Senior .Net Engineer

Nix

Bulgaria (European Union, Ukraine) Remote permanent

Posted: May 12, 2026

Required Skills

Job Description

N-iX is looking for a Senior .Net Engineer for one of our clients.
As a .NET Engineer you will drive the technical modernization of a large-scale system from .NET Framework 4.8 to .NET 8. Your work will span the full backend stack — replacing Windows-only dependencies, refactoring legacy patterns, migrating data access to EF Core, and ensuring every service is portable, containerizable, and ready for AWS cloud deployment. You will collaborate closely with DevOps and database engineers as part of a cross-functional Agile team delivering a phased, production-safe migration.

Responsibilities:

• Migrate a .NET Framework 4.8 application to .NET 8.

• Migrate a large database-first Entity Framework 6 model to EF Core 8 across multiple bounded contexts, one domain at a time.

• Identify and replace Windows-only libraries and assembly references that prevent building and running on Linux.

• Establish unit test coverage measurement and enforce quality gates as part of the migration pipeline.

• Collaborate with the DevOps engineer on Dockerfile authoring, environment configuration, and secrets injection.

• Participate in Agile/SCRUM processes, conduct code reviews, and document migration decisions.

Must-Have Qualifications:

• 5+ years of C# and .NET backend development with strong knowledge of ASP.NET and ASP.NET Core.

• Proven, hands-on experience migrating .NET Framework applications to .NET Core / .NET 8 in production.

• Solid experience with Entity Framework Core.

• Solid knowledge of DDD, CQRS, and repository patterns in layered .NET architectures.

• Familiarity with Docker multi-stage builds and Linux container fundamentals for .NET applications.

• Proficient with xUnit and Moq for unit testing; comfortable with container-wired test setups.

• Experience with AWS ECS / Fargate and ECR for deploying containerized .NET applications.

• Familiarity with MassTransit and RabbitMQ or Amazon MQ for event-driven messaging.

• Experience with Hangfire or similar background job processing frameworks.

• Proficient in Git and familiar with Agile/SCRUM team processes.

Nice-to-Have Skills:

• Experience building CI/CD pipelines for .NET projects.

• Familiarity with micro-frontend architecture and Angular-based single-page applications.

• Experience with automated code coverage tooling and enforcing coverage thresholds in CI.

• Experience with performance optimization and scalable enterprise backend systems.

We offer*:

• Flexible working format - remote, office-based or flexible

• A competitive salary and good compensation package

• Personalized career growth

• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)

• Active tech communities with regular knowledge sharing

• Education reimbursement

• Memorable anniversary presents

• Corporate events and team buildings

• Other location-specific benefits

*not applicable for freelancers

Why Apply Through MisuJob?

AI-Powered Job Matching: MisuJob uses advanced artificial intelligence to analyze your skills, experience, and career goals. Our matching algorithm compares your profile against thousands of job requirements to find positions where you have the highest chance of success. This saves you hours of manual job searching and ensures you only see relevant opportunities.

One-Click Applications: Once you create your profile, applying to jobs is effortless. Your resume and cover letter are automatically tailored to highlight the most relevant experience for each position. You can apply to multiple jobs in minutes, not hours.

Career Intelligence: Beyond job matching, MisuJob provides valuable career insights. See how your skills compare to market demands, identify skill gaps to address, and understand salary benchmarks for your experience level. Make data-driven decisions about your career path.

Frequently Asked Questions

How do I apply for this position?

Click the "Register to Apply" button above to create a free MisuJob account. Once registered, you can apply with one click and track your application status in your dashboard.

Is MisuJob free for job seekers?

Yes, MisuJob is completely free for job seekers. Create your profile, get matched with jobs, and apply without any cost. We help you find your dream job without any hidden fees.

How does AI matching work?

Our AI analyzes your resume, skills, and experience to understand your professional profile. It then compares this against job requirements using natural language processing to calculate a match percentage. Higher matches mean better fit for the role.

Can I apply to jobs in other countries?

Absolutely. MisuJob features jobs from companies worldwide, including remote positions. Filter by location or look for remote opportunities to find jobs that match your preferences.

Ready to Apply?

Join thousands of job seekers using MisuJob's AI to find and apply to their dream jobs automatically.