Backend Engineer - Card Transaction Processing

Ether.fi

New York City, New York, United States Remote permanent

Posted: April 3, 2026

Job Description

About us:

Ether.fi is one of the largest crypto companies in the world. We have over $10B in assets under management and a team of 30 almost all technical staff. We’ve been profitable day one and are focusing on building real consumer applications.

The future we envisage is true on-chain banking. Our current products; Stake, Liquid, and Cash enable users to earn yield in a variety of DeFi strategies, and spend their assets in the real world with our credit cards. You can view public analytics on Dune for Cash and Stake.

Position overview:

We’re looking for a senior full backend software engineer to own core backend architecture, card transaction processing and high availability. You will belong to a key engineering team focusing on delivering distributed, scalable and robust backend systems. Everything from card transaction processing, low latency apis, microservice architectures and on-chain data indexing. Anything that a neobank would build is on our roadmap.

What you’ll do:

• Own core areas of our backend systems, and extend current functionality to improve throughout and latency

• Design, develop, and optimize scalable transaction processing services to support high-throughput, low-latency financial transactions.

• Tackle the challenges in user frictions for their card transactions being declined

• Drive improvements in our Cloud Infrastructure, CI/CD pipelines, automation, observability, and monitoring systems.

What we are looking for:

• Strong fundamentals in software engineering and problem solving

• You have shipped impressive products with thousands of real users

• 5+ years of professional coding experience

• Drive, willingness to work hard and go the extra mile. We are a highly ambitious, driven team with audacious goals, and we work very hard to make them a reality

• Plus if you are experienced in credit card transaction processor such as Paymentology, Episode 6, etc.

• Plus if you are experience in card issuing side

Perks and benefits:

• Competitive salary, performance-based incentives, and token allocation grant

• Opportunity to work on multi-billion dollar products as part of a small team

• Health, dental, and vision insurance plans

• Global team with opportunity for travel and working out of our 3 offices around the world

• 4 weeks work from anywhere

• Exciting company events and team-building off-sites

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