4Bell Technology

Job Description

Key Responsibilities:
• Develop and maintain backend services using NestJS and TypeScript.
• Design and implement scalable RESTful APIs.
• Build modular, reusable, and maintainable code following best practices.
• Implement authentication, authorization, and security standards.
• Integrate databases (MySQL / PostgreSQL) and optimize queries.
• Ensure application performance, reliability, and scalability.
• Write clean, testable, and well-documented code.
• Collaborate with frontend developers, DevOps, and QA teams.
• Troubleshoot, debug, and upgrade existing applications.
Required Technical Skills:
Core Skills
• Strong proficiency in NestJS
• Solid understanding of TypeScript
• Experience in building RESTful APIs
• Knowledge of Dependency Injection
• Experience with Middleware, Guards, Interceptors, Pipes
• DTO validation and request handling
Database
• Hands-on experience with MySQL or other relational databases
• Query optimization and indexing Architecture & Design
• Understanding of Clean Architecture
• Knowledge of SOLID principles
• Experience in modular and scalable application design