Senior Fullstack Developer (Python + React)

Senior Fullstack Developer (Python + React)

Miejsce pracy: Gdańsk

Technologies we use

Expected

• Python
• React
• AWS
• Git

Operating system

• Windows

About the project

At Cyclad, we work with top international IT companies to help them deliver cutting-edge technologies that shape the future. We are currently looking for an experienced Senior Fullstack Developer to join an international team working on a state-of-the-art AI-enabled application.

In this role, you will work across the full technology stack, developing backend services and APIs using Python and modern frontend applications using React. You will contribute to transforming exploratory Proof-of-Concepts developed by Data Scientists into robust, scalable, production-ready solutions while working with Generative AI, Large Language Models (LLMs), cloud-native architectures, and intelligent process automation.

The application digitalizes and automates procurement and sourcing processes using modern AI capabilities to deliver business value at scale. You will collaborate closely with Data Scientists, AI Engineers, Cloud Engineers, Product Owners, and other Backend and Frontend Developers to build innovative end-to-end solutions.

Project information:

Type of project: IT services

Office locations: Gdańsk, Poznań, or Wrocław, Poland

Work model: Hybrid – 2 days per week in the office, 3 days remotely

Budget: 100–160 PLN net/hour – B2B

Project length: Long-term

Start date: ASAP (depending on the candidate's availability)

Seniority level: Senior

Only candidates with citizenship in the European Union and residence in Poland

Your responsibilities

• Design, develop, and maintain full stack solutions using Python and React
• Develop and maintain backend services and RESTful APIs using Python
• Build modern, responsive, and user-friendly React applications
• Integrate frontend applications with backend APIs and AI-driven functionality
• Collaborate with Data Scientists to understand exploratory POCs, models, and notebooks
• Transform experimental data science code and notebooks into production-ready, maintainable systems
• Refactor and productionize exploratory code, including Streamlit applications, scripts, and prototypes
• Implement scalable and maintainable backend business logic
• Contribute to technical design decisions across both backend and frontend architecture
• Collaborate with Cloud Engineers on deployment setup, runtime architecture, environment configuration, and CI/CD
• Support data-intensive application workflows and system integrations
• Ensure application components meet requirements for security, observability, scalability, and operational supportability
• Participate in testing, troubleshooting, performance optimization, and continuous improvement
• Work closely with Data Scientists, AI Engineers, Cloud Engineers, Product Owners, and other developers

Our requirements

• 5+ years of professional experience in full stack development
• Strong hands-on experience with both Python backend development and React frontend development
• Experience with a modern Python web framework
• Strong experience designing, building, and maintaining REST APIs
• Solid experience building modern React applications, including state management, hooks, and API integration
• Practical experience working with AWS and cloud-based application environments
• Experience transforming exploratory or experimental code into production-ready systems
• Good understanding of full stack architecture, system integration patterns, and interface design
• Experience with Git and Agile software development practices
• Understanding of scalable, secure, and maintainable application development
• Excellent communication skills in English
• Ability to work effectively in a cross-functional international team involving Data Science, AI, Backend, Frontend, Cloud, and Product stakeholders

Optional

• Experience with data pipelines or data-intensive applications
• Experience working with AI/ML-oriented systems, including inference endpoints, model-serving components, or LLM-based workflows
• Experience with Snowflake or similar cloud data platforms
• Familiarity with SAP-related interfaces or enterprise integration technologies such as OData, APIs, IDoc, RFC, or BAPI
• Experience with Docker and containerized application delivery
• Experience with CI/CD pipelines and automated deployment practices
• Knowledge of secure API design, authentication, and authorization patterns
• Experience with data visualization in React or other frontend technologies for presenting AI/ML outputs to end users

What we offer

• Hybrid working model with 2 days per week in the office
• Full-time cooperation agreement based on B2B
• Private medical care with dental care (covering 70% of costs)
• Multisport card (also for an accompanying person)
• Life insurance
• Opportunity to work on innovative AI-powered solutions in an international IT environment

Benefits

• sharing the costs of sports activities
• private medical care
• life insurance
• remote work opportunities
• flexible working time
• integration events
• dental care
• no dress code

Recruitment stages

• Introductory call
• Technical interview
• Final decision

Cyclad

In Cyclad we work with top international IT companies in order to boost their potential in delivering outstanding, cutting edge technologies that shape the world of the future.

Please enclose the following statement in your application: I hereby give consent for my personal data contained in the submitted application documents to be processed by Cyclad sp. z o.o., ul. Chłodna 48/1, 00-872 Warszawa, including my image, in relation to my participation in the recruitment process. I acknowledge that the above consent may be withdrawn at any time.
If you are interested in participating in future recruitment processes, please enclose the following statement in your application: I hereby give consent for my personal data contained in the submitted application documents to be processed by Cyclad Sp. z o.o., Cyclad sp. z o.o., ul. Chłodna 48/1, 00-872 Warszawa, including my image, in relation to my participation in future recruitment processes. I acknowledge that the above consent may be withdrawn at any time. The Personal Data Controller is Cyclad Sp. z o.o., ul. Chłodna 48/1, 00-872 Warszawa, e-mail: Wyświetl e-mail na pracuj.pl, contact with the Data Protection Officer is available via e-mail: Wyświetl e-mail na pracuj.pl. Personal data collected through job applications (CV) within the scope provided for in labor regulations shall be processed in order to allow performance of the ongoing recruitment pursuant to Art. 6(1)(a) of Regulation (EU) no. 2016/679 of the European Parliament and of the Council of 27 April 2016 on the protection of individuals with regard to the processing of personal data and on the free movement of such data, and repealing Directive 95/46/EC (further referred to as GDPR). In case of giving consent to processing of data for future recruitment processes – personal data shall be processed under the consent, pursuant to Art. 6(1)(a) of the GDPR. If the Application form contains data referred to in Art. 9(1) of the GDPR, it shall be necessary to have the candidates consent for the processing of such data (Art. 9(2)(a) of the GDPR). The consent can be revoked at any time. Withdrawal of the consent shall not affect the lawfulness of the processing that had been performed under the consent prior to its withdrawal. Personal data provided by the candidate related to: - participation in a selected recruitment process will be stored until the recruitment process is completed for a given position, - participation in future recruitment processes will be stored until the candidate's consent to the processing of their data for this purpose is withdrawn, no longer, however, than for 5 years since the last update of the candidate’s data. Personal data may be disclosed to employees or associates of the Company, entities providing support to the Company on the basis of outsourced services or in accordance with data processing agreements, to entities authorized under the law, as well as to entities collaborating with the Company within the scope of job placement, in order to conduct recruitment processes. After the employee’s consent, personal data may also be disclosed to a potential employer for whom the recruitment process is being conducted. Submission of the candidate’s personal data within the scope under Art. 221 of the Labor Code is obligatory for participation in the recruitment process. Submission of other data by the candidate is voluntary. No submission of personal data within the required scope or objection to the processing of such data shall result in lack of possibility to include the Application in the recruitment processes conducted by the Company. The candidate has the right to access and rectify the contents of their data, remove such data, limit its processing, transfer such data, submit objection to the processing and revoke the consent at any time, without affecting the lawfulness of the processing conducted under such consent before it was withdrawn. The candidate also has the right to file a complaint with the President of the Office for Personal Data Protection when they consider the processing of their personal data to be a violation of the provisions of the GDPR.