Senior C# Developer

Permanent employee, Full-time · Budapest

Your mission
Are you passionate about writing clean, high-quality code and building reliable software solutions? We are looking for a Senior C# Developer to join our growing development team in Budapest, working for a multinational leader in the telecommunications sector. In this role, you’ll contribute to cutting-edge projects that power secure and efficient communication systems across the ​Globe.
Your profile

Duties and responsibilities

  • contribute to the continuous development, planning, documenting and testing of the IT systems developed and operated by the company 
  • plan and code main modules independently
  • cooperate in the software and database architecture planning
  • support the decision making processes by data base analysis 
  • participate in the research of new technologies related to the system, present ideas for system improvements
  • work closely with other colleagues of our DevOps team
  • based on your experience, you might also have the possibility to take part in the planning, development of the API, Library that supports our business software

Required qualifications and skills 

  • college or university degree
  • minimum of 5-years experience as a software developer 
  • high level expertise in C#, .NET Core and Entity Framework Core
  • solid grasp of designing and implementing relational databases using MS SQL Server
  • background in building web-based solutions, particularly with ASP.NET MVC
  • strong knowledge of REST (ASP.NET Web API) and SOAP (WCF)
  • ability to work autonomously and troubleshoot technical issues effectively
  • hands-on experience with Git version control system
  • proficient in English for both verbal and written technical communication
Advantages 
  • experience in microservice architecture design
  • knowledge of VoIP technologies (SIP, RTP)
  • experience in DevOps or continuous delivery approach
Why us?

We are offering 

  • Professional challenges, inspiring, diverse tasks
  • structured development process
  • learning path on new technologies (AI, LLM)
  • multiculture environment
  • flexible working hours and home office days
  • relaxed atmosphere, steady, supportive international team
  • easily accessible modern office with good infrastructure
  • complimentary coffee, fruit and snacks
About us
Telio is a medium-sized, internationally active, rapidly growing company in the field of telecommunications and IT services in the prison sector. As the European market leader, we have been providing communications solutions for prisons and their inmates worldwide for 25 years. With more than 270 employees, we are active in 25 countries and develop, install and operate communication and media systems that make an important contribution to resocialization in prisons as well as in correctional facilities.
We are looking forward to hearing from you!
Thank you for your interest in Telio. Please fill out the following short form. Should you have difficulties with the upload of your data, please send an email to jobs.headoffice@tel.io
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