Sr. Software Engineer II

Responsibilities

• 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.

Requirements

• 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.
• Able 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.