Rust and Outreachy: 7 Things You Need to Know About the 2026 Internship Program

The Rust Project is expanding its mentorship footprint by joining Outreachy for the May 2026 cohort. Outreachy offers paid internships to people from underrepresented groups in tech, complementing Rust's long-standing participation in Google Summer of Code (GSoC) and OSPP. This article unpacks the program's unique structure, how it differs from GSoC, and the four exciting intern projects that will push Rust's boundaries. Jump to: 1. Rust's Outreachy Debut | 2. Outreachy vs. GSoC | 3. Funding Responsibilities | 4. Calling C++ Functions from Rust | 5. Compiler Code Coverage | 6. Fuzzing Type System Models | 7. Intern Selection and Impact

1. Rust's Outreachy Debut in 2026

After years of successful GSoC and OSPP contributions, the Rust Project is proud to join Outreachy for the first time in the May 2026 internship cycle. Outreachy focuses on supporting individuals who face systemic bias, underrepresentation, or discrimination in the tech industry. By participating, Rust reinforces its commitment to diversity and open-source inclusivity. The program runs twice a year—May to August and December to March—and requires interns to first apply to the overall Outreachy program before choosing a specific community. This marks a significant milestone for Rust, expanding its mentorship ecosystem and inviting new perspectives from underrepresented backgrounds.

2. Key Differences Between Outreachy and GSoC

While both programs offer open-source internships, their application flows differ sharply. In GSoC, contributors apply directly to projects with a proposal; preliminary contributions are optional. Outreachy, conversely, mandates a dedicated contribution period—applicants must contribute to a community before they can apply. GSoC applicants submit a proposal as part of their application, whereas Outreachy requires both contributions and a separate application form. Another distinction: Outreachy's contribution period is structured and time-limited, giving applicants a clear runway to demonstrate their skills. Both programs select interns based on application quality and community engagement, but the order of steps varies, making Outreachy more hands-on from the start.

3. Who Pays the Interns? A Funding Contrast

A major practical difference lies in stipend funding. For GSoC, Google covers all intern stipends and program overhead, allowing communities to focus solely on mentoring. Outreachy, however, shifts the financial responsibility to the participating open-source community. The Rust Project, therefore, must allocate its own budget to support interns' stipends and administrative costs. This self-funding model reflects Rust's strong organizational commitment and its belief in the value of diverse contributions. It also means that Rust's capacity—limited by both funding and mentor availability—led to a decision to mentor only four interns for the May 2026 cohort, ensuring each receives quality guidance.

4. Project One: Calling Overloaded C++ Functions from Rust

Intern Ajay Singh, mentored by teor, Taylor Cramer, and Ethan Smith, will implement an experimental feature for calling overloaded C++ functions directly from Rust. This project aims to bridge the interoperability gap between Rust and C++, especially for codebases that rely on function overloading—a feature Rust itself does not support. The work will involve designing a mechanism to resolve overloads at the FFI boundary and testing it with representative use cases. Success could significantly ease gradual migration of C++ projects to Rust, making Rust more attractive in systems programming environments where legacy C++ code is prevalent.

5. Project Two: Code Coverage of the Rust Compiler at Scale

Akintewe Oluwasola, mentored by Jack Huey, will tackle a quality assurance challenge: measuring code coverage across the entire Rust compiler test suite and ecosystem crates detected by Crater. The goal is to create workflows that run and analyze coverage data to identify untested paths within the compiler and its ecosystem. By building tools for continuous coverage analysis, this project will help the Rust team detect regressions and inadequate testing early. Ultimately, it aims to improve compiler reliability and guide testing efforts where they are most needed, making the development process more data-driven and efficient.

6. Project Three: Fuzzing the a-mir-formality Type System Implementation

Tunde-Ajayi Olamiposi, under the mentorship of Niko Matsakis, Rémy Rakic, and tiif, will develop fuzz testing for a-mir-formality, an experimental model of Rust's type and trait system. This model is still in progress and aims to formalize how Rust's type checker works, aiding in proving correctness. Fuzzing will generate random inputs to stress-test the implementation, uncovering edge cases and potential inconsistencies. The project is critical for ensuring that the formal model accurately reflects Rust's actual behavior, which in turn can lead to better compiler diagnostics and fewer bugs in user code.

7. Intern Selection Process and Closing Thoughts

Rust's limited funding and mentoring capacity led to a careful selection of four interns from a competitive pool. Each intern brings unique skills and perspectives, ensuring diverse contributions to the projects. The Outreachy model—with its emphasis on contributions before application—allowed mentors to evaluate candidates' real-world engagement with Rust's codebase. These internships not only advance Rust's technical capabilities (like C++ interop, compiler coverage, and type system fuzzing) but also strengthen the community's inclusivity. As the May 2026 cohort unfolds, the Rust Project hopes this partnership with Outreachy will become a regular fixture, further opening doors for underrepresented talent in open source.