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Ditto is redefining how data moves at the edge, enabling developers to build resilient, real-time applications regardless of network conditions. The company's peer-to-peer sync engine ensures devices stay connected and data remains consistent even without internet connectivity, serving mission-critical use cases across aviation, retail, travel, hospitality, and defense. With over $145 million in funding and customers including Chick-fil-A, Delta Airlines, and the U.S. military, Ditto is at the forefront of next-generation mesh networking.
As a Senior Software Engineer on the Networking team, you will design, implement, and own core components of Ditto's networking and transport stack, spanning overlay networking (routing, virtual connections, channel lifecycle) and underlying physical transports and protocols (BLE, LAN, Wi-Fi Aware, AWDL, etc.). You will drive the re-architecture of the networking stack toward a more modular, scalable, and high-performance design, establishing clear interfaces and ownership boundaries between transport layers and mesh abstractions.
Key responsibilities include debugging and systematically improving real-world connectivity issues such as data transfer reliability, MTU negotiation, pairing instability, throughput ceilings, and cross-platform data sync behavior. You will build and optimize transport mechanisms with explicit attention to flow control, backpressure, congestion handling, retries, connection lifecycle management, and failure recovery. You'll identify and eliminate performance bottlenecks across latency, memory footprint, CPU utilization, and tail behavior in highly concurrent, asynchronous systems.
You will design protocol state machines, wire formats, and transport abstractions that remain correct under unreliable networks, intermittent connectivity, and constrained environments. Additionally, you'll establish meaningful observability through targeted logging, metrics, and diagnostics to enable rapid production debugging and root-cause analysis. This role is ideal for engineers passionate about networking, distributed systems, and building low-level infrastructure that operates at scale and in constrained environments.
Ditto offers a globally distributed, remote-first environment with flexible scheduling. An Atlanta office is available for optional in-person collaboration. The company is committed to building a diverse and inclusive team.
REQUIREMENTS:
- 5+ years of professional experience building systems software, with at least 3 years focused on networking, transport protocols, or routing
- Strong proficiency in Rust or C++, including ownership and borrowing semantics, async runtimes, concurrency primitives, and profiling/optimization techniques
- Understanding of key mesh networking topics such as TCP, UDP, and QUIC semantics and tradeoffs, including connection establishment, congestion and flow control, retransmission behavior, MTU/fragmentation, and practical implications for latency, throughput, and reliability in real-world systems
- Exposure to or experience working with networked services and protocols; demonstrated ability to debug complex behavior in networked and concurrent systems (race conditions, deadlocks, resource leaks, latency spikes)
- Experience designing modular APIs and abstractions that scale across multiple implementations and evolve safely over time
- Clear written and verbal communication skills in a distributed, asynchronous team environment
- Passion to learn new networking technologies, APIs, and approaches to build at the bleeding edge of mesh networking
NICE TO HAVES:
- Experience with mesh networking protocols, routing algorithms, or gossip protocols
- Understanding of mobile platform constraints including background execution models, battery optimization, OS suspension/resume cycles, and their impact on persistent connections
- Experience with Apple Core Bluetooth or Android WiFi Aware APIs
- Experience with Linux networking, sockets, async I/O, or low-level systems programming
- Willingness to travel once per quarter for in-person team gatherings
