Senior Full-Stack E-Commerce Technical Lead

Senior Full-Stack E-Commerce Technical Lead

New York, NY

1-Year Contract

We are seeking a Senior Full-Stack E-Commerce Technical Lead to help build an enterprise-grade B2B e-commerce platform supporting a catalog of 1M+ products and integrations with TD SYNNEX, Microsoft Dynamics 365 Business Central, payment providers, shipping services, and other business systems.

This is a hands-on technical leadership role. You will design the architecture, write production code, lead integrations, solve scalability and reliability challenges, review code, and mentor an existing developer. The goal is to deliver a production-ready platform within approximately 12 months through phased releases.

• Design scalable architecture for a large B2B e-commerce platform.
• Lead full-stack development across storefront, backend services, APIs, databases, search, and integrations.
• Design and implement TD SYNNEX integration, including product catalogs, pricing, inventory, orders, shipments, tracking, and error/retry handling.
• Architect and manage 1M+ product catalogs, including bulk imports, incremental updates, product data, pricing, inventory, caching, and validation.
• Build scalable enterprise search using technologies such as Elasticsearch, Open Search, Azure AI Search, or Algolia.
• Develop B2B commerce capabilities including customer/company accounts, roles, cart, checkout, quotes, POs, customer/contract pricing, credit terms, orders, shipping, tax, returns, and reordering.
• Integrate with Microsoft Dynamics 365 Business Central for customers, products, orders, pricing, invoices, payments, credit limits, shipments, and financial reconciliation.
• Develop secure and scalable REST APIs, background jobs, webhooks, queues, caching, logging, monitoring, and event-driven services.
• Design and optimize relational databases and large-scale data processing.
• Establish Azure cloud architecture, CI/CD, monitoring, security, backup/recovery, and disaster recovery.
• Ensure application security, including authentication, RBAC, API security, OWASP practices, encryption, audit logging, and PCI-aware payment architecture.
• Drive performance testing, scalability, integration testing, security testing, and production readiness.li>
• Conduct code reviews, mentor developers, and translate business requirements into technical solutions.

• 7+ years of professional software development experience.
• 3+ years working on complex production web applications or e-commerce platforms.
• Strong full-stack, backend/API, SQL, and relational database experience.
• Experience integrating third- party APIs and designing scalable cloud applications.
• Strong knowledge of authentication, authorization, security, reliability, monitoring, and failure recovery.
• Experience with Git and modern CI/CD practices.
• Strong troubleshooting, production debugging, communication, and technical documentation skills.
• Ability to independently translate business requirements into technical solutions.

• TD SYNNEX, Ingram Micro, or similar distributor integration experience
• Large-scale B2B e-commerce / 500K+ SKU catalogs
• Microsoft Dynamics 365 Business Central / Dynamics 365
• Azure, Azure AI Search, Elasticsearch/Open Search, Redis, Azure Service Bus
• ERP, payment gateway, tax, and shipping integrations
• B2B purchasing, Net 30/credit accounts, customer-specific and contract pricing.

This is not primarily a website-design or frontend-only role. We are looking for someone experienced in solving backend, integration, data, scalability, security, and production reliability challenges.