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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Sr. Software Engineer II - **Company:** Waystar, Inc - **Location:** Louisville, KY, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** .NET Framework, Agile Methodology, ASC X12 Standards, Application Performance Management, Automation of Tests, BigQuery, Health Informatics, C Sharp (Programming Language), Code Review, Continuous Integration, Data Structures, Software Debugging, Distributed Systems, Github, Microsoft SQL Server, Object-Oriented Software Development, Performance Tuning, Query Optimization, RabbitMQ, Redis, Distributed Caching, Azure DevOps Pipelines, Software Engineering, SQL Stored Procedures, Software Organization, Data Logging, Test-Driven Development (TDD), Fast Healthcare Interoperability Resources, Snowflake, Grafana, Reliability of Systems, Git, Containerization, Solid Principles, Kubernetes, Information Technology, Health Level Seven International, Splunk, Software Version Control, Docker, Microservices - **Published:** July 22, 2026 - **Apply:** https://dejobs.org/x/x/3658119FFEA448C48674C202A481A4FA/job/ ## About the Role * 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. ## Description 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., * 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. ## Related Videos - [Navigating the Corporate Jungle: Life as a Developer in a large Company](https://www.wearedevelopers.com/videos/621-navigating-the-corporate-jungle-life-as-a-developer-in-a-large-company) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Reducing LLM Calls with Vector Search Patterns - Raphael De Lio (Redis)](https://www.wearedevelopers.com/videos/1714-reducing-llm-calls-with-vector-search-patterns-raphael-de-lio-redis) - [Docker Compose: Rediscovered](https://www.wearedevelopers.com/videos/1978-docker-compose-rediscovered) - [Migrating half a million users to a new payment service provider](https://www.wearedevelopers.com/videos/730-migrating-half-a-million-users-to-a-new-payment-service-provider) - [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews) ## Related Articles - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [The Best X (Twitter) Accounts for Developers](https://www.wearedevelopers.com/magazine/294-the-best-x-twitter-accounts-for-developers) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [Fullstack Developer Salary UK](https://www.wearedevelopers.com/magazine/251-fullstack-developer-salary-uk)