Lead Full-Stack Engineer – B2B eCommerce

Overview

We are seeking a Lead Full‑Stack Engineer with deep, hands‑on expertise in Next.js and Express.js to drive the development of a B2B e‑commerce platform preparing for launch. This role is for a highly technical individual contributor who owns complex problems end‑to‑end and leads primarily through direct implementation and architectural decision‑making
, not task delegation.

You will work across the entire stack—from event‑driven, React‑based front‑end experiences to secure, compliance‑aware API logic—ensuring correctness, performance, and strict data‑visibility enforcement in a regulated environment.

This position is ideal for a developer who prefers to stay close to the code
, takes personal responsibility for technical outcomes, and sets the technical bar for others through example.

• Serve as the primary technical owner of the platform’s core functionality.
• Design, implement, and refine system architecture with a focus on correctness, security, and scalability.
• Make high‑impact technical decisions and directly implement critical paths rather than delegating them.
• Review code and provide technical guidance to other engineers as needed, without functioning as a people manager.
• Build and optimize the Next.js front end
  , including:
  • React‑based, event‑driven UI patterns
  • Server‑side and client‑side rendering strategies
  • Component architecture, performance tuning, and state management
• Design, build, and maintain Express.js backend services
  , including:
  • API routing and request handling
  • Dataset retrieval driven by dynamic parameters
  • Robust data validation and error‑handling strategies

• Implement and enforce granular access‑control logic
  , ensuring correct user‑and customer‑specific data visibility.
• Own data correctness across all API responses and business workflows.
• Collaborate closely with QA and product to ensure strong test coverage, edge‑case handling, and predictable system behavior.

• Develop in alignment with CMMC objectives and secure‑by‑design principles
  .
• Ensure compliant handling of ITAR‑controlled data across two operational sites.
• Implement secure coding practices, logging, monitoring, and auditability to support compliance and production readiness.
• Partner with product management and stakeholders to translate requirements into robust technical solutions.
• Drive the platform toward production readiness and launch through direct execution.
• Coordinate with Dev Ops on environments, deployment pipelines, and operational reliability while maintaining a strong development focus.

• 5+ years of hands‑on full‑stack development experience with strong proficiency in:
  • Next.js (React‑based)
  • Node.js & Express.js
• Demonstrated ability to personally design and implement complex systems
  , not just oversee them.
• Strong experience with:
  • Event‑driven UI patterns
  • REST API design and integration
  • Secure data handling and fine‑grained access‑control logic
• High attention to detail, particularly around data correctness, authorization, and edge cases.
• Proven delivery of production‑ready web applications.
• Clear communicator who can influence technical outcomes through code and technical reasoning.

• Experience working in regulated or security‑focused environments.
• Familiarity with:
  • CMMC compliance frameworks
  • ITAR data handling requirements
• Experience with B2B, enterprise, or multi‑tenant platform design.
• Strong working knowledge of relational databases (e.g., Postgre
  
  SQL, SQL Server).
• Exposure to cloud platforms such as Azure or AWS.
• Experience implementing RBAC or ABAC models.
• Knowledge of event‑driven backend patterns (queues, workers).
• Practical Dev Ops familiarity (CI/CD, containerization, infrastructure as code).