SeniorSoftwareEngineerII(Python,Payments)

About SpotOn We’re not just building restaurant tech, we’re giving independent restaurants the tools to compete and win. From our award-winning point-of-sale to AI-powered profit tools, everything we do helps operators boost profit, work smarter, and keep their best people. And every solution is backed by real humans who actually give a sh*t about helping restaurants succeed. - Named the #1 Restaurant POS by G2 (Fall 2025), based on ratings from real users - Rated the top-rated point-of-sale (POS) for restaurants, bars, retail, and small businesses by Capterra users - Awarded Great Places to Work and Built In’s Best Workplaces for multiple years running We move fast, care hard, and fight for independent restaurant operators to do what they love, and love doing it. If you’re looking to make an impact with heart and hustle, SpotOn is the place for you. On a daily basis you will: - 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. What skill are we looking for? - 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 bui