Junior Rust Developer
BuildBear Labs provides cloud-enabled, private, shareable EVM sandboxes for testing, debugging, and deploying smart contracts and dApps. Its platform includes sandbox environments, token faucets, transaction exploration tools, and plugin integrations for Web3 developers and teams.
Maintainer signals as of 8/23/2026
Funding history
Projects
About BuildBear Labs
BuildBear Labs operates a Web3 developer-testing platform for creating private testnets across Ethereum and EVM-compatible chains. Developers and teams can spin up persistent, forked EVM sandboxes to simulate mainnet conditions, test smart contracts and dApps, collaborate in shared environments, use free native and ERC-20 test tokens, and inspect or debug transactions. The company also offers plugins for services such as account abstraction, price feeds, automation, security scanning, and blockchain exploration, with plans for individual developers through enterprise teams.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You will build optimized Rust applications for Web3 projects, apply performance-focused patterns and algorithms, create scalable backend services with axum, rocket, or hyper, and use tokio or async-std for asynchronous Rust. You will write unit tests, participate in code reviews, expand your Web3 knowledge, and collaborate with other developers.
Requirements
- At least 1 year of programming experience
- Understanding of Rust syntax, ownership, borrowing, and common data structures
- Interest in Web3 technologies
- Experience with diesel or sqlx
- Problem-solving and learning skills
- Ability to work independently and collaboratively
Responsibilities
- Build optimized Rust applications for Web3 projects
- Apply Rust patterns and algorithms to create efficient services
- Build scalable backend services with axum, rocket, or hyper
- Use tokio or async-std for asynchronous Rust development
- Write comprehensive unit tests
- Participate in code reviews
- Expand knowledge of Web3 concepts and technologies
- Collaborate with other developers