Сергей Разин
@0004265
I build scalable Python backend platforms for payments, cloud storage, and business systems.
ArmeniaWhat I'm looking for
I'm building a QR payment gateway and customer communication platform at Zero.kg, covering transaction lifecycles, banking integrations, idempotency, reconciliation, campaigns, templates, and delivery analytics.
Previously at Cloudike, I developed and supported a white-label cloud storage platform, including Dropbox and Google Drive integrations and customer-specific service customizations for clients such as Megafon, Beeline, Vodafone, and Cloudmax.
Over 14 years in industrial software development, I've also built inventory, document, payment, 1C:Enterprise, and retail-equipment integrations for Bigbird.ru and Formz.ru using Python and full-stack web technologies.
Experience
Work history, roles, and key accomplishments
Fintech | QR Payments & Customer Communication Platform
Built a QR-based payment gateway from scratch, covering QR generation, payment session lifecycle, and integration with banking and partner APIs.
Designed the full transaction flow with idempotency and status reconciliation to prevent double charges.
Maintained and extended the communication platform — a service for user campaigns and syste
Participated in the development and support of the Cloudike cloud storage platform.
Implemented integrations with Dropbox and Google Drive, and customized existing services to meet customers requirements.
Tech stack: Python (Pyramid, Colander, Asyncio, PyYAML, Pillow, Pytest), MongoDB, Redis, RabbitMQ, S3, Docker, Buildout, Jinja2, Sentry, Celery.
Participated in the development and support of the Bigbird.ru online inventory management system and the Formz.ru online documents service as a full-stack developer.
Tech stack: Frontend – JavaScript, jQuery, Qooxdoo; Backend – Python, CherryPy, PostgreSQL, ReportLab, Jinja, Mako, Pillow, SQLObject.
Implemented integrations with payment systems and Evotor online cash registers, developed data exch
Maintenance, support, and enhancement of 1C:Enterprise software products.
Education
Degrees, certifications, and relevant coursework
Smolensk State University
Specialist Degree in Mathematics and Computer Science Education, Faculty of Physics and Mathematics
2002 - 2007
Smolensk State University
Specialist Degree, Mathematics and Computer Science
2002 - 2007
Specialist Degree in Mathematics and Computer Science Education from Smolensk State University, completed from 2002 to 2007.
Tech stack
Software and tools used professionally
Availability
Location
ArmeniaAuthorized to work in
Job categories
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