Flex
HSA/FSA payments, simplified.
Implementation Engineer
Location
United States
Posted
35 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
