Quant Trader - NYC/London - DeFi

Selini Capital

13h•Hybrid

About The Position

Selini Capital is looking for a sharp, ambitious Quant Trader to join our DeFi trading team. In this role, you’ll help us push toward the #1 spot in on-chain trading by improving strategy performance, scaling automation, and deeply understanding what drives PnL in decentralized markets. You’ll work closely with both traders and developers, and you’ll have direct impact on production PnL from day one. You’ll be expected to: Research, design and improve DeFi trading strategies across multiple venues and protocols. Build models and simulations to understand market behaviour and execution outcomes. Develop automation and tools for strategy configuration, parameter fitting, and monitoring. Work with large-scale market dynamics where our own actions can move the market (game theory). Contribute Python code to shared research and production workflows. Continuously study competitors and market structure. You’ll Join a Market-Leading Team: You’ll be part of one of the leading teams in on-chain trading, operating at the frontier of DeFi markets. Small Team, Outsized Impact: We run an extremely lean team. That means every trader matters, and your work won’t disappear into layers of process or bureaucracy. DeFi Is a Rare Trading Environment: On-chain trading sits at the intersection of market microstructure, mechanism design, open intelligence, execution complexity, and strategy engineering. It’s one of the most intellectually rich places to trade. Elite Teammates: Our DeFi quant traders come from exceptional quantitative backgrounds — including top-tier physics PhDs, Harvard graduates, and IPhO silver medalists.

Requirements

1–5 years of professional experience in the trading industry
Strong Python background to operate independently on and contribute to a shared codebase and research environment
Demonstrated quantitative excellence, such as: Top academic performance in CS, math, physics, or engineering Olympiad success (e.g. IMO, IPhO, IOI) Internship or full-time experience at a highly selective tech company or fund
Ability to pick up new concepts quickly, take ownership, and communicate clearly

Nice To Haves

Familiarity or interest with DeFi: working with smart contracts, blockchain APIs, MEV, or Solana
Has shipped production code for trading strategies
Strong math or statistics foundation, especially around modeling or simulation

Responsibilities

Research, design and improve DeFi trading strategies across multiple venues and protocols.
Build models and simulations to understand market behaviour and execution outcomes.
Develop automation and tools for strategy configuration, parameter fitting, and monitoring.
Work with large-scale market dynamics where our own actions can move the market (game theory).
Contribute Python code to shared research and production workflows.
Continuously study competitors and market structure.