// Subject Classification: Backend Systems Engineer

SAYOMIYORI

Python Backend Developer

$ stack: FastAPI · Django · PostgreSQL · Redis · Docker

$ patterns: Microservices · Event-driven · CI/CD · Observability

$ brokers: RabbitMQ · Redis Pub/Sub · Celery

$ status: OPEN TO OPPORTUNITIES_

View Projects GitHub →

Scroll

Subject Dossier

Classification // Developer Profile● Online

Sayomiyori

Backend Engineer

FunctionPython Backend Developer

LocationSimferopol / Remote

EducationCrimean Federal University

Projects7 repositories

StatusOpen to opportunities

// Primary Focus Areas

Microservices — Django + FastAPI + RabbitMQ

Event-driven architecture & message brokers

CI/CD pipelines, Docker, Observability

WebSockets & real-time systems

Clean Architecture & production-ready code

Tech Stack

// Backend

Python 3.12

FastAPI

Django / DRF

Celery

asyncio

// Data

PostgreSQL

Redis

RabbitMQ

SQLAlchemy 2

Alembic

// Infra

Docker

Nginx

GitHub Actions

Linux

Railway

// Quality

pytest

Prometheus

Grafana

Sentry

structlog

Project Files

File #001 // MicroserviceDEPLOYED

Event-driven task platform — Django + FastAPI + RabbitMQ

DjangoDRFFastAPIRabbitMQChannelsNginx

▸2 microservices via RabbitMQ topic exchange

▸Real-time WebSocket (Django Channels + Redis)

▸JWT, role-based perms, Nginx reverse proxy

File #002 // SaaSDEPLOYED

WebHook Manager

Reliable webhook delivery with circuit breaker

FastAPICeleryRedisPrometheusSentry

▸Exponential backoff (10s→1h), HMAC verification

▸Redis circuit breaker — zero event loss

▸Clean Arch, >80% coverage, auto-deploy

File #003 // Real-timeDEPLOYED

WebSocket chat — horizontal scaling via Redis Pub/Sub

FastAPIWebSocketRedis Pub/SubJWT

▸Fan-out across N replicas via Redis channels

▸Rooms, typing indicators, history on connect

▸Fully async (asyncpg + redis.asyncio)

File #004 // REST APIDEPLOYED

REST API for book search with monitoring & CI/CD

FastAPIPostgreSQLPrometheusGrafana

▸10 endpoints, JWT, Google Books integration

▸Prometheus + Grafana: error rate, p95, RPS

▸CI/CD: ruff → pytest 87% → Docker → deploy

File #005 // CommercialDELIVERED

Telegram bot — 3 AI-powered book search modes

aiogramGoogle APIsGemini AIVision OCR

▸Search by title, cover photo, or quote

▸Full cycle: spec → deploy → docs

▸Accepted without revisions

File #006 // CommercialDELIVERED

Fitness bot — workout selection & retention mechanics

aiogramAPSchedulerpytest

▸Algorithm: 5-parameter workout selection

▸Streaks, achievements, TZ-aware reminders

▸Full docs, production handoff

Architecture Log

TaskFlow

Django for ORM-heavy domain logic + FastAPI for async notification consumer — each framework where it's strongest. RabbitMQ topic exchange decouples writes from delivery.

WebHook Manager

Celery + Redis broker for fire-and-forget delivery. Circuit breaker prevents hammering dead endpoints. HMAC + idempotency at infra layer, not business logic.

RealTimeChat

Redis Pub/Sub over in-memory — scaling to N replicas is transparent. WS auth via query param because browsers don't support custom headers on handshake.

BookFinder API

Async SQLAlchemy 2 + asyncpg — bottleneck is I/O. Prometheus from day one — errors visible in dashboard before the first bug report.