API Integration Developer (ActiveCampaign Focus) - Part-time - Worldwide

About Us

We are an ActiveCampaign partner and reseller delivering custom marketing automation solutions to clients. Our core need is building custom integrations between ActiveCampaign and various third-party platforms using APIs.

Our first upcoming integration involves connecting ActiveCampaign with a niche European ticketing platform in the theme park industry. This will serve as the foundation for future similar API integration projects.

Project Overview

We are seeking a developer with strong API integration experience to:

Phase 1 – Feasibility & Technical Scoping

• Review the ticketing platform’s API documentation
• Analyze integration feasibility with ActiveCampaign’s API
• Map data flows (contacts, transactions, tags, events, etc.)
• Provide technical recommendations and scope estimate
• Identify potential limitations or risks

Phase 2 – Full Integration Development

• Build a custom integration between the ticketing platform and ActiveCampaign
• Connect relevant endpoints
• Implement secure authentication
• Handle data mapping and transformation
• Build error handling and logging
• Ensure reliable synchronization between systems
• This is not a Zapier-level integration — this is a custom API-to-API build.

Required Skills

• Strong experience working with REST APIs
• Proven experience building API-to-API integrations
• Ability to read and quickly understand unfamiliar API documentation
• Experience handling authentication methods (API keys, OAuth, etc.)
• Strong backend development skills (Node.js, PHP, Python, or similar)
• Solid debugging and error-handling capabilities

Preferred (But Not Mandatory)

• Direct experience working with the ActiveCampaign API
• Experience integrating marketing automation platforms
• Familiarity with webhook-based architectures
• Experience handling customer/transaction data synchronization

What We’re Looking For

• Someone technically strong and independent
• Comfortable working without heavy supervision
• Able to respond within 24 hours
• Project-based availability (not full-time at this stage)
• Interested in building a longer-term relationship

Beyond this initial integration, we anticipate recurring needs to:

• Connect ActiveCampaign to other niche platforms
• Develop additional custom integrations
• Expand automation capabilities for clients
• This role has strong potential for continued collaboration if successful.