Senior Software Engineer, Data Sync

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. Role Description We’re looking for a Senior Software Engineer to join Ditto’s Data Sync team, one of our core engineering teams, and help keep mission-critical work moving when connectivity disappears. Our technology lets edge devices access the data they need and share updates as connections come and go, so applications keep working when a device goes offline. In this role, you’ll help shape the foundation behind that experience. It’s a rare and deeply interesting challenge: making software dependable in a world that’s distributed, unpredictable, and often offline. Your work will help customers build applications that don’t have to wait for a connection to do what matters. You’ll be part of a core technical team changing what’s possible at the edge. What You’ll Be Up To… - Build reliable Rust systems — Design and deliver production-grade libraries and services, using async programming and concurrency to meet performance and reliability needs. - Develop decentralized sync capabilities — Design and build systems that keep data consistent across heterogeneous peers, applying CRDTs and techniques such as content addressing, deduplication, and Merkle trees.

- Improve mesh observability — Instrument metrics, logs, and traces to track data propagation, diagnose production issues, and improve bandwidth use, reliability, and self-healing. - Turn customer problems into product improvements — Work directly with customers to debug issues on their devices and translate what you learn into engineering changes. What Helps You Thrive… - Relevant technical toolkit — You’re comfortable building in Rust, writing asynchronous code, and using metrics and observability tools to understand system behavior. - Emotional intelligence and conflict resolution — You listen carefully, navigate disagreements constructively, and communicate clearly. - Passion for offline-first problem-solving — You’re energized by helping customers run mission-critical workloads on edge devices, even when they can’t rely on a connection to a central system. - Strong written communication — As part of an async, distributed team, you write clear design docs, RFCs, and code reviews for both technical and non-technical readers. - Curiosity about AI — You look for thoughtful ways to use AI for automation, ideation, or decision-making in your role. Great-to-Haves… - Prior hands-on experience with CRDTs, distributed systems, or offline-first data synchronization. - Experience building software or integrating with embedded databases or data sync platforms. - Basic networking knowledge: IPv4, TCP, UDP, Bluetooth Low Energy, mesh networking concepts. - Experience with property-based testing, model checking, or other lightweight verification techniques. - A track record of open-source contributions in relevant ecosystems. THE BENEFITS OF BUILDING WITH US We offer competitive salaries and meaningful equity. We believe everyone on the team should have a stake in what we’re building. Benefits vary by region to make sure you're covered in the ways that matter most.