Senior Software Engineer II (Python, Payments)

Our requirements

• You’ve spent 5–7 years building production systems, with at least 3 years working deeply in Python.
• You are willing to work in a hybrid setup, coming into our Kraków or Gdańsk office 2–3 times per week.
• You are highly proficient in Python and at least one modern framework (Django, FastAPI, or Flask), and you take ownership of what you build—from design through production.
• You have strong experience building and consuming APIs, and understand how systems communicate, fail, and scale in real-world environments.
• You are comfortable with both SQL and NoSQL databases, and can analyze data, write efficient queries, and reason about performance.
• You write clean, maintainable code and apply solid engineering principles and design patterns consistently.
• You use AI tools as part of your daily workflow to move faster, solve problems, and improve code quality.
• You are familiar with modern infrastructure and deployment practices, including AWS, Kubernetes, and Terraform, and understand how your code behaves in production.
• You have a solid command of English (min. B2) and are ready to collaborate in person at our Kraków or Gdańsk offices 2-3 times a week.

Your responsibilities

• Own backend systems end-to-end—from design and implementation to deployment and monitoring.
• Build, improve, and maintain services to support real-world transaction flows with a focus on reliability and performance.
• Design and evolve APIs, ensuring they are scalable, resilient, and easy to integrate with.
• Collaborate with engineers and stakeholders to define solutions, address system limitations, and make sound technical decisions.
• Identify and resolve performance bottlenecks, bugs, and edge cases in production environments.
• Participate in code reviews, mentor engineers, and raise the bar on code quality and best practices.
• Proactively identify technical debt and drive improvements before they become blockers.

This is how we work on a project

• Continuous Deployment
• Continuous Integration

Development opportunities we offer

• development budget
• external training
• industry-specific e-learning platforms

What we offer

• Competitive pay: 23 800 - 29 800 PLN net on B2B.
• Training budget 3500 PLN gross per year.
• Access to e-learning platforms (O’Reilly).
• Fully paid private healthcare in LuxMed.
• Access to the Worksmile platform with a monthly top-up.
• Subsidized access to breakfast and lunch through the vending machine in Kraków office, and lunches in Gdańsk office once a week.
• Group English classes with a native speaker.
• New Macbook Pro, 4K monitors or whatever tools you need.
• Flexible working hours.
• New, modern, bright and comfortable office space in the city centre.
• Access to the company’s library.
• Great working atmosphere.
• Chill out room with a PlayStation and games.
• Free snacks and beverages in a kitchen.
• Company parties and social activities.
• Employee referral program.
• Relocation Package within Poland.

Benefits

• sharing the costs of sports activities
• private medical care
• sharing the costs of professional training & courses
• flexible working time
• corporate library
• no dress code
• video games at work
• drinks
• leisure zone
• meal passes
• employee referral program

SPOTON POLAND SPÓŁKA Z OGRANICZONĄ ODPOWIEDZIALNOŚCIĄ