Senior Backend Engineer - Payments

Maxana; United States; On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

High-Impact Architecture Project

Executive Visibility

Competitive Contract Compensation

Flexible Remote Structure

Clear Scope, Clear Timeline

Long-Term Engagement

Technical Ownership

Job summary

A leading fintech firm is looking for a senior backend engineer to join a payment modernization initiative. This role involves building and integrating payment orchestration systems under the CTO's guidance. Candidates should have over 6 years of backend experience, proficiency in technologies like Node.js or Java, and deep knowledge of payment systems. The project offers competitive compensation, a high-impact architecture project, and a clear scope and timeline while allowing for a flexible remote work environment.

Qualifications

• 6+ years of backend experience.
• Extensive REST API integration experience.
• Deep payments domain experience required.
• Webhook processing experience

Responsibilities

• Build and maintain API integrations with multiple PSPs.
• Implement payment routing logic.
• Develop webhook handlers.
• Implement tokenization flows.
• Support subscription billing logic.
• Ensure resilience and observability.

Skills

Node.js

Java

Python

Go

REST API integration

Webhook processing

Payments expertise

Payments domain

Auth/Capture flows

Tools

Gr4vy

Stripe

Job description

Location: Remote (U.S. overlap preferred)
Type: Contract (Full-Time Preferred)
Domain: Payments / Fintech / eCommerce Infrastructure

About the Project

We are leading a modernization initiative for a high-growth digital commerce platform focused on payment orchestration, gateway optimization, and API-driven architecture.

Experience with orchestration platforms such as Gr4vy, Stripe, etc. is highly desirable, but not required. Deep payments experience is mandatory.

About the Role

We are seeking a senior backend engineer to support a payment modernization initiative. You will work directly under the CTO to build and integrate payment orchestration systems and direct PSP connections.

Responsibilities

• Build and maintain API integrations with multiple PSPs
• Implement payment routing logic
• Develop webhook handlers
• Implement tokenization flows
• Support subscription billing logic
• Ensure resilience, observability, and clean error handling

Qualifications

• 6+ years backend experience
• Strong in one or more:
  • Node.js
  • Java
  • Python
  • Go
• Extensive REST API integration experience
• Webhook processing experience
• Payments domain experience required
• Strong understanding of:
  • Auth/Capture flows
  • Refund logic
  • Chargeback lifecycle
  • Subscription billing

Benefits

• High-Impact Architecture Project
• Executive Visibility
• Competitive Contract Compensation
• Flexible Remote Structure
• Clear Scope, Clear Timeline
• Long-Term Engagement
• Technical Ownership