Senior Fullstack Engineer

Who you are

• Solid professional experience (typically 5+ years) as a fullstack developer, including working within engineering teams and owning solutions from concept to delivery
• Strong frontend skills with React.js, TypeScript, and JavaScript, paired with solid backend experience (e.g. Kotlin, Java, or Node.js)
• Confidence working with REST APIs and SDKs, and integrating with external systems
• Experience mentoring or guiding less-experienced developers, and a knack for bringing structure to how a team works
• Comfort working directly with stakeholders — you can translate business needs into technical solutions and validate them afterward
• A strong focus on quality, clean code, testing, and continuous learning
• Fluent written and spoken English and German — both are required, as you’ll work closely with German-speaking stakeholders and customers in the region
• A self-starter who works well both independently and as part of a team
• You understand and appreciate diversity and inclusivity in the workplace
• Experience with Go, MongoDB, Docker, Kubernetes, GitHub Actions, Terraform, Prometheus or Grafana
• A background in professional services, consulting, or building custom, customer-facing solutions
• Enterprise integration concepts such as SSO, SAML, OIDC, or SCIM
• A good understanding of REST and microservices architecture

What the job involves

• We’re looking for an experienced Senior Fullstack Engineer to join a newly formed team at Staffbase that builds custom solutions — extending the functionality and capabilities of our award-winning employee communications platform to meet real customer needs
• You’ll own solutions from beginning to end: shaping use cases together with stakeholders, building them across the stack, and validating them with the people who use them
• You’ll also help bring structure to a growing team of mid-level engineers and mentor them along the way. We’re looking for empathetic, motivated team players who are driven by ownership and growth. Let’s talk!
• As part of our tech stack, we use: React.js, TypeScript, JavaScript, Node.js, Kotlin, Go, Java, MongoDB, REST APIs & SDKs, Docker, Terraform, Selenium and Cypress, to name a few
• You’ll join a newly formed team dedicated to building custom solutions that extend the Staffbase platform for our enterprise customers. We turn specific customer needs into reliable, scalable extensions — widgets, plugins, and integrations — that make our product work exactly the way each customer needs it to
• Because the team is new, there’s real room to shape how we work: to set engineering standards, bring structure to our processes, and grow together. That’s where you come in
• Own the development of custom solutions end-to-end — from technical design through implementation, testing, and release
• Partner with stakeholders (customers, consultants, and internal teams) to define and detail use cases before development, then validate solutions and gather feedback afterward
• Build across the stack: customer-facing UI in React and TypeScript, backend services, and integrations with Staffbase and third-party APIs
• Mentor mid-level engineers and help bring structure, engineering standards, and good practices to a newly formed team
• Work in a cross-functional, agile setup and produce high-quality, well-tested code
• Give and receive valuable feedback in our code review process, and continuously learn and share knowledge with your peers
• Work iteratively — pushing code frequently, keeping a healthy CI/CD pipeline, and automating where it helps