Charles St. Louis is a Canadian developer, architect, and figure in the decentralized finance (DeFi) sector, also known by the alias "csl" ^[1]. He is noted for his contributions to protocol governance at MakerDAO, his leadership as CEO of the fixed-rate yield protocol Delv (formerly Element Finance), and his role as a DeFi Protocol Specialist at the Ethereum Foundation ^[2].

Education

Charles St. Louis earned a Bachelor of Science in Mathematics from Queen’s University, with academic focus spanning information theory, number theory, actuarial science, game theory, economics, and computer/data science. During their time at Queen’s, they participated in the Queen’s Rugby Football Club and were involved with the Queen’s Startup Summit, the Queen’s Venture Capital Club, and the Queen’s Economic Investment Council. They also completed the Harvard Business School Online HBX CORe Certificate (Honours), a 120–150 hour program covering business fundamentals through Business Analytics, Economics for Managers, and Financial Accounting. ^[5]

Career

St. Louis began his career in the cryptocurrency industry in 2018, with initial work in the security token space. He later became a Governance Architect at MakerDAO, where he contributed to the development of the DAI stablecoin system and was involved in shaping the protocol's decentralized governance framework ^{[2] [1]}.

From 2021 to 2025, St. Louis served as the Chief Executive Officer of Delv, the entity formerly known as Element Finance. Under his leadership, the project pioneered the development of protocols and products for fixed-rate yields within the DeFi ecosystem ^{[2] [1]}.

Role at the Ethereum Foundation

In February 2026, St. Louis joined the Ethereum Foundation (EF) as a DeFi Protocol Specialist, working within the foundation's App Relations team. His appointment was a central part of the EF's first-ever formalized strategy to provide dedicated support to the DeFi ecosystem. This strategic shift was widely reported in industry media, with some outlets describing it as the foundation "doubling down" on its commitment to DeFi and its core principles ^{[2] [3]}.

The new initiative was officially announced on February 23, 2026, through a blog post titled "The Ethereum Foundation's Commitment to DeFi," which St. Louis co-authored. In his role, he co-leads the DeFi-focused effort alongside DeFi Coordinator ivangbi, the co-founder of Gearbox Protocol. Media reports also associated St. Louis with the alias "DeFiPunk," highlighting his task of forming a new team to support protocol development ^{[2] [4]}.