Senior Python Engineer: APIs & Data Pipelines, Cybersec

Sii Poland; Kraków; Hybrid; PLN 200,000 - 320,000; 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 in Cracow is seeking a Senior Python Engineer to join our team and work closely with cybersecurity experts on software for banking services. You will design REST APIs, build data pipelines, and automate testing while mentoring junior developers and driving improvements.

We value strong Python experience (FastAPI/Flask/Django), microservices, Docker/Kubernetes mastery, and solid Linux skills. You will work from the Kraków office six times per month in a hybrid setup.

Qualifications

• 5+ years of Python web development experience.
• Strong knowledge of microservices (CQRS, SAGA, event sourcing).
• Experience with Docker and Kubernetes.
• Proficient in SQL and complex queries.
• Experience with cloud data warehouses (BigQuery/Redshift).
• Solid Linux systems administration and networking basics.
• Familiar with Git and branching strategies.
• Frontend basics: HTML, CSS, JavaScript.
• Experience with Jira and Confluence in DevSecOps workflows.
• Advanced English ability.

Responsibilities

• Design, develop, and deploy REST API services for internal users.
• Build data pipelines and ETL jobs to support data integration.
• Collaborate with cybersecurity experts to refine requirements.
• Adhere to microservice design for scalable and maintainable services.
• Conduct L2/L3 troubleshooting and bug fixing for existing services.
• Write automated tests and technical documentation.
• Perform peer reviews and mentor junior developers.
• Identify bottlenecks and propose process improvements.

Skills

Python

Microservices

SQL

Linux

Git

English

Tools

Docker

Kubernetes

Jira

Confluence

BigQuery

Job description

Sii Poland in Cracow is seeking a Senior Python Engineer to join our team and work closely with cybersecurity experts on software for banking services. You will design REST APIs, build data pipelines, and automate testing while mentoring junior developers and driving improvements.

We value strong Python experience (FastAPI/Flask/Django), microservices, Docker/Kubernetes mastery, and solid Linux skills. You will work from the Kraków office six times per month in a hybrid setup.