About Nexus
Nexus is backed by leading investors, including Pantera, Lightspeed, Dragonfly, Faction, Blockchain Builders Fund, Alliance, and SVA, and works with more than 100 partners across the global finance and blockchain stack.
The Role
You’ll collaborate with backend, protocol, and frontend engineers in San Francisco while contributing remotely from Argentina, helping ship high-quality financial infrastructure at scale.
What You’ll Do
- Develop and maintain automated test suites for backend services written in Node.js and Rust
- Build integration and end-to-end tests covering trading flows, settlement logic, and on-chain verification
- Design test cases for APIs, data pipelines, and distributed system components
- Assist in implementing CI/CD pipelines to automate testing and deployment validation
- Write performance and regression tests to ensure reliability under high-load conditions
- Debug issues across services, reproduce bugs, and collaborate with engineers to resolve them
- Contribute to improving test coverage, observability, and quality standards across the codebase.
Develop and maintain automated test suites for backend services written in Node.js and Rust
Build integration and end-to-end tests covering trading flows, settlement logic, and on-chain verification
Design test cases for APIs, data pipelines, and distributed system components
Assist in implementing CI/CD pipelines to automate testing and deployment validation
Write performance and regression tests to ensure reliability under high-load conditions
Debug issues across services, reproduce bugs, and collaborate with engineers to resolve them
Contribute to improving test coverage, observability, and quality standards across the codebase.
What We’re Looking For
- 1–2 years of experience in software development or QA automation (internships or academic projects count)
- Experience writing automated tests using JavaScript/TypeScript, Rust, or similar languages
- Familiarity with testing frameworks (e.g., Jest, Mocha, Playwright, Cypress, or similar)
- Basic understanding of APIs, databases, and backend systems
- Strong problem-solving skills and attention to detail
- Excellent communication skills in Business English (spoken & written)
- Eagerness to learn about distributed systems, financial infrastructure, and blockchain technology.
1–2 years of experience in software development or QA automation (internships or academic projects count)
Experience writing automated tests using JavaScript/TypeScript, Rust, or similar languages
Familiarity with testing frameworks (e.g., Jest, Mocha, Playwright, Cypress, or similar)
Basic understanding of APIs, databases, and backend systems
Strong problem-solving skills and attention to detail
Excellent communication skills in Business English (spoken & written)
Eagerness to learn about distributed systems, financial infrastructure, and blockchain technology.
Bonus Points For
- Experience testing APIs or backend services.
- Exposure to CI/CD tools (GitHub Actions, Docker, etc.)
- Familiarity with blockchain fundamentals or smart contracts
- Understanding of performance testing concepts and tools
- Experience working in fast-paced startup environments
Experience testing APIs or backend services.
Exposure to CI/CD tools (GitHub Actions, Docker, etc.)
Familiarity with blockchain fundamentals or smart contracts
Understanding of performance testing concepts and tools
Experience working in fast-paced startup environments
Why Join Us
- Build the backend systems powering the Layer 1 for Verifiable Finance.
- Collaborate with experts across blockchain, AI, and financial infrastructure.
- Shape the foundation for a verifiable, transparent, global trading system.
- Thrive in a fast-moving, high-impact engineering environment.
Build the backend systems powering the Layer 1 for Verifiable Finance.
Collaborate with experts across blockchain, AI, and financial infrastructure.
Shape the foundation for a verifiable, transparent, global trading system.
Thrive in a fast-moving, high-impact engineering environment.