Senior Back End Engineer

ZeroTier; Utrecht; Hybrid; EUR 60,000 - 80,000; Full time

Benefits offered by this job

Competitive salary

Equity compensation

Retirement savings plan

25 holiday days PTO

Flexible work hours

Career Enhancement Funds

Employee Referral Bonus

Job summary

ZeroTier is looking for a Senior Back‑End Engineer to design and implement core features for their Central Management Portal. You will develop API endpoints in Go, collaborate with an engineering team, and ensure security best practices.

The role offers a hybrid work environment with 3 days in the office at Utrecht Central Station and 2 days remote. Benefits include equity compensation, a retirement savings plan, and 25 days of PTO.

Qualifications

• Senior level experience building distributed systems at scale.
• Experience with backend REST APIs and security best practices.
• Ability to write clear technical documentation.

Responsibilities

• Build and iterate on API endpoints and backend services in Go.
• Own the design and evolution of public and internal APIs.
• Collaborate with engineers to enhance user experience.

Skills

Go service development

Distributed systems

REST API integration

Security best practices

Tools

PostgreSQL

PubSub

CI/CD pipelines

Job description

About Us

ZeroTier leads the world in next-generation connectivity and cybersecurity. Our platform provides highly secure, peer-to-peer virtual networks, relied upon by millions of users and businesses — from individual users and startups to mid-scale enterprises and Fortune 500 companies. We’re backed by investors including Battery Ventures, Bonfire Ventures, and Anorak Ventures.

The Role

We’re looking for a Senior Back‑End Engineer with strong expertise to architect and implement core features of our distributed and cloud‑based Central Management Portal. In this role you’ll design and extend our RESTful APIs in Go while also contributing to our frontend when needed. You will work as part of an execution‑focused engineering team, taking ownership of feature delivery, contributing to architectural decisions and ensuring security and code best practices across our services. You’ll also be expected to document and communicate clearly with teammates and stakeholders to support business objectives.

What You’ll Do

• Build, ship and iterate on API endpoints and backend services in Go, turning our product ideas into reliable platform features.
• Own the design and evolution of the public and internal APIs, ensuring speed, scalability and long‑term maintainability.
• Collaborate closely with other engineers to power great user experiences in our Central Portal.
• Develop and operate backend systems using PostgreSQL, PubSub, OpenFGA and other cloud-native services.
• Bake in security, testing and quality from day one to keep our public services safe and dependable as we scale.
• Improve and maintain our CI/CD pipelines and observability, helping the team catch issues more quickly and move fast with confidence.
• Act as a senior technical reference in the team, through code reviews, hands‑on mentorship and fostering pragmatic engineering decisions and thoughtful architectural decisions.

What We’re Looking For

• Senior level experience building and owning distributed systems at scale.
• Advanced knowledge of Go service development and backend best practices.
• Willingness to work occasionally on modern web technologies and frontend frameworks.
• Extensive experience integrating with and extending backend REST APIs.
• Experience working in a team with a continuous improvement and learning mindset.
• Demonstrated application of security best practices in public‑facing services.
• Ability to write clear technical documentation and communicate effectively with team members.
• Experience in a startup or fast‑paced environment is a strong plus.

Benefits

• Competitive salary.
• Hybrid work environment: 3 days at our office at Utrecht Central Station and 2 days from home.
• Equity compensation package.
• Retirement savings plan with employer contribution.
• 25 holiday days PTO per year.
• Flexible work hours (subject to management approval).
• Career Enhancement Funds.
• Employee Referral Bonus.

We encourage candidates from non‑traditional backgrounds to apply, regardless of formal education, training, and certification. We value diversity of experience and perspectives on our team, and strive to maintain a culture that allows every team member to do great work, bring their best ideas forward, and align those efforts with company goals and practices.

Individuals seeking employment at ZeroTier are considered without regard to race, color, religion, national origin, age, sex, marital status, ancestry, physical or mental disability, veteran status, or sexual orientation. Direct applicants only. Any recruiter/3rd party submissions we receive will be considered a gift. Written CVs and cover letters are encouraged. No calls please.