Mid/Senior Back-end Developer
Full-time
tbi bank
Join the best bank to work for in Bulgaria*
Do you want to join a well-established bank with a start-up culture? We, at tbi , have been one the most profitable banks for years and we are growing at a fast pace. We’re a bank with a long history of success that operates as a start-up and we’re always on the lookout for new opportunities to grow our business. That’s not corporate babble, it’s what our people say.
If so, we're looking for a Senior Backend Engineer to join our team on the journey to success!
We are seeking an experienced Senior Middleware (MW) Python Developer with strong expertise in Python (3.11+) to design, build, and maintain scalable, high-performance middleware services using aio This role plays a key part in developing secure and reliable backend solutions for mobile banking platforms, with a strong focus on RESTful APIs, API versioning strategies (v1/v2), backward compatibility, and distributed systems.
As a senior member of the team, you will take technical ownership, contribute to architectural decisions, and collaborate closely with cross-functional teams across multiple repositories.
Design, develop, and maintain backend and middleware services for mobile banking applications
Take ownership of middleware components and contribute to system architecture and technical decisions
Build scalable, reusable, and high-performance solutions using Python and asynchronous frameworks (aio
Ensure high availability, performance, and reliability in distributed systems
Collaborate closely with cross-functional teams (Frontend, Product, Business Analysts, QA) to deliver high-quality solutions
Actively participate in Agile ceremonies and provide technical leadership within the team
Optimize backend processes, database queries, and overall system performance
Troubleshoot complex production issues and drive root-cause analysis
Ensure compliance with security standards, banking regulations, and internal policies
Maintain clear, accurate, and up-to-date technical documentation
Contribute to continuous improvement of architecture, development practices, and team workflows
Mentor junior and mid-level developers when needed
Bachelor’s degree in Computer Science or a related technical field
- 5+ years of professional experience in Python development
- Strong hands-on experience with Python 3.11+ and asynchronous programming (aio or similar frameworks)
- Solid understanding of RESTful API design, API versioning strategies, and backward compatibility
- Experience with Java, particularly Spring Boot, is a strong advantage
- Knowledge of reactive programming concepts (WebFlux), PostgreSQL, and R2DBC
- Proven experience building and deploying applications using Docker
- Strong experience in relational database design (MSSQL, MySQL, PostgreSQL, Oracle, or similar)
- Excellent understanding of Object-Oriented Programming (OOP) principles and design patterns
- Experience working in Agile/Scrum development environments
- English proficiency at B2 level or higher
- Proven ability to collaborate effectively and provide technical guidance within a team
Get additional private health insurance
To apply for this position, please send us your CV in English.
By submitting your job application to tbi bank , you confirm that you have read the document named “Information related to personal data processing for job applicants” publicly available on tbi Career page.
Vacancy posted 26 days ago
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