Senior Software Engineer
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Job Location:
Monthly Salary:
Posted on:
16-10-2025
Vacancies:
1 Vacancy
Job Summary
Job description
Do you love building digital environments and web applications that - literally - everyone can enjoy Does that include the development and documentation of complex systems Do you especially enjoy sparring sessions with developers architects and designers In that case iO might just hold the perfect spot for you at our campus in Sofia Bulgaria.
At iO youll find yourself in an international organization that looks and feels closely connected thanks to our hybrid way of working and cosy campuses open to all employees across Belgium the Netherlands Sweden and that culture of open cross-campus communication and collaboration youll find yourself in a self-managing Scrum team composed of colleagues and clients alike.
You optimize our current platforms and develop new customized solutions and features. As you develop your way into iO history youre always on the lookout for new techniques to introduce to your team. Youre vocal during standups and like to share your ideas with the rest. This is - in fact - just one way of showing youre a team player with good communication skills one who is eager to learn quickly and use new technologies
Even with experience you know theres always plenty to learn. Thats why we support you in your development. Not only within your professional field but also on a personal level. Think for example of soft-skills training Expert Groups and certificates or inspiring events.
Job requirements
What you bring to the table as a Senior Software Engineer
5 years of professional programming experience with C# Framework/Core MVC Web APIs
Deep understanding of object-oriented design and software design patterns
Strong knowledge of SQL Server Entity Framework LINQ
Hands-on experience with cloud platforms like Azure or AWS CI/CD pipelines and processes
Experience with Angular React or
Experience with Agile development processes
Good understanding of HTML5 JavaScript
University degree in IT
Proficiency in English both written and spoken
Analytical thinking and problem-solving skills
Excellent communication skills to collaborate effectively with cross-functional teams
Experience considered as a plus:
Knowledge of CMS systems like Sitecore or Umbraco
Coaching or mentoring experience
What We Offer
The opportunity to work on challenging and impactful projects with talented and supportive teams located in Bulgaria Belgium the Netherlands Sweden and Denmark
A chance to learn and grow in a fast-paced and dynamic environment
Hybrid working mode
Programs to grow and develop yourself
An informal and open working atmosphere
26 days of annual paid leave
Modern office near Mall of Sofia
Additional health and dental insurance
Sport cards
Public transport card/ fuel allowance
Mobile device reimbursement
Personal training budget and study days
A competitive salary
All done!
Your application has been successfully submitted!
Required Experience:
Senior IC
Key Skills
- Spring
- .NET
- C/C++
- Go
- React
- OOP
- C#
- AWS
- Data Structures
- Software Development
- Java
- Distributed Systems
About Company
Data and content agency RAAK is becoming iO — helping you tackle challenges in marketing, technology, strategy, and content.
