Senior Python Developer

R Systems is searching for an experienced Senior Python Developer to join our team of innovators!

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.

If you’re passionate about coding and eager to take on new challenges, we want to hear from you!

Your contribution:

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

Bring along:

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

The working schedule is 8 hours per day, Monday to Friday, and is carried out in a hybrid regime, involving presence in the office for 2 out of the 5 working days. A different number of days of presence in the office may be required in the future, depending on local or global policies.

What's in it for you:

Hybrid work policy

A hybrid work policy, to promote and improve work-life balance! We’ll also provide the proper work equipment to ensure there is no digital barrier you can’t break.

Health coverage

Stay healthy and feel always in safe hands with full access to private medical subscription.

Professional development

Keep your knowledge fresh and achieve your professional goals, with free and unlimited access to Udemy online learning platform.

Building a community

If you know some awesome & talented innovators, recommend them to us and you’re in for a neat referral bonus. We also hope you’ll genuinely like us enough to stick around and enjoy our long-term contribution rewards.

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People-centered offices

Our offices are not only hip and cool, with private and co-working spaces, but also situated in central city locations, so that you can get there easily. Coming to the office is also a great opportunity to enjoy some fun activities in the company of your colleagues.

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Food for thought

To feed both your body and brain, we like to organize occasional Lunch & Learn sessions. If these leave you hungry for more, you can always enroll in our mentoring & coaching sessions.

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Healthy rivalry

Running shoes are not included in your welcome kit, but you may need to get a pair ASAP because we take our (inter)company sports competitions very seriously. And if you're competitive but sports are not your forte, you can always join our hackathons or reading marathons.

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A chance to give back

If you’re a charitable soul like us you’ll enjoy planting trees, baking cakes, playing chess, crafting, or donating to a cause in our social community events.

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Lots of fun

Our awesome people may be spread across many countries & cities, but we like to team up for some fun as often as we can. Be it team buildings, parties, or other team events, we take on every opportunity to meet and strengthen our sense of community.

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Who we are as a company:

R Systems is a global technology and analytics services company. We help our clients achieve speed-to-market, overcome digital barriers, and create business value with our specialized service offerings and consultative business approach.

We speak the language of business as fluently as we do the language of technology. In other words: We speak Digital. Our goal: accelerate our clients’ digital leadership.

At R Systems EU, we embrace diversity. Inclusion is a priority for us, and we are eager to foster an environment where everyone feels valued. We welcome applications regardless of ethnicity or cultural background, age, gender, nationality, religion, disability or sexual orientation.