Lead Full-Stack Engineer

Salary: $150,500-$178,000

We are seeking a Lead Full-Stack Engineer with deep, handson expertise in Next.js and Express.js to drive the development of a B2B ecommerce platform preparing for launch. This role is for a highly technical individual contributor who owns complex problems endtoend and leads primarily through direct implementation and architectural decisionmaking, not task delegation.

You will work across the entire stack from eventdriven, Reactbased frontend experiences to secure, complianceaware API logic ensuring correctness, performance, and strict datavisibility 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.

Key Responsibilities

HandsOn Technical Ownership

• 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 highimpact 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.

FullStack Development

• Build and optimize the Next.js front end, including:
  • Reactbased, eventdriven UI patterns
  • Serverside and clientside 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 errorhandling strategies

Platform & Data Integrity

• Implement and enforce granular accesscontrol logic, ensuring correct user and customerspecific data visibility.
• Own data correctness across all API responses and business workflows.
• Collaborate closely with QA and product to ensure strong test coverage, edgecase handling, and predictable system behavior.

Security & Compliance

• Develop in alignment with CMMC objectives and securebydesign principles.
• Ensure compliant handling of ITARcontrolled data across two operational sites.
• Implement secure coding practices, logging, monitoring, and auditability to support compliance and production readiness.

Collaboration & Delivery

• 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 DevOps on environments, deployment pipelines, and operational reliability while maintaining a strong development focus.

Qualifications

Required

• 5+ years of handson fullstack development experience with strong proficiency in:
  • Next.js (Reactbased)
  • Node.js & Express.js
• Demonstrated ability to personally design and implement complex systems, not just oversee them.
• Strong experience with:
  • Eventdriven UI patterns
  • REST API design and integration
  • Secure data handling and finegrained accesscontrol logic
• High attention to detail, particularly around data correctness, authorization, and edge cases.
• Proven delivery of productionready web applications.
• Clear communicator who can influence technical outcomes through code and technical reasoning.

Preferred

• Experience working in regulated or securityfocused environments.
• Familiarity with:
  • CMMC compliance frameworks
  • ITAR data handling requirements
• Experience with B2B, enterprise, or multitenant platform design.
• Strong working knowledge of relational databases (e.g., PostgreSQL, SQL Server).
• Exposure to cloud platforms such as Azure or AWS.

NicetoHave

• Experience implementing RBAC or ABAC models.
• Knowledge of eventdriven backend patterns (queues, workers).
• Practical DevOps familiarity (CI/CD, containerization, infrastructure as code).