Senior Software Engineer Jobs in Westminster, CA

At WelbeHealth, we serve our communities' most vulnerable seniors through shared intention, pioneering spirit, and the courage to love. These core values and our participant-focus lead the way no matter what.

Under the supervision of Architecture and Development Management, the Senior Software Engineer is accountable for working with business stakeholders, solution architects, data architects, and the Information Technology and Services (IT&S) department to identify and define business needs that require developed technology solutions. The Senior Software Engineer is accountable for the development, quality assurance, implementation, and maintenance of solutions components that fulfill prioritized business use cases. This role leverages the agile life cycle for solutions deployment in all projects, as well as objectively assesses quality and logistics production readiness. The Software Engineer regularly and directly collaborates with Solutions Architecture, Security Service, Application Management, Infrastructure Management, and Customer Service teams.

This role is different because the Senior Software Engineer at WelbeHealth:

• Combines hands-on software engineering with the opportunity to modernize and scale technology within a growing healthcare organization
• Takes on a collaborative engineering role with end-to-end ownership across the software development lifecycle, from requirements discovery and architecture/design through development, automated testing, deployment, monitoring, troubleshooting, and ongoing optimization

We care about our team members. That's why we offer:

• Medical insurance coverage (Medical, Dental, Vision)
• Work/life balance - We mean it! 17 days of personal time off (PTO), 12 holidays observed annually, and 6 sick days
• 401K savings + match
• Comprehensive compensation package including base pay and bonus
• And additional benefits!

On the day-to-day, you will:

• Adhere to WelbeHealth Agile DevOps processes, tools, and environments for requirements capture, architecture and design, construction, quality assurance, code, and documentation version control, production deployment, troubleshooting, and change management
• Build with AI as part of your default toolkit — using AI-assisted coding and agentic development tools to move faster on scaffolding, refactoring, test generation, and legacy code comprehension, while owning the review discipline that keeps generated code secure, correct, and maintainable
• Help shape how engineering works with AI at WelbeHealth — establishing prompting and context practices, code review standards for AI-generated work, and evaluation approaches for AI-backed features, including the guardrails required for PHI and HIPAA compliance
• Ensure the features provide the security and data integrity required to meet overall department goals toward PCI and HIPAA compliance, as well as participate in requirements discovery and usability sessions with end users, along with product owners and usability designers
• Ensure unit testing, functional testing, and automated testing coverage of features prior to launch, as well as perform peer coding and design reviews with peer developers
• Develop design patterns and standards, as well as re-write and re-engineer custom legacy applications using Microsoft tech stack
• Create documentation about both the current state of software as well as historical accounts of the process
• Participate in refactoring or new technology efforts, including research and communication of new design patterns for adoption by the team
• Provide ongoing support, maintenance, and enhancements of solutions including monitoring, performance optimization, and troubleshooting per production DevOps procedures

Job requirements include:

• Bachelor's degree in computer science, mathematics, or equivalent experience; relevant professional experience may be substituted
• One (1) or more Microsoft solutions certifications preferred in solutions architecture
• Minimum of ten (10) years of experience in object-oriented software development and maintenance using any programming language like C#, .Net Core, Razor Pages; experience with React.js UI
• Experience with NoSQL database namely Azure Cosmos DB; experience with REST APIs; experience with Azure Cloud.
• Understanding of how to implement solutions with multiple data sources
• Experience with Azure API Apps, Azure Logic apps, Azure Functions, and REST services
• Experience writing manual/automated test cases using NUnit
• Understanding of Azure Data Factory is a plus
• Understanding of Release Management principles with experience working in a strong structured environment of managing release levels and deployments preferred

We are looking for a highly experienced, hands-on Senior Software Engineer who brings deep expertise in object-oriented development, Microsoft technologies, Azure cloud services, APIs, modern application design, and automated testing. The ideal candidate will thrive in a fast-paced and evolving healthcare technology environment, have the technical depth to solve complex engineering challenges, and the collaboration skills to work effectively across architecture, security, infrastructure, product, and business teams. This role will play an important role in modernizing our technology ecosystem, improving the reliability and scalability of our applications, and building solutions that can grow alongside WelbeHealth while maintaining strong standards for security, data integrity, quality, and performance. If you're ready to join a team that values both its participants and team members, we'd love to hear from you!