About Nexus
Nexus is building the foundation for verifiable finance, an economic system where every transaction, order, and settlement can be proven on-chain with cryptographic assurance. To do this we’re developing a DEX Layer 1 blockchain purpose-built for the AI economy, powered by idle compute from millions of people around the world, and verified with zero-knowledge proofs. This is finance rebuilt for the future: verifiable, scalable, and open to all.
Nexus has raised $25M in Series A funding https://www.prnewswire.com/news-releases/nexus-closes-25m-series-a-to-enable-verifiable-computation-via-zero-knowledge-cryptography-302168070.html?ref=blog.nexus.xyz from Lightspeed, Pantera, Dragonfly, SV Angel, and more.
Location: Remote (Argentina)
Type: Contract
Duration: 12 months with potential for extension
THE ROLE
We’re hiring Blockchain Engineers in Latin America to work at the core of Nexus’s execution stack — contributing to the runtime behind our Layer 1 protocol and the high-performance engine that powers decentralized trading.
This is not a typical backend role. You’ll design, implement, and optimize all layers of the Nexus protocol stack — including consensus, execution, and API/RPC servers — while helping define new financial and trading primitives on the Nexus L1.
You’ll work on performance-critical systems where microseconds matter, building execution paths that may evolve into core protocol primitives. Whether you’re a strong mid-level engineer ready to grow into system ownership or a senior/principal engineer eager to architect high-throughput distributed systems, this role offers the opportunity to build software that runs at the heart of a global execution layer.
You’ll collaborate closely with protocol, cryptography, and product teams in San Francisco while contributing remotely from Argentina.
WHAT YOU’LL DO
- Design and implement high-performance execution components in Rust, C++, or Go for Nexus’s blockchain runtime and DEX engine.
- Build low-latency pipelines for transaction execution, order matching, event propagation, and state updates.
- Optimize concurrency models, scheduling, memory layout, and I/O paths for determinism and throughput.
- Contribute to execution abstractions that may become core blockchain protocol primitives.
- Work closely with protocol engineers to ensure safety, composability, and consensus compatibility.
- Investigate and resolve performance bottlenecks using profiling, tracing, and benchmarking tools.
- Help define engineering standards for correctness, reliability, and high-assurance execution.
- For senior/principal engineers: drive system design decisions, shape execution architecture, and mentor others in performance engineering.
WHAT WE’RE LOOKING FOR
- Strong experience with Rust, C++, Go, or other systems programming languages.
- Hands-on experience with blockchain protocols, execution layers, or runtimes (Layer 1 or Layer 2).
- Solid understanding of high-performance or distributed systems (e.g., low-latency engines, runtimes, databases).
- Ability to reason about 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).
BONUS POINTS
- Experience building matching engines, blockchain runtimes, databases, compilers, or HPC systems.
- Familiarity with lock-free concurrency, zero-copy data structures, or cache-aware design.
- Exposure to consensus systems, transaction ordering, or protocol-level execution.
- Background in correctness-focused engineering (formal verification, static analysis).
- Open-source contributions to systems-level or blockchain infrastructure projects.
WHY JOIN US
- Build the execution backbone of a Layer 1 blockchain and next-generation DEX engine.
- Work on systems where your optimizations translate directly into global performance gains.
- Grow from mid-level contributor to system owner — or drive execution architecture as a senior/principal.
- Shape primitives designed to last — correct, performant, and potentially enshrined at the protocol level.
- Join a high-performance engineering culture where ambition and deep technical work are expected.