Senior Python Developer (f/m/x)

Sii Poland; Warszawa; On-site; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Great Place to Work

Solid financial situation

Contracts with the biggest brands

Centre of internal trainings

Many experts you can learn from

Open and accessible management team

Profit sharing

Passion Sponsorship program

Regular integration events and trips

Comfortable and well-equipped offices

MySii app

Medical care

Job summary

Sii Poland is seeking a Senior Python Developer to join our team focused on cloud-native software for large-scale telecommunications networks, including 5G. You will participate in the full SDLC, collaborating with a diverse team of software developers, system engineers, data scientists, and telecom experts.

This remote role offers the opportunity to work on innovative applications that analyze network data and support use cases such as RAN optimization and network self-healing.

Qualifications

• 7+ years of software development with Python.
• Production-quality software design and maintenance experience.
• Automated testing with pytest or similar frameworks.
• Linux-based development and debugging skills.
• Familiarity with containers, Docker & Kubernetes.
• Experience building microservices or web APIs with relational databases.
• Strong problem-solving and debugging abilities; good English and Polish.

Responsibilities

• Participating in the full software development lifecycle from analysis to deployment.
• Developing cloud-native microservices and REST APIs.
• Processing and analyzing network configuration, performance and telemetry data.
• Writing unit, integration, and system tests to ensure quality.
• Troubleshooting in Linux and Kubernetes environments.
• Evaluating new technologies and contributing to PoCs.
• Collaborating with cross-functional teams to deliver impactful software solutions.

Skills

Python

pytest

Linux

Docker

Kubernetes

Microservices

Relational databases

Problem solving

Polish

English

Tools

REST API

SQL databases

Job description

We are looking for a skilled Senior Python Developer to join our team focused on developing cloud-native software solutions for large-scale telecommunications networks, including 5G technologies. You will participate in the entire software development lifecycle, collaborating with a diverse team of software developers, system engineers, data scientists, and telecommunications experts. This remote role offers the opportunity to work on innovative applications that analyze network data and support use cases such as RAN optimization and network self-healing.

Your tasks

• Participating in the complete software development lifecycle, including requirements analysis, solution design, implementation, testing, and deployment
• Developing cloud-native microservices and REST APIs
• Processing and analyzing network configuration, performance, and telemetry data
• Writing unit, integration, and system tests to ensure software quality
• Troubleshooting application behavior in Linux and Kubernetes environments
• Evaluating new technologies and contributing to research and proof-of-concept activities
• Collaborating with cross-functional teams to deliver impactful software solutions

Requirements

• Minimum 7 years of experience in software development with strong programming skills in modern Python 3
• Experience in designing, implementing, and maintaining production-quality software
• Practical knowledge of automated testing using pytest or similar frameworks
• Experience with Linux-based software development and troubleshooting
• Understanding of containers, Docker, and Kubernetes fundamentals
• Experience in developing microservices or web APIs and familiarity with relational databases
• Good problem-solving and debugging skills, along with the ability to use AI coding tools effectively
• Advanced level of Polish and English

Nice to have

• Experience in developing software for telecommunications systems, particularly 4G or 5G RAN
• Knowledge of Kubernetes networking, ingress, storage, and security concepts
• Familiarity with public or private cloud platforms and experience with data analysis or machine learning
• Experience with message brokers or event-driven architecture

Job no. JOB-7UBPM

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.

Benefits For You

• Great Place to Work
• Solid financial situation
• Contracts with the biggest brands
• Centre of internal trainings
• Many experts you can learn from
• Open and accessible management team
• Profit sharing
• Passion Sponsorship program
• Regular integration events and trips
• Comfortable and well-equipped offices
• MySii app
• Medical care