Prediction Markets Quant Trader — High-Frequency Market Edge

Gravity Team Ltd; Greater London; Hybrid; GBP 120,000 - 190,000; Full time

Benefits offered by this job

Profit sharing

Learning budget

Free meals

Wellness programs

Transport allowance

Job summary

Gravity Team Ltd is a quantitative proprietary trading firm seeking a high-performance Prediction Markets Quant Trader to own the vertical across event contracts and forecasting. The role focuses on building and iterating high-frequency strategies for Kalshi, Polymarket, PredictIt, and other venues with global reach.

You will develop predictive models, manage arbitrage and market-making across 30+ exchanges, and optimize execution with shoulders on risk controls and edge extraction in evolving

Qualifications

• 5+ years in high-frequency or proprietary trading (crypto, prediction markets, sports betting, or traditional finance).
• Hands-on experience trading binary/categorical outcome contracts, options, or other probability-based instruments.
• Advanced proficiency in Python, applied statistics, and predictive/probabilistic modeling (e.g., calibration, Bayesian updating).
• Familiarity with Rust is a valuable advantage.
• Knowledge of event market structure, resolution mechanics, and price discovery across contracts.

Responsibilities

• Develop and iterate high-frequency and systematic trading strategies for prediction/event markets.
• Build and optimize predictive models and signals for pricing, execution, hedging, and post-trade analysis of event contracts.
• Execute and manage arbitrage trades across prediction market venues and related instruments.
• Own the prediction markets trading pipeline—from probability tracking to market making logic and deployment.
• Collaborate on improving cross-venue hedging and settlement logic across platforms.
• Analyze market microstructure, order book dynamics, and execution performance to improve Sharpe and reduce slippage.
• Help evolve asset allocation across 30+ exchanges and venues.
• Stay ahead of resolution criteria and rule nuances to identify mispricings and edges.

Skills

High-frequency trading

Proprietary trading

Python

Statistical modeling

Tools

Rust

Job description

Gravity Team Ltd is a quantitative proprietary trading firm seeking a high-performance Prediction Markets Quant Trader to own the vertical across event contracts and forecasting. The role focuses on building and iterating high-frequency strategies for Kalshi, Polymarket, PredictIt, and other venues with global reach.

You will develop predictive models, manage arbitrage and market-making across 30+ exchanges, and optimize execution with shoulders on risk controls and edge extraction in evolving