Contract Role: Middleware Developer for Bullhorn–ActiveCampaign Bidirectional Sync Location: Remote

Company Description

At Ignite Your Spark Digital, we believe every business has a spark waiting to become a flame. Our mission is to turn that spark into sustainable business growth through data-driven digital marketing strategies that deliver results. For over a decade, we've helped large Fortune 500 organizations increase visibility, build qualified pipelines, nurture customer relationships, and drive measurable ROI. We focus on making marketing human, practical, and results-driven, tailoring strategies to our clients' specific goals and visions.

We are seeking an experienced API developer to architect and implement a robust, bidirectional integration between Bullhorn CRM/ATS and ActiveCampaign, our marketing automation platform. This integration will ensure accurate, real-time synchronization of lead and contact data, enabling seamless alignment between marketing and sales operations.

Scope of Work

• Develop a secure middleware layer that wraps Bullhorn and ActiveCampaign REST APIs
• Enable lead/contact sync with key fields (name, email, phone, company, tags/lists)
• Support bidirectional synchronization: updates in one system are reflected in the other
• Map and handle custom fields (e.g., lead stage, status, source, job role)
• Implement webhook orchestration and polling fallback for near–real-time updates
• Ensure idempotent upserts and deterministic matching using external IDs and email/phone
• Integrate retry logic with backoff, dead-letter queues, and structured logging
• Ensure scalability to handle high lead volumes and future extensibility
• Provide audit-ready documentation and test harnesses for QA and stakeholder handoff

Required Skills & Experience

• Proven experience building API integrations for CRM and marketing automation platforms
• Strong knowledge of REST APIs, JSON, and development in Python, Node.js, JavaScript, or PHP
• Familiarity with OAuth 2.0, Bullhorn REST API, and ActiveCampaign API
• MUST HAVE: Experience setting up API integrations in marketing automation environments (not just general web development)
• Experience with Zapier, Make, or other middleware tools as fallback workflows
• Background in B2B sales, recruitment, staffing, or healthcare industries (preferred)
• Strong communication skills and ability to work independently

Preferred Architecture

• A middleware layer that abstracts both APIs and centralizes sync logic
• Webhook triggers and polling fallback for update detection
• Configurable mapping layer for field transformations and validation rules
• Deployment via AWS Lambda, ECS, or Vercel depending on scale and latency needs
• Structured logging, correlation IDs, and error resilience mechanisms

Deliverables

Fully functional bidirectional integration between Bullhorn and ActiveCampaign

• Test cases demonstrating correct data sync in both directions
• Data schema for contact field mapping and transformation logic
• Secure deployment with credential management
• Documentation: API endpoints used, field mapping, troubleshooting guide, and QA handoff materials

Budget

We are open to proposals from those with relevant experience and approaches. Please include:

• Estimated hours and cost for a basic one-way sync
• Estimated hours and cost for a full bidirectional sync with custom fields and error handling

Timeline Target completion:

4–6 weeks from project start

How to Apply

Please include in your proposal:

• Examples of API integrations you’ve built (CRM/marketing automation preferred)
• Your recommended approach (direct API vs. middleware)
• Estimated timeline and cost for delivery (one-way and bidirectional sync)
• Any relevant experience with audit logging, compliance, or healthcare/staffing environments