Senior Integration Engineer (Contractor)

About us:

Working at Tech Holding isn't just a job, it's an opportunity to be a part of something bigger. We are a full-service consulting firm that was founded on the premise of delivering predictable outcomes and high-quality solutions to our clients. Our founders and team members have industry experience and have held senior positions in a wide variety of companies – from emerging startups to large Fortune 50 firms – and we have taken our combined experiences and developed a unique approach that is supported by the principles of deep expertise, integrity, transparency, and dependability.

The Role:

We're seeking a Senior Integration Engineer to lead the modernization of our e-commerce data infrastructure. This critical role focuses on building real-time integrations between our NetSuite ERP and Shopify Plus e-commerce platform using the Celigo iPaaS. You'll design and implement event-driven integration flows that eliminate overselling, accelerate order processing, and provide real-time data synchronization across our core business systems. This role is essential to decommissioning our legacy middleware and establishing a modern, scalable integration architecture. This is hands-on integration development work. You'll spend 80% of your time building Celigo flows, 15% writing NetSuite customizations, and 5% configuring Shopify APIs.

What You Will Do

• Design and build event-driven integration flows in Celigo for real-time inventory synchronization between NetSuite and Shopify
• Develop bidirectional order sync integrations to push Shopify orders into NetSuite for fulfillment and financial reconciliation
• Implement complex data transformation and mapping logic to ensure data integrity across systems
• Build error handling, retry logic, and idempotency controls for mission-critical data flows
• Configure monitoring, logging, and alerting systems to enable proactive issue detection
• Write SuiteScript 2.0 code to implement validation rules, custom workflows, and import processing logic
• Develop RESTlets and custom endpoints to support integration requirements
• Design and implement data integrity controls within NetSuite's import workflows
• Configure Shopify webhooks for inventory updates, order creation, and customer data changes
• Integrate with Shopify REST and GraphQL APIs for product, inventory, and order management
• Implement proper webhook handling with authentication, validation, and idempotency
• Conduct technical audits to identify all integration points requiring migration
• Document integration architecture, data flows, and operational runbooks
• Implement comprehensive observability (monitoring, alerting, logging) for all integration flows
• Conduct integration testing, performance testing, and User Acceptance Testing (UAT) coordination
• Create technical documentation and train operations teams on new workflows

Required Skills

• 3+ years of hands-on experience building production integration flows in Celigo iPaaS
• Deep knowledge of Celigo's connectors, flow builder, mapping tools, and error handling capabilities
• 3+ years of NetSuite development experience with strong SuiteScript 2.0 skills
• Hands-on experience building RESTlets, scheduled scripts, user event scripts, and workflows
• Deep understanding of NetSuite data model (customers, items, sales orders, inventory, locations)
• Knowledge of NetSuite's role-based permissions, saved searches, and customization framework
• 2+ years working with Shopify APIs (REST, GraphQL, Admin API, Storefront API)
• Experience configuring and consuming Shopify webhooks for real-time events
• Understanding of Shopify data model (products, variants, inventory, orders, customers, fulfillments)
• Knowledge of Shopify Plus features and API differences from standard Shopify
• Strong understanding of event-driven architecture and real-time data synchronization
• Experience designing robust error handling, retry logic, and dead letter queue patterns
• Knowledge of idempotency, eventual consistency, and distributed system challenges
• Ability to design data validation rules and integrity controls
• Understanding of API design principles, RESTful patterns, and webhook best practices
• Experience with integration monitoring, observability, and alerting strategies
• A good understanding of e-commerce workflows: inventory management, order fulfillment, returns processing

Nice to Have Skills

##### Bonus Integration Experience

• Celigo certification (Integrator or Architect level)
• NetSuite certifications (SuiteFoundation, Administrator, Developer)
• Experience with other iPaaS platforms (Workato, Boomi, MuleSoft, Dell Boomi)
• Knowledge of ETL tools and data migration methodologies
• Experience with Shopify Flow or Shopify Plus Scripts

##### Additional Platform Knowledge

• Shopify Liquid templating and theme development (basic level)
• Experience with Digital Asset Management (DAM) platforms like Cloudinary, Damvia, and Bynder

What We Offer:

• Remote and flexible work environment.
• Exposure to enterprise clients and transformative cloud projects.
• Opportunity to directly impact Tech Holding's growth and client success.
• Competitive compensation package.