• Design and implement scalable web applications using modern frameworks such as Ruby on Rails, React, Node/NestJS, and NextJS • Modernize existing applications to enhance user experience, performance, and long-term maintainability • Utilize, contribute to, and evolve reusable UI component libraries • Work closely with UX partners to design and ship intuitive, high-quality user experiences • Contribute to core platform capabilities that support multiple products (e.g., identity, authentication, APIs, shared services) • Help define and evolve backend architectures that enable scalability, reliability, and sustainable growth • Proactively identify and implement improvements to application performance, scalability, and maintainability • Design, build, and maintain backend services and RESTful APIs • Build or contribute to iOS and Android mobile applications using Expo / React Native, as applicable • Evaluate and implement AI-powered features where they create meaningful customer and business value • Stay current with emerging technologies and apply them thoughtfully to real-world problems • Partner with product managers to assess trade-offs, identify risks, and align technical solutions with business goals • Collaborate with engineers, designers, QA, DevOps, and cross-functional stakeholders to deliver outcomes—not just features • Support software deployments through debugging, troubleshooting, and coordination with DevOps and QA teams • Participate in Agile ceremonies including sprint planning, grooming, and retrospectives • Mentor and coach other engineers, sharing best practices and helping raise the technical bar across the team • Provide technical expertise in software architecture, design patterns, and maintainable system design.