Senior Software Engineer

About Us

Zelis is modernizing the healthcare financial experience in the United States (U.S.) across payers, providers, and healthcare consumers. We serve more than 750 payers, including the top five national health plans, regional health plans, TPAs and millions of healthcare providers and consumers across our platform of solutions. Zelis sees across the system to identify, optimize, and solve problems holistically with technology built by healthcare experts – driving real, measurable results for clients.

At Zelis, AI is woven into the fabric of how we work. Every associate is expected - and empowered - to partner with AI to challenge the status quo, accelerate innovation, and amplify their impact. This is a place for builders with a growth mindset who act with agility, embrace change, and use modern technology to shape smarter solutions, exceptional experiences, and the future of our industry for our clients, customers, and our culture.

Why We Do What We Do

In the U.S., consumers, payers, and providers face significant challenges throughout the healthcare financial journey. Zelis helps streamline the process by offering solutions that improve transparency, efficiency, and communication among all parties involved. By addressing the obstacles that patients face in accessing care, navigating the intricacies of insurance claims, and the logistical challenges healthcare providers encounter with processing payments, Zelis aims to create a more seamless and effective healthcare financial system.

Zelis India plays a crucial role in this mission by supporting various initiatives that enhance the healthcare financial experience. The local team contributes to the development and implementation of innovative solutions, ensuring that technology and processes are optimized for efficiency and effectiveness. Beyond operational expertise, Zelis India cultivates a collaborative work culture, leadership development, and global exposure, creating a dynamic environment for professional growth. With hybrid work flexibility, comprehensive healthcare benefits, financial wellness programs, and cultural celebrations, we foster a holistic workplace experience. Additionally, the team plays a vital role in maintaining high standards of service delivery and contributes to Zelis’ award-winning culture.

Position Overview

Job Summary

We are looking for an experienced Senior Software Engineer – .NET to design, develop, and maintain scalable, secure, and high-performing applications. The ideal candidate will have strong hands-on expertise in C#, .NET/.NET Core, REST APIs, microservices, SQL, and modern cloud-based application development.

Key Responsibilities

• Design, develop, test, and maintain enterprise applications using C# and .NET/.NET Core.
• Develop scalable RESTful APIs and microservices following industry best practices.
• Participate in solution design, technical discussions, code reviews, and architecture decisions.
• Build reliable integrations between applications, databases, and third-party systems.
• Write clean, reusable, maintainable, and well-tested code.
• Troubleshoot application issues and perform root cause analysis for production problems.
• Optimize application performance, scalability, security, and reliability.
• Implement unit testing and automated testing to maintain high code quality.
• Work with SQL Server and write optimized queries, stored procedures, and database objects.
• Support CI/CD pipelines, source control, and automated deployments.
• Collaborate closely with Product Managers, Business Analysts, QA, DevOps, and other engineering teams.
• Mentor junior engineers and contribute to coding standards and engineering best practices.
• Participate in Agile/Scrum ceremonies and deliver features within committed timelines.

Required Skills

• 7+ years of software development experience, with strong hands-on expertise in the Microsoft technology stack.
• Strong programming experience with C# and .NET/.NET Core.
• Hands-on experience with ASP.NET Core, Web API, REST APIs, and Microservices.
• Strong understanding of Object-Oriented Programming (OOP), SOLID principles, design patterns, and clean coding practices.
• Experience with Entity Framework / Entity Framework Core.
• Strong experience with SQL Server, relational databases, and query optimization.
• Experience with Unit Testing frameworks such as NUnit, xUnit, or MSTest.
• Knowledge of Git, CI/CD pipelines, and modern software development practices.
• Experience working in Agile/Scrum development environments.
• Strong debugging, troubleshooting, problem-solving, and analytical skills.
• Good communication skills with the ability to collaborate across technical and business teams.

Good to Have

• Experience with Azure cloud services.
• Knowledge of Azure DevOps and CI/CD.
• Experience with Docker and Kubernetes.
• Exposure to messaging technologies such as Azure Service Bus, Kafka, or RabbitMQ.
• Experience with distributed systems and event-driven architectures.
• Knowledge of application security, authentication, and authorization using OAuth 2.0 / OpenID Connect / JWT.
• Experience working on high-volume transactional or payment applications is an added advantage.

Commitment to Diversity, Equity, Inclusion, and Belonging

At Zelis, we champion diversity, equity, inclusion, and belonging in all aspects of our operations. We embrace the power of diversity and create an environment where people can bring their authentic and best selves to work. We know that a sense of belonging is key not only to your success at Zelis, but also to your ability to bring your best each day.

Equal Employment Opportunity

Zelis is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

Accessibility Support

We are dedicated to ensuring our application process is accessible to all candidates. If you are a qualified individual with a disability and require reasonable accommodation with any part of the application and/or interview process, please email talentacquisition@zelis.com.