Senior Python Consultant with React (Kraków, PL, 30-302)

GFT Technologies SE; Polska; Hybrid; PLN 172,000 - 220,000; Full time

Job summary

GFT Poland Sp. z o.o. is seeking an experienced backend engineer to build scalable web applications in Python with FastAPI and to work across the stack with React. You will design robust APIs, optimize PostgreSQL/Redis databases, and deploy using AWS, Docker, and Kubernetes in a hybrid work setup including Kraków.

The role emphasizes CI/CD, automated testing, and exploration of GenAI features with LangChain/OpenAI APIs. Strong Python and API design skills are essential.

Qualifications

• Strong Python engineering experience.
• Hands-on experience with FastAPI or similar Python web frameworks.
• Experience building web UIs with React.
• Solid understanding of RESTful API design and backend development.
• Practical SQL skills and experience with PostgreSQL.
• Experience with Redis or other NoSQL solutions.
• Experience with Docker and container-based development.
• Experience with Kubernetes or strong motivation to learn it quickly.
• Experience working with AWS in production or near-production environments.
• Experience with CI/CD pipelines and automated testing.
• Openness to hybrid work 6 days a month from our client office (Kraków).

Responsibilities

• Develop scalable web applications using Python with FastAPI.
• Build user-facing functionality and work across the stack with React.
• Design and optimize relational and non-relational databases including PostgreSQL and Redis.
• Implement vector search solutions using PGVector where applicable.
• Develop and maintain RESTful APIs and backend services.
• Work with AWS services to deploy and operate applications.
• Containerize services using Docker and orchestrate workloads with Kubernetes.
• Apply CI/CD practices and maintain automated test suites.
• Collaborate with engineers and stakeholders to deliver increments end to end.
• Explore or contribute to GenAI-enabled features using tools such as LangChain and OpenAI APIs

Skills

Python

FastAPI

React

REST API

PostgreSQL

Redis

Docker

Kubernetes

AWS

CI/CD

Hybrid work Kraków

Tools

LangChain

OpenAI APIs

Job description

Type of contract: B2B contract

Salary range: 125-160 PLN/H

What will you do?

You will build and evolve scalable web applications in Python and work across the stack with React to deliver high-quality features. You will design data solutions, develop robust APIs, and collaborate closely with the team to ship reliably using CI/CD and automated testing, with an option to explore GenAI use cases.

Your tasks

• Develop scalable web applications using Python with FastAPI.
• Build user-facing functionality and work across the stack with React.
• Design and optimize relational and non-relational databases including PostgreSQL and Redis.
• Implement vector search solutions using PGVector where applicable.
• Develop and maintain RESTful APIs and backend services.
• Work with AWS services to deploy and operate applications.
• Containerize services using Docker and orchestrate workloads with Kubernetes.
• Apply CI/CD practices and maintain automated test suites.
• Collaborate with engineers and stakeholders to deliver increments end to end.
• Explore or contribute to GenAI-enabled features using tools such as LangChain and OpenAI APIs

Requirements

• Strong Python engineering experience.
• Hands‑on experience with FastAPI or similar Python web frameworks.
• Experience building web UIs with React.
• Solid understanding of RESTful API design and backend development.
• Practical SQL skills and experience with PostgreSQL.
• Experience with Redis or other NoSQL solutions.
• Experience with Docker and container-based development.
• Experience with Kubernetes or strong motivation to learn it quickly.
• Experience working with AWS in production or near-production environments.
• Experience with CI/CD pipelines and automated testing.
• Openness to hybrid work 6 days a month from our client office (Kraków).

Nice to have

• Experience with PGVector or vector databases.
• Experience building GenAI applications using LangChain.
• Experience integrating or using OpenAI APIs or similar LLM providers.
• Experience with modern observability tooling such as logging metrics and tracing.
• Experience with performance tuning and scalability for high-traffic systems

GDPR clause

Based on Regulation (EU) 2016/679 of the European Parliament and of the Council of 27 April 2016 on the protection of natural persons with regard to the processing of personal data and on the free movement of such a data and repealing Directive 95 /46/EC (known as a “GDPR”), I hereby give consent to GFT Poland Sp. z o.o. (90-118 Łódź, ul. Kilińskiego 66) to process my personal data for the purpose of: a) ongoing recruitment process for the position I am applying; b) recruitment processes organized in the future.