java backend engineer senior Jobs in Berlin

EngRadar / Clera Software Engineer, Foundation **Clera** A well-funded, early-stage B2B SaaS startup building self-improving conversational agents that run product demos 24/7. **Clera** is the employer — EngRadar is a job radar, not a recruiter. We track this posting from their own careers page and send you straight there; we never handle...

Product Engineer (Full Stack) @Kombo 📍 Berlin (On-site) - Full-time Hey, I'm Aike, co-founder & CTO at Kombo. I'm looking for entrepreneurial product engineers who want to own entire customer problems on our product. You won't get specced tickets at Kombo, but talk to customers, design the solution, build it, ship it, and make sure it...

Do you want to work at the intersection of cutting-edge technology and workplace safety, ensuring every employee returns home safely every day? Join Buddywise!About BuddywiseWe’re building a safety intelligence platform to prevent workplace accidents before they happen. Backed by highly respected industry leaders and VCs, our AI-powered system helps...

**About Bolt** Bolt is shaping a future where cities are built for people, not cars. What started as an ambitious project of a 19-year-old in 2013 has grown into a global mobility platform used by more than 200 million customers and 4.5 million driver and courier partners across 50 countries. From ride-hailing and food delivery to scooters, e-bikes,...

A little about usAI-native design: Kittl is becoming the AI-native, operating system for creative businesses. We give small brands the creative firepower to look credible and get from idea to launch-ready, with no agency and no design teamRapid growth: 11 million users since 2022Diverse team: 120+ people from 30+ countries, with offices in Berlin and...

The Localization team builds and owns the systems that make sure every merchant, in every one of our 38 markets, can understand and use our products in their own language. It's one of the most critical enablers of SumUp's global growth, sitting at the heart of how fast and how well we can go to market anywhere in the world. As our Senior Full Stack...

Company DescriptionAbout Redcare Pharmacy:As Europe’s No.1 e-pharmacy Redcare Pharmacy is powered by passionate teams and cutting-edge innovation. We strive to create a healthy collaborative work environment where every employee feels valued and inspired to contribute to our vision “Until every human has their health”. If you’re seeking a career that...

Frustrated by how discourse is so broken on social media that it seems to make us dumber instead of smarter? Build the world's first Debate Prediction Game with us. Together we'll make discourse fun and beneficial for millions of people and supercharge the collective intelligence of humans and AIs. Contro is a VC-backed startup leveraging fair markets to...

We are Onfy - a German pharmacy marketplace founded in 2021. We are on a mission to constantly find new and innovative ways to support your health online. We empower our customers to take their health into their own hands by providing an easy, convenient and affordable experience. Our website www.onfy.de launched in November 2021, and since then it has...

Du bist interessiert an der Stelle als Senior Developer & Consultant - CIAM (m/w/d) bei **amiconsult GmbH** ? Auf Instaffo kannst du dich für diesen und weitere Jobs ohne großen Aufwand bewerben. Erstelle dein Profil in unter 2 Minuten und starte den Bewerbungsprozess mit nur wenigen Klicks. **Anforderungen** Bitte beachte, dass für diese...

Perplexity is looking for an Infrastructure Engineer to own and improve the backend systems behind our latency-sensitive search stack. You’ll work across high-QPS Rust and Go services, distributed retrieval systems, cloud infrastructure, observability, and deployment tooling. This role combines infrastructure expertise with software engineering....

Wir suchen Senior Java Software Engineer / Backend Developer – Railway (m/w/d) in Berlin Senior Java Software Engineer / Backend Developer – Railway (m/w/d) ArbeitsortBerlin ArbeitszeitVollzeit Vertragunbefristet Beginn2026-09-10 Vergütung Projektstart: November 2026Projektende: Mai 2028 AufgabenbeschreibungEntwurf und Implementierung von...

Wir sind Dampsoft: Innovativ, familiär, norddeutsch!Unsere Athena-App ist die Lösung für einen digitalen Workflow in der Zahnarztpraxis. Mit der Athena-App bieten wir papierlose Prozesse und eine moderne, verständlichere Patientenaufklärung mittels iPad. Als Startup im Familienunternehmen verbinden wir in unserem Berliner Office das Beste aus zwei...

**About Nebius** Nebius is leading a new era in cloud infrastructure for the global AI economy. We are building a full-stack AI cloud platform that supports developers and enterprises from data and model training through to production deployment, without the cost and complexity of building large in-house AI/ML infrastructure. Built by engineers, for...

THE ROLE & THE TEAMZalando Marketing Services (ZMS) stands for a new era of marketing in fashion e-commerce. We enable fashion, beauty, and lifestyle partners to engage with +60 million active customers across European markets on Zalando and beyond, providing access to exclusive audiences and smart marketing tools. We are ambitious and committed to being the...

**Your Impact** We are looking for a **Senior Site Reliability Engineer** to join the **Core Reliability & Observability** team in **Platform Engineering** .Your mission will be to shape Doctolib's observability strategy and ensure our platform remains reliable, debuggable, and scalable at a European scale. You will work in a feature team developing logging,...

- We are hiring a backend-leaning Tech Lead to lead a team of 3-4 engineers and own the tech for a part of Superchat’s product - This is a hands-on leadership role: You’ll spend roughly half your time designing and building software and the other half enabling your team to perform at its best. Work directly on architecture, development and important...

We’re working with a fast-growing AI company looking for a Senior FastAPI / Python Engineer to take ownership of the backend powering its AI products. You’ll build the APIs, data pipelines and orchestration layer connecting the product with LLMs, working across retrieval, tool-calling, response streaming and long-running background jobs. This is far...

We’re working with a fast-growing AI company looking for a Senior Retrieval / RAG Engineer to take ownership of the retrieval layer at the heart of its production AI platform. You’ll own everything from document ingestion, chunking and embeddings through to hybrid search, reranking, evaluation and agentic retrieval. This is a highly hands-on role where...

We’re working with a fast-growing AI company looking for a Senior Fullstack Engineer to build production AI features end to end. You’ll work across React & TypeScript on the frontend and Python & FastAPI on the backend, taking features all the way from idea through to production. Expect to work on everything from APIs, data and LLM integrations through...