Senior Fullstack Engineer - Custom Solutions

The team 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. What you’ll be doing 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 What you need to be successful 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

Nice to have 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 you'll get Competitive

Compensation - we offer attractive salary packages including LTIP (unit-based Long Term Incentive Plan) Flexibility - we offer flexible working time models and the option of hybrid work, and support this with a yearly flex work allowance of €1560 Recharge - with 31 vacation days annually (incl. one floating holiday), plus pro rata fully paid Fridays off during August Support - we offer offering a company pension scheme Volunteers Day - you’ll get one day off per year for supporting a social project

A meeting lands on your calendar

If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.