Senior Software Engineering Lead - .Net, C#

Optum is a global organization that delivers care, aided by technology to help millions of people live healthier lives. The work you do with our team will directly improve health outcomes by connecting people with the care, pharmacy benefits, data and resources they need to feel their best. Here, you will find a culture guided by inclusion, talented peers, comprehensive benefits and career development opportunities. Come make an impact on the communities we serve as you help us advance health optimization on a global scale. Join us to start Caring. Connecting. Growing together.

Primary Responsibilities

• System Analysis & Existing Codebase Understanding
  • Understand and analyze large, existing systems through code review, documentation, and instrumentation
  • Investigate system behavior to support bug fixes, enhancements, and preventative improvements
• Software Design & Feature Development
  • Design and implement new functionality within an existing architecture
  • Produce clear system designs, technical specifications, and impact analysis for enhancements
  • Refactor and modernize legacy components to improve reliability and reduce complexity
• Existing System Maintenance
  • Analyze, debug, and resolve complex production issues across distributed systems
  • Diagnose application, database, memory, and connectivity issues with a focus on long term stability and maintainability
• Performance Optimization
  • Identify and resolve application and database performance bottlenecks
  • Optimize SQL queries, indexes, execution plans, and data access patterns
  • Improve memory usage, garbage collection behavior, and object lifecycles in .NET/C++ applications
• Backend & API Development
  • Develop and maintain backend components using .NET Core, C#, and C++
  • Design, enhance, and consume REST and SOAP APIs
  • Integrate with databases and external systems in a secure and scalable manner
• Data & Database Expertise
  • Be able to perform schema design changes, query tuning, and database performance improvements
  • Ensure data integrity, scalability, and efficient storage usage
• Engineering Productivity & Modern Practices
  • Use tools such as Git, debugging/profiling tools, logging, and monitoring effectively
  • Leverage Copilot or similar tools to accelerate debugging, understand legacy code, and improve documentation
  • Collaborate effectively with cross functional teams and contribute to architectural discussions
• Comply with the terms and conditions of the employment contract, company policies and procedures, and any and all directives (such as, but not limited to, transfer and/or re-assignment to different work locations, change in teams and/or work shifts, policies in regards to flexibility of work benefits and/or work environment, alternative work arrangements, and other decisions that may arise due to the changing business environment). The Company may adopt, vary or rescind these policies and directives in its absolute discretion and without any limitation (implied or otherwise) on its ability to do so

Required Qualifications

• 6+ years of professional software engineering experience
• Solid experience with Oracle and SQL databases
• Knowledge of Languages & Frameworks
  • C# / .NET Core (primary)
  • RESTful API development and integration
  • Oracle (Solid SQL optimization skills)
  • Microsoft SQL Server
  • C++
  • Python
  • Experience creating mocks and test doubles
  • Solid understanding of GitHub workflows (CI/CD, build pipelines, deployments)
  • Proficiency with unit testing frameworks (NUnit or xUnit or pytest, etc.)
• Demonstrated ability to quickly learn complex systems and unfamiliar technologies
• Demonstrated solid troubleshooting, analytical, and diagnostic abilities
• Comfort working with both legacy and modern technology stacks
• Proven solid communication, documentation, and cross-team collaboration
• Proven curiosity and willingness to learn additional technologies quickly
• Proven ability to navigate ambiguity and make sound technical decisions
• Proven ability to work independently without needing a lot of hand-holding and technical support

Preferred Qualifications

• Agentic AI experience
• Familiarity in Pascal for legacy systems
• Knowledge of Prompt Engineering
• Knowledge of ReactJs and NodeJs
• Knowledge of SOAP services and WSDL-based integrations
• Knowledge of MySQL
• Knowledge of AWS
  • S3
  • EC2
  • Storage Gateway
  • DataSync
  • SQS
• Knowledge of Networking
  • Load balancing
  • Routing & DNS
  • Firewall rules
  • Hybrid network flows

At UnitedHealth Group, our mission is to help people live healthier lives and make the health system work better for everyone. We believe everyone–of every race, gender, sexuality, age, location and income–deserves the opportunity to live their healthiest life. Today, however, there are still far too many barriers to good health which are disproportionately experienced by people of color, historically marginalized groups and those with lower incomes. We are committed to mitigating our impact on the environment and enabling and delivering equitable care that addresses health disparities and improves health outcomes — an enterprise priority reflected in our mission.