Senior Software Engineer, Networking

This is a fully remote position, open to applicants in California, +1 more state.

📋 Description

• Design, implement, and take ownership of essential components within Ditto’s networking and transport stack.

• Collaborate on overlay networking, routing, virtual connections, channel lifecycle, and various physical transports/protocols such as BLE, LAN, Wi-Fi Aware, and AWDL.

• Re-architect the networking stack to create a modular, scalable, and high-performance design.

• Define clear interfaces and ownership boundaries between transport layers and mesh abstractions.

• Troubleshoot and enhance connectivity issues related to data transfer reliability, MTU negotiation, pairing instability, throughput limitations, and cross-platform synchronization.

• Develop and refine transport mechanisms for flow control, backpressure, congestion management, retries, connection lifecycle administration, and failure recovery.

• Identify and eliminate performance bottlenecks concerning latency, memory usage, CPU consumption, and tail behavior.

• Design protocol state machines, wire formats, and transport abstractions suitable for unreliable networks and constrained environments.

• Establish observability through logging, metrics, and diagnostics for production debugging and root-cause analysis.

• Contribute to Ditto’s vision of enabling resilient, real-time applications through peer-to-peer synchronization at the edge.

• Engage in a distributed, asynchronous team environment.

⛳️ Requirements

• Over 5 years of professional experience in systems software development, with a minimum of 3 years dedicated to networking, transport protocols, or routing.

• Strong expertise in Rust or C++.

• Familiarity with ownership and borrowing semantics, async runtimes, concurrency primitives, and profiling/optimization methods.

• Understanding of TCP, UDP, and QUIC semantics and trade-offs, including connection establishment, congestion and flow control, retransmission behavior, MTU/fragmentation, latency, throughput, and reliability.

• Experience with networked services and protocols.

• Ability to troubleshoot complex behaviors in networked and concurrent systems, including race conditions, deadlocks, resource leaks, and latency spikes.

• Experience in designing modular APIs and abstractions that can scale across various implementations and evolve safely over time.

• Excellent written and verbal communication skills suited for a distributed, asynchronous team environment.

• Enthusiasm for learning new networking technologies, APIs, and methodologies.

• Preferred: experience with mesh networking protocols, routing algorithms, or gossip protocols.

• Preferred: understanding of mobile platform constraints, background execution models, battery optimization, and OS suspension/resume cycles.

• Preferred: experience with Apple Core Bluetooth or Android WiFi Aware APIs.

• Preferred: experience with Linux networking, sockets, async I/O, or low-level systems programming.

• Preferred: openness to travel once per quarter for in-person team gatherings.

• Required work authorization for employment in the United States.

🏝️ Benefits

• Competitive salaries.

• Meaningful equity.

• Comprehensive US health, dental, vision, life, and disability insurance.

• 401(k) plan.

• Flexible spending accounts.

• Flexible time off policy.

• Remote work opportunities.

• Optional access to the Atlanta office for work or team meetings.

• Willingness to travel once per quarter for in-person team gatherings is considered a plus.