Senior Software Engineer, Bluetooth

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.

We’re seeking an experienced Senior Software Engineer, Bluetooth to own and advance the Bluetooth transport layer that powers Ditto’s distributed data platform. You’ll be responsible for designing, developing, and optimizing the software that enables reliable, low‑latency peer‑to‑peer communication between devices—even when they’re completely offline. Your work will directly impact millions of data sync operations happening across our customers’ distributed systems.

• Design and implement robust Bluetooth Low Energy (BLE) solutions in C++/C/Kotlin for iOS and Android platforms. Handle complex connection states, manage central and peripheral roles, and ensure low‑latency, high‑throughput performance.
• Implement new Bluetooth profiles and features that expand Ditto’s connectivity options. Work on advertising strategies, scanning optimization, and connection management to maximize device discovery and pairing success across diverse environments.
• Build sophisticated error handling and recovery mechanisms that gracefully manage Bluetooth’s inherent unreliability. Handle edge cases, interference patterns, and device‑model quirks in production.
• Tune performance across multiple dimensions—latency, throughput, connection stability, and power efficiency—by profiling code, identifying bottlenecks, and making architectural decisions that balance competing constraints.
• Develop automated testing frameworks (primarily Python‑based) that validate Bluetooth performance across diverse device types, OS versions, and real‑world scenarios. Build tools that provide confidence in every release.
• Collaborate closely with mobile app developers, platform engineers, and product teams to integrate Bluetooth seamlessly with other transport layers (Wi‑Fi Direct, LAN) and ensure a unified sync experience.

• 7+ years of software engineering experience with at least 3–4 years focused on Bluetooth development.
• Deep expertise in Bluetooth Low Energy (BLE) protocols, profiles, and the Bluetooth Core Specification.
• Strong proficiency in C++/C and experience with mobile development in Kotlin (Android) and/or Swift/Objective‑C (iOS).
• Experience with Rust or strong willingness to learn and work in a Rust environment.
• Proven track record of shipping production Bluetooth features in mobile applications.
• Experience debugging complex connectivity issues across diverse device ecosystems.
• Strong understanding of networking fundamentals, state machines, and asynchronous programming.
• Ability to write clean, maintainable code with comprehensive test coverage.

• Production experience with Rust in systems programming or networking contexts.
• Experience with Bluetooth Mesh or other mesh networking protocols.
• Background in distributed systems or peer‑to‑peer networking.
• Familiarity with other local transport protocols (Wi‑Fi Direct, NFC, etc.).
• Python scripting for test automation and tooling.
• Experience with performance profiling and optimization on mobile platforms.
• Open source contributions to Bluetooth‑related projects.
• Knowledge of embedded systems or IoT device development.

We offer competitive salaries and meaningful equity. Benefits vary by region to ensure coverage in the areas that matter most. In the U.S., that includes health, dental, vision, life, and disability insurance, a 401(k) and flexible…