Senior Software Engineer (m/w/d)

These tasks are waiting for you

You'll be a core contributor to the Admin Experience team.

• 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 — your initiative is welcome, not just tolerated We operate in a regulated environment (BaFin, DORA, EU compliance), so thoughtfulness about security and data integrity — including when AI is in the loop — is part of the job.

This is what you bring to the table

You don't need to tick every box. If this sounds like your kind of work, we want to hear from you.

• 5+ years as a Software Engineer — we care about the quality of your experience, not just the length
• 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) — you've built something real with them, not just experimented
• 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 how to test non-deterministic AI components
• Experience in fintech, insurtech, payments, or banking integrations — or genuine curiosity to learn the domain
• Clear communicator who can hold a technical discussion and a product conversation in the same meeting Fluent in English — German or other languages are a plus

What we offer

Together with our investor, AXA, we offer a combination of entrepreneurial freedom, leading technological know-how, reliability and extensive experience in the conception and management of insurance solutions that is rather unusual for the insurance industry.

When you become part of our team, you can expect to work with incredibly versatile and talented colleagues.

• The opportunity to lead and grow an exciting team
• The opportunity to shape the future of insurance by contributing to the strategy and success of Alteos and further advancing one of the worlds leading core insurance systems
• Modern working in the middle of Berlin's City-West, with a wide range of perks and benefits. To name a few: 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 your colleagues outside of daily work, e.g.through team events, weekly yoga classes, team runs and more
• A flexible work model (hybrid working role)

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Position Details

• Job Title: Senior Software Engineer (m/w/d)
• Company / Organisation: Alteos GmbH
• Location: Berlin
• Employment Type: Full-time
• Field / Industry: Software Development
• Work Arrangement: On-site or hybrid — Berlin

About This Opportunity

This full-time opportunity at Alteos GmbH is an excellent opening for experienced professionals in the field of software engineering and technology. The role is structured around an on-site or hybrid environment based in Berlin and is designed for candidates who are ready to make a meaningful contribution from the moment they join.

Based in Berlin, this role offers the opportunity to collaborate closely with a local team in a structured professional environment. Candidates currently based in the area or open to relocation are strongly encouraged to apply.

Whether you are an established practitioner in software engineering and technology or a highly skilled professional looking for your next challenge, this Senior Software Engineer (m/w/d) role offers the platform to apply your expertise in a real-world, results-oriented environment. Alteos GmbH is looking for a candidate who can hit the ground running and add genuine value to the team.

Who Should Apply

This role is ideal for candidates who have a solid background in software engineering and technology and a demonstrable track record of delivering high-quality results. You should possess analytical thinking, attention to technical detail, and a methodical approach to problem-solving. Experience working with modern development tools, version control systems, and cloud platforms will be an advantage, though a commitment to continuous learning and professional development is equally valued.

Beyond technical or domain expertise, Alteos GmbH is looking for someone who communicates clearly, collaborates effectively with colleagues and stakeholders, and takes ownership of their work from start to finish. If you thrive in a professional environment and are passionate about the opportunity to build reliable, scalable, and high-performing digital products, we encourage you to apply.

Key Competencies for This Role

Successful candidates for the Senior Software Engineer (m/w/d) position at Alteos GmbH will typically demonstrate the following core competencies:

• Domain expertise — a strong foundation of knowledge and hands-on experience in software engineering and technology
• Problem-solving ability — the capacity to identify challenges, think critically, and implement practical solutions efficiently
• Communication skills — clear and professional communication with colleagues, stakeholders, and partners at all levels
• Self-management — strong time management and the ability to prioritise a varied workload while meeting deadlines
• Team collaboration — a collaborative and supportive approach to working alongside colleagues across departments or locations
• Adaptability — the ability to respond positively to change and thrive in a dynamic, evolving work environment

How to Apply

To apply for this Senior Software Engineer (m/w/d) position at Alteos GmbH, click the "Apply Now" button on this page. You will be taken directly to the official application page where you can complete and submit your application.

Before applying, please ensure that your CV or résumé is fully up to date and clearly highlights your experience and accomplishments in software engineering and technology. If a cover letter is included or requested, tailor it specifically to this role and explain how your background, skills, and goals align with what Alteos GmbH is looking for in a Senior Software Engineer (m/w/d).

All applications for this role are processed directly by Alteos GmbH. Career Nest facilitates the job discovery process and does not pre-screen or forward applications on behalf of employers. There are no fees for job seekers at any stage of the application process.

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