Senior Full-Stack Engineer for AI-Driven eCommerce

BEL USA LLC; Miami (FL); On-site; USD 120,000 - 180,000; Full time

Job summary

BEL USA LLC is seeking a Senior Full-Stack Software Engineer to design, build, and maintain scalable software across the stack. You will collaborate with Product, Design, and leadership to shape technical direction and improve platform performance.

Responsibilities include API design, front-end development with React, and ensuring security and reliability in production systems. This role requires ownership, strong testing, and on-call participation.

Qualifications

• Bachelor's degree in computer science or related field.
• 5+ years of professional software engineering experience, including ownership of production systems.
• Experience with Node.js, React, and TypeScript, including component architecture and testing.
• Experience designing APIs, asynchronous patterns, and scalable back-end services.
• Solid web fundamentals: HTTP, caching, security headers, OAuth/OIDC, secure coding.
• Strong SQL and NoSQL database design, migrations, and performance optimization.

Responsibilities

• Design and build modern eCommerce services within a scalable, secure platform.
• Develop high-quality front-end interfaces using React or similar frameworks.
• Implement and maintain APIs, data models, microservices, and background workers.
• Design and optimize SQL/NoSQL schemas, queries, and data performance.
• Own the full development lifecycle: design, coding, reviews, testing, deployment, and docs.
• Write clean, well-tested code aligned with engineering standards.
• Instrument applications with logging, metrics, tracing, and reliable alerting.
• Build with security, privacy, and performance in mind from the start.
• Participate in on-call rotations and drive reliability improvements.
• Collaborate with cross-functional teams and review culture.

Skills

Node.js

React

TypeScript

API design

SQL/NoSQL

Testing

Security

On-call

Education

Bachelor's degree in computer science or related field

Tools

React Testing Library

Playwright

OAuth/OIDC

Job description

BEL USA LLC is seeking a Senior Full-Stack Software Engineer to design, build, and maintain scalable software across the stack. You will collaborate with Product, Design, and leadership to shape technical direction and improve platform performance.

Responsibilities include API design, front-end development with React, and ensuring security and reliability in production systems. This role requires ownership, strong testing, and on-call participation.