Senior C Developer

Senior Software Developer (C)

Crossvallia specializes in IT infrastructure, cloud computing, and security, providing IT services, experience and know-how for IT clients across the globe, most notably HAProxy Technologies. HAProxy Technologies is the company behind HAProxy, the world’s fastest and most widely used software load balancer. Organizations rapidly deploy HAProxy products to deliver websites and applications with the utmost performance, observability, and security at any scale and in any environment.

The passion for what we do has no boundaries, our resilience is authentic and our courage is limitless when facing new challenges. We are proud of the culture we have built together.

We are proud of our people at the service of technology #TechforPeople.

What you will do in this role:

As part of the development team, you’ll have the opportunity to collaborate with colleagues and teams covering a range of technologies and applications, including the core HAProxy team. Our primary stack includes C, Go, Python, Vue.js, Elasticsearch and more, but your focus will be on enhancing HAProxy in C-related projects.

Participate in designing, planning and creating standalone programs or integrated components (and their documentation) for Open Source and/or commercial use in conjunction with the Open Source HAProxy Load Balancer software

  • Process Oriented: Participate in the complete lifecycle of software development including prototyping, implementation, testing, maintenance, and support. 
  • Passionate: A self-starter who has a passion for technology and the ability to use efficient coding techniques to produce well-structured, easily maintainable code. Mindful of solutions that emphasize performance, reliability, and scalability.
  • Accountability: Strive for continuous improvement, embrace change, feedback, quick iterations, and embrace failure in order to learn from mistakes.
  • Communication: Liaise with peer developers, designers and product owners to identify requirements that affect scope, schedule, and quality.

What you will bring to this role:

An experienced contributor with a track record of execution and delivery in a software development environment.

  • University degree or college diploma in a Computer Science, Engineering or related field
  • 5+ years solid years experience with C, Shell, HTTP, TCP/IP and Git
  • Proven experience designing, building, and maintaining efficient, reusable and reliable C code
  • Ability to develop technical specifications from high-level business requirements
  • Strong understanding of software engineering principles, best practices and CI/CD fundamentals
  • Experience developing and deploying in Linux/Unix-based environments
  • Experience with Linux patching 
  • Written and verbal fluency in English is mandatory, while French is a nice bonus
  • Strong troubleshooting and problem-solving skills
  • Excellent communication, interpersonal skills and attention to details & deadlines
  • Ability to work under pressure and to easily flow with changes to priorities and projects
  • Ability to work independently and as part of a team in a high-performance organization


  • Knowledge of cloud environments is a plus

The Position:

This is a full-time position, for candidates located in Croatia and Bosnia.

Why Crossvallia:

Surround yourself with talented team members. We hire great people based on our core values creating a fun, collaborative and stimulating work environment. Being on the cutting edge of technology, employees have opportunities for growth through upskilling and to learn a vast array of technologies. We are a fast-growing team, allowing you to have a bigger impact on our future.