REST API Developer Needed for Webhook Integration Workstream

Keystone Digital

Freelance · Remote · Flexible hours

About the role

We are launching an integration hub that links our billing system, CRM, and internal services via robust REST APIs. The project demands a developer who can design, implement, and document endpoints that ensure data consistency and low latency across platforms.

Key responsibilities

• Design and develop secure RESTful APIs using NodeJS and JavaScript
• Integrate PostgreSQL data stores with external billing and CRM services
• Write comprehensive OpenAPI specifications and unit tests
• Collaborate with product owners to translate business rules into API contracts
• Monitor performance and troubleshoot integration issues in real time

Must-have skills

• Strong experience building REST APIs with NodeJS
• Proficiency in JavaScript (ES6+)
• Hands‑on PostgreSQL schema design and query optimization
• Understanding of authentication (OAuth2/JWT) and API security best practices

Nice to have

• Familiarity with billing platforms (e.g., Stripe, Recurly)
• Experience with CRM systems (e.g., Salesforce, HubSpot)
• Knowledge of Docker or containerized deployment