Sr. Software Engineer II

About This Position

Design, develop, test, deploy, and maintain robust and scalable software applications and services on the Waystar Claims platform. You will work across C#/.NET microservices, event-driven messaging, cloud-native Kubernetes infrastructure, and SQL Server data tiers to deliver high-quality, high-performance healthcare revenue cycle solutions.

Responsibilities

WHAT YOU'LL DO

• Design, develop, test, deploy, and maintain robust and scalable software applications and services using C#/.NET.
• Collaborate with product owners, architects, and other stakeholders to translate business requirements into technical specifications and actionable development plans.
• Write clean, efficient, well-documented, and maintainable code adhering to Waystar's coding standards and best practices.
• Participate in code reviews, providing constructive feedback and ensuring high code quality.
• Troubleshoot and debug complex software issues, identifying root causes and implementing effective solutions.
• Contribute to the continuous improvement of Waystar's software development processes, tools, and infrastructure.
• Mentor junior engineers and share knowledge within the team, fostering a culture of learning and growth.
• Develop and maintain automated tests (unit, integration, and end-to-end) to ensure software reliability and stability.
• Monitor application performance using Splunk and other observability tools; identify bottlenecks and implement optimizations to enhance user experience.
• Stay current with emerging technologies and industry trends, evaluating and recommending new approaches and tools.
• Contribute to the architectural design of new features and systems, ensuring scalability, security, and maintainability.

What You'll Need

Required Qualifications

• Bachelor's or Master's degree in Computer Science, Software Engineering, or a related technical field.
• 7+ years of professional software development experience with a proven track record of delivering high-quality software.
• Expertise in C# and .NET (both .NET 8 and .NET Framework); strong understanding of the .NET ecosystem and CLR.
• Strong understanding of data structures, algorithms, and object-oriented and SOLID design principles.
• Experience with SQL Server — schema design, stored procedures, query optimization, and performance tuning.
• Experience designing and building microservices and distributed systems using asynchronous, message-based architectures (e.g., RabbitMQ).
• Solid understanding of software development best practices including Agile methodologies, CI/CD (Azure DevOps Pipelines), and test-driven development (TDD).
• Experience with containerization and container orchestration: Docker, Kubernetes, and Helm chart authoring and deployment.
• Familiarity with Git-based version control and GitHub pull request workflows.
• Excellent problem-solving, analytical, and critical thinking skills.
• Strong communication and interpersonal skills, with the ability to collaborate effectively with cross-functional teams.
• Ability to work independently and manage multiple priorities in a fast-paced environment.

Nice to Have

• Experience with Redis for distributed caching.
• Experience with Snowflake, Big Query, or similar cloud data warehouse technologies.
• Familiarity with structured logging and observability tools such as Splunk.
• Knowledge of X12 EDI healthcare transaction standards (837 claim submission, 835 remittance advice, 270/271 eligibility inquiry/response).
• Knowledge of healthcare IT standards (e.g., HL7, FHIR) or prior experience in the healthcare revenue cycle industry.

About Waystar

Through a smart platform and better experience, Waystar helps providers simplify healthcare payments and yield powerful results throughout the complete revenue cycle.

Waystar’s healthcare payments platform combines innovative, cloud-based technology, robust data, and unparalleled client support to streamline workflows and improve financials so providers can focus on what matters most: their patients and communities. Waystar is trusted by 1M+ providers, 1K+ hospitals and health systems, and is connected to over 5K commercial and Medicaid/Medicare payers. We are deeply committed to living out our organizational values: honesty; kindness; passion; curiosity; fanatical focus; best work, always; making it happen; and joyful, optimistic & fun.

Waystar products have won multiple Best in KLAS® or Category Leader awards since 2010 and earned multiple #1 rankings from Black Book™ surveys since 2012. The Waystar platform supports more than 500,000 providers, 1,000 health systems and hospitals, and 5,000 payers and health plans. For more information, visit waystar.com or follow @Waystar (https://twitter.com/Waystar) on Twitter.

WAYSTAR PERKS

• Competitive total rewards (base salary + bonus, if applicable)
• Customizable benefits package (3 medical plans with Health Saving Account company match)
• We offer generous paid time off for our non-exempt team members, starting with 3 weeks + 13 paid holidays, including 2 personal floating holidays. We also offer flexible time off for our exempt team members + 13 paid holidays
• Paid parental leave (including maternity + paternity leave)
• Education assistance opportunities and free LinkedIn Learning access
• Free mental health and family planning programs, including adoption assistance and fertility support
• 401(K) program with company match
• Pet insurance
• Employee resource groups

Waystar is proud to be an equal opportunity workplace. We celebrate, value, and support diversity and inclusion. Qualified applicants will receive consideration for employment without regard to race, color, religion, age, sex, national origin, disability status, genetics, marital status, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state, or local laws.

This applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation, and training.

Job Category: Technology/Engineering

Job Type: Full time

Req ID: R3132