Senior Full-Stack E-Commerce Tech Lead

Gilder Search Group; New York (NY); On-site; USD 150,000 - 210,000; Full time

Job summary

Gilder Search Group seeks a Senior Full-Stack E-Commerce Technical Lead in New York, NY, on a 1-year contract. You will architect a scalable enterprise B2B platform, lead full-stack development across storefronts, APIs, and integrations, and mentor an existing developer to deliver a production-ready system within 12 months.

You will integrate with TD SYNNEX, Microsoft Dynamics 365 Business Central, and various payment/shipping providers.

Qualifications

• 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.

Responsibilities

• 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 Elasticsearch/OpenSearch/Azure AI Search/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.
• Conduct code reviews, mentor developers, and translate business requirements into technical solutions.

Skills

Full-stack development

Backend/API design

SQL & relational DB

CI/CD

Authentication & security

Code review & mentoring

Business translation to tech

Tools

Git

CI/CD pipelines

Azure

Elasticsearch/OpenSearch

Redis

Azure Service Bus

Dynamics 365

Job description

Gilder Search Group seeks a Senior Full-Stack E-Commerce Technical Lead in New York, NY, on a 1-year contract. You will architect a scalable enterprise B2B platform, lead full-stack development across storefronts, APIs, and integrations, and mentor an existing developer to deliver a production-ready system within 12 months.

You will integrate with TD SYNNEX, Microsoft Dynamics 365 Business Central, and various payment/shipping providers.