Senior .NET Developer

Nuvei

Sofia, Sofia City Province, Bulgaria Hybrid permanent

Posted: January 29, 2026

Required Skills

Job Description

The world of payment processing is rapidly evolving, and businesses are looking for loyal and strategic partners, to help them grow.

Nuvei is bringing payments up to speed. Our future-proof technology allows businesses to accept cutting-edge payment options, optimize new revenue streams, and get the most out of their stack. We believe in turning payment barriers into accelerants, propelling businesses forward with tailored solutions. With a single integration and advanced customization tools, Nuvei delivers unsurpassed flexibility that enables businesses to adapt quickly and enter new markets seamlessly.

At Nuvei, we live our core values, and we thrive on solving complex problems. We're dedicated to continually improving our product and providing relentless customer service. We are always looking for exceptional talent to join us on the journey!

We are looking for an experienced .NET Developer to join our R&D team. The team is responsible for designing and implementing inventive products for the Fintech industry.

Responsibilities

• Participate in requirements analysis and translate business needs into technical solutions
• Collaborate with internal teams to produce software design and architecture
• Write clean, scalable code using C# programming language
• Test and deploy applications and systems
• Revise, update, refactor and debug code
• Improve existing software and reduce technical debt
• Conduct code reviews and mentor junior team members
• Take ownership of features from design through delivery

Requirements:
• At least 5 years of experience and knowledge of web-services, web APIs and .NET Microservices
• At least 3 years of experience with cross-platform server-side technologies .NET Core
• At least 5 years of experience with C# and .NET Framework 4.8 and above
• Experience with MSSQL, including schema design, writing queries and stored procedures
• Strong understanding of OOP
• Good knowledge of design patterns and SOLID principles
• Good knowledge of async programming and concurrency patterns
• Good understanding of web protocols and security (HTTP, TLS, OAuth 2.0)
• Familiarity with secure coding practices and OWASP Top 10
• Experience with writing and maintaining unit tests
• Experience with Azure DevOps / GIT
• Experience within the Fintech industry
• Highly proficient English
• Good interpersonal and teamwork skills
• Delivery-oriented with strong focus on results
• Experience with AI-assisted development tools (GitHub Copilot, agentic coding assistants) is a plus

*Please submit CV in English*

Benefits:
Please note that our benefits package differs by country and/or office location to align with local regulations and market practices.

Nuvei is an equal-opportunity employer that celebrates collaboration and innovation and is committed to developing a diverse and inclusive workplace. The team at Nuvei is comprised of a wealth of talent, skill, and ambition. We believe that employees are happiest when they’re empowered to be their true, authentic selves. So, please come as you are. We can’t wait to meet you.

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.