Senior Backend Engineer – Card & Payments Platform

ether.fi; New York (NY); On-site; USD 140,000 - 230,000; Full time

Benefits offered by this job

Token allocation grant

Work from anywhere (4 weeks)

Global offices

Team events and off-sites

Job summary

ether.fi is building on-chain banking capabilities with card-based products and AI-powered workflows. We are seeking a senior backend engineer to own core card program services, optimize authorization and dispute flows, and ship reliable, scalable infrastructure.

You will collaborate across teams and leverage AI tools to accelerate development. You will join a small, ambitious team focused on delivering real consumer DeFi apps, with opportunities to impact product decisions and performance for

Qualifications

• 5+ years of professional backend engineering experience.
• Experience building or operating a card program, on issuing or fintech side.
• Product mindset with focus on user impact.

Responsibilities

• Own core backend services for card program (authorization, clearing, refunds, disputes).
• Reduce card declines by root-cause analysis and fixes with partners.
• Collaborate with design and ops to scope and measure outcomes.

Skills

Backend engineering

Card program experience

AI tooling

Product mindset

Fintech

Tools

CI/CD

Observability

Job description

ether.fi is building on-chain banking capabilities with card-based products and AI-powered workflows. We are seeking a senior backend engineer to own core card program services, optimize authorization and dispute flows, and ship reliable, scalable infrastructure.

You will collaborate across teams and leverage AI tools to accelerate development. You will join a small, ambitious team focused on delivering real consumer DeFi apps, with opportunities to impact product decisions and performance for