On behalf of our client – a dynamic and fast-growing cybersecurity tech startup with approx. 50 employees – we are looking for a Senior Fullstack Developer (m/f/d) to join their agile product development team.

The company develops modern, cloud-native cybersecurity solutions that help businesses protect their digital infrastructure and remain secure in an increasingly complex threat landscape. You’ll be part of a highly motivated and collaborative environment with real impact on product architecture and direction.

• End-to-End Development: Design and build new features for a cloud-based security platform using modern technologies like React, Node.js, and Python or Java.
• Architecture & Innovation: Contribute to architectural decisions and implement scalable, secure, and maintainable solutions.
• API & Data Layer: Develop and integrate REST and GraphQL APIs, and work with both SQL and NoSQL databases.
• Quality Engineering: Ensure high code quality through automated testing, code reviews, and best practices in CI/CD pipelines.
• Security & Performance: Build with a security-first mindset, optimizing applications for performance, scalability, and reliability.
• Cross-functional Collaboration: Work closely with product managers, designers, and fellow engineers in a fast-paced, agile team setup.
• Continuous Improvement: Identify and drive opportunities to improve development processes, tooling, and team practices.

• Fullstack Experience: Strong background in frontend development (React, TypeScript) combined with solid backend experience in Node.js, Python, or Java.
• Cloud & Serverless: Practical experience with AWS, GCP or Azure, and understanding of serverless patterns and event-driven architectures.
• IaC & DevOps: Familiarity with Infrastructure-as-Code (e.g. Terraform) and CI/CD tools.
• API & Database Expertise: Confident working with modern APIs and both relational and non-relational databases.
• Security Know-how: Experience with secure authentication methods (OAuth, JWT) and general cloud security best practices.
• Agile Mindset: Proactive, self-organized team player with strong communication skills and a passion for clean, maintainable code.
• Language Skills: Fluent in English (written and spoken); German is a plus.

• Competitive Salary Package
• Flexible Working Hours & Hybrid Setup
• Close Collaboration with the CTO – Direct influence on tech decisions and architecture
• Personal Growth Opportunities – Supported through feedback, learning budgets and career paths
• Startup Spirit with Purpose – Work on something meaningful in a mission-driven team
• Flat Hierarchies & Open Culture – Your voice and ideas matter from day one

Let’s talk!

If you’re excited about building modern fullstack solutions and want to make an impact in cybersecurity, we’d love to hear from you.

We welcome applications from all backgrounds – diversity, equity and inclusion are core to our client’s values.