Senior Full Stack Software Engineer

BEL USA LLC is seeking a Senior Full-Stack Software Engineer to design, build, and maintain scalable software systems for its growing business. The role develops secure eCommerce features across front-end, back-end, APIs, and databases while partnering with Product, Design, and Engineering leadership to improve platform performance, engineering standards, and reliability.

Responsibilities:

• Design and build modern eCommerce services within a scalable, secure, AI-driven 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 overall data performance
• Own the full development lifecycle: design, coding, code reviews, testing, deployment, and documentation
• Write clean, maintainable, well-tested code aligned with engineering standards
• Instrument applications with logging, metrics, tracing, and contribute to reliable alerting and runbooks
• Build with security, privacy, and performance in mind from the start
• Participate in on-call rotations and drive reliability improvements through post-incident reviews
• Collaborate effectively with cross-functional teams and contribute to a strong engineering and review culture

Requirements:

• Bachelor's degree in computer science or related field
• Minimum of 5 years of professional software engineering experience, including ownership of production systems
• Hands-on experience with Node.js, React, and TypeScript, including component architecture, state management, data-fetching patterns, forms, accessibility, profiling, and testing (e.g., React Testing Library, Playwright)
• Experience designing and implementing APIs, asynchronous patterns, and scalable back-end services
• Solid foundation in web fundamentals: HTTP, caching, cookies, security headers/CSP, OAuth/OIDC, secure coding
• Strong experience with SQL and NoSQL database design, migrations, and performance optimization
• Demonstrated ability to ship reliable, observable, maintainable software and collaborate with Product and Design teams
• Only applicants authorized to work in the U.S. need apply
• BEL USA does not sponsor applicants or employees for work authorization, e.g., H-1B, or for permanent residence