High Level App Developer

About this role

Location: Remote

Role Type: Contract-to-Hire or Project-Based

Project: Custom HighLevel Marketplace App for Back Nine Golf

We are hiring an experienced application developer for one of Lago’s partner clients. You will architect, build, and deploy a custom HighLevel Marketplace App that syncs golfer, membership, booking, and financial data across their entire network. This is a hands-on role working with leadership, engineering, and operations to turn disconnected systems into a clean and automated platform.

What You Will Build

You will architect, develop, and deploy a custom HighLevel marketplace app that integrates:

• Sync Core Systems With HighLevel

Build secure authentication, two-way sync, and automated creation of new franchise sub-accounts based on master data.

• Sync Membership Data

Pull and map active memberships, levels, statuses, custom fields, history, and recurring revenue data for every golfer.

• Integrate Full Swing Data

Authenticate with Full Swing, pull golfer profiles and performance data, and map everything into the correct contact or custom fields in HighLevel.

• Sync Revenue and Financial Metrics

Pull and push revenue, transactions, upsells, promo use, and any KPI data needed for dashboards and automation.

• Sync Tee Times and Bookings

Sync all bookings, cancellations, reschedules, confirmations, and attendance between the booking engine and HighLevel in real time.

• Sync Forms and Lead Activity

Pull form submissions, create or update contacts, and map fields and tags into the correct sub-account.

• Support a Multi Location Franchise Model

Assign data to the right franchise sub-account, keep data separated, and support proper versioning for a Marketplace app.

Responsibilities

• Architect and maintain the data model for all integrations
• Build backend logic connecting HighLevel, Back Nine, and Full Swing APIs
• Implement real-time sync, error handling, and data integrity safeguards
• Develop scalable provisioning for new franchises
• Document the full integration for deployment and future development
• Communicate progress clearly with all stakeholders

Requirements

• Technical
• Proven experience building HighLevel Marketplace apps
• Deep knowledge of HighLevel API v2, OAuth, scopes, and app publishing
• Strong backend engineering skills (Node.js preferred)
• Experience with complex third-party API integrations
• Familiarity with multi-tenant, franchise, or distributed systems
• Strong understanding of webhooks, sync queues, and logging systems

- Excellent database and data mapping skills

• Bonus
• Experience with Full Swing API or similar sports/performance tracking systems
• Experience connecting SaaS apps into HighLevel
• Stripe or subscription billing integrations
• Background in golf or sports tech
• Success Criteria
• Within the first 30 to 90 days, you will:
• Deliver a working version of the Back Nine → HighLevel sync
• Integrate Full Swing data into HighLevel cleanly and reliably
• Achieve full membership, booking, and form submission sync
• Implement revenue reporting and KPI metrics in HL
• Prepare the app for Marketplace submission if needed

Benefits

• Remote Work Flexibility – Work from anywhere while staying connected with a high-performing team.
• Career Growth Opportunities – Expand your expertise in digital marketing and client management.
• Supportive Team Culture – Collaborate with passionate professionals who value teamwork and innovation.

As part of our recruitment process, all candidates are kindly asked to read, understand, and agree to Lago’s Confidentiality and Non-Circumvention Agreement . This ensures a respectful and professional experience for everyone involved.