Senior Python Developer (f/m/x)

Sii Poland; Bydgoszcz; On-site; PLN 180,000 - 250,000; Full time

Benefits offered by this job

Great Place to Work

Profit sharing

Medical care

Centre of internal trainings

Many experts you can learn from

Open management

Job summary

Sii Poland is seeking a Senior Python Developer to join a remote team focused on cloud-native software for large-scale telecom networks, including 5G. You will contribute to the full software lifecycle, build microservices and REST APIs, and analyze network data to support RAN optimization and self-healing use cases.

The role requires strong Python skills, experience with Linux and containers, and excellent Polish and English communication abilities.

Qualifications

• 7+ years of software development experience.
• Strong Python 3 programming skills.
• Experience designing production-grade software.
• Experience with Linux, containers, and Kubernetes.
• Proficient in automated testing (pytest or similar).
• Proficient in English and Polish.

Responsibilities

• Participate in all stages of the software development lifecycle.
• Develop cloud-native microservices and REST APIs.
• Process and analyse network configuration, performance, and telemetry data.
• Write unit, integration, and system tests to ensure quality.
• Troubleshoot applications in Linux and Kubernetes environments.
• Evaluate new technologies and contribute to PoC activities.
• Collaborate with cross-functional teams to deliver software solutions.

Skills

Python 3

Software design

Automated testing

Linux development

Docker & Kubernetes

Microservices

Web APIs

Relational databases

AI coding tools

Polish language

English language

Tools

pytest

Linux

Docker

Kubernetes

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