Senior Node.js Developer - Freelancer

Senior Node.js Developer - Freelancer

SKILLS: Node.js | Express | GraphQL APIs | Databases

B2B: PLN 150 - 180 / Hour 💰

LOCATION: REMOTE (POLAND)

START DATE: 30.10.2025

PROJECT DURATION: 1 month

Key Duties and Requirements: A Roadmap to Your Professional Success 🚀

Scope of responsibilities:

• Design, build, and maintain scalable backend services using Node.js

• Develop APIs and microservices to support frontend and mobile applications

• Ensure high performance and responsiveness of backend systems

• Collaborate closely with frontend developers, DevOps engineers, and product teams

• Implement best practices in code quality, testing, and system reliability

• Optimize existing systems for performance, scalability, and cost efficiency

• Contribute to architectural decisions and technical design discussions

• Participate in code reviews

• Maintain high standards for documentation, security, and deployment processes

Here’s a set of skills we require:

• 5+ years of professional experience as a backend developer

• Excellent proficiency in Node.js and modern JavaScript (ES6+)

• Experience with Express.js, NestJS, or similar frameworks

• Strong understanding of RESTful and GraphQL APIs

• Hands-on experience with databases (SQL and NoSQL — e.g., PostgreSQL, MongoDB)

• Familiarity with containerization (Docker) and cloud environments (AWS, GCP, or Azure)

• Knowledge of CI/CD pipelines and deployment automation

• Strong focus on code quality, testing (Jest, Mocha, or similar), and best practices

• Understanding of authentication, authorization, and security principles

• Excellent problem-solving and communication skills