Software Development Engineer Senior

3 days per week onsite in Holtsville, NY required

Pay: $73-$78/hour. W2 only. Sponsorship is not available for this position.

Duration: 6 months with extensions based on client need and performance.

Software Development Engineer Senior

• Rust programming
• MQTT
• Async/Await
• Tokio

We are seeking a Senior Software Engineer with deep experience in Rust to help design, build, and scale high-performance, asynchronous systems. In this role, you will work on distributed, event-driven services that rely on MQTT messaging and modern async runtimes such as Tokio
. You will play a key role in architectural decisions, performance optimization, and mentoring other engineers.

• Design, develop, and maintain robust, production-grade services written in Rust
• Build and optimize asynchronous, non-blocking systems using Async/Await
• Implement and manage MQTT-based messaging for real-time, distributed communication
• Leverage Tokio for concurrency, scheduling, and I/O-heavy workloads
• Collaborate with cross-functional teams to define system architecture and APIs
• Write clean, maintainable, and well-tested code with a focus on performance and safety
• Diagnose and resolve complex concurrency, networking, and performance issues
• Review code, mentor junior engineers, and promote best practices across the team

• Bachelor's degree with 4+ years of relevant experience is required.
• Strong professional experience with Rust in production environments
• Solid understanding of Async/Await patterns and asynchronous programming concepts
• Hands-on experience with the Tokio runtime and async ecosystems
• Experience working with MQTT brokers and client implementations
• Deep knowledge of concurrency, memory safety, and systems-level programming
• Familiarity with distributed systems and event-driven architectures
• Strong debugging, profiling, and performance optimization skills