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vkdooo

Alex B.

@vkdooo

Backend Developer: REST APIs, FastAPI, Flask, Databases

Kazakhstan
Russian, English, Italian, German
About me
Hi, I’m Alex, a backend developer focused on clean REST APIs, database design, authentication, and third-party integrations. I build reliable backends with Python, FastAPI, Flask, PostgreSQL, SQLite, Docker, JWT authentication, Stripe, Twilio, GitHub APIs, and clear documentation. My goal is to create backend systems that are simple to use, easy to maintain, and ready for real projects. I care about readable code, clear communication, and practical solutions. Message me before ordering so I can understand your project and recommend the best package.... Read more

Skills

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vkdooo
Alex B.
Offline • 

See my services

API & Integrations
I will a rest API backend with fastapi and database
From$25 / projectMore details
AI Chatbot Development
I will build a custom ai chatbot trained on your documents using rag
From$80 / projectMore details

Work experience

Tinkoff_Bank

Senior python developer

Tinkoff Bank • Full-time

Apr 2023 - Nov 2025 • 2 yrs 7 mos

As a Senior Backend Developer at Tinkoff Bank, I worked on building and maintaining reliable backend systems for high-load fintech products. My responsibilities included designing REST APIs, developing microservices, working with databases, integrating internal and external services, improving system performance, and ensuring stable operation of production services. I participated in the full development cycle: analyzing business requirements, designing technical solutions, writing clean and maintainable code, reviewing pull requests, testing backend logic, fixing production issues, and improving existing architecture. I also worked closely with product managers, QA engineers, DevOps engineers, and other developers to deliver secure and scalable financial services. During my work, I focused on performance optimization, code quality, reliability, monitoring, and maintainability. I helped improve backend stability, reduce technical debt, optimize database queries, and support the development of features used in real banking products. As a senior developer, I also helped less experienced engineers through code reviews, technical discussions, and sharing best practices in backend development, API design, database structure, and production-ready software engineering.