Backend Software Engineer (Node.js)

Join forces with us on our mission to build a better IT industry. We are currently looking for a highly skilled Backend Software Engineer (Node.js) to join our team in Prague.

Please note that applicants must live in Prague and hold a valid work permit at the time of application to be considered for this role.

Team:
You will join the UniFi OS team, which develops and maintains the core operating system powering UniFi Cloud Gateways, NAS, and NVRs. The team provides the secure and stable platform that UniFi applications depend on across networking, camera surveillance, VoIP, and access control.
This role is well suited to an engineer who enjoys solving complex product and platform problems, improving reliability, and working across backend, embedded, cloud, and application boundaries.

Responsibilities:

• Design, build, and maintain backend services in Node.js and TypeScript.
• Develop secure, scalable, and maintainable APIs and service workflows.
• Contribute to architecture and code design decisions across the team.
• Review code and help maintain strong engineering standards, release quality, and development workflows.
• Investigate production issues, debug complex failures, and ship robust fixes.
• Work closely with embedded, web, mobile, product, and design teams to deliver platform capabilities used across the UniFi ecosystem.
• Improve the reliability, observability, and developer experience of the services you work on.

Requirements:

• 5+ years of professional experience with Node.js and TypeScript
• 3+ years of experience working with SQL databases such as PostgreSQL
• Experience building software for connected devices, infrastructure products, networking systems, or similarly complex environments
• Good understanding of web security, including OWASP, browser security fundamentals, and OAuth
• Strong debugging skills and experience with defensive programming
• Professional experience with Git, Unix/Linux, and Docker-based environments
• Ability to work independently and take ownership of technical work
• Strong written and verbal communication skills
• High proficiency in English, both written and spoken

Nice to have:

• Experience with Rust or Go
• Experience with gRPC
• Experience with WebRTC
• Experience with DevOps, CI/CD, and build pipelines
• Practical experience using AI tools and LLMs to improve engineering productivity and quality
• Czech language

Benefits:

• Competitive salary and 5 weeks of vacation per year
• Discretionary bonuses based on individual performance
• Flexible working hours, home office
• Top floor office near Andel with terrace and amazing view of Prague
• Kitchen packed with food, snacks & sodas, coffee, meal allowance
• Teambuilding activities
• A collective of developers who want to make the best product. Maximum effort to keep processes to a minimum, no complex reporting and similar habits