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 Europe's fastest growing bootstrapped 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 part of our talented development team and contribute to developing security solutions aimed at preventing and stopping the most advanced cyber threats like ransomware, phishing and other attacks.

You will have a solid background in .NET development and openness towards doing research for certain tasks.

We're open to candidates anywhere in Romania.

• In Bucharest: work from home or visit the office when you'd like.
• In other cities: work fully remote — we've built strong online onboarding and collaboration practices.

Collaboration-wise, we work based on permanent employment contracts.

Responsibilities

• Develop complex business applications using the latest tools and technologies.
• Bring fresh and new ways to improve and maintain high standards of software quality within the team.
• Ability to prioritize and easily adapt to new and different situations.
• Work with other software developers to plan, design, test and deliver results at time.
• Pragmatism skills to quickly assess information, identify problems, and find the best solutions in an ever-changing work environment.

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.
• Experience building and deploying cross-platform applications using .NET.
• Familiar with REST APIs, microservices, and general principles of scalable backend communication.
• Self-driven, structured, and capable of working independently in a startup-like environment.

Nice to Have

• Understanding of cybersecurity fundamentals and secure software development principles.
• 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

• Regina Maria health plan.
• Monthly budget in the Benefit platform (800 RON/month).
• Additional company-paid days off ("Personal Day" and "Anniversary Days").
• Reimbursement for glasses expenses according to company policy.
• Referral bonus.
• Bookster and LinkedIn Learning subscriptions.
• Personal and professional development (trainings and certifications).

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.