Backend Engineer

The core responsibilities for the job include the following:

Technical Leadership:

• Own backend architecture for the A2ZPOS platform: API design, service boundaries, data models, and integration patterns.
• Define and enforce engineering standards: code review practices, testing strategy, CI/CD, documentation, and release discipline.
• Lead technical planning and estimation with product and engineering leadership.
• Mentor backend engineers through code reviews, pairing, and career growth.
• Design and develop scalable backend systems for POS operations across retail, restaurants, and multi-location merchants.
• Build and maintain secure, high-performance RESTful APIs for web, mobile, and in-store clients.
• Own modules for sales transactions, inventory, customer management, loyalty, and reporting data feeds.
• Integrate payment gateways, POS hardware services, and third-party business systems.
• Optimize MySQL (and future PostgreSQL) for high-volume transactional workloads and reporting use cases.
• Implement authentication, authorization, and multi-tenant data isolation best practices.

Migration and Modernization:

• Lead incremental migration from the Laravel monolith to modern service architecture (e. g., NestJS/TypeScript services).
• Define API contracts and integration boundaries between legacy and new services.
• Identify high-risk areas (payments, inventory sync, reporting) and prioritize safe migration paths.

Requirements:

• Strong hands-on experience with Node, NestJS, PHP, and Laravel (current production stack).
• Expertise in MySQL: schema design, indexing, query optimization, transactions, and data integrity at scale.
• Strong understanding of RESTful API development.
• Experience working with POS, retail, restaurant, ERP, inventory, or e-commerce applications and payment gateway integrations.
• Authentication and authorization: JWT, OAuth, role-based access, multi-tenant scoping.
• Strong understanding of database indexing, transactions, and data integrity.
• Git, code review workflows, and collaborative development practices.
• Familiarity with Linux-based deployment environments.