Senior Python Developer
R SystemsOpis stanowiska
About the Role
As a Senior Python Developer, you will design, develop, and maintain scalable, transactional API‑based systems built on AWS, using modern development practices and full CI/CD automation. This role is highly hands‑on, focused on Python delivery, code quality, and cloud integrations. You will also participate in solution design, but without responsibilities related to team coordination or leadership. Key Responsibilities
Develop and maintain high‑performance API-based systems with a strong focus on online payment integrations
Contribute to the migration of Java-based integrations to Python
Take ownership of end‑to‑end development tasks: design, implementation, testing, performance tuning
Collaborate with Architects, Project Managers, and other engineers to ensure technical alignment and clarity
Participate in design discussions related to microservices, integrations, and cloud architecture (AWS)
Build and maintain CI/CD pipelines using Git, Jenkins (or similar)
Ensure best practices in Python development: code quality, testing, maintainability, automation
Develop, test, and debug APIs integrating with cloud systems and external services
Monitor system performance and work on improvements in scalability and reliability Requirements Technical Skills
Strong hands‑on experience with Python (senior level)
Experience working with Java is a plus (not mandatory)
Proven experience building transaction-heavy APIs (10–12 TPS or higher)
Solid understanding of AWS cloud services (usage-level; architectural knowledge is a plus)
Good understanding of microservices architecture and Kubernetes
Experience with CI/CD tools (Git, Jenkins or similar)
Hands-on experience with automated testing
Background in online payments or financial transaction systems is a strong advantage Soft Skills
Strong ownership and ability to work independently
Good communication skills and the ability to collaborate with architects, PMs, and stakeholders
Agile mindset and experience in Agile/Scrum environments Nice to Have
Experience in telecom or carrier billing platforms
Familiarity with the Google GSP ecosystem
Knowledge of adapter pattern and API gateway integrations
AWS or Kubernetes certifications
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