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Senior Fullstack Engineer (Python + React)
  • Kraków
Senior Fullstack Engineer (Python + React)
Kraków, Kraków, małopolskie, Polska
Square One Resources Sp. z o.o.
21. 3. 2026
Informacje o stanowisku

We are looking for a proactive Fullstack Software Developer to take full ownership of backend (Python) and frontend (React) development during a project transition. The role includes migrating existing functionality, shaping frontend technical direction, and working closely with engineers in a distributed Agile team. Strong frontend expertise is critical for this role, as you will play a key part in shaping the technical direction and driving frontend decisions forward. Experience with Java or Kotlin will be considered a strong advantage, while familiarity with NumPy/SciPy is a valuable plus. We’re looking for a proactive, self-driven professional who takes ownership, asks the right questions, and confidently moves initiatives from idea to execution.

About the client: Our client is a global leader in the energy sector, specializing in both subsea and surface technologies. Their mission is to enhance the performance of the world’s energy industry. They achieve this by constantly challenging conventions and investing in over 20,000 employees across 48 countries. The company strives to provide an inspiring work environment, tackling some of the worlds most complex technical and engineering challenges in collaboration with a truly global team.

Senior Fullstack Engineer (Python + React)



Your responsibilities

  • Design, develop, and maintain full-stack applications (backend & frontend)
  • Build frontend solutions using React and Material Design
  • Develop backend services (Python) and RESTful APIs
  • Design and manage PostgreSQL databases
  • Implement end-to-end testing (Playwright)
  • Manage CI/CD pipelines and repositories using GitHub Actions
  • Deploy and maintain applications in AWS
  • Ensure performance, scalability, security, and code quality
  • Collaborate in globally distributed Agile teams
  • Contribute to sustainable and energy-efficient solutions in the gas & oil industry

Our requirements

  • Bachelor’s degree in Computer Science or related field
  • 5+ years of software development experience
  • Strong knowledge of Python, React, and PostgreSQL
  • Experience with AWS infrastructure
  • Experience with GitHub Actions (CI/CD)
  • Familiarity with Playwright (or other E2E testing tools)
  • Experience with Jira and Confluence
  • Understanding of full-stack architecture and REST APIs
  • Interest in sustainable technology solutions
  • Experience with NumPy/SciPy
  • Experience with Kotlin, Java, or JavaScript backend
  • Experience mentoring junior developers
  • Interest in leveraging AI tools to improve development efficiency

 

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