM, LangChain, MCP servers Knowledge and retrieval: RAG, search, embeddings, knowledge graphs Evals and safety: Inspect AI, Ragas, OpenAI Evals, NeMo Guardrails, red teaming Platform: Kubernetes, …

LangChain, RAG, OpenAI API, Kubernetes, AWS, Django

Principal Software Engineer (TypeScript, Backend‑Heavy)

Berlin

On-site Full-time Lead

You’ve solved complex problems in production – e.g. scaling bottlenecks, reliability issues, tricky data/architecture trade-offs. Strong TypeScript + Node.js backend experience in larger codebases, with a focus on building and …

TypeScript, Node.js, PostgreSQL, Docker, Kubernetes, Azure

Senior DevOps Engineer

Berlin

On-site Full-time Senior

CI/CD, Infrastructure as Code, SRE, AWS, Google Cloud, Docker

Senior Product Engineer (f/m/d)

Berlin

On-site Full-time Senior

5+ YOE

TypeScript, Java, Python, CI/CD, OpenAI API

Senior AI Engineer (f/m/d)

Berlin

On-site Full-time Senior

5+ YOE Your Experience & Mindset You have 5+ years experience in Software Engineering and AI You've worked in early-stage startups or scale-ups where you had to wear multiple hats (coding, testing, UI, integrations) Hands-on experience …

LLM, OpenAI API, LangChain, REST, Python

Engineering Lead

Berlin

On-site Full-time Lead

8+ YOE Your Experience & Mindset 8 to 10+ years of professional experience in software engineering with a strong track record of building and shipping in startup or scaleup environments Experience across multiple companies and …

Java, JavaScript, React, Python, LLM, OpenAI API

Senior Data Scientist

Berlin

On-site Full-time Senior

Proven backend development skills in Python with experience building APIs, data pipelines, or ML infrastructure, and familiarity with tools like FastAPI, Docker, and cloud platforms (preferably GCP) Deep curiosity about how LLMs …

Python, FastAPI, Docker, Google Cloud, LLM, SQL

Product Engineer (m/f/d)

Berlin

Hybrid Full-time Mid

3+ YOE What we need from you Nobody at 11 people knows everything. We hire people who dive in and own outcomes. 3 to 6 years of full-stack experience shipping production software people actually use. You can get productive in our stack …

Kotlin, Python, TypeScript, Spring Boot, React, PostgreSQL

Staff Software Engineer - Product Integration (f/m/d)

Berlin

Full-time Lead

8+ YOE 8+ years of professional software engineering experience, with clear evidence of operating at a Staff level (cross-team technical impact, ownership of significant platform-level work, mentorship of senior engineers) Strong …

Java, Kotlin, Go, Node.js, Apache Kafka, Apache Flink

(Senior) Product Engineer - m/f/d

Berlin

On-site Full-time Senior

You have several years of experience, typically 3 to 6, building and shipping full-stack product software across TypeScript, React, Node.js, databases, and queues. You can explain what changed for users or the business because of …

TypeScript, React, Node.js, LLM, Next.js, Tailwind CSS

Senior Full Stack & AI Engineer (m/w/d)

Berlin

Hybrid Full-time Senior

3+ YOE 3–5+ years of experience in full-stack development (React, Node, TypeScript). Experience taking the technical lead on at least one major project. An entrepreneurial mindset, you enjoy turning ideas into working products. Comfort …

React, TypeScript, Tailwind CSS, CSS, Next.js, Vite

Model Research Engineer (m/f/d)

Berlin

Remote Full-time

Must-Haves: Deep expertise in Python and modern deep learning frameworks (e.g., NeMo, PyTorch, or similar). Proven hands-on experience working on high-performance, large-scale ML systems, particularly in the context of Language …

Python, PyTorch, Jira, OpenAI API, MLOps, R

Senior Software Engineer / AI Enabler (m/f/d)

Berlin

Full-time Senior

5+ YOE

Agile, Java, Spring Boot, Scala, PostgreSQL, DynamoDB

Engineering Intern

Berlin

On-site Internship Junior

Your mindset You’re the type of person who: Builds to learn and learns by building - you love turning ideas into working products and figuring things out along the way Thinks like a founder - you’re proactive, curious, and …

Flutter, Go, PostgreSQL, AWS, Kubernetes, LLM