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Urgent! Senior Full Stack (Python (FastAPI) + React) developer Job Opening In Poland, Poland – Now Hiring instinctools

Senior Full Stack (Python (FastAPI) + React) developer



Job description

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*instinctools is a software development company that provides custom software solutions for businesses of all sizes.

Our team works closely with clients to understand their specific needs and provide personalized solutions that meet their business requirements.

Our team is looking for a Senior Full Stack (Python (FastAPI) + React) developer for one of our clients.

Our customer is one of the TOP-5 global management consulting firms considered to be among the most prestigious ones in the world.

Hundreds of customers from Fortune-, including the largest global financial institutions, the world’s top media companies, technology companies and federal government agencies rely on our Client’s proven platform and services.

The project : This project involves a proprietary advanced analytical solution designed to enhance the productivity and efficiency of industrial processing plants through the application of AI and machine learning (ML).

The solution offers a modular, production-ready analytics pipeline with pre-built templates and industry-specific recipes.

It provides real-time AI-based advisory systems to help control room operators optimize plant settings.

The system utilizes algorithms for data engineering, prediction, and optimization, with over 10, lines of code specifically tailored for processing operations.

Our expectations of the candidate: 

  • 5+ years of experience with Python and frameworks like FastAPI or Flask/Django;

  • Proficiency in relational databases (PostgreSQL), ORM tools (SQLAlchemy), and query optimization;

  • Experience building RESTful APIs and microservices architecture;

  • Advanced skills in React with TypeScript, state management (Redux/Context API), and modern UI/UX practices;

  • Strong knowledge of SCSS/CSS-in-JS for styling and Playwright for end-to-end testing.

  • Hands-on experience with Docker containerization and orchestration;

  • Cloud platforms: AWS (preferred) with infrastructure-as-code tools like Terraform;

  • Deployment and management of services using ECS, Lambda, or similar.

  • English: Upper-Intermediate

    Responsibilities and tasks:

  • Architect, develop, and maintain scalable backend services and APIs using Python/FastAPI;

  • Design and implement responsive, user-centric frontend interfaces with React/TypeScript;

  • Optimize database performance and manage complex queries using PostgreSQL and SQLAlchemy;

  • Collaborate with DevOps to streamline CI/CD pipelines (GitHub Actions, CircleCI, Travis) and cloud deployments (AWS);

  • Write clean, maintainable code and ensure adherence to best practices in security, testing, and documentation;

  • Mentor junior developers and participate in code reviews to uphold code quality;

  • Work closely with product and design teams (e.g., Figma) to translate wireframes into functional features.

  • We offer:

  • flexible working time;
  • professional and ambitious team;
  • transparent system of professional and career development;
  • learning opportunities, seminars and conferences and time for exploring new technologies;
  • the opportunity to realize your potential outside the projects: we arrange meetups and conferences where our staff can perform, develop professional communities;
  • co-funding for language courses (English).
  • Join us and be part of a team that is changing the world through technology.

    Important Notice Regarding Your Personal Data Security

    At *instinctools, we take the security of your personal data very seriously.

    Please be informed that all official communication, offers, and correspondence from *instinctools are conducted only through our verified company resources, including:

    Official Email Domain:
    Company Website: 


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