Senior Software Engineer, Portal

About Ditto: Ditto is redefining how data moves at the edge. Our mission is to make it seamless for developers to build resilient, real-time applications, regardless of network conditions. Whether you're in a stadium, airplane, or remote military base, Ditto's peer-to-peer sync engine ensures devices stay connected and data stays consistent, even without internet. With more than $145 million in funding and trusted by organizations like Chick-fil-A, Delta Airlines, and the U.S. military, Ditto powers mission-critical experiences across aviation, retail, travel, hospitality, defense, and more. As a globally distributed, fast-growing startup, we’re committed to building a diverse and inclusive team that reflects the wide range of perspectives needed to solve the world’s hardest connectivity problems. As a Senior Front End Engineer at Ditto, you own the experiences our customers interact with every day. You build polished, performant interfaces on top of a powerful edge-sync platform, and you work across the full stack to bring features to life — from the React and TypeScript front end down to the Rust services that power them. You partner closely with design and product to shape what we build and why, sweating the details of the customer's experience. Because the front end is where customers form their first and lasting impression of Ditto, you act as a strong advocate for user experience and quality, collaborating with backend, platform, and mobile engineers to ship cohesive products. This role suits a senior engineer who is comfortable setting technical and product direction, navigating ambiguity, and raising the bar for craft across the team. KEY RESPONSIBILITIES - Build polished, performant user interfaces: Design and ship high-quality, accessible web UIs in React, TypeScript, and modern CSS, with a relentless focus on performance, responsiveness, and craft. - Work across the full stack: You won't just be writing components in isolation. You will work end to end —