Skip to main contentA logo with &quat;the muse&quat; in dark blue text.

Senior Software Engineer (.Net)

2 days ago Sofia, Bulgaria

We are looking for a highly experienced Senior Software Engineer with a strong background in the Microsoft technology stack. You will play a key role in the design, development, and support of enterprise-grade applications using .NET Framework 4.5.2, WCF, MSMQ, MS SQL Server, and other associated technologies. The ideal candidate should be hands-on, self-motivated, and comfortable working in complex distributed environments.

Why Join Exadel

We’re an AI-first global tech company with 25+ years of engineering leadership, 2,000+ team members, and 500+ active projects powering Fortune 500 clients, including HBO, Microsoft, Google, and Starbucks.

From AI platforms to digital transformation, we partner with enterprise leaders to build what’s next.

What powers it all? Our people are ambitious, collaborative, and constantly evolving.

About the Client

The world's largest human resources consulting firm is headquartered in New York City, with its main branches in 40+ countries. Over 20,500 employees operate internationally in more than 130 countries. Its services are used by 97% of Fortune 500 companies.

What You’ll Do

  • Design, develop, and maintain robust and scalable backend services using .NET Framework 4.5.2, WCF, and MSMQ.
  • Integrate APIs and services via Apigee API management platform.
  • Work with MS SQL Server for database design, optimization, and query development.
  • Implement secure authentication and authorization mechanisms using MS ADFS and Active Directory.
  • Maintain and configure applications hosted on IIS and running on non-containerized Windows VMs/EC2 in multi-region AWS environments.
  • Troubleshoot production issues and provide timely resolutions.
  • Collaborate with cross-functional teams including DevOps, QA, and Architecture to deliver high-quality software solutions.
  • Contribute to code reviews, technical documentation, and continuous improvement initiatives.

What You Bring 

  • 5+ years of experience in backend development using .NET Framework 4.5.2.
  • Deep expertise with WCF, MSMQ, and Windows-based service architectures.
  • Strong understanding of MS SQL Server, including stored procedures, performance tuning, and data modeling.
  • Experience with Apigee or other API Gateway platforms.
  • Hands-on experience with MS ADFS and Active Directory for identity and access management.
  • Solid understanding of IIS configuration and application hosting on Windows VMs (non-containerized) in AWS EC2.
  • Familiarity with multi-region deployments, failover, and high availability patterns.
  • Excellent problem-solving skills and ability to work independently in a fast-paced environment.
  • The need to work with VDI on the project

Nice to have

Want more jobs like this?

Get jobs in Sofia, Bulgaria delivered to your inbox every week.

Job alert subscription
  • Experience with infrastructure automation or scripting (e.g., PowerShell, Terraform).
  • Familiarity with modern .NET versions (Core/6/7) for future modernization plans.
  • Understanding of DevOps tools and CI/CD processes.

English level

Upper-Intermediate

Legal & Hiring Information

  • Exadel is proud to be an Equal Opportunity Employer committed to inclusion across minority, gender identity, sexual orientation, disability, age, and more
  • Reasonable accommodations are available to enable individuals with disabilities to perform essential functions
  • Please note: this job description is not exhaustive. Duties and responsibilities may evolve based on business needs
Client-provided location(s): Sofia, Bulgaria, Dabas, Hungary, Kėdainiai, Lithuania, Ozorków, Poland, Făgăraș, Romania
Job ID: 5598356004
Employment Type: OTHER
Posted: 2025-07-31T23:36:15

Perks and Benefits

  • Health and Wellness

    • Parental Benefits

      • Work Flexibility

        • Office Life and Perks

          • Vacation and Time Off

            • Financial and Retirement

              • Professional Development

                • Diversity and Inclusion