Build user experiences with React or Angular; contribute to Flutter/Swift as needed. Develop Java 17+ / Spring Boot services; design clean REST/GraphQL integrations. Implement WCAG 2.1 accessibility and optimize Core Web Vitals & SEO. Integrate with Client SSO/MFA via OAuth2/OIDC/SAML; handle tokens/sessions securely. Write unit/integration/E2E tests; maintain CI/CD quality gates; participate in code reviews. Contribute to observability and secure coding; support app-store readiness for mobile. 5-8 years in production web/mobile; recent Java + TypeScript experience. Strong React/Angular and Spring Boot; API design and integration at scale. Track record improving performance (CWV) and accessibility (WCAG 2.1). Proficient with Git, CI/CD, Docker, and basic Kubernetes. Explicit communication and mentoring mindset."