De-Fi Engineer

G‑20 Group is a cross‑asset trading firm based in Switzerland that operates delta‑one and derivatives markets worldwide, blending startup agility with institutional‑grade expertise in proprietary trading, technology and quantitative finance. The opening is for a De‑Fi Engineer who will join a tightly‑focused technology, mathematics and trading team to push blockchain‑driven innovation in financial markets. In this role the engineer will co‑design trading algorithms and platform architecture, create novel trade‑execution and connectivity tools, and conduct deep research on DeFi protocols using on‑chain data to support market‑making strategies. Tasks also include exploring new blockchain functionalities, evaluating smart‑contract libraries, staying current with protocol updates, and delivering deployments across multiple blockchain platforms. Candidates must hold a graduate or postgraduate degree in computer science, computer engineering or a comparable field, be fluent in English, and possess a solid background in programming. Required skills include native comfort with web3 and cryptocurrency markets, advanced knowledge of EVM or another blockchain ecosystem, and proficiency in at least two of C++, Python, Typescript or Rust (Solidity is a plus). Experience with blockchain‑related languages such as Golang, Rust, Solidity, Move or Yul, smart‑contract audits, and large‑scale stack deployments is essential. Desirable attributes are hands‑on blockchain analytics, deep platform expertise, prior fast‑paced quantitative or trading exposure, and familiarity with additional Web3 languages. The position can be based in Zurich, London, New York or Hong Kong, but applicants must already have the right to work in the chosen location without sponsorship.