Full-Stack Engineer (Python / React)

Sigma Software; Warszawa; On-site; PLN 180,000 - 280,000; Full time

Job summary

Sigma Software is seeking a Middle Full Stack Engineer to join an international team building a modern Product Information Service. The role focuses on scalable cloud-native systems in the telecommunications domain, with strong Python expertise and solid React skills.

You will design, implement and maintain REST APIs and integrations, and help drive deployment automation and quality across the stack. You'll participate in agile ceremonies and collaborate with product, engineering, and

Qualifications

• 3+ years of professional software development with Python.
• Strong SQL and PostgreSQL experience.
• Proficient in TypeScript and React development.
• Experience building and maintaining RESTful APIs.
• Familiar with cloud deployment and containerized environments.

Responsibilities

• Develop back-end and front-end components for a data-intensive web system.
• Design, implement, and support REST APIs and integrations.
• Build scalable applications and database solutions.
• Write clean, maintainable, and testable code following engineering best practices.
• Create and maintain unit, integration, and end-to-end tests.
• Participate in code reviews and document technical decisions.
• Collaborate with stakeholders and teams during agile ceremonies.
• Contribute to deployment automation and performance optimization.

Skills

Python

SQL

TypeScript

React

REST APIs

Cloud concepts

Kubernetes

CI/CD

Tools

PostgreSQL

GitLab CI

Kubernetes

Azure AKS

Next.js

Job description

Looking for an opportunity to work on scalable cloud-native systems within the telecommunications domain? We are searching for a Middle Full Stack Engineer with strong Python expertise and solid React skills to join an international team building a modern Product Information Service.

CUSTOMER

Our Customer is a leading Swedish telecommunications company delivering innovative large-scale technology solutions across complex infrastructure environments. Operating internationally and serving millions of users, the company collaborates with global technology leaders to drive digital transformation initiatives and modernize enterprise connectivity services through cloud-native and data-driven solutions.

PROJECT

The team is developing a Product Information Service — a scalable cloud-native platform designed to manage product-related data and enable seamless integration across multiple systems. The solution focuses on reliable data management, API development, and distributed system integration to ensure efficient information flow between platforms.

As part of the project, you will participate in the full software development lifecycle, contributing to architecture discussions, implementation, testing, deployment, and continuous improvement initiatives within a modern engineering environment.

Job Description

• Develop and maintain Back-end and Front-end components of a web-based data-intensive system
• Design, implement, and support REST APIs and integrations with internal platforms and services
• Build and maintain scalable applications and database solutions
• Write clean, maintainable, and testable code following engineering best practices
• Create and maintain unit, integration, and end-to-end tests
• Participate in code reviews and contribute to technical documentation
• Collaborate closely with stakeholders, engineers, and product teams during regular meetings and planning sessions
• Participate in Agile ceremonies including estimation, backlog grooming, sprint planning, and retrospectives
• Contribute to system reliability, deployment automation, and performance optimization activities

Qualifications

• 3+ years of professional software development experience with Python
• Strong experience with SQL and PostgreSQL
• Working knowledge of TypeScript and React
• Experience building and maintaining RESTful APIs
• Understanding of cloud infrastructure and modern application deployment approaches
• Familiarity with Kubernetes and containerized environments
• Experience with CI/CD practices and related tools such as GitLab CI
• Understanding of software development best practices, testing approaches, and code quality standards

WILL BE A PLUS

• Experience with Next.js
• Experience with Microsoft Azure, especially AKS
• Familiarity with MCP and RAG-based systems

Additional Information

PERSONAL PROFILE

• Strong problem-solving and analytical skills
• Ability to work independently and collaboratively within distributed teams
• Good communication and stakeholder interaction skills
• Proactive mindset with attention to quality and maintainability
• Willingness to contribute to technical discussions and continuous improvement initiatives