Intern Software Engineer

About Nexus

Nexus is building the financial layer for the AI era. Nexus is a company building a verifiable and financial future of the Internet. Nexus was founded at Stanford University, is backed with over $25M in Series A funding top Silicon Valley VCs such as Lightspeed, Dragonfly, Pantera, SV Angel. The team consists of engineering and scientific leaders in blockchain, cryptography and AI, and its headquartered in San Francisco.

Nexus Labs has released the Nexus Layer 1, Nexus zkVM, Nexus Network, Nexus OS, and more, which have jointly attracted over 2.5 million cumulative users, supplying computing power to one of the largest computer grids in the world. The mission of Nexus is to build an open, verifiable, economic Internet: one that empowers users and businesses with technological breakthroughs in the era of blockchain and AI.

The Role

As an extension of our SF-based Engineering team, we’re looking for frontend, backend and mobile engineers to help design, build, and optimize user-facing features for our next-generation web applications. You’ll work closely with our product, design, and backend teams to bring intuitive, performant, and accessible experiences to life. The ideal candidate is passionate about clean code, enjoys solving product and engineering challenges, and thrives in a fast-paced, remote-first environment.

Responsibilities

• Build seamless and secure frontend features and user experiences across web, mobile and CLI (e.g., TypeScript, Next.js, CSS, Rust, React, React Native, Swift, Kotlin).
• Translate Figma designs into pixel-perfect, accessible, and responsive interfaces
• Compile and integrate Rust-based zkVM components into web applications using WebAssembly.
• Maintain blockchain infrastructure components including RPC endpoints, explorers, and developer tooling.
• Write, test, and audit Solidity-based smart contracts adhering to security best practices.
• Iterate rapidly based on developer feedback and usage data to improve usability and performance across the ecosystem.
• Collaborate with external partners to expand and support the broader ecosystem.
• Optimize for performance, usability, and browser compatibility
• Participate in code reviews, architectural discussions, and continuous improvement initiatives
• Communicate clearly in a distributed team environment (Slack, Notion, GitHub, Linear)

Requirement: Must possess fluency in Business English (spoken and written)

You Might Be a Fit If You Have

• Experience building web applications in production
• Strong proficiency in JavaScript/TypeScript and React
• Comfort working with API layers, including authentication flows
• An eye for detail and care for UX, animations, and interaction design
• Familiarity with Git workflows and remote collaboration tools

Bonus Points

• Experience in Web3
• Experience with full-stack development (Node.js, PostgreSQL, Prisma)
• Experience at high-impact Silicon Valley companies (e.g. Stripe, OpenZeppelin, Carta), where excellence in product execution and engineering is the norm, or in startup or fast-moving product teams
• Familiarity with feature flagging, analytics, or A/B testing infrastructure

Why Join Us

• Work on high-impact, user-facing products in an ambitious startup environment
• Collaborate with experienced engineers and product builders
• Fast-moving projects and clear technical ownership

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