# Backend Engineer - Card Transaction Processing
**Company:** [Ether.Fi](https://hotfix.jobs/companies/ether-fi)
**Location:** New York, NY, Denver, CO
**Salary:** $170K-$200K
**Experience:** 5+ years
**Skills:** Backend Development, Microservices, Low Latency Apis, Transaction Processing, Cloud Infrastructure, CI/CD, Observability, Monitoring, On-Chain Data Indexing, Payment Processing
**Posted:** 2026-04-03
> Builds and owns scalable backend systems for card transaction processing, low-latency APIs, and microservices in a crypto neobank. Requires 5+ years experience shipping high-impact products.
## Job Description
## Responsibilities
- Own core areas of backend systems and extend functionality to improve throughput and latency.
- Design, develop, and optimize scalable transaction processing services for high-throughput, low-latency financial transactions.
- Tackle challenges in user frictions for card transactions being declined.
- Drive improvements in Cloud Infrastructure, CI/CD pipelines, automation, observability, and monitoring systems.

## Requirements
- Strong fundamentals in software engineering and problem solving.
- Shipped impressive products with thousands of real users.
- 5+ years of professional coding experience.
- Drive, willingness to work hard and go the extra mile.

## Nice-to-Haves
- Experience in credit card transaction processors such as Paymentology, Episode 6, etc.
- Experience in card issuing side.

## Perks and Benefits
- Competitive salary, performance-based incentives, and token allocation grant.
- Health, dental, and vision insurance plans.
- 4 weeks work from anywhere.
- Global team with travel opportunities and exciting events.
**Apply:** https://hotfix.jobs/jobs/backend-engineer-card-transaction-processing-at-ether-fi-48ce888c-8113-4891-ba5a-f1ae1a4eca8a
**Canonical:** https://hotfix.jobs/jobs/backend-engineer-card-transaction-processing-at-ether-fi-48ce888c-8113-4891-ba5a-f1ae1a4eca8a