Flex

HSA/FSA payments, simplified.

Implementation Engineer

Implementation SpecialistCustomer SuccessContractRemoteTeam 11-50Since 2023H1B SponsorCompany SiteLinkedIn

Location

United States

Posted

41 days ago

Salary

Not specified

2 yrs expExperience acceptedEnglish

Job Description

• Support merchants during onboarding and implementation of our APIs and checkout solutions • Troubleshoot integration issues related to APIs, webhooks, authentication, and payment flows • Review and validate API requests/responses using tools like Postman and logs • Assist merchants with setup across platforms (e.g., custom integrations, e-commerce platforms) • Debug issues related to subscriptions, payments, webhooks, and data mismatches • Partner closely with Support Engineering, Product, and Engineering to escalate bugs and unblock launches • Help document common implementation patterns, FAQs, and known issues • Occasionally assist with light data validation or configuration updates in internal tools

Job Requirements

  • 2+ years of experience in an implementation, support engineering or customer engineering
  • Comfortable working with REST APIs, JSON, and HTTP requests
  • Experience using Postman (or similar tools) to test and debug APIs
  • Familiarity with webhooks and asynchronous event flows
  • Strong troubleshooting and problem-solving skills
  • Clear, empathetic written communication — you’ll be working directly with external partners
  • Ability to work independently, prioritize tasks, and manage multiple implementations at once
  • Experience in Shopify implementation

Benefits

  • Flexible hours, with some overlap with U.S. business hours preferred
  • Fully remote
  • Opportunity to extend or convert based on business needs and performance

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