• Architect, design, develop, and maintain complex full-stack software systems and APIs spanning multiple technology domains and data stores. • Build and iterate on new products primarily in JavaScript and TypeScript, leveraging Node.js for server-side development and Next.js and React for modern web application delivery. • Develop backend services in Java and Python and work with SQL and MongoDB for data persistence. • Design and implement software that integrates with or operates adjacent to AI models and AI-powered workflows. • Identify cross-cutting concerns within and across service boundaries and implement reusable, well-structured solutions. • Consistently apply sound software design principles — SOLID, clean architecture, appropriate patterns — to implement business functionality at scale. • Apply security-first design principles across the stack, including proper secrets management, input validation, authentication and authorization patterns, and defense-in-depth strategies. • Establish technical design and develop solutions following development standards and quality processes. • Lead story breakdowns, grooming sessions, and feature-level architecture and design discussions. • Drive measurable improvement in unit test coverage, code quality, and overall engineering health of the codebase. • Perform thorough PR reviews and provide technical guidance and mentorship to team members.