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About the Ethereum FoundationThe Ethereum Foundation (EF) is a global non-profit organization dedicated to supporting Ethereum and related technologies. Our mission is to do what is best for Ethereum’s long-term success. Our role is to allocate resources to critical projects, to be a valued voice within the Ethereum ecosystem, and to advocate for Ethereum to the outside world.EF InternshipAs part of our mission to advance blockchain systems, interns will contribute to bleeding edge research that spans computer science, distributed systems, crypto-economics, and mechanism design. This program offers a unique opportunity to work closely with Ethereum Foundation researchers, their collaborators, and other contributors across the ecosystem, tackling both foundational and applied research challenges. Interns will also have opportunities to share their findings through ethresear.ch, academic publications, or conference submissions helping shape the future of Ethereum.Interns can choose to work remotely but are encouraged to work out of an EF office (likely Berlin, Germany). In addition, interns will be invited for an in-person cohort meetup in the summer.The duration of the internship is 12 weeks during summer 2026.Protocol Security team descriptionThe Protocol Security Research team safeguards Ethereum’s integrity. Through coordination, meticulous code reviews, developing advanced tooling, and real-world simulations, we focus on securing the network and its critical components. Our hands-on approach includes managing the bug bounty program, continuously monitoring the network, and collaborating with client teams. We’re committed to identifying and mitigating risks to Ethereum mainnet.More on the EF Protocol cluster: https://protocol.ethereum.foundation/

Skills

• AI Tooling: Experience building complex AI tools for topics such as security or ingesting and analyzing large amount of code
• Experience writing code in Python, Go or Rust.
• CS foundations: data structures/algorithms, debugging, unit/integration testing, Linux, Git/GitHub
• Ethereum basics: EVM, gas/fees, transactions; know execution vs. consensus; able to read an EIP/spec is a plus
• Understanding how code reviews work from a security point of view is a plus
• Crypto basics: hashes, Merkle trees, digital signatures (ECDSA/BLS)

Responsibilities

• Conduct original research in areas relevant to Ethereum and decentralized technologies.
• Collaborate with Ethereum Foundation researchers and contributors to address pressing technical and conceptual challenges.
• Contribute to public-facing materials, such as blog posts, white papers, and technical reports, to share research outcomes.
• Engage with the broader research community through discussions, seminars, and collaborations.

Qualifications

• Current university enrollment studying a relevant field such as computer science, cryptography, mathematics, or economics. Very recent graduates (~1 year) may also be considered.
• Demonstrated interest in Ethereum, blockchains, and decentralized technologies.

$8,000 - $8,000 a monthImportant dates:This application closes on Dec 1st, 2025. Applicants will receive decisions by January 30th, 2026.