Fullstack Engineer (Mid Level, Actions Team)

Staffbase; Dresden; On-site; EUR 90,000 - 120,000; Full time

Job summary

Staffbase’s Actions team powers Navigator, the AI assistant that can submit forms, complete tasks in integrations, or act on a user’s behalf. We build the hands that let AI do real work by enriching plugins, widgets, and the wider Staffbase platform, and by connecting to tools like Workday, ServiceNow, and Microsoft.

We also design the extensibility framework, a UI component library, and a robust connection layer to customer HR platforms and scheduling systems.

Qualifications

• Deep understanding of multi-tenant security and data isolation.
• Strong knowledge of React and TypeScript for frontend work.
• Real experience integrating third-party APIs, especially with challenging auth and legacy/on-prem systems.
• You have built a plugin system, SDK, or developer platform before.
• Experience with OAuth and enterprise SSO.

Skills

Multi-tenant security

OAuth

Enterprise SSO

API integration

Plugin systems

Tools

React

TypeScript

Java

Kotlin

Go

Cloudflare Workers

Job description

• 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
• 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

Requirements

• Deep understanding of multi-tenancy security and data isolation; you care about scope checks and preventing cross-tenant leaks
• 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
• Good judgment about what to standardize and what to leave flexible—drawing that line in the right place is central to this role
• You have built a plugin system, SDK, or developer platform before
• Real-world experience with OAuth and enterprise SSO
• You are comfortable with edge and serverless runtimes like Cloudflare Workers
• Developed a design system or component library that other teams depended on
• Experience treating AI code generation as a product surface, not just a personal tool