Backend Engineer
Karma3Labs builds decentralized, onchain reputation systems for the open web.
Maintainer signals as of 9/25/2026
Funding history
Projects
About Karma3Labs
Karma3Labs is building a decentralized reputation protocol intended to shift trust and reputation away from centralized gatekeepers. Its systems help crypto protocols and developers create resilient reputation layers for decentralized governance, open-social-graph applications, and decentralized marketplaces, supporting safer and more personalized user experiences.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You build scalable backend systems that process, store, and serve large data streams. You develop secure smart contracts, authenticate on-chain and off-chain data, optimize storage, create indexing services and distributed recommendation algorithms, and expose results through external APIs.
Requirements
- 2+ years of experience in backend systems
- Experience with smart contract development
- Solidity as a primary language
- Proficiency in two or more of Go, JavaScript/TypeScript, and Python
- Experience with REST APIs or RPCs
- Experience with AWS or Google Cloud infrastructure services
- Open-source project experience preferred
Responsibilities
- Write extensible and secure smart contracts
- Track the latest EIPs
- Extract and cryptographically authenticate on-chain and off-chain data streams
- Transform data streams into optimized storage solutions
- Develop scalable indexing services for compute clusters
- Implement distributed algorithms for recommendation and reputation scores
- Develop external APIs for third-party applications
Benefits
- Equity or tokens
- Medical, dental, and vision health benefits
- Monthly team events
- Quarterly team offsite
- Flexible work environment
- Remote work
Hiring Process
Email hiring@karma3labs.com with the role title in the subject line and include links to relevant work, such as a GitHub link, project link, and CV. Sharing what excites you about web3 is optional.