Lead Software Engineer (React / TypeScript) – Contract to Hire – Hybrid in Los Angeles Optomi, in partnership with one of the largest entertainment companies in the world, is seeking a Lead Software Engineer to help build and evolve core user experiences for streaming platforms. This role sits within an eCommerce team focused on building seamless sign-up, purchase, and subscription management flows that power billions of user interactions. You’ll serve as a hands-on technical leader, architecting scalable and accessible applications in React and TypeScript while mentoring engineers and shaping best practices across the team. What the right professional will enjoy: Impacting millions of users across the globe through your work on high-availability systems Collaborating on products at the intersection of entertainment, sports, and technology The chance to influence architecture and engineering standards at scale Working alongside deeply experienced engineers on an inclusive and knowledge-sharing team Experience of the right candidate: BS in Computer Science or STEM subject 7 years building and scaling performant web applications serving millions of users Expert-level knowledge in JavaScript, TypeScript, and React Proven ability to ship production-level React/Node.js apps with high availability on AWS Experience with test-driven development, CI/CD practices, and production-grade deployment Preferred qualifications: Deep understanding of web accessibility fundamentals and standards Experience with distributed systems, event-driven architectures, and performance tuning Environment: React, TypeScript, Node.js, JavaScript, AWS, Cypress, Playwright, GitHub Actions, CI/CD, Web Accessibility We’re putting a high emphasis on: Leading React UI development and shaping the platform’s web architecture Mentoring and collaborating with engineers to elevate technical execution Improving developer experience through tooling, documentation, and scalable design systems