G-20 Group is a cross-asset trading firm headquartered in Switzerland, trading delta-one and derivatives markets globally. We combine startup agility with institutional-grade experience in proprietary trading, technology, and quantitative finance.

We are looking for a motivated and technically curious DeFi Developer & Engineer Intern to join our global trading firm. This is an opportunity to gain hands-on experience in blockchain technology, decentralized finance (DeFi), and quantitative trading within a collaborative, technology-driven environment.

Working alongside experienced engineers, quantitative researchers, and traders, you will contribute to the development of blockchain-based solutions, trading infrastructure, and DeFi applications. The ideal candidate will have strong programming fundamentals, a genuine interest in cryptocurrency markets, and a desire to develop their technical expertise in a fast-paced trading environment.

• Support the development and improvement of trading algorithms, infrastructure, and blockchain connectivity solutions. 
• Research and analyze DeFi protocols, blockchain ecosystems, and on-chain data to identify opportunities for innovation. 
• Assist in developing, testing, and deploying smart contracts and blockchain-based applications. 
• Explore emerging blockchain technologies, protocols, and development frameworks. 
• Collaborate with engineers and traders to support the implementation of automated trading and market-making solutions. 
• Monitor developments across DeFi protocols and cryptocurrency markets, sharing relevant findings with the team. 
• Participate in code reviews, debugging, testing, and technical documentation. 
• Currently pursuing or recently completed a Bachelor's or Master's degree in Computer Science, Computer Engineering, Mathematics, or a related technical discipline. 
• Strong programming fundamentals, with proficiency in at least one of the following: Python, C++, Rust, TypeScript, or Solidity. 
• Basic understanding of blockchain technology, smart contracts, and decentralized finance. 
• Familiarity with Ethereum, EVM-compatible chains, or other blockchain ecosystems. 
• Interest in cryptocurrency markets, algorithmic trading, and financial technology. 
• Strong analytical and problem-solving skills, with an eagerness to learn and tackle complex technical challenges. 
• Ability to work collaboratively in a fast-paced environment. 
• Fluent English communication skills. 

• Academic projects, personal projects, internships, or contributions to open-source blockchain applications. 
• Exposure to smart contract development using Solidity or other blockchain programming languages. 
• Familiarity with DeFi protocols, decentralized exchanges (DEXs), or on-chain analytics. 
• Experience with Web3 development tools and frameworks such as Foundry, Hardhat, or ethers.js. 
• Basic understanding of quantitative trading, market making, or financial markets. 
• Familiarity with Git, APIs, and software development best practices. 

Join G-20 and be a part of a team that is at the forefront of financial markets, driving innovation and excellence in the sector.