Senior Fullstack Engineer

Job title: Senior Fullstack Engineer

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 Platform.

Experience

• We are an industry-leading and award-winning company specializing in agentic AI communications channels - intranet, employee app and email solutions - that create engaging experiences for 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 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.

• 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

• 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

• Recharge - with 31 vacation days annually (incl. one floating holiday), plus pro rata fully paid Fridays off during August

• Support - we offer a company pension scheme

• Volunteers Day - you’ll get one day off per year for supporting a social project