Staffbase

Senior Fullstack Engineer - Custom Solutions

Remote, United States remote Entry Salary not listed
remote Technology & IT Curated
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About the role

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 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 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

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Interview prep

Walk in with sharper answers.

Use this as a quick practice sheet before you speak with the employer.

Role
Technology & IT API integration Javascript Project Management Sales remote

Likely questions

  1. Tell us about work you have done that is close to the Senior Fullstack Engineer - Custom Solutions role.
  2. How would you approach your first 30 days at Staffbase?
  3. Which of API integration, Javascript and Project Management have you used recently, and what did it help you achieve?
  4. Describe a time you solved a problem without waiting to be told exactly what to do.
  5. How do you stay organised and communicate clearly when working remotely?

Prepare before the call

  • A recent example that proves your experience with API integration, Javascript and Project Management.
  • One short story with a problem, your action, and the result.
  • Two examples that show the strengths listed on your CV.
  • A clear reason why this role and company interest you.
  • Your availability, preferred work style, and salary expectations.

Ask them

  • What would success look like in the first 90 days?
  • What are the main problems this hire should help solve?
  • How does the team give feedback and measure good work?
  • What does a normal working week look like for this role?
Practice line

I am interested in the Senior Fullstack Engineer - Custom Solutions role because I can bring practical experience in API integration, Javascript and Project Management, learn the team quickly, and contribute to the outcomes Staffbase needs from this hire.

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