Open to opportunities

Александр Каравайчик

@0002540

Message

Python backend developer with 3+ years building FastAPI/Django microservices and ERP-integrated APIs.

Russian Federation

Message

What I'm looking for

I’m looking for a mid-to-high impact backend role where I can build FastAPI/Django services, own integrations, and improve performance. I value teams that ship quickly, measure results, and support clean architecture and maintainable code.

I’m an experienced Python backend developer specializing in API integrations and ERP systems, with a strong focus on building both microservices and monolithic applications using FastAPI and Django. I enjoy turning complex workflows into reliable, maintainable backend services that directly improve performance and user outcomes.

In my recent work, I improved receipt uploading automation and boosted OCR performance by 20% while reducing recognition errors, and I contributed to internal tools on Frappe. I also managed backend development for healthcare projects, implementing modules for operating rooms and surgery workflows, improving query performance with Redis caching (12–25%), and shipping updates across the Vista-Med ecosystem—plus I reduced bugs by 45% after delivering a Rust-based tool into the update pipeline.

Experience

Work history, roles, and key accomplishments

Backend Developer

ADR

Oct 2025 - Mar 2026 (5 months)

Improved receipt uploading efficiency by automating the process and rewrote an OCR service to update the recognition model, boosting performance by 20% and reducing recognition error rate. Contributed to the development and maintenance of internal tools on Frappe.

Python Optical Character Recognition Frappe Automation Performance Tuning

Backend Developer

Vista-Med

Apr 2024 - Sep 2025 (1 year 5 months)

Provided technical support and implemented the Vista-Med system modules using Python and FastAPI/Flask, including backend development for an operating room project. Built performance improvements with Redis caching (12–25% faster queries), implemented key modules (e.g., Blood Transfusion Room), and reduced bugs by 45% via a Rust-based template linter integrated into the update pipeline.

Python fastAPI Flask SQLAlchemy SQL Redis Django Java Rust REST APIs

Backend Developer

KT-Segment

Oct 2022 - Sep 2024 (1 year 11 months)

Developed, implemented, and supported a REST API for the 1C:MES system and integrated it with client applications. Delivered mobile application functionality and UI/UX for the 1C:MES ecosystem and built an internationalization system prototype in Rust.

Python fastAPI SQLAlchemy REST API Development 1C:MES Integration React Native JavaScript Rust Mobile Development UI UX

Education

Degrees, certifications, and relevant coursework

Санкт-Петербургский технический колледж управления и коммерции

Программист, администратор баз данных, Информационные системы и программирование

Средне-специальное образование по информационным системам и программированию; подготовка по специальности программист и администратор баз данных, завершено в 2025 году.