Senior Fullstack Developer - Freelancer

Espeo Software; Województwo wielkopolskie; Remote; PLN 120,000 - 180,000; Part time

Job summary

A leading technology company in Poland is seeking a Senior Fullstack Developer to work remotely. The role involves designing and maintaining scalable backend services with Node.js and developing frontend features using Angular. Ideal candidates have extensive experience, including hands-on work with Auth0 for secure authentication. This position offers competitive hourly pay and an opportunity to work on innovative fintech solutions.

Qualifications

• 5+ years of professional development experience, with a strong focus on Fullstack roles.
• Expert proficiency in Node.js for building scalable backend services (RESTful APIs).
• Proficiency in Angular for complex, single‑page application development.
• Mandatory hands‑on experience with Auth0 for implementing secure authentication and authorization.

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.
• Design and implement frontend features using Angular.

Skills

Node.js

Angular

Auth0

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 Fullstack Developer - Freelancer

SKILLS: Node.js | Angular | Auth0 |

B2B: PLN 140 - 160 / Hour 💰

LOCATION: REMOTE (POLAND)

START DATE: 01.12.2025

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
• Design and implement frontend features using Angular and ensure high performance, responsiveness, and a great user experience.
• Auth0: Hands‑on experience integrating and configuring identity and access management (IdM) in Node.js / Angular applications.
• Implement and manage API key security mechanisms for third‑party service integration and internal service‑to‑service communication.
• Collaborate with product owners and other developers to define, design, and ship new features.
• Conduct code reviews to maintain high standards of code quality, performance, and security across the stack.
• Maintain high standards for documentation, security, and deployment processes.

Here’s a set of skills we require:

• 5+ years of professional development experience, with a strong focus on Fullstack roles.
• Expert proficiency in Node.js for building scalable backend services (RESTful APIs).
• Proficiency in Angular for complex, single‑page application development.
• Mandatory hands‑on experience with Auth0 for implementing secure authentication and authorization.
• Architecture: Ability to work with existing codebases, suggest improvements, and maintain clean code standards.