Payments API Solutions Engineer

Polygon Labs; Oregon; Hybrid; USD 120,000 - 160,000; Full time

Job summary

Polygon Labs is seeking a Senior Technical Solutions Engineer to own the technical experience of building on Polygon: API and integration documentation, the integration path, technical support during the sales process, and bringing signed partners to production.

Our standard is a best-in-class developer experience in payments, where a capable developer, including one using AI coding tools, can integrate with minimal direct support.

Qualifications

• Hands-on experience with US payments (ACH, RTP, wires, card networks) and settlement/reconciliation.
• Led API integrations or documented SDKs at API-first payments company or fintech.
• Strong API troubleshooting, log reading, webhook debugging, and authentication/retry reasoning.
• Excellent technical writing for external developers.
• Regular use of AI tools to build, document, and automate work.
• Comfort in a fast-moving, evolving platform and documentation environment.

Responsibilities

• Own API and integration documentation; ensure accuracy, completeness and clarity as the platform evolves.
• Build quickstarts, sample code, and reference architectures for self-serve integration.
• Serve as primary technical resource in sales conversations and partner integrations, documenting reusable solutions.
• Lead signed partners through requirements intake, provisioning, KYB/KYC, sandbox testing, webhook setup, and go-live validation.
• Develop deep platform knowledge across ramps, bank rails, wallets and accounts, custodial vs non-custodial flows, and webhooks.
• Create demos and environments to support Business Development and Sales.
• Identify API/documentation gaps and propose clear recommendations to Product and Engineering.
• Use AI and internal tooling to streamline onboarding, provisioning, and frontline support.

Skills

US payments

API integrations

Technical writing

AI tooling

Troubleshooting

Fast-moving environment

Tools

Postman

Bruno

Datadog

Job description

Polygon Labs is seeking a Senior Technical Solutions Engineer to own the technical experience of building on Polygon: API and integration documentation, the integration path, technical support during the sales process, and bringing signed partners to production.

Our standard is a best-in-class developer experience in payments, where a capable developer, including one using AI coding tools, can integrate with minimal direct support.