Senior Node.js Developer - Freelancer

Espeo Software; Województwo wielkopolskie; Remote; PLN 240,000 - 320,000; Part time

Job summary

A technology company is seeking a Senior Node.js Developer to work remotely from Poland. The role involves designing and maintaining backend services and APIs, with a focus on modern JavaScript technologies. Candidates should have over 5 years of experience, particularly with Node.js, Express.js, and database management. Competitive hourly rates of PLN 140 - 175 will be offered.

Qualifications

• 5+ years of professional experience as a backend developer.
• Excellent proficiency in Node.js and modern JavaScript (ES6+).
• Experience with Express.js or similar frameworks.

Responsibilities

• Design, build, and maintain scalable backend services using Node.js.
• Develop APIs and microservices to support frontend applications.
• Collaborate closely with frontend developers and product teams.

Skills

Node.js

Express

GraphQL APIs

Databases

Tools

Docker

AWS

GCP

Azure

Job description

We are a technology company that started its journey in 2008. Our main headquarters is located in the picturesque city of Poznań, nestled by the beautiful Malta lake. For more than 17 years, we have been assisting companies in developing and implementing innovative fintech solutions. Leveraging our expertise in areas such as blockchain, online payments, and more, our clients can invent and develop cutting‑edge solutions and services that keep them at the forefront of innovation.

Senior Node.js Developer - Freelancer

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

B2B: PLN 140 - 175 / Hour 💰

LOCATION: REMOTE (POLAND)

START DATE: 20.11.2025

END DATE: 28.11.2025

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