Senior Integration & Web Systems Engineer

Location: Mansfield, TX

Job : 599

# of Openings: 1

Sellmark Corporation develops and distributes industry‑leading outdoor lifestyle and tactical products across multiple brands. We are committed to innovation with a purpose, delivering solutions that enhance our customers’ performance and safety.

The Senior Integration & Web Systems Engineer is responsible for designing, developing, and optimizing Sellmark’s web platforms, integrations, and data architecture. This role connects Net Suite (Suite Commerce), Shopify, Salesforce, and other systems using Celigo iPaaS while ensuring scalability, performance, and reliability.

• Develop responsive web applications from scratch
• Manage domains, DNS, and SSL certificates
• Optimize performance, SEO, and UX

• Develop and maintain Suite Commerce solutions
• Customize themes and modules
• Work with Suite Script and Net Suite APIs

• Design integrations using Celigo iPaaS
• Manage APIs, webhooks, and data flows
• Design data models and data lakes
• Develop SQL scripts, views, and procedures
• Optimize performance and ensure data integrity

• Manage Shopify stores and integrations
• Customize themes (Liquid)

• Advanced use of Google Sheets for data analysis and reporting
• Develop complex formulas, queries, and data transformations
• Integrate Google Sheets with other systems via APIs or middleware
• Automate workflows using scripts (Apps Script preferred)

• Work with JSON and APIs
• Use Git Hub for version control and CI/CD

• 3+ years experience in development/integrations
• Experience with Celigo iPaaS
• Strong SQL and database design
• Shopify experience
• Strong experience with Google Sheets (advanced formulas, automation)

• Experience with Alloy
• Net Suite ecosystem knowledge
• AWS or cloud platforms
• Salesforce integrations

• May be required to sit or stand, for extended periods.
• Occasional bending, twisting, reaching, pushing, pulling, and operating office machinery and motor vehicles.
• Must be able to lift up to 50 pounds.

• Main hours are Monday – Friday 8am – 5pm in office daily.
• Schedule may include evenings or weekends based on business needs

• Competitive salary based on experience.
• 401(k) with company match.
• Excellent medical, dental, and vision insurance (effective first of the month following 30 days).
• Generous paid time off
• Access to company wellness amenities: gym, sauna, chiropractor, cafeteria, and event space.
• Intensive training program with ongoing professional development and career growth opportunities.