Senior Infrastructure Software Engineer

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 from Lightspeed, Pantera, Dragonfly, SV Angel, and more.

Role Overview
We are headquartered in San Francisco, and this role will be an in-person, hybrid role with the rest of the Nexus team.
Nexus is seeking a Senior Infrastructure Software Engineer — with the potential to grow into a Tech Lead — to design and scale the core infrastructure powering our Layer 1 blockchain and its first core application: a high-performance DEX enshrined in the L1 protocol.

This role requires deep expertise in low-latency distributed systems and the ability to deliver secure, production-grade infrastructure for financial applications. You'll work closely with Product, Research, and Security to build a system that meets the performance, reliability, and fairness requirements of modern trading systems — in a decentralized context.

Responsibilities

• Architect and implement low-latency, high-throughput financial infrastructure for Nexus's Layer 1 and DEX.
• Own major roadmap milestones: public testnet → mainnet → institutional-grade performance.
• Optimize consensus and transaction pipelines for speed, determinism, and security.
• Collaborate with cryptography and protocol teams to integrate cutting-edge zero-knowledge proofs into production systems.
• Mentor mid-level engineers and establish engineering best practices for reliability, security, and observability.
• Ensure high availability and fault tolerance for mission-critical financial systems.

What Success Looks Like- Mainnet launch with enterprise-grade reliability and sub-second transaction finality.
- DEX achieves low-latency trade execution comparable to centralized systems while maintaining decentralization.
Engineering systems and tooling enable