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Cryptography Research Intern
Remote, Boulder, Berlin
Ethereum Foundation – Internship /
Intern /
Hybrid
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About the Ethereum Foundation
The 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 Internship
As 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.
Cryptography Research team description
We design and analyze cryptographic primitives critical to Ethereum’s roadmap, advise protocol and client teams on security choices, and publish peer-reviewed results that keep the Ethereum at the bleeding edge of cryptography research.
Resources:
- Paper: Data Matching in Unequal Worlds and Applications to Smart Contracts
- Event: Cryptanalysis of Algebraic Hash Functions
- Post: zkFOCIL: Inclusion List Privacy using Linkable Ring Signatures
- Paper: At the Top of the Hypercube – Better Size-Time Tradeoffs for Hash-Based Signatures
- Article: Computer Scientists Figure Out How To Prove Lies
More on the EF Protocol cluster: https://protocol.ethereum.foundation/
Skills
- Math foundations: discrete math, probability, linear algebra, and finite fields
- Cryptography basics: security definitions (completeness/soundness/knowledge soundness), random-oracle reasoning, collision resistance, and commitments/hashes
- Hash functions & trade-offs: understand SHA-256 vs SNARK-friendly hashes (e.g., Poseidon)
- Strong coding knowledge in at least one systems language (Rust/C++/Go)
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 month
Important dates:
This application closes on Dec 1st, 2025. Applicants will receive decisions by January 30th, 2026.
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Is Web3 all open source?
Web3, also known as the decentralized web, is a term that refers to the next evolution of the internet, where users have more control over their data and online interactions
As a concept, Web3 is not necessarily tied to any specific technology or platform, so it's difficult to say whether it is all open source
However, many of the technologies and platforms that are associated with Web3, such as blockchain and decentralized applications (dApps), are open source
This allows developers to freely access, modify, and distribute the source code for these technologies, which helps to promote innovation and collaboration within the Web3 ecosystem.