k1y0mi/dev GitHub ↗
Available for work

~ $

Backend engineer who ships production systems — solo.

I’m Maxim Chumakov — k1y0mi. In ~1 year of commercial work I designed and shipped four multi-tenant production platforms solo — from DB schema and API to deploy and load testing. Async stack (FastAPI, async SQLAlchemy, aiogram 3), LLM integration, ~30 Linux servers under management. Plus a real LLM-efficiency tooling track on the side.

Get in touch Download CV ↓ See the work ↓
~1 yr commercial backend
4 production platforms, solo
10+ projects on GitHub
about — 01

What I do

I’m a backend engineer — Python at the core: Django 5, DRF, FastAPI, async SQLAlchemy, PostgreSQL, Redis. I design multi-tenant systems and own them from DB schema to deploy and load testing. Around that, a real LLM-efficiency tooling track, plus ML and systems work.

Backend engineering

My core: Python — Django 5, DRF, FastAPI. Multi-tenant data models, REST APIs, auth and RBAC, an async stack, deploy and k6 load testing — features owned from DB schema to production.

class Platform(models.Model):
    tenants = "isolated"
    stack   = "async"
    shipped = True  # solo

AI / ML

Classifiers and detectors — fine-tuned transformers and classic ML, calibrated and honestly evaluated on hard test splits.

LLM tooling

Formats, skills and MCP servers that cut token cost for agents — lossless, round-trippable, measured with tiktoken.

Systems & security

Lower-level work too: a terminal web browser, CLI tools, an encrypted messenger, intrusion detection and BadUSB tooling.

experience — 02

Where I’ve shipped

Commercial backend work — production systems with real users, owned end to end.

Backend / Full-Stack Developer (contract) Nik-A Tech (ex-iQnix Tech), remote · May 2025 — present

Sole or lead developer of four production platforms plus the company CMS and site. Took over the entire codebase from a departed developer. Introduced Git (the code was edited directly on prod before) and k6 load testing as a pre-release practice. Administer ~30 Linux servers across client deployments — provisioning, deploy, DNS/SMTP.

  • Django 5
  • DRF
  • FastAPI
  • aiogram 3
  • async SQLAlchemy
  • PostgreSQL
  • Redis
  • Docker
  • nginx
  • gunicorn
proof — 03

Selected work

Four production platforms first — commercial, built solo. Then open-source and side projects, filterable by domain — everything there links to source. Full list on GitHub →

Productioncommercial · closed source
ProductionDjango · PostgreSQL · Redis COP-UPK — multi-tenant SaaS Designed and built solo in ~2.5 months before the admissions season. 200+ routes, now used by 4 universities/colleges, 20–30 staff users, 500+ applications per campaign. RBAC across 5 roles, multi-step forms with conditional logic, isolated per-tenant deploy. DOCX generation engine: each org uploads its own templates and maps placeholders via a settings UI — no developer in the loop. Online-exam module: Judge0 code sandbox + LLM-as-judge grading on self-hosted models.
ProductionDjango · PostgreSQL · distributed MyDNS — distributed DNS-propagation service Master-master replication across 4 geo-nodes with no message broker: signal-based event log, UUID idempotency, last-write-wins conflict resolution, cursor-based sync, HMAC node authentication. Parallel resolving through 25 global resolvers with a d3-geo world map.
ProductionFastAPI · integration MAX — messenger integration gateway Single integration point with the MAX messenger for all company projects. Self-service onboarding: bot creation, API endpoint issuance with instructions; routing, delivery and centralized message tracking. Multi-tenant: SHA-256 client-key hashing, HMAC-signed callbacks, retry-delivery queue.
ProductionDjango · perf COP-SAO — online exam platform A standalone exam and test platform — a lighter spin-off of the COP-UPK online-exam module, focused only on running exams and tests. Custom django_perf profiling package; solved migration edge cases (NULL-distinct in PostgreSQL) and multi-worker gunicorn state desync.
Open-source / side projectssource + live demos
LLM toolingJavaScript · Python token-diet live playground See what your JSON costs in tokens and dollars across models — then put it on a diet. A live playground backed by a reproducible benchmark (JTF cuts ~40% losslessly). Try the playground Source ↗
AI/MLPython · PyTorch ru-ai-text-detector live demo Detects whether Russian text is human-written or LLM-generated. Statistical features (v1) plus fine-tuned ruBert transformers (v2–v4), calibrated to FPR ≤ 3%. Service / CLI / TUI, fully local. Try the live demo Model on HF ↗ Source ↗
SystemsRust glyph A web browser that runs in your terminal. Fetches over HTTP(S), parses HTML with html5ever, applies a subset of CSS, lays it out as text. Tabs, forms, session restore — no JS engine, intentionally fast. → LLM toolingspec · Python · JS jtf JTF — a lossless, compact JSON encoding for LLMs (−33% tokens, round-trippable). Formal spec + Python & JS reference libs + cross-language conformance. → LLM toolingJavaScript glyph-mcp MCP server giving Claude web search & fetch as plain text, rendered through glyph. Roughly 8× fewer tokens per lookup. → LLM toolingPython json-token-skill Claude Code skill + PostToolUse hook: reads JSON as compact JTF automatically, saving tokens. Ships a Cursor rule too. → AI/MLPython ids-nsl-kdd Network intrusion detection on the NSL-KDD benchmark. RandomForest / GradientBoosting / LogReg, binary & multiclass, honest metrics on a hard test split. → SecurityPython GhostVault Open-source anonymous messenger: encrypted chat, shared database access, desktop GUI. Built around user control over data. → SecurityShell · DuckyScript FlipperZero-BadUSB BadUSB scripts for Flipper Zero — utilities and demos for security testing and automation. For legal, ethical use only. → ToolsPython Fake-data-gen Synthetic / test-data generator built on Faker, with a multilingual UI and a stylish CLI banner. →
toolbox — 04

Languages & stack

Python — Django, DRF, FastAPI, async90%
Bash — scripting, server admin65%

Backend core

  • Django 5
  • DRF
  • FastAPI
  • aiogram 3
  • async SQLAlchemy
  • PostgreSQL
  • Redis
  • Docker
  • nginx
  • gunicorn

Load testing

  • k6
  • smoke / ramp / stress
  • soak / spike
  • xk6-sql

LLM tooling

  • Claude API
  • self-hosted (Ollama / OpenWebUI)
  • MCP
  • tiktoken
  • LLM-as-judge

AI / ML

  • PyTorch
  • transformers
  • scikit-learn
  • fine-tuned ruBERT

Also

  • JavaScript
  • C++
  • Rust
  • Bash
  • Git
  • Linux
contact — 05

Let’s talk.

Open to backend roles (middle, Python), and to interesting collaborations. The fastest way to reach me is email or Telegram.

Telegram @k1y0mi GitHub @k1y0miiii Hugging Face @k1y0mi
download résumé
EN global / relocation PDF ↓ DOCX
RU Russian market PDF ↓ DOCX
copied to clipboard