Principal Application Developer (AGENCY) (372)

Applicants must be legally authorized to work in the United States. This position is not eligible for visa sponsorship now or in the future.

This role requires residency in South Florida, Dallas-Fort Worth, or Atlanta, GA area. Candidates located outside this area may not be considered. Relocation, if applicable, is at the candidate’s own expense.

SUMMARY: The Principal Application Developer is accountable for the design, coding/build, and scale-out of a modern e-commerce platform backend. In this role you will be responsible for the software architecture and development of a custom, robust eCommerce platform able to support a wide array of product catalogs, checkout workflows, and integrations with third-party applications and services to ensure seamless commerce. You will play a key role in ensuring the platform is secure, scalable and reliable to handle high transaction volumes and future growth.

DUTIES & RESPONSIBILITIES:

Responsibilities include, but are not limited to:

• Design, build, and maintain the core back-end software architecture for a scalable e-commerce platform.
• Develop APIs, microservices, and integrations to power front-end applications and third-party services.
• Implement secure payment systems, inventory management, and order fulfillment logic.
• Optimize database schemas and queries for high availability and large-scale traffic.
• Ensure platform compliance with security and privacy standards.
• Collaborate with front-end developers, DevOps, and product managers to deliver a seamless platform experience.
• Build automation, CI/CD pipelines, and monitoring tools for system reliability.
• Proactively identify performance bottlenecks and design scalable solutions.

Qualifications

MINIMUM REQUIREMENTS:

• Bachelor’s degree in computer science, software engineering or equivalent experience
• OR an additional 3 years of specific work experience in lieu of degree
• 7 years of relevant/technical work experience
• Strong proficiency in server-side languages
• Experience with frameworks
• Proficiency in relational and non-relational databases
• Experience with JSON, XML, and structured data formats
• Experience building and consuming RESTful and/or GraphQL APIs
• Knowledge of microservices architecture, event-driven systems, and containerization
• Familiarity with cloud platforms
• Hands-on experience with eCommerce including inventory management, payment gateways, shopping cart logic, and shipping APIs
• Experience with integrations involving ERP backend systems
• Understanding of catalog management, inventory, promotions, and multi-vendor systems
• Will be required to travel 25%

PREFERRED REQUIREMENTS:

• Experience designing distributed systems for high-traffic e-commerce
• Knowledge of caching, message queues, and search optimization
• Exposure to headless commerce platforms and API-first architectures
• Previous experience with large-scale e-commerce builds or SaaS platforms

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