Open Positions

Amsterdam, NL

Senior Backend Developer


Who are we:

We are Hadrian. A force that reshapes the future of security. Born in August 2021, we've secured €20 million in funding and the backing of ABN AMRO Ventures, propelling us into a new era

We provide companies with a real-time Exposure Management platform, viewing security through a hacker's eyes because, well, hackers understand hackers best. We continuously map the digital footprint of organizations, discover risks, and prioritize remediation for security teams to harden their external attack surfaces

Located in Amsterdam's buzzing Leidseplein and London's famous Baker Street, our diverse team from 20+ countries is on a mission to revolutionize security. Join us in making waves and securing over 200 businesses, and be at the forefront of automated offensive security

Your role:

As a Senior Backend Developer at HADRIAN, your primary goal is to build and maintain APIs powering hacker admin tooling and frontend applications. You will be entrusted with solving complex problems using creativity and ensuring seamless integration of the API, which serves both the frontend and customers. In addition you will play an important role in building features, improve our system stability, create a better developer experience and guiding other developers

What you will do as a Senior Backend Developer at Hadrian:

  • API Development:
    Contribute to the development of well-designed, scalable, and high-performing APIs that power the client app and ensure that APIs are robust, efficient, and meet the needs of both our frontend and customers

  • Code Review:
    Review code from developers across various teams to maintain a high standard of quality and consistency in the codebase, and provide constructive feedback

  • Design, Implement, and Deploy:
    Take ownership of your team's services, leading the entire lifecycle from design and implementation to production deployment
    Utilize your experience in building distributed event-driven systems to enhance and optimize Hadrian's microservices architecture

  • Training and Mentorship:
    Guide and train Junior and Medior Developers

  • On-Call Support:
    Participate in on-call rotations to provide support during production incidents

You are fit for this job because you:

  • Possess a minimum of 4 years of relevant experience
  • Hold a bachelor’s degree in Computer Science or a related field
  • Are skilled in building distributed event-driven systems
  • Demonstrate strong proficiency in .NET and C#
  • Exhibit proficiency in PostgreSQL (or other relational databases like MSSQL, MySQL) and writing SQL queries
  • Implement API design best practices, including versioning, scaling, and documentation
  • Possess knowledge of testing tools for Unit, Integration, and End-to-End testing
  • Utilize Object-Relational Mapping (ORM) such as Entity Framework (EF) or similar technologies
  • Have experience in building event-driven systems and microservice architecture
  • Demonstrate experience in developing software for cloud platforms (AWS, GCP, Azure)

Our Stack

  • C#
  • Knative Serving/Eventing
  • PostgreSQL
  • Docker/Kubernetes
  • .NET Core
  • AWS
  • Kafka event streaming

Benefits at Hadrian:

  • Permanent contract
  • Unlimited paid holiday
  • Stock options package
  • Mobile phone stipend
  • Laptop
  • Work-from-home budget
  • Referral bonuses
  • Business travel card
  • Swapfiets
  • Joyful team activities

Why you want to be part of Hadrian:

Make the internet safer: We enable companies to protect their customers, employees, and other stakeholders from malicious hackers by providing real-time Exposure Management from the Hacker’s perspective

Board a primed rocket ship: Hadrian is growing fast; the team is approaching 70 wonderful people, notable customers are signed, and significant funding is raised. Now is the time to join our high-growth journey

Be part of a strong and dynamic culture: Our values define who we are as a group and serve as the cornerstones to guide us in building a product that our customers love. At Hadrian, we achieve this by championing a culture that takes ownership, succeeds together, increases velocity, and pursues growth

Sounds like the role for you? Hit the apply button!

Our clients are seeking a world-class and reliable digital security service. That is exactly what we are offering. Therefore, a background check will be part of the process.


Apply for this position

Think you're a good fit? We want to hear from you!

Learn more about Hadrian

Check out the careers page to learn more about working at Hadrian.