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About Staffbase We inspire people to achieve great things together. Our mission is to help organizations unlock the power of inspirational communication with the first AI-native Employee Experience Platform . Our industry-leading and award-winning agentic AI communications channels - intranet, employee app and email solutions - create engaging experiences that connect and empower employees. Headquartered in Chemnitz, Germany and New York City, with offices in Berlin, London, Sydney, Tokyo, Prague, and Minneapolis–St. Paul, our diverse team of 550+ employees supports 1,500+ customers—reaching over 14 million employees—in transforming their employee experience. We are proud to be a Unicorn company—privately valued at over $1 billion—demonstrating strong growth, innovation, and lasting impact in our industry. Together, we’re shaping the future of workplace communication. We're looking for a Fullstack Engineer to join our Actions team in building the core infrastructure that powers our plugin platform. You'll create the UI components, integration layers, and security mechanisms that enable our customers to extend the platform with custom integrations while maintaining safety and flexibility across our 1,500+ customer base. This is essential infrastructure work that shapes how our customers scale their integrations. Our environment Working with skilled and like-minded professionals in a team that values diversity and inclusivity We aim to create a flexible and agile work environment that promotes the well-being and work-life balance of our employees We believe that team events during working hours play a vital role in building an exceptionally effective team, and we encourage them We are enthusiastic about technology and committed to using it to improve the world We follow the “You build it, you run it” approach and take pride in it The Team The Actions team sits at the heart of Staffbase's AI ambitions. We're the team that gives Navigator — our AI assistant and the main entry point into Staffbase — the ability to actually do things: submit a form, complete a task inside an integration, or take an action on a user's behalf through the agent. If Navigator is the brain, we build the hands. That means two big things. First, we enrich what the AI can see and act on, our plugins, our widgets and the wider Staffbase platform so the assistant can do real work, not just talk about it. Second, we build the extensions that connect to the tools people already use, like Workday, Personio, ServiceNow and Microsoft. We're not just shipping features, though. A core part of our mission is building the extensibility framework that lets others build too. What you'll be doing Building a UI component library that generated apps can assemble from, turning components like payslip views and approval flows into maintained, reusable pieces instead of regenerated artifacts Creating the connection layer between generated apps and customer source systems—HR platforms, time-tracking and scheduling systems, and a long tail of vendors with thin or undocumented APIs Defining extension points (widgets, menus, sidebars) so plugins declare where they surface and what they connect to in a single, clean configuration Designing and implementing a cross-integration authentication solution that lets customers run multiple integrations without forcing employees to log in repeatedly Shipping plugins on the platform yourself, staying a consumer of what we build so we catch gaps early What you need to be successful Strong knowledge of React and TypeScript for frontend work Java/Kotlin or Go an TypeScript experience for backend services Real experience integrating third-party APIs, especially the challenging ones—inconsistent auth, partial documentation, legacy and on-prem systems Deep understanding of multi-tenancy security and data isolation; you care about scope checks and preventing cross-tenant leaks Good judgment about what to standardize and what to leave flexible—drawing that line in the right place is central to this role Nice to have experience You are comfortable with edge and serverless runtimes like Cloudflare Workers You have built a plugin system, SDK, or developer platform before Developed a design system or component library that other teams depended on Real-world experience with OAuth and enterprise SSO Experience treating AI code generation as a product surface, not just a personal tool 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 Find Jobs in Germany on Arbeitnow