Quant Developer

Quant Developer (Digital Assets) Location: London, England, United Kingdom About the Role We are seeking a DeFi Quantitative Developer with strong engineering skills to join our London-based team. This role combines deep experience in DeFi markets and on‑chain analytics with the ability to adapt and extend backtesting systems for DeFi, and to ideate scalable strategies. Key Responsibilities Research and develop yield‑generating strategies across DeFi protocols (staking, LPs, lending, re‑staking, etc.) Extract, clean, and analyze on‑chain data to identify inefficiencies, arbitrage opportunities, and risk‑adjusted return profiles. Design and execute robust backtests to validate strategy performance. Work with existing research frameworks to integrate DeFi‑specific functionality. Extend and optimize components for on‑chain analysis, risk management, and simulated connectivity to decentralized venues. Implement enhancements in Rust and Python for performance, reliability, and security. Develop metrics and dashboards to monitor strategy performance and market conditions. Troubleshoot unexpected behaviors and refine strategies based on real‑time feedback. Continuously iterate on models and assumptions to adapt to evolving DeFi ecosystems. Work closely with the Head of Quant Strategies and present research findings and performance metrics to internal stakeholders. Contribute to thought leadership and internal knowledge sharing on DeFi trends and innovations. The Expertise and Skills You Bring Technical Expertise Strong proficiency in a systems language such as C++/Rust. Advanced skills in Python, relational databases, and SQL/Snowflake. Experience working with blockchain data (e.g., The Graph, Dune, custom node queries) and trading platforms. Strong understanding of portfolio construction, risk modeling, and statistical analysis. DeFi & Market Knowledge Deep experience with DeFi protocols, protocol mechanics, and smart contracts. Understanding of liquidity provisioning, staking, lending, and governance mechanisms. Experience with systematic trading or investment strategies in digital assets. Analytical & Research Skills Ability to design statistically sound experiments and backtests. Skilled at extracting signal from noisy, imperfect data sets. Structured approach to hypothesis generation, model building, and validation. Professional Experience Typically, 5+ years of experience in quantitative development/research. Prefer 2+ years of experience in digital assets and/or DeFi. Advanced degree (MSc or PhD) in a quantitative discipline (e.g., Mathematics, Computer Science, Physics, Statistics). Experience working in a collaborative, cross‑functional environment. Preferred Qualifications Prior experience adapting or extending trading systems. Familiarity with MEV, gas optimization, and Layer 2 scaling solutions. Experience with trading infrastructure and execution in decentralized markets. Demonstrated initiative in research, strategy development, and process improvement. Fidelity Digital Assets® is dedicated to building products and services that help institutions adopt digital assets and innovate within the increasingly digital world of finance. Fidelity Investments began researching blockchain technology and digital assets solutions in 2014, and years of research and development have provided us with the deep expertise necessary to build the future of finance. Come join the Quantitative Strategies team within Fidelity Digital Assets® to help grow our business initiatives within DeFi and contribute to our research and product capabilities using your insights. #J-18808-Ljbffr