Backend Engineer
3F Labs is building 3F, a DeFi protocol on Ethereum mainnet that lets users take leveraged exposure to tokenized real-world assets (RWAs) and lets stablecoin holders earn yield by lending against RWAs through Morpho-powered vaults. It serves both retail depositors seeking leveraged RWA exposure or yield, and institutions requiring permissioned liquidity for bridge facilitation and liquidations.
Maintainer signals as of 8/20/2026
Funding history
Projects
About 3F Labs
3F Labs operates 3F, a protocol currently in private beta on Ethereum mainnet that positions itself as the best place to leverage real-world assets (RWAs) onchain. For leverage takers, the protocol lets users pick a tokenized RWA vault, set a leverage ratio, and have 3F coordinate flash loans, bridge facilitators, and liquidations behind the scenes. For lenders, users can deposit stablecoins (USDC/USDT) into Morpho-powered lending vaults to earn yield by lending against RWAs, with transparent risk parameters, no lock-ups, and highly liquid positions. The protocol serves both retail depositors seeking yield or leveraged exposure and institutions that contribute bespoke, permissioned liquidity for bridge services and liquidation facilitation via a whitelisted front-end. 3F Labs raised a $4M seed round led by Maven 11, with participation from F-Prime, Metalayer Ventures, GSR, Susquehanna Crypto, and Gate Ventures.
Skills
About the Role
You will design build and maintain production backend services and APIs that support financial positions auctions portfolio tracking and blockchain transactions. You will work with databases asynchronous workflows and event driven systems where accuracy consistency security and reliability are critical. You will integrate services with DeFi protocols and blockchain infrastructure and own production systems through monitoring debugging and incident response. You will also contribute to architecture security standards and engineering practices.
Requirements
- Experience building and operating production backend systems
- Proficiency in Rust or TypeScript and willingness to work across both
- Experience designing reliable APIs services and data models
- Understanding of databases and distributed or event driven systems
- Experience owning software through development deployment and production operation
- Problem-solving skills and attention to correctness
- Ability to work independently in a small fast-moving engineering team
- Communication and collaboration skills
- Experience with DeFi lending and borrowing protocols
- Experience with Morpho or similar protocols
- Stablecoin or yield infrastructure experience
- Experience building financial trading or payments systems
- Experience with GCP GKE and Terraform
- Knowledge of CI/CD observability and production infrastructure
- Experience with blockchain transactions and smart contracts
Responsibilities
- Design build and maintain production backend services and APIs
- Build systems that coordinate financial and blockchain transactions
- Develop infrastructure for positions auctions and portfolio tracking
- Work with databases and accurate consistent data models
- Build and maintain asynchronous and event driven workflows
- Integrate backend systems with DeFi protocols and blockchain infrastructure
- Monitor debug and respond to incidents in production services
- Contribute to architecture security and engineering decisions
- Establish engineering standards and best practices
Benefits
- Remote working with UK/EU timezone overlap
- Token allocation
