Senior Software Engineer (AWS / React)

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. As a Senior Software Engineer I in the Enterprise Security & Resiliency Office (ESRO), you'll join a talented platform engineering team focused on building secure, scalable, and developer-centric solutions. In this role, you'll design and develop AI-powered assistants, enterprise search infrastructure, and internal developer utilities that enable engineers across UnitedHealth Group to adopt secure-by-default practices and deliver high-quality software at scale. You'll collaborate closely with UX designers, product managers, and fellow engineers to build powerful, reusable systems that play a critical role in advancing the organization's strategy for secure cloud-native development and responsible generative AI adoption.

Design, build, and maintain full-stack tools and services that streamline developer workflows using React, Node.js, and Express

Develop intelligent assistants, enterprise search features, asset tracking capabilities, and internal utilities using generative AI, knowledge graphs, and platform APIs

Write secure, maintainable, and well-tested code focused on scalability, performance, and developer experience

Investigate and resolve bugs, conduct root cause analysis, and contribute to continuous improvement of platform reliability

Collaborate with product managers, UX designers, and engineers to define and deliver impactful features

Work closely with teams that manage Systems of Record to query, sanitize, and ingest data into platform knowledge graphs

Contribute to architectural decisions, shared frameworks, and coding standards that drive consistency and reuse

Support the adoption of platform tooling through clear documentation, technical support, and peer mentorship

Communicate effectively with both technical and non-technical stakeholders

Stay current with emerging technologies and industry trends to help evolve the platform's technical direction

Use data-driven thinking to uncover insights that enhance platform capabilities and improve enterprise security posture

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

Candidate should hold graduation degree in Computer Science, Engineering, or a related field, or equivalent experience

• 5+ years of experience delivering scalable software systems, with deep experience in full-stack development
• Experience building reusable UI components and scalable APIs using REST and GraphQL
• Hands-on experience with automated testing frameworks such as Jest, Playwright, or equivalent
• Experience delivering applications on cloud platforms such as AWS, Azure, or GCP
• Solid full-stack development experience using JS/TS, React, and Node.js
• Familiarity with writing high-performance SQL queries and working with both relational (e.g., PostgreSQL) and NoSQL (e.g., MongoDB) databases
• Familiarity with GitHub and modern DevOps workflows, including CI/CD pipelines and GitHub Actions
• Solid understanding of secure coding practices and modern application security principles
• Ability to work effectively in fast-paced, agile environments with globally distributed teams
• Comfortable navigating ambiguity, shifting priorities, and balancing quality with timely delivery
• Hands-on experience integrating large language models (LLMs) or generative AI into developer tools or enterprise platforms

Experience working with both MongoDB and PostgreSQL in production environments

Experience deploying and managing applications in containerized environments using Kubernetes (EKS, AKS)

Background in developer portals, internal platform engineering, or developer experience teams

Exposure to observability and error monitoring tools, as well as developer productivity analytics

The opportunity to shape platform engineering best practices at scale across a Fortune 5 enterprise

The opportunity to lead high-impact initiatives in AI, developer enablement, and platform extensibility

High visibility with platform leadership and the ability to influence how engineering teams build software across UHG

Working Model & Team Culture

Hybrid collaboration model with flexible overlap hours (7 AM - 11 AM Central Time) to engage with U.Agile, full-stack team focused on building reusable, scalable systems that serve thousands of engineers

At UnitedHealth Group, our mission is to help people live healthier lives and make the health system work better for everyone. 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.