Software Engineer at Langdock (S23) €80K - €156K EUR The all-in-one AI platform for companies. Berlin, BE, DE Full-time US citizenship/visa not required 1+ years About Langdock We help organizations to drive internal AI adoption. We are the enterprise-ready platform to roll out AI internally and enable your developers to build and deploy custom AI workflows. Our product suite covers AI Chat, Assistants, Search, API, and Agents. We serve customers like Merck KGaA, Der Spiegel, GetYourGuide, Babbel, and Personio. About the role Skills: Next.js, Node.js, Redis, TypeScript, PostgreSQL About the Role We're seeking a highly skilled and proactive Software Engineer to join our team full-time and in person. This is a fantastic opportunity for someone eager to develop features end-to-end and make a substantial impact in a fast-paced, early-stage startup environment. In this role, you will build product features from conception to deployment, collaborating closely with our CPO and working across the entire tech stack to deliver AI-powered features that drive enterprise adoption. We are hiring for an on-site role in our HQ in Berlin, Germany. Responsibilities Design and implement robust backend systems and APIs to power our AI platform Build end-to-end solutions spanning backend (Node.js), database layers, and frontend integration Develop and optimize database schemas, queries, and data models for performance and scalability Implement API endpoints and integrate with third-party services and AI providers Collaborate with the team on technical architecture decisions and system design Maintain and optimize our codebase for performance, reliability, and maintainability Take over "Support Engineer" rotations, in which all members from the engineering team regularly shift their focus on supporting our customers and the customer support team Required Skills 2–3+ years of proven experience in a software engineering role, building production applications Strong backend development experience with Node.js, API design, and system architecture Solid experience working with databases, particularly PostgreSQL, including data modeling and query optimization API integration experience with REST APIs and modern patterns like tRPC Comfortable with frontend technologies (JavaScript/TypeScript, React/Next.js) to build full-stack features when needed Fluent English communication skills for technical discussions and collaboration within the team Candidates with a stronger background in either frontend or backend are welcome, but you should be comfortable working across the full stack. Strong Plus Hands-on experience with Language Models and AI/ML integrations (OpenAI, Anthropic, Google, etc.) Enterprise software development experience with security and compliance considerations Experience with Redis for caching and session management Vector databases and semantic search implementation German language skills for direct customer communication A strong sense for user experience (UX) and experience working with design systems Timeline After Start Weeks 1-2: Onboarding and small tickets to familiarize with codebase Weeks 3-6: Mix of smaller and mid-size tickets as well as being "support engineer" (on duty for a week, together with more experienced engineer to handle and fix all ad-hoc, incoming issues from customers) Week 6+: Work as a Product Engineer, working on building full screens and features end-to-end in our product. While working with our design team and customers to get insights, feedback, etc. About Langdock We help organizations drive internal AI adoption through our enterprise-ready AI platform. Our product suite includes AI Chat, Assistants, Search, API, and Workflows - enabling companies to roll out AI internally and build out custom AI use-cases. We serve over 800 customers, from DAX companies to small startups, including enterprise clients like Merck KGaA, Der Spiegel, GetYourGuide, Babbel, and Personio. Millions of prompts are sent every week through our platform, providing secure, scalable AI solutions that integrate seamlessly with existing workflows. Tech Stack: Next.js, TypeScript, Node.js, PostgreSQL, Redis, Prisma, tRPC, Tailwind CSS