Staff Engineer – Backend Systems (C# / Rust / AWS)

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

A Little About Us

Zelis is modernizing the healthcare financial experience for all by providing a connected platform that bridges the gaps and aligns interests across payers, providers, and healthcare consumers. This platform serves more than 750 payers, including the top 5 national health plans, BCBS insurers, regional health plans, TPAs and self-insured employers, and millions of healthcare providers and consumers. Zelis sees across the system to identify, optimize, and solve problems holistically with technology built by healthcare experts—driving real, measurable results for clients.

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

Zelis is seeking a Staff Software Engineer with deep expertise in C# and Rust to join our growing engineering team. This is an opportunity to work on sophisticated, high-impact systems that power our core platform, leveraging modern tools and cloud-native technologies in a collaborative, agile environment.

As a senior technical contributor, you'll help evolve and enhance a mature yet complex software ecosystem. You’ll mentor other engineers, shape architectural decisions, and bring features from concept to production—building reliable, scalable, and secure systems.

What You’ll Do

• Collaborate with cross-functional teams to design, build, and enhance platform capabilities

• Lead or support complex software development initiatives from ideation through deployment

• Contribute to and maintain applications written in C#, Rust, ASP.Net, and SQL/Postgres

• Participate in code reviews, enforce development best practices, and improve software quality

• Debug, optimize, and document mission-critical components

• Coordinate and execute production deployments

• Prototype and evaluate new technologies to drive continuous innovation

• Mentor junior engineers and serve as a key technical voice within the team

• Partner with product and business stakeholders to define requirements and translate them into engineering work

• Represent engineering perspectives in cross-functional discussions

Technologies You’ll Work With

• Languages: Rust, C#, SQL, ASP.Net

• Databases: Microsoft SQL Server, PostgreSQL

• Cloud & DevOps: AWS (SQS, Lambda, RDS, ElastiCache), CI/CD pipelines, GitHub

• Architecture: Object-Oriented and Functional Design, REST APIs

What You Bring

Required Qualifications

• 8+ years of hands-on software engineering experience

• Strong command of Rust, C#, and SQL

• Familiarity with PostgreSQL and ASP.Net frameworks

• Experience with cloud infrastructure (AWS, Azure, or GCP) and serverless architecture

• Ability to communicate architectural decisions effectively and work across teams

• Proficiency in Git-based workflows and collaborative development

Preferred Qualifications

• Experience with additional languages (C++, Python, Java, or Ruby)

• Familiarity with full-stack development and DevOps practices

• Exposure to Entity Framework and CI/CD pipelines

• Background in healthcare or other regulated industries

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.

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

TalentAcquisition@zelis.com

.

Disclaimer

We are an equal opportunity employer, and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, gender identity, national origin, disability status, protected veteran status, or any other characteristic protected by law.

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.