Senior Software Engineer,

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 diversity and inclusion, talented peers, comprehensive benefits and career development opportunities. Come make an impact on the communities we serve as you help us advance health equity on a global scale. Join us to start caring. connecting. growing together. At Optum, we use technology to improve health outcomes and make the healthcare system work better for everyone. Our engineering teams build scalable, secure, and reliable platforms that support millions of users, enable data‑driven decision making, and power critical business capabilities across Optum and UnitedHealth Group.

We are looking for a Full Stack Senior Software Engineer who is passionate about building high‑quality software, takes ownership of complex technical problems, and enjoys collaborating with cross‑functional teams to deliver meaningful business outcomes. As a Full Stack Senior Software Engineer, you will be a hands‑on technical contributor responsible for designing, building, and maintaining software solutions across the full development lifecycle for one of our Realtime Claim Processing Systems. You will work closely with product managers, architects, and fellow engineers to deliver maintainable, scalable, and high‑performing systems. This role requires solid engineering fundamentals, a quality‑first mindset, and the ability to independently own and deliver well‑defined components or services. You will also support team growth by mentoring junior engineers and contributing to engineering best practices, including evaluating new tools, techniques, and strategies and automating common tasks.

This is an opportunity to help improve healthcare for millions of individuals. Careers with Optum offer flexible work arrangements and individuals who live and work in the Republic of Ireland will have the opportunity to split their monthly work hours between our Dublin or Letterkenny office and telecommuting from a home‑based office in a hybrid work model.

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• Design, develop, test, deploy, and maintain high‑quality software solutions
  
• Own the delivery of complex features or services from design through production
  
• Build modular, scalable, secure, and reliable applications that meet business needs
  
• Contribute to technical design discussions and follow established architectural standards
  
• Write clean, well‑tested, and maintainable code (unit, integration, and contract tests)
  
• Implement and support APIs and microservices with solid contracts and documentation
  
• Add logging, monitoring, and instrumentation to ensure reliability and performance
  
• Troubleshoot production issues and participate in support and reliability activities as needed
  
• Collaborate with Product, Architecture, QA, and Operations teams
  
• Reduce technical debt and contribute to modernization and automation initiatives
  
• Actively participate in Agile ceremonies and continuous improvement efforts
  
• Mentor junior engineers through code reviews, pairing, and technical guidance
  
• Ensure solutions comply with enterprise security, privacy, and regulatory standards
  

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• Develop and deploy services on Microsoft Azure
  
• Build event‑driven and asynchronous integrations (e.g., Event Hubs, Kafka)
  
• Design and maintain RESTful/GraphQL APIs using Java and Spring Boot
  
• Work with modern data platforms such as Databricks, ADSL, and Snowflake
  
• Apply cloud‑native design principles for scalability, resiliency, and cost efficiency
  

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• Proven solid experience as a Senior Software Engineer (or equivalent)
  
• Proven hands‑on experience delivering production‑grade Java / Spring Boot and Python applications
  
• Proven experience working with React/Angular
  
• Demonstrated solid understanding of software design principles, patterns, and clean code practices
  
• Demonstrated solid understanding of GHA and CI/CD workflows with DevOps collaboration
  
• Demonstrated solid understanding or experience working with Test Automation tools and processes
  
• Proven solid experience working with Observability tools
  
• Proven experience working with cloud platforms and distributed systems
  
• Proven experience working with Mongo DB
  
• Proven experience working in Agile development teams
  
• Demonstrated ability to independently own technical work and deliver reliably
  
• Proven experience mentoring junior engineers and contributing to team engineering standards
  
• Demonstrated solid problem‑solving skills and attention to quality
  

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• Proven experience in healthcare, data‑intensive, or regulated environments
  
• Proven familiarity with large‑scale enterprise platforms
  

Please note you must currently be eligible to work and remain indefinitely without any restrictions in the country to which you are making an application. Proof will be required to support your application. xcfaprz

Diversity creates a healthier atmosphere: Optum is an Equal Employment Opportunity employer and all qualified applicants will receive consideration for employment without regard to gender, civil status, family status, sexual orientation, disability, religion, age, race, and membership of the Traveller community, or any other characteristic protected by law. Optum is a drug‑free workplace.