Backend Engineer - Card Transaction Processing
ether.fi helps users stake ETH, BTC, and stablecoins while earning rewards and maintaining full control through liquid restaking tokens integrated across DeFi protocols.
Maintainer signals as of 8/23/2026
Funding history
Projects
About ether.fi
ether.fi provides decentralized liquid staking and restaking for Ethereum, Bitcoin, and stablecoins. Users deposit assets to receive liquid tokens (eETH, weETH, eBTC, eUSD) that earn staking rewards, restaking yields, and loyalty points while remaining composable across DeFi protocols. The platform integrates with EigenLayer, Symbiotic, and Karak for restaking, uses distributed validator technology through SSV Network, and offers automated DeFi strategy vaults plus a crypto-native credit card.
Skills
About the Role
You will own core backend systems and improve their throughput and latency. You will design and optimize scalable services for high-throughput low-latency financial transactions, reduce card transaction declines, and improve cloud infrastructure, CI/CD, automation, observability, and monitoring.
Requirements
- Strong software engineering fundamentals and problem-solving skills
- Experience shipping products used by thousands of real users
- 5+ years of professional coding experience
- Experience with credit card transaction processors is a plus
- Experience on the card issuing side is a plus
Responsibilities
- Own core backend systems
- Design and optimize scalable transaction processing services
- Reduce user friction caused by declined card transactions
- Improve cloud infrastructure, CI/CD, automation, observability, and monitoring
Benefits
- Equity
- Performance-based incentives
- Token allocation grant
- Health insurance
- Dental insurance
- Vision insurance
- Four weeks of work from anywhere
- Travel opportunities
- Company events and team-building off-sites
