Backend Engineer - Card Transaction Processing

New York remote Until 8/21/2026 First posted April 3, 2026 Last 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

Compensation (from employer):
US / Cayman: $170K – $200K • Offers Equity • Offers Bonus

About this role

Summary

Develop and optimize backend systems for high-throughput, low-latency financial transactions.

Job title

Backend Engineer - Card Transaction Processing

Experience level

5+ years

Industry

cryptocurrency

Location requirements

New York, on-site, no remote work mentioned

Salary

US / Cayman: $170K – $200K • Offers Equity • Offers Bonus

Management role

No

Skills & keywords

Required skills

software engineeringproblem solvingscalable transaction processing

Preferred skills

card transaction processingcloud infrastructureCI/CDautomationmonitoring

Specializations

backendtransaction processingfinancial services
Locations

Structured locations inferred from the posting.

New York, NY, USA

On-site City