Sr Systems Engineer

Sr Systems Engineer

Company: Nexus

Nexus is the engine for verifiable finance — a blockchain designed to natively embed the world’s financial system into one compounding system. Built to support every major financial market on a single global exchange, Nexus unifies infrastructure that has historically been fragmented across chains and intermediaries. Headquartered in San Francisco with a growing presence in Buenos Aires, the team includes engineers, cryptographers, and market builders.

Applicants must be located in Latin America.

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 become protocol primitives.
- Work with protocol engineers to ensure safety, composability, and consensus compatibility.
- Investigate and resolve performance bottlenecks using profiling, tracing, and benchmarking.
- (Senior/Principal) Drive system design decisions and mentor others in performance engineering.

Requirements:

- 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 reason about execution flows, concurrency models, resource lifecycles, and system invariants.
- Practical experience profiling CPU, memory, and synchronization overhead.
- Excellent communication skills in Business English (spoken and written).

Nice to have:

- Experience building matching engines, databases, compilers, blockchain runtimes, or HPC systems.
- Familiarity with lock-free concurrency, zero-copy data structures, or cache-aware design.
- Exposure to protocol engineering, consensus systems, or transaction ordering.
- Background in correctness-focused engineering (formal verification, static analysis).
- Open-source contributions to systems-level projects.

Stack:

Rust, C++, Go

Benefits:

- Build the execution backbone of a Layer 1 blockchain and next-generation DEX engine.
- Work on systems where optimizations translate directly into global performance gains.
- Opportunity to grow from mid-level contributor to system owner or drive execution architecture as a senior.
- Join a high-performance engineering culture; estimated compensation: $88k - $150k (estimated).

📩 Apply