June 12, 2026

Senior Python/React Fullstack Developer – Product Maintenance & Support

Senior • Remote

25,200 - 31,500 PLN

Warsaw, Poland

Unleash your full potential — elevate a live product by supporting, refining, and evolving real-world solutions!

EU-based opportunity with a fully remote work model (5 days/week).

As a Senior Full Stack Developer, you will be working for our client, a leading software environment where your expertise directly impacts a live, client-specific solution. You’ll support, enhance, and maintain an established product, ensuring it remains robust, user-friendly, and scalable as new users and needs emerge. This role offers a unique chance to contribute to a mission-critical platform while advancing your career in a dynamic, innovative environment.

Your main responsibilities:

  • Support ongoing development and maintenance of an existing software product.
  • Troubleshoot and resolve bugs reported during onboarding and daily usage.
  • Implement UI/UX improvements and new features based on user feedback.
  • Work across backend and frontend layers to ensure seamless functionality.
  • Collaborate with stakeholders to understand issues, prioritize improvements, and deliver practical solutions.
  • Help onboard new users by maintaining platform stability and efficiency.
  • Contribute to continuous code quality, usability, and performance enhancements.

You're ideal for this role if you have:

  • 6+ years of experience as a Full Stack Developer / Engineer.
  • Hands-on experience with Python on the backend.
  • Strong experience with React on the frontend.
  • Basic to solid understanding of databases and cloud environments, preferably Azure.
  • Knowledge of the software development lifecycle from both frontend and backend perspectives.
  • Experience maintaining and improving existing products rather than only building from scratch.
  • Ability to identify issues, debug effectively, and deliver clean, practical fixes.
  • Strong problem-solving skills with a product-minded approach.
  • Sensitivity to UI/UX and user needs.

It is a strong plus if you have: (optional)

  • Experience working on client-facing internal tools or single-client environments.
  • Enthusiasm for AI and understanding of how it works.
  • Exposure to product support, user onboarding, or post-launch optimization.
  • Familiarity with feature request handling and iterative product improvements.
  • Knowledge of cloud-based architecture in Azure.

Language required for this role:

  • Fluent English

Eligibility for the role:

  • Only candidates with an existing legal right to work in the European Union will be considered for this role.

#MAKEYourCareerBETTER
Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

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