Senior Full Stack Engineer

Software Engineering Sofia, Bulgaria

Progress is an experienced, trusted provider of products designed with customers in mind, so they can develop the applications they need, deploy where and how they want and manage it all safely and securely. We take pride in what we do, always valuing the whole person—at work and in life. Our diverse life experiences enrich our culture because people power progress. And as a Senior Full Stack Engineer in Sofia, you can join us in doing what we do best: propelling business forward.

To support the company’s innovations, we are currently expanding our existing Fiddler Clients team.

The primary responsibility of the Fiddler Clients team is to develop several products in the Fiddler family – Fiddler Everywhere, Fiddler Classic and FiddlerCore. Our goal is to make the life of the developers easier by providing tools for capturing network traffic, inspecting, and analyzing it. We actively look for innovations and paths to help the developers in the new challenges they face every day.

The role is a good fit for someone who is interested in both front-end and backend tasks and is passionate about researching ways to solve tough problems. You’ll also be mentoring junior people in the team and help them grow in their careers. You will have the opportunity to collaborate with Principal Software Engineers both from the team and from other teams, which is an amazing opportunity for personal growth, both in the technical and social aspects.

In this position, you’ll have to implement full user stories – from the implementation in the .NET code through the actual UI in the Angular part of the application. In many cases you’ll have to show creativity and find ways to implement functionalities that no one else had done before.

Your profile:

  • Solid experience with .NET (C#)
  • Solid JavaScript knowledge
  • Solid experience with client-side JavaScript frameworks (preferably Angular)
  • Solid experience with version control systems (preferably Git) and peer code reviews
  • Fluent English – both verbal and written
  • Smart, friendly team player, and you enjoy working with others to pursue a common goal
  • Familiar with Object-Oriented Design and Architecture, as well as Design patterns
  • Experience with mentoring other people

 Would be considered as a plus:

  • Experience with research and solving tough challenges
  • Experience with process improvements in the team/company – what was not working well, and you took the opportunity to resolve it.
  • Experience with different operating systems – macOS, Windows and Linux.
  • Knowledge of network protocols
  • Bachelor/Master’s degree in computer science or related area

If the above sounds interesting, then we would like to hear from you! What we offer in return is the opportunity to elevate your game and to also enjoy: 


  • Generous remuneration package
  • Employee Stock Purchase Plan Enrollment

Vacation, Family, and Health

  • 30 days paid annual vacation
  • Flexible working hours and hybrid working model – most of us will be splitting our time between working from home and being at the office two-three times a week.
  • An extra day off for your birthday
  • 2 additional days off for volunteering
  • Premium healthcare and dental care coverage
  • Additional pension insurance
  • Well-equipped gym on-site with CrossFit equipment and a climbing wall
  • Co-funded Multisport card
  • Daycare Center for your little ones onsite


Together, We Make Progress

Progress is an inclusive workplace where opportunities to succeed are available to everyone. As a multicultural company serving a global community, we encourage a wide range of points of view and celebrate our diverse backgrounds. Our unique combination of perspectives inspires innovation, connects us to our customers and positively affects our communities. It is only by working together and learning from each other that we make Progress. Join us!