Introduction

Nexufend is revolutionizing enterprise network security with a groundbreaking distributed firewall that provides process-level visibility. Founded by entrepreneurs who built Safing (4th fastest-growing open-source startup in 2022), we're scaling our B2B security platform.

Your tasks

We're seeking an experienced software systems engineer to build and scale the backend services of our network security platform, ranging from complex databases to scalable log mangement and data optimization. You'll primarily work with Golang, Protobuf, Grafana, Loki and PostgreSQL. Working directly with our CTO, you'll have significant influence in shaping the whole platform and will redefine how IT administrators can bring security to their networks.

Tasks

Golang Backend / OS Integration Development (85%):
• Build backend services and features in Golang
• Interact with PosgreSQL and Loki data sources
• Design database structures and whole backend services
• Scale services and data management
• If skilled: Work on macOS, iOS, Android agents and system/kernel integration

Supportive Tasks (15%):
• Use your other skills to help out colleagues or fill needs until these roles are properly filled
• Manage and scale infrastructure
• Build and maintain CI/CD pipelines

General Responsibilities: • Work independently and self-motivated on assigned features
• Engage proactively in the creative process with forward-thinking solutions
• Participate in code reviews and technical discussions
• Collaborate with fronted developers on API design and integration
• Write clean, maintainable, well-documented code
• Contribute to architecture design decisions

Your profile

Requirements

Must Have: • Proficient in Golang
• Deep knowledge of networking, network security and firewall technology
• Experience with PostgreSQL, Protobuf, HTTP2
• Familiarity with log management, Grafana, especially Loki
• Modern development workflow using Git, CI/CD, GitHub, ...
• Ability to work independently and self-motivated
• Forward-thinking approach and engagement in creative processes
• Strong problem-solving skills
• Excellent English communication skills (written and verbal)
• Live within 5 hours of Vienna Intl. Airport (door to door scheduled travel time)
• Willingness to come to the office (or similar location) up to once per month (likely only once per quarter)

Nice to Have: • Low Level Operating System Development Knowledge
• macOS and iOS network extensions experience
• Android network integration experience
• Experience managing and scaling Linux servers, PostgrSQL, Loki and containers
• Background with B2B SaaS products
• Experience with Docker and containerized applications
• Contributions to open-source projects

Benefits

• On-site is also possible, even temporarily, but mandatory for the first two weeks.

• Competitive salary with equity options
• Flexible remote work within the EU
• Shape the product technology from the ground up
• Significant creative freedom and ownership over UI/UX decisions
• Work with experienced founding team with proven track record
• Modern tech stack with cutting-edge technologies
• Professional development budget
• Collaborative, innovation-driven culture
• Direct impact on product development and company growth
• Be part of revolutionizing network security
• Work on cutting-edge cybersecurity technology
• Join at early stage with significant growth potential
• Help businesses worldwide protect critical infrastructure
• European-based company aligned with EU data protection standards

Nexufend is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.

Contact

Ready to revolutionize network security? We'd love to hear from you!

Apply with:
• Your CV/resume
• Link to code examples, eg. pet projects, libraries, open source production code
• Brief note on why you're excited about this role (or a recipe for hawaii toast)

We're looking to fill this role by Q1 2026 to support our MVP deployment.