Software Engineer: Campus Intern & New Grad , NY - equity

Ellipsis Labs is a profitable, venture‑backed New York‑based startup building sustainable and efficient DeFi protocols on high‑throughput decentralized infrastructure. Our long‑term goal is to build a better financial system.

Our flagship product, Phoenix Perpetuals, brings professional‑grade perpetual futures to Solana. Building on our experience developing efficient markets, Ellipsis Labs also operates Sol Fi, a proprietary automated market maker that provides efficient liquidity for key trading pairs. Our foundational product, Phoenix Legacy, is a limit order book on the Solana blockchain that established our expertise in operating high‑performance markets. Combined, these products have facilitated over $285B in trading volume across Solana markets.

All roles are in the Ellipsis Labs office in New York City.

Ellipsis Labs is seeking a Software Engineer — Campus (Intern & New Grad) to join our team. As an early‑stage startup, we appreciate bright generalists who can iterate and ship quickly. In this role, you will:

• Build real product features and/or platform components across the stack, front end, back end, infra, or on‑chain, based on your skills and interest
• Own scoped projects end‑to‑end: problem definition → design → implementation → testing → deployment → monitoring
• Collaborate with design and engineering to deliver fast, reliable, and secure experiences
• Instrument and improve performance, reliability, and observability; write clear tests and documentation

Required

• Hands‑on experience building software (courses, personal projects, research, or internships) in one or more languages such as Type Script/JavaScript, Python, Rust, Java, C/C++; you write clear, tested code
• Solid CS fundamentals (data structures, algorithms, systems thinking) and familiarity with Git and basic debugging
• Ability to make informed trade‑offs with business context; high agency and a team‑first mindset
• Curiosity about DeFi/crypto (prior domain experience not required)

Preferred

• Experience in one or more areas: full‑stack web (React/Java script), backend APIs/services, infrastructure/Dev Ops (Docker, CI/CD, cloud), or on‑chain/low‑level systems
• Familiarity with blockchain technology (Solana a plus)
• Interest or experience in fintech/trading
• Rust or Type Script proficiency

This posting covers both Intern (10–12 weeks) and New Grad (full‑time) tracks. Indicate your preference when you apply.