Senior Software Engineer (m/w/d)

Alteos is seeking a Senior Software Engineer to contribute to the Admin Experience team, designing and developing features across a TypeScript/Node.js backend and React frontend, while also building AI-powered features and working with modern infrastructure in a regulated insurance environment.

• Design and develop secure, well-tested features across a TypeScript/Node.js backend and React frontend
• Contribute to our API-first infrastructure — the engine behind how partners integrate insurance into their products
• Build AI-powered features using Claude and Gemini — from intelligent claims automation to LLM-assisted OPS tooling we run in production today
• Design and implement agentic workflows — multi-step, LLM-orchestrated processes that replace manual ops tasks across claims, support, and partner onboarding
• Work across the full stack with PostgreSQL, Redis, DocumentDB, Kafka, and AWS
• Collaborate closely with Product, Platform Engineering, Finance, and Operations to turn business requirements into reliable, maintainable solutions
• Drive technical improvements in quality, performance, and security

• 5+ years as a Software Engineer — quality of experience matters
• Very strong command of TypeScript / JavaScript and Node.js; familiarity with React is a plus
• Hands-on experience with LLM APIs (Anthropic, OpenAI, Google, or similar) — built something real with them
• Familiarity with AI-native development patterns: prompt engineering, RAG pipelines, tool/function calling, agentic orchestration, or MCP
• Comfort reasoning about AI reliability and risk in production — output validation, fallback strategies, observability of LLM-driven flows
• Hands-on experience with databases like PostgreSQL, Redis, or DocumentDB; event-driven systems (Kafka or similar) are a bonus
• Comfort working in AWS environments with Docker and CI/CD pipelines
• Solid understanding of DDD, SOLID principles, and modern system design
• Experience writing unit, integration, and contract tests — including testing non-deterministic AI components
• Experience in fintech, insurtech, payments, or banking integrations — or genuine curiosity to learn the domain
• Clear communicator who can hold both technical and product conversations
• Fluent in English

• Together with our investor, AXA, we offer entrepreneurial freedom, leading technological know-how, reliability and extensive experience in the insurance industry
• Work with incredibly versatile and talented colleagues
• The opportunity to lead and grow an exciting team
• Opportunity to shape the future of insurance by contributing to the strategy and success of Alteos and advancing one of the worlds leading core insurance systems
• Modern working in Berlin's City-West with perks: subsidized lunch & one free lunch a week, discount on BVG ticket, company (e-)bike leasing, urban sports club, mental well-being app
• Many opportunities to connect with colleagues: team events, weekly yoga classes, team runs and more
• A flexible work model (hybrid working role)