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Senior .NET Developer

00069957841

Work model: Hybrid

Work location: Sofia, Bulgaria

Duties and Accountabilities

The Senior .NET Developer will:

  • Design, develop, and maintain enterprise applications using Microsoft .NET technologies.
  • Lead the delivery of complex software features and system enhancements from concept through production deployment.
  • Perform detailed code reviews and establish development quality benchmarks.
  • Collaborate in technical design sessions and collaborate with architects, product owners, and business stakeholders.
  • Guide development teams in implementing scalable, secure, and maintainable solutions.
  • Design and implement integrations with enterprise systems, APIs, messaging platforms, and cloud services.
  • Drive adoption of engineering best practices, including automated testing, CI/CD, DevSecOps
  • Diagnose and resolve complex application, performance, and production issues.
  • Contribute to system modernization initiatives and technical roadmap planning.

Selection Criteria

Required Qualifications

  • Bachelor's or Master's degree in Computer Science, Software Engineering, or a related discipline.
  • Significant professional software development experience.
  • Demonstrated experience leading development teams and major technical initiatives.

Technical Competencies

  • Expert knowledge of C#, .NET 8+, ASP.NET Core, Web APIs, Entity Framework, and modern software architecture patterns.
  • Experience with Azure cloud services and cloud-native application development.
  • Experience with messaging technologies, distributed systems, and event-driven architectures.
  • Strong knowledge of relational databases, data modeling, and performance tuning.
  • Experience with Azure DevOps, Git, CI/CD pipelines, and automated testing frameworks.

Non-Functional Expertise

  • Deep understanding of scalability, reliability, resiliency, and fault-tolerant system design.
  • Strong knowledge of application security, identity management, and secure development practices.
  • Experience implementing monitoring, telemetry, observability, and operational support frameworks.
  • Experience designing highly available and maintainable systems capable of supporting large-scale business operations.

Leadership Competencies

  • Proven ability to work in distributed development teams and technical workstreams.
  • Strong mentoring and coaching skills.
  • Experience conducting solution and code reviews
  • Ability to communicate complex technical concepts to technical and non-technical stakeholders.
  • Demonstrated ownership and accountability for solution quality and successful delivery outcomes.

Preferred Qualifications

  • Experience delivering solutions in large international organizations.
  • Experience working within SAFe teams.
  • Microsoft Azure certifications.
  • Experience with enterprise integration platforms, APIs, and cloud-based architecture.
  • Strong analytical, problem-solving, and stakeholder engagement skills.
  • Experience supporting mission-critical production systems and driving continuous improvement initiatives.

What we offer:

• Extensive benefits package,
• Open-minded and multinational environment,
• Opportunity to be part of a global organization focused on development,
• Professional development and clear career path,
• Training & development opportunities including language courses.


If you are looking for another opportunity and are interested in the company, do not hesitate to apply online!

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We are an equal opportunity employer and value diversity at our company. We do not discriminate based on race, religion, color, national origin, sex, gender, gender expression, sexual orientation, age, marital status, veteran status, or disability status.

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About Cognizant: 
Cognizant (Nasdaq: CTSH) is an AI Builder and technology services provider, bridging the gap between AI investment and enterprise value by building full-stack AI solutions for our clients. Our deep industry, process and engineering expertise enables us to build an organization’s unique context into technology systems that amplify human potential, drive tangible outcomes and keep global enterprises ahead in a fast-changing world. See how at cognizant.ai or @cognizant.

Additional employment information
Compensation information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.

Applicants may be required to attend interviews in person or by video conference. In addition, candidates may be required to present their current state or government issued ID during each interview.

Cognizant is an equal opportunity employer. Your application and candidacy will not be considered based on race, color, sex, religion, creed, sexual orientation, gender identity, national origin, disability, genetic information, pregnancy, veteran status or any other characteristic protected by federal, state or local laws.

Benefits that help you thrive and grow

Our benefits program is built with you in mind—so you can enjoy a fulfilling, balanced and healthy life.

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Financial wellbeing

We regularly review market data to ensure compensation reflects the value you bring. Your benefits extend beyond pay and may include retirement plans, financial education, etc.

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Physical and mental health

We empower you to prioritize your wellbeing through paid time off, flexible working where possible, healthcare plans, counselling, our Mental Health Allyship program and more. 

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Your career, your way

With 350,000+ roles at Cognizant, you’ll have opportunities explore new technologies, industries and locations—and build the skills you need to grow your career.

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Real-world impact

Think about the biggest brands you rely on. Chances are, they rely on us to help strengthen their business. Here, you’ll turn bold ideas into solutions that improve lives everywhere.

Your path to Cognizant

Here’s what you can expect from our hiring process. Please keep in mind that it may vary by role and location. Explore our FAQs to learn more.

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Step 1: Apply to the right opportunity

Find an open role that matches your skills and career goals and show us why you’re the person for the job. Don’t see the right opportunity? Consider joining our Talent Community.

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Step 2: Connect with your recruiter

If one of our recruiters sees a fit, they’ll set up a short intro call to learn more about you and how your experiences and skills match the role.

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Step 3: Show off your skills

If you and our team would like to continue the process, you’ll interview with our hiring team. Some roles may also require technical assessments and/or client interviews.

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Step 4: Decision time

Our team will then review each candidates’ potential to succeed in the role. This step may take some time because we want to find the right fit for both you and us—but you can count on us to keep you updated.

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What I value most about working at Cognizant is the opportunity to innovate while delivering real business impact. My role allows me to combine strategy, technology, and collaboration across global teams, which makes every project meaningful. The support for continuous learning and innovation has been instrumental in my growth.
Beata Ogorzala Senior Event Manager
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Cognizant has one of the best learning ecosystems you can ask for. From sponsored certifications to training platforms to mentorship, we have all that we need to grow.
Debashish Mishra SAP MM Developer
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Cognizant offers me more than a job; it offers a community. We support each other, collaborate across borders and celebrate wins together. If you’re looking for a culture that values flexibility, diversity and growth, this is the place to be.
Laura Reynaud Lead Counsel
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When I first joined, I was quiet and hesitant to share my thoughts. The leadership programs and the mentoring I’ve received have helped me find my voice and grow as a leader.
Sujatha Gopalakrishnan Portfolio Delivery Lead
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I’ve had the chance to work on impactful projects and shadow colleagues, all while getting involved in internal initiatives. The world is your oyster at Cognizant—you just need to take advantage of it!
Lucas Hoffman Consultant

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