Systems Engineer (Contract, Brazil)

Very strong systems engineering ability: writing modular, maintainable code within a complex codebase where correctness and performance are critical. Experience with Rust (or C++/Go with strong performance focus). Understanding of high-performance or distributed systems (e.g., low-latency engines, runtimes, databases, OS-level concurrency). Ability to think in terms of execution flows, concurrency models, resource lifecycles, and system invariants. Interest in performance optimization and low-level profiling (CPU, memory, synchronization overhead). Strong first-principles thinker with excellent problem-solving skills, attention to detail, and communication ability. Excellent communication skills in business English (spoken and written).

Design, implement, and optimize high-performance components in Rust, C++, or Go for Nexus’s DEX engine and protocol runtime. Design, implement, and optimize all layers of the Nexus protocol stack, including consensus, execution, and API/RPC servers. Build low-latency pipelines for order execution, event propagation, and state updates. Design and implement financial and trading primitives on the Nexus L. Optimize concurrency, scheduling, memory layout, and I/O paths for determinism and throughput. Contribute to the evolution of execution abstractions that may be enshrined at the protocol layer. Work with protocol engineers to ensure safety, composability, and consensus compatibility. Investigate and resolve performance bottlenecks using profiling, tracing, and benchmarking techniques. Help define standards for reliability, correctness, and high-assurance distributed execution. For senior/principal candidates: drive system design decisions, shape execution architecture, and mentor others in performance engineering.