The Role
We are seeking a Quantitative Developer with strong engineering skills to join our London-based team. This role is ideal for a technically strong developer who combines deep experience in DeFi markets and on-chain analytics with the ability to adapt and extend backtesting systems for DeFi as well as ideate on scalable strategies.
You will work closely with quant researchers and analysts to build research infrastructure, design, test, and deploy strategies that capitalize on opportunities across decentralized markets.
Key Responsibilities
Strategy Research & Implementation
- 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
System Adaptation
- 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
Monitoring & Troubleshooting
- 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
Cross-Team Collaboration
- Work closely with the Head of Quant Strategies to align strategy development with business goals
- Present research findings and performance metrics to team and 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 etc.
- 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 datasets
- 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
The Team
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.
Certifications:Category:Information TechnologySkills Required
- Proficiency in a systems language such as C++ or Rust
- Advanced skills in Python
- Experience with relational databases and SQL/Snowflake
- Experience working with blockchain data (The Graph, Dune, custom node queries) and trading platforms
- Strong understanding of portfolio construction, risk modeling, and statistical analysis
- Ability to design statistically sound experiments and backtests
- 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 (Mathematics, Computer Science, Physics, Statistics)
- Experience working in a collaborative, cross-functional environment
- 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 Investments Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Fidelity Investments and has not been reviewed or approved by Fidelity Investments.
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Strong & Reliable Incentives — Bonuses, commissions, and profit-sharing are presented as generous and meaningful components of total compensation, with certain roles achieving high total earnings through multiple pay streams. Variable pay is consistently framed as a positive contributor beyond base salary.
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Retirement Support — A 401(k) match up to 7% alongside additional profit-sharing up to 10% materially enhances long-term compensation. These retirement features are highlighted as standout strengths of the overall package.
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Parental & Family Support — Generous paid parental leave (16 weeks maternity, 12 weeks parental), backup dependent care, and adoption assistance provide robust family support. Hybrid work and caregiving resources further ease family responsibilities.
Fidelity Investments Insights
What We Do
At Fidelity, our goal is to make financial expertise broadly accessible and effective in helping people live the lives they want. We do this by focusing on a diverse set of customers: - from 23 million people investing their life savings, to 20,000 businesses managing their employee benefits to 10,000 advisors needing innovative technology to invest their clients’ money. We offer investment management, retirement planning, portfolio guidance, brokerage, and many other financial products. Privately held for nearly 70 years, we’ve always believed by providing investors with access to the information and expertise, we can help them achieve better results. That’s been our approach- innovative yet personal, compassionate yet responsible, grounded by a tireless work ethic—it is the heart of the Fidelity way.
