Backend Engineer Internship

Metasys · Worldwide · Internship · Remote

Overview: Supply Chain API and Microservices Development
The Backend Engineer is a hands-on role responsible for the development, scaling, and maintenance of the core API services that power our entire integrated platform. You will build highly reliable, secure, and performant backend services within the NestJS modular monolith, focusing on critical supply chain logic, complex payment integrations, and the orchestration backbone for our AI agents.
Internship Details
Duration: 3 months
Start Date: Immediate
Location: Remote
Stipend: None initially. Based on your first-quarter performance, you may be offered a paid full-time opportunity, or even be absorbed directly by the client as an FTE.
Key Responsibilities & Core Projects
You will own the backend development for the most complex domain logic, ensuring scalability and transactional integrity.

• API Development & Implementation: Design, develop, and deploy highly scalable APIs for all platform components using Node.js 22 and NestJS within the TypeScript modular monolith. This includes the backends for the e-commerce checkout, internal tool APIs, and the B2B portal.

• SCM Domain Logic: Implement complex, transactional business logic within the core supply chain modules: Order Management (OMS), Warehouse Management (WMS), and Manufacturing Execution (MES). Ensure data integrity using PostgreSQL 15.

• Integrations & Payments: Implement secure, reliable integrations with third-party payment gateways and external shipping/logistics providers.

• Performance & Reliability: Implement effective caching strategies using Redis to boost API performance. Design and implement asynchronous processing and event-driven workflows to ensure system reliability and handle high-volume operations.

• Security & Monitoring: Ensure all services adhere to security standards (JWT authorization, API security). Integrate backend services with the observability stack (OpenTelemetry, Prometheus, Loki) for monitoring and t

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