Aktuelle Jobs im Zusammenhang mit Senior Backend Developer - Berlin - B2C Fintech
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Senior Backend Developer
Vor 4 Tagen
Berlin, Berlin, Deutschland Bling Vollzeit 80.000 € - 120.000 € pro JahrYour MissionAs a Senior Backend Developer, your mission is to design, build, and continuously improve Bling's backend infrastructure to ensure it is robust, scalable, and future-ready. You will take ownership of driving technical excellence across our systems, enabling our product to evolve smoothly as we grow. By optimizing performance, ensuring...
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SENIOR CONSULTANT: BACKEND DEVELOPER
Vor 7 Tagen
Berlin, Deutschland Data Reply VollzeitAls Senior Backend Developer Big Data leitest du bei uns im Team führende Backend-Entwicklungsinitiativen und bietest dein Expertenwissen an, um robuste Backendsysteme für unsere Kunden:innen zu entwerfen und zu implementieren.Technische Führung: Bei uns im Team führst und betreust du ein Team von Backend-Entwicklern und bist verantwortlich für...
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Senior Backend Developer
vor 2 Wochen
Berlin, Deutschland Hommelhired VollzeitSenior Backend Developer & Architecture Engineer (m/w/d) – Gestalte die Zukunft! 🚀 Bist du bereit, die digitale Welt mitzugestalten? Als Senior Backend Developer & Architecture Engineer erwarten dich spannende Projekte und innovative Herausforderungen. Profitiere von flexiblen Arbeitszeiten und der Möglichkeit, remote zu arbeiten. Werde Teil unseres...
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Senior-Backend-Developer (m/w/d)
Vor 5 Tagen
Berlin, Deutschland Autohaus Royal GmbH VollzeitSenior-Backend-Developer (m/w/d)Wir suchen Dich. Werde Teil unserer Expansion - Starte zum nächstmöglichen Zeitpunkt als Senior-Backend-Developer (m/w/d)Wer sind wir?einer der größten, markenunabhängigen Anbieter in Deutschlandca. 1.500 Premiumfahrzeuge im Bestandseit über 25 Jahren am Marktkurze Entscheidungswege, da Inhabergeführtmoderne und...
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Senior Backend Developer
vor 1 Woche
Berlin, Deutschland senvo VollzeitSenvo is a young start-up working on changing the face of last mile logistics. We enable logistics companies, e-commerce providers and producers to ship goods more effectively and efficiently. We are a tight-knit team of highly driven and smart people who are supportive of each other, passionate about technology, and compassionate with our users. The...
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Senior Backend Developer
vor 3 Wochen
Berlin, Deutschland senvo VollzeitSenvo is a young start-up working on changing the face of last mile logistics. We enable logistics companies, e-commerce providers and producers to ship goods more effectively and efficiently. We are a tight-knit team of highly driven and smart people who are supportive of each other, passionate about technology, and compassionate with our users. The...
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Senior Backend Developer
Vor 7 Tagen
Berlin, Deutschland proSenio GmbH VollzeitSenior Backend Developer (m/w/d) bei proSenio GmbH | softgarden View job here Senior Backend Developer (m/w/d) Vollzeit Hybrid Berlin, Deutschland Mit Berufserfahrung 02.12.25 EUR 60000,00 - 75000,00 Die proSenio GmbH betreibt Deutschlands führenden Service für die häusliche Versorgung mit Pflegehilfsmitteln. Dabei ist es unser oberstes Ziel, die Menschen...
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Senior Backend Developer
vor 2 Wochen
Berlin, Berlin, Deutschland senvo Vollzeit 90.000 € - 120.000 € pro JahrSenvo is a young start-up working on changing the face of last mile logistics. We enable logistics companies, e-commerce providers and producers to ship goods more effectively and efficiently. We are a tight-knit team of highly driven and smart people who are supportive of each other, passionate about technology, and compassionate with our users.The...
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Senior Backend Developer
vor 2 Wochen
Berlin, Berlin, Deutschland senvo Vollzeit 60.000 € - 120.000 € pro JahrSenvo is a young start-up working on changing the face of last mile logistics. We enable logistics companies, e-commerce providers and producers to ship goods more effectively and efficiently. We are a tight-knit team of highly driven and smart people who are supportive of each other, passionate about technology, and compassionate with our users.The...
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Backend Developer
vor 1 Woche
Berlin, Berlin, Deutschland NeuroNation Vollzeit 80.000 € - 120.000 € pro JahrAbout usNeuroNation is a leading brain training platform empowering more than 30 million people worldwide to stay cognitively fit, independent, and mentally strong. We collaborate closely with scientists, universities, clinics, and research organizations to develop engaging, evidence-based digital health solutions.Our products, including the medical device...
Senior Backend Developer
vor 4 Wochen
Company We are a Berlin-based B2C fintech operating in stealth, founded by two repeat founders (YC alum, exit) with prior 10+ year careers in investment banking and strategy consulting, respectively. We recently raised investment to assemble a 15 people, exceptionally strong core team. Our culture is built on ownership and clarity. We align with you on vision, then set KPIs and required resources together—and then trust your drive and expertise. The Opportunity As a Senior Backend Developer / AI Engineer, you will work alongside our CTO on building and evolving our AI-powered fintech product. The core architecture is in place, providing a solid foundation to build upon as we integrate advanced LLM capabilities, establish AI pipelines, implement intelligent automation, and ship production-ready AI features. You'll be instrumental in shaping how we leverage AI to transform financial services, with significant autonomy to design and implement cutting-edge solutions. Tasks What you will work on on daily basis Designing and implementing LLM-powered features and intelligent automation workflows Building robust AI pipelines with proper orchestration, error handling, and monitoring Developing RAG (Retrieval-Augmented Generation) systems for financial data processing Implementing and optimizing vector search and embedding strategies Creating evaluation frameworks for LLM outputs and maintaining quality standards Building prompt management systems and optimizing LLM interactions for cost and performance Integrating multiple AI models and managing model versioning/deployment Ensuring AI safety, reliability, and compliance in financial applications Requirements Hard Requirements LLM Framework Expertise: Deep hands-on experience with LangChain.js, LangGraph for JavaScript, or similar Node.js-based LLM frameworks. You understand agent architectures, chain composition, memory management, and can build complex multi-step AI workflows in TypeScript/JavaScript. Workflow Orchestration: Production experience with Temporal .io (TypeScript SDK), Bull/BullMQ, or similar Node.js-compatible orchestration solutions. You know how to build reliable, long-running workflows with proper error handling, retries, and state management. Vector Database & RAG Systems: Proven experience implementing RAG architectures using vector databases (Pinecone, Weaviate, Qdrant, or pgvector) with Node.js clients. You understand embedding models, similarity search, and hybrid retrieval strategies. Node.js & TypeScript Mastery: Expert-level proficiency in Node.js and TypeScript with extensive experience integrating AI services (OpenAI, Anthropic, Cohere APIs). You're comfortable with streams, async patterns, WebSockets for real-time AI responses, and optimizing for latency. Additional Technical Skills Experience with prompt engineering and prompt management systems accessible from Node.js Hands-on experience with AI model APIs and their Node.js SDKs (OpenAI, Anthropic, Hugging Face, Replicate) Knowledge of AI observability tools with Node.js integration (LangSmith, Helicone, or custom solutions) Proficiency with streaming architectures and Server-Sent Events (SSE) for real-time AI responses Understanding of AI safety, hallucination detection, and output validation techniques Familiarity with AI evaluation frameworks and automated testing of LLM outputs Mindset & Approach AI-Native Thinking: You think in terms of probabilistic systems, understand LLM limitations, and know how to design robust systems around non-deterministic outputs. Pragmatic Innovation: You balance cutting-edge AI capabilities with production requirements—knowing when to use simple solutions vs. complex AI architectures. Ownership Mentality: You're proactive, resourceful, and accountable for your work—you don't wait to be told what to do. Team Player: You collaborate well with others, can explain AI concepts to non-technical stakeholders, and elevate those around you. Quality-Focused: You understand the importance of evaluation, testing, and monitoring in AI systems and build with observability in mind. Continuous Learner: You stay current with the rapidly evolving AI landscape, experiment with new models and techniques, and are energized by pushing the boundaries of what's possible. Benefits Compensation & How We Work Competitive salary commensurate with experience (€80k-€110k+ depending on seniority) On-site in Berlin-Mitte, with flexible remote work as you see fit (typically 3-4 days in office, flexible on specific days) High autonomy, low politics, fast decision-making—we value impact over process Top-tier equipment—whatever tools you need to do your best work We're an equal opportunity employer. We value diversity and are committed to creating an inclusive environment for all employees. If you're excited about the role but don't meet 100% of the criteria, we'd still love to hear from you—particularly if you bring unique perspectives or experiences that would strengthen our team.
