Remote Senior Systems Engineer: Blockchain Execution Engine

Nexus Labs; United States; Remote; USD 150,000 - 225,000; Full time

Job summary

Nexus Labs is hiring Sr Systems Engineers to work on the core execution stack behind our Layer 1 protocol and the high-performance engine powering decentralized trading. This role emphasizes building performance-critical components where microseconds matter, and shaping protocol primitives for a global execution layer.

You will collaborate with protocol, cryptography, and product teams in San Francisco while contributing remotely from Argentina, focusing on low-latency pipelines, concurrency,

Qualifications

• Strong experience with Rust, C++, Go, or other systems programming languages.
• Understanding of high-performance or distributed systems (low-latency engines, runtimes, databases, OS-level concurrency).
• Ability to think in terms of execution flows, concurrency models, resource lifecycles, and system invariants.
• Practical experience profiling CPU, memory, and synchronization overhead.
• Comfort working close to runtime constraints where performance, determinism, and resilience are critical.
• Excellent communication skills in Business English (spoken and written).

Responsibilities

• Design and implement high-performance components in Rust, C++, or Go for Nexus's DEX engine and protocol runtime.
• Build low-latency pipelines for order execution, event propagation, and state updates.
• 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.

Skills

Rust

C++

Go

Systems programming

Low-latency

Job description

Nexus Labs is hiring Sr Systems Engineers to work on the core execution stack behind our Layer 1 protocol and the high-performance engine powering decentralized trading. This role emphasizes building performance-critical components where microseconds matter, and shaping protocol primitives for a global execution layer.

You will collaborate with protocol, cryptography, and product teams in San Francisco while contributing remotely from Argentina, focusing on low-latency pipelines, concurrency,