120 frontend developer English-speaking jobs in Berlin

You will lead a team of up to 10 engineers (ML, backend, frontend, infra), while remaining deeply involved ... platform design Experience running ML systems in production Strong full‐stack understanding (backend + frontend ... Developer platform (APIs, SDKs, tooling, observability) Who We AreWe're Journee — The Human AI company ... We recently launched Ojin , our developer platform for building and scaling real‐time AI agents. ... Platform Lead API architecture and SDK strategy Improve developer onboarding and self‐serve capabilities

quality with reviews, tests, and pragmatic performance work Help evolve our architecture, tooling, and developer ... If you're strong on the frontend and comfortable going down-stack, we want to talk. ... You'll focus on the frontend while comfortably building APIs and shaping database models. ... experience Qualifications 4+ years engineering experience Strong product mindset and ownership Frontend

platform design Experience running ML systems in production Strong full-stack understanding (backend + frontend ... ) Experience working directly with founders Highly Valuable Experience Building developer platforms or ... What Success Looks Like (12 Months) Reduced latency and optimised inference costs Developer onboarding ... latency, cost and product quality across deployments Lead API architecture and SDK strategy Improve developer ... Build scalable abstractions for agent creation and deployment Stengthen observability, debugging, and developer

initiatives with Senior Engineers, Staff Engineer and Engineering Manager to improve architecture and developer ... Engineer - Web.General Information and RequirementsEmployment Type: PermanentExperience: 7+ years in Frontend ... forward — even when the path isn't obvious.Technical Skills Expert-level knowledge of React and frontend ... grow, share context, and take on broader ownershipYour Profile You've built and maintained complex frontend ... and multi-package codebases, including monorepos, using tooling like Webpack, npm scripts, and shared frontend

initiatives with Senior Engineers, Staff Engineer and Engineering Manager to improve architecture and developer ... TECHNICAL SKILLS Expert‐level knowledge of React and frontend architecture. ... YOUR PROFILEYou've and maintained complex frontend systems across web and desktop environments and ... GENERAL INFORMATION Employment Type: Permanent Previous working experience: 7+ years in Frontend or Full‐stack ... and multi‐package codebases, including monorepos, using tooling like Webpack, npm scripts, and shared frontend

and external integrations Improve performance, reliability, and developer experience across the stack ... Tasks Ship new backend features with Rails and PostgreSQL Design and maintain APIs that power our frontend

As a (senior) fullstack developer at DATATRONiQ, you will have the opportunity to work on a cutting-edge ... features using Typescript and Javascript (Node.js & Express in the backend, React & Storybook in the frontend ... week with a mix of hackathons and show and tell.Responsibilities Work in an agile environment to ship frontend

development expertise Strong architectural ability to design clean, scalable frontend systems Fluency ... architecture to polished, high-quality delivery Push the boundaries of what's possible with modern frontend ... and performance through thoughtful reviews, testing, and best practices Contribute to evolving our frontend ... DepartmentEngineering Compensation €100K – €150K • Offers Equity What you'll do Take ownership of complex frontend ... in fast-paced startup or high-growth environments Deep expertise in TypeScript , React , and modern frontend

Experience with GraphQL or frontend frameworks (React, Vue) is a plus. ... Drive meaningful improvements to system performance, reliability, or developer experience. ... Improve developer experience by championing better tooling, automation, and AI-augmented workflows. ... We use Python FastAPI in the backend, React/Next.js in the frontend, and Kubernetes for the infrastructure

Experience with GraphQL or frontend frameworks (React, Vue) is a plus. ... Drive meaningful improvements to system performance, reliability, or developer experience. ... Improve developer experience by championing better tooling, automation, and AI-augmented workflows. ... We use Python FastAPI in the backend, React/Next.js in the frontend, and Kubernetes for the infrastructure

What you'll do Take ownership of complex frontend features end-to-end - from scoping and architecture ... development expertise Strong architectural ability to design clean, scalable frontend systems Fluency ... to polished, high-quality delivery Push the boundaries of what's possible with modern frontend technologies ... and performance through thoughtful reviews, testing, and best practices Contribute to evolving our frontend ... track record of shipping high‐quality user‐facing products A strong portfolio or GitHub showcasing frontend

Tech StackWe run a TypeScript monorepo: Next.js on the frontend, Express workers for background jobs, ... You'll be responsible for their reliability, performance, and developer experience. ... Developer experience is a core differentiator for Langfuse and you'll own every detail of it. ... The SDK is often the very first thing a developer touches when they try Langfuse, so your work directly ... What we're looking for Strong engineer who gets excited about developer experience, API design, and

Deine Rolle About the RoleWe are looking for a skilled and detail-oriented frontend UI specialist (

strong.Our stack We run on GCP and use TypeScript almost everywhere, from backend services (NestJS) to our frontend ... We keep things simple where it counts, without compromising on scalability or developer experience.Build ... Lead projects that raise the bar across the company — from AI adoption and developer experience, to knowledge

for each challenge Engage with Storyblok's core tech stack—Ruby on Rails (backend) and Vue.js (frontend ... Python, React.js) as needed Evaluate emerging technologies (LLMs, vector databases, generative AI, new developer

Overview A technology company building AI-powered developer tools is hiring a Software Architect to lead ... is designed to power the next generation of software development by integrating AI-driven workflows, developer ... working in evolving technical environmentsNice to have Experience designing cloud-based platforms or developer

Accountabilities Build, mentor, and manage high-performing engineering teams across Backend, Frontend ... Strong hands-on backend experience (Node.js, Java, Go, Python, or similar) and understanding of modern frontend

Collaborate closely with frontend developers, AI engineers, QA engineers, product managers, and UX/UI

Experience with Frontend engineering, ideally with React You are passionate about learning new tools ... learn how to use cutting-edge technologies and tools including but not limited to: Component-based Frontend ... You 5+ years of software engineering experience, primarily backend development with Kotlin, with some frontend

Responsibilities Engineering Leadership: Lead and mentor distributed engineering teams across backend, frontend