_{🇷🇺 Резюме на русском: career.habr.com/mtizima}

Backend engineer and engineering leader with 17+ years of experience, the last 5 as Tech Lead / Engineering Manager for FemTech and FinTech products serving 200K-500K+ active users. I design event-driven, horizontally scalable systems, build engineering teams from zero, and ship infrastructure that stays fast under real production load.

• 🏗️ Architecture: event-driven microservices, hexagonal architecture, zero-downtime Kubernetes migrations, monoliths when that's the correct call
• 👥 Leadership: hired and mentored teams up to 12 engineers across 4 time zones, grew 4 Middle engineers to Senior on my last team
• ⚡ Impact: cut API latency 200ms → 120ms, doubled delivery velocity, sped up release cadence 30%, shipped real-time analytics for 200K+ users
• 🤖 AI-native engineering: spec-driven development with Claude Code, production LangChain/LangGraph agent workflows

Founder & Fullstack Engineer · 2026-present · task24.online

A production SaaS built on one idea: one Telegram supergroup = one team, one topic = one task. Tasks are created by voice message, transcribed, reformatted, and titled through an LLM pipeline, with automatic topic creation, a closed-task archive, weekly AI-generated performance summaries, and recurring billing via Telegram Stars, bank cards, and SBP.

• Event-driven architecture: the API publishes to NATS JetStream; isolated FastStream workers run the full voice-to-task pipeline
• Analytics subsystem built on atomic incremental SQL instead of ORM read-modify-write, with materialized views and a log-based fallback recompute
• Application-level envelope encryption (AES-256-GCM) for user content, applied transparently via a SQLAlchemy TypeDecorator
• Recurring Telegram Stars billing and a rate-limited broadcast pipeline built around Bot API limits
• Built iteratively with Claude Code as a pair-engineering partner: spec first, reviewed, then shipped

Python 3.12 FastAPI aiogram 3 FastStream NATS JetStream PostgreSQL 16 SQLAlchemy 2.0 Redis Docker OpenAI Whisper

_{Private repository. Architecture walkthrough available on request.}

Backend Engineer (independent) · Telegram-based POS for food service

An order-lifecycle system for a food business: cashiers place orders from Telegram, kitchen staff get real-time notifications, and the product catalog imports from CSV. Built end-to-end with Claude Code, from spec and implementation plan through production deploy and bug fixes.

• Order lifecycle service (create → ready → issued) with per-recipient notification isolation, so one unreachable chat never blocks the rest of the kitchen
• SQLAlchemy models for products and orders, CSV catalog ingestion with validation
• Deployed on Render with managed Postgres

Python aiogram SQLAlchemy PostgreSQL Render

_{Private repository. Architecture walkthrough available on request.}

Tech Lead · Python, Flutter, FastAPI · 200K+ active users

• Led a zero-downtime migration to Kubernetes, raising platform availability from 60% to 80%
• Migrated Sanic → FastAPI, cutting p50 response time 200ms → 120ms while doubling delivery speed
• Integrated PowerBI + Grafana for real-time analytics across 200K+ active users
• Restructured code review and CI/CD, increasing release velocity by 30%

Head of Python Development → Tech Lead · scaled to 500K+ users

• Designed a scalable architecture for medical data processing on Django + FastAPI, lifting throughput 50%
• Built a backend team from scratch: hired, onboarded, and mentored engineers to Senior level
• Promoted to Tech Lead for an international 12-person team (mobile, QA, DevOps, backend) across 4 time zones
• Rebuilt the backend on Django + Redis microservices, tripling throughput

Head of Python Development · 2021 · litres.ru

• Led the migration from a legacy Perl monolith to a Python microservices architecture
• Introduced hexagonal architecture to decouple domain logic from delivery and infrastructure concerns
• Built integration services for 15+ partners
• Sped up catalog search 50% across a 1M+ book catalog using Elasticsearch

Python FastAPI MySQL ClickHouse Kafka Elasticsearch Kubernetes

Senior Python Developer · 2018-2021 · anna.money

• Led a team of 5 building antifraud and AML (anti-money-laundering) services for live transaction flows
• Coordinated integrations with external providers including Global Processing Services and Dow Jones
• Owned technical design end-to-end on asyncio/aiohttp, Kubernetes/Mesos, and RabbitMQ messaging

Python asyncio aiohttp PostgreSQL Kubernetes RabbitMQ MongoDB

adjust-client: Python client for the Adjust.com server-to-server (S2S) event API.

Open to Tech Lead / Staff Engineer roles, remote-first, worldwide.