Senior .Net Full Stack Software Engineer

At Zelis, we Get Stuff Done. So, let’s get to it!

A Little About Us

Zelis is modernizing the healthcare financial experience 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.

A Little About You

You bring a unique blend of personality and professional expertise to your work, inspiring others with your passion and dedication. Your career is a testament to your diverse experiences, community involvement, and the valuable lessons you've learned along the way. You are more than just your resume; you are a reflection of your achievements, the knowledge you've gained, and the personal interests that shape who you are.

Position Overview

We are seeking a Senior .NET Full Stack Software Engineer to design, build, and operate core backend and full-stack systems for our healthcare payments and AI-driven solutions. This role is ideal for an engineer with deep backend expertise who enjoys working across the stack and is passionate about building scalable, secure, and reliable solutions in the cloud.

What You’ll Do:

• Design, develop, test, deploy, and maintain high-quality backend services and supporting systems using .NET Core / .NET 8+.

• Lead the end-to-end development of payment processing, digital identity, and AI-powered solutions.

• Own services in production, including deployment, monitoring, performance, and operational health.

• Collaborate with product managers, designers, and cross-functional teams to translate requirements into technical solutions.

• Drive architectural decisions with a focus on scalability, reliability, security, and maintainability.

• Ensure compliance with PCI-DSS, HIPAA, and internal security standards.

• Improve development and delivery workflows, including CI/CD pipelines and infrastructure automation.

• Mentor engineers and provide technical leadership through design reviews, code reviews, and architectural guidance.

• Troubleshoot and resolve production issues and system bottlenecks.

What You’ll Bring to Zelis:

• Bachelor’s or Master's degree in Computer Science or a related technical field, or equivalent practical experience.

• 8+ years of professional software engineering experience, primarily focused on backend systems.

• Strong expertise in C#, .NET Core / .NET 8+, ASP.NET Core Web APIs & Microservices.

• Experience building and operating web-based services and APIs, especially for payment and digital identity solutions.

• Experience with SQL Server (complex queries, performance tuning) and cloud platforms (preferably AWS).

• Familiarity with Infrastructure as Code, CI/CD pipelines, and automated delivery processes.

• Proven ability to deliver reliable, maintainable software in production environments.

• Strong written and verbal communication skills.

• Collaborative mindset, positive attitude, and desire to continuously learn and improve.

Preferred / Nice-to-Have Qualifications:

• Experience with Angular, React, or similar frontend frameworks.

• Experience with containerization (Docker, Kubernetes), service-oriented architectures, or distributed systems.

• Exposure to observability tooling (logging, metrics, tracing).

• Experience using AI-assisted tools or developing AI-driven applications (e.g., chatbots).

• Experience with financial transactions, reconciliation, and reporting systems.

• AWS certifications

Technologies We Use:
C#, .NET Core / .NET 8+, ASP.NET Core, SQL Server, Azure (App Services, Functions, Service Bus, Storage, Key Vault), Angular, React, Docker, Kubernetes, Terraform, CI/CD tooling, AI/ML frameworks.

Please note at this time we are unable to proceed with candidates who require visa sponsorship now or in the future.

Location and Workplace Flexibility

We have offices in Atlanta GA, Boston MA, Morristown NJ, Plano TX, St. Louis MO, St. Petersburg FL, and Hyderabad, India. We foster a hybrid and remote friendly culture, and all our employee's work locations are based on the needs of the position and determined by the Leadership team. In-office work and activities, if applicable, vary based on the work and team objectives in accordance with Company policies.

Base Salary Range

$115,000.00 - $145,350.00

At Zelis we are committed to providing fair and equitable compensation packages. The base salary range allows us to make an offer that considers multiple individualized factors, including experience, education, qualifications, as well as job-related and industry-related knowledge and skills, etc. Base pay is just one part of our Total Rewards package, which may also include discretionary bonus plans, commissions, or other incentives depending on the role.

Zelis’ full-time associates are eligible for a highly competitive benefits package as well, which demonstrates our commitment to our employees’ health, well-being, and financial protection. The US-based benefits include a 401k plan with employer match, flexible paid time off, holidays, parental leaves, life and disability insurance, and health benefits including medical, dental, vision, and prescription drug coverage.

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.

We welcome applicants from all backgrounds and encourage you to apply even if you don’t meet 100% of the qualifications for the role. We believe in the value of diverse perspectives and experiences and are committed to building an inclusive workplace for all.

Accessibility Support 
We are dedicated to ensuring our application process is accessible to all candidates. If you are a qualified individual with a disability or a disabled veteran and require a reasonable accommodation with any part of the application and/or interview process, please email [email protected].

Disclaimer

The above statements are intended to describe the general nature and level of work being performed by people assigned to this classification. They are not to be construed as an exhaustive list of all responsibilities, duties, and skills required of personnel so classified. All personnel may be required to perform duties outside of their normal responsibilities, duties, and skills from time to time.