API & SDK Implementation Engineer (Customer-Facing)

Payarc Llc; Greenwich (CT); Hybrid; USD 90,000 - 120,000; Full time

Job summary

Payarc Llc in Greenwich, CT is seeking a Product Support & Implementation Engineer to deliver expert technical support for Payarc’s API and SDK products, helping developers and merchants with integrations from the initial API call to production.

The role sits at the intersection of Support, Product, and Engineering, requiring strong communication, problem-solving, and ownership to ensure successful onboarding and ongoing customer success across Payarc Gateway, Payarc Connect, and Merchant

Qualifications

• 3+ years in Level 2 or higher API/SDK technical support.
• Strong knowledge of RESTful APIs, SDKs, webhooks, and authentication.
• Experience with Postman for testing and troubleshooting.
• Proven customer-facing experience on integrations projects.
• Familiarity with API documentation platforms such as ReadMe.io.

Responsibilities

• Provide expert-level API and SDK technical support for Payarc products.
• Guide ISV and merchant customers through integration lifecycles from first API call to production launch.
• Diagnose, reproduce, and resolve complex technical issues across gateways, terminals, and services.
• Maintain and improve API documentation and developer resources.
• Relay customer feedback to product and engineering for continual improvement.

Skills

Excellent communication

Analytical problem solving

Cross-functional collaboration

Ownership and accountability

Education

Bachelor’s degree in computer science or related field

Tools

Postman

ReadMe.io

JIRA

Confluence

Job description

Payarc Llc in Greenwich, CT is seeking a Product Support & Implementation Engineer to deliver expert technical support for Payarc’s API and SDK products, helping developers and merchants with integrations from the initial API call to production.

The role sits at the intersection of Support, Product, and Engineering, requiring strong communication, problem-solving, and ownership to ensure successful onboarding and ongoing customer success across Payarc Gateway, Payarc Connect, and Merchant