Senior .NET Developer

We are Heimdal and cybersecurity is our passion. Join us in an internationally expanding business, leading the fight against cybercrime 

When joining Heimdal, you will embark on a thrilling ride in a fast-growing cybersecurity business, where we believe that the team is the cornerstone of what we do tomorrow. We are leading the fight against cybercrime, developing new technologies and providing intelligence to protect over 15,000 companies worldwide against cybercriminal attacks and data security breaches. 

Our award-winning line-up of 10+ fully integrated cybersecurity solutions span the entire IT estate, allowing organizations to be proactive, whether remote or onsite. From endpoints, networks, and cloud to emails, and beyond, Heimdal offers advance detection and response capabilities, ensuring complete security coverage. 

The role

We are looking for a skilled and experienced .NET Developer with a passion for building high-performance, cross-platform systems. You will be designing and developing a next-generation cybersecurity agent for Linux, built on .NET 8. 

You will have a solid background in .NET development and a good understanding of the Linux ecosystem, allowing for seamless end-to-end integration. 

You are based in Tunisia and will be working fully remotely. 

Responsibilities

• Product Ownership: Take full technical responsibility for a new agent-based product targeting Linux systems. You'll define and evolve its architecture, delivery pipeline, and integrations.
• Design & Develop: Build a cross-platform system daemon in .NET 8+, optimized for Linux environments (Ubuntu, CentOS, Red Hat)
• Linux Integration: Interface with system-level components (package managers, daemons, logs, etc.) to provide seamless and native-like behavior.
• Security Focus: Collaborate with internal cybersecurity teams to ensure secure design and implementation across all layers of the agent.
• Automation: Use Linux scripting (Bash) to streamline deployment, debugging, and operational tasks.
• Cross-Team Collaboration: Work alongside DevOps, backend, and security engineers to align on architecture and deployment strategies.
• Prepare for Growth: Help onboard additional team members (developers, QA) as the product evolves, and guide technical direction.
• Documentation & Quality: Maintain clear documentation, and contribute to testing and code quality strategies.

Requirements

• 5+ years of hands-on experience with .NET Core / .NET 8+ 
• Strong C# fundamentals with experience building and deploying cross-platform or backend services
• Linux experience: While you don't need to be an expert from day 1, you should preferably be comfortable developing and debugging on Linux (Ubuntu, CentOS, Red Hat) including working with system services and terminal tools
• Experience with Bash scripting for automation, deployment, or operational tasks.
• Solid understanding of cybersecurity fundamentals and secure software development principles.
• Experience building and deploying cross-platform applications using .NET.
• Familiar with REST APIs, microservices, and general principles of scalable backend communication.

Nice to Have

• Experience building software agents or system daemons.
• Exposure to low-level Linux internals, system calls, or inter-process communication.
• Familiarity with CI/CD pipelines, automated testing, and infrastructure as code.
• Experience working with containerized applications (e.g., Docker).
• Cloud exposure (Azure, AWS, or GCP).

Benefits:

• Remote working;
• Additional company paid time off such as personal day (1 day per year) and anniversary days (1 day for each year spent in Heimdal);
• Personal and professional development (training and certification);
• Challenging and interesting projects;
• Fast growing company with huge personal and professional growth potential;
• Driven and awesome team of dependable and dedicated people;
• Fun, flexible and relaxed work environment.

Our Mission
We are leading the fight against cybercrime and protecting the operational integrity of all midmarket and lower enterprise companies. 

Our Culture
We believe in hiring the best and the brightest while cultivating a culture of collaboration and execution.

We are Dedicated, Innovative, and Humble. As in devoted and passionate about our work and what we do. We seek to optimize, improve, and challenge status quo. We are open-minded to new ideas and to feedback, and we know success comes from hard work.

We are committed to constantly create an environment where each individual has the opportunity to grow, personally and professionally. We have a strong sense of unity and togetherness, and having fun together is a key element at Heimdal.

We are an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees. All employment decisions are based on business needs, job requirements and individual qualifications, without regard to gender, race, color, disability, religion, marital status, family or parental status.