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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Hybrid

Copenhagen, Denmark

🏢 Summary: Senior Full Stack Developer role focused on designing, developing, and maintaining internal products for offshore wind Operations & Maintenance. The position requires strong expertise in Angular and .NET technologies, working within an Agile Scrum team and collaborating closely with Product Owners and UX Designers. This is a long-term engagement based in the Greater Copenhagen Area with a hybrid onsite setup. 🗂️ Requirements: 7-10 years of experience in design and development using Angular and .NET, Strong knowledge of .NET Core, .NET, C#, clean code principles, and object-oriented programming, Experience managing deployments in Microsoft and Azure pipelines, Experience working in Agile/Scrum methodologies, Ability to collaborate with Product Owner and UX Designer on user-centered design, User-centric mindset with understanding of user-centered design principles, Willingness to participate in code reviews and maintain code quality, Availability to work onsite at least 3 days per week, Background verification before onboarding 📃 Skills: Angular, .NET, .NETCore, C#, Azure, Microsoft, Agile, Scrum, OOP 🏢 Description: Full Stack Developer We are seeking a highly skilled Senior Software Engineer with expertise in Full Stack Development. This role involves collaborating with a team to design, develop, and maintain internal products for offshore wind Operations & Maintenance. The ideal candidate should possess significant experience in Angular and .NET technologies, demonstrating both technical proficiency and a user-centered design approach. Main Responsibilities: Deliver quality increments by collaborating with team members and stakeholders. Develop a thorough understanding of business needs and user requirements. Participate actively in Agile Scrum ceremonies. Conduct detailed code reviews for peers. Identify and advocate for improvements within the codebase. Work closely with the Product Owner and UX Designer for usability testing. Maintain effective communication within the team and across departments. Assist with product functionality and technical debt management. Key Requirements: 7-10 years of experience in design & development using Angular & .NET. Experience managing deployment in Microsoft and Azure pipelines. User-centric mindset and ability to engage with both Product Owner and users. Understanding of user-centered design principles. Experience in Agile/Scrum methodologies. Strong knowledge of .NET Core, .NET, C#, clean code principles, and object-oriented programming. Creativity and a drive to improve product features. Background verification required before onboarding. Nice to Have: Previous experience in similar offshore wind operations projects. Knowledge of additional programming languages or frameworks. Experience with user experience design and testing methodologies. Start: July 2026 End: End of may 2027 Location: Greater Copenhagen Area Onsite/remote: min. 3 days onsite per week