Available for work · open to relocation

Iakov Zubekhin/Backend & AI/LLM Engineer & Fullstack

From an idea to a live product.

Backend and AI/LLM are my core strengths. I build iOS and Android apps, backends, CRM dashboards and websites — from architecture to launch and app store publication.

Brasília, Brazil · open to relocation & remote
Photo of Iakov Zubekhin
01

How I can help

I own the full development cycle: from the idea and architecture to launch and ongoing support.

Typical projects: LLM assistants and RAG search, real-time chat and streaming, payment and POS integrations, and SIP telephony. I work in Python with Django, DRF and FastAPI, and I care about reliability, performance and clean systems that survive production — not demos.

Over 4 years, I shipped 18+ production products in food delivery, retail, edtech, smart buildings and real estate. Backend is my core, and I take on the full stack: React/Next.js for websites and CRM dashboards; Flutter, Kotlin Multiplatform, Kotlin and Swift for mobile apps; deployment, support and app store releases.

Education

MSc, Aerospace Engineering — Moscow Aviation Institute

B2B / Contract

Available for contract work through my registered company — Iakov Zubekhin LTDA · CNPJ 66.795.280/0001-80

4+
Years shipping to production
18+
Products shipped
02

Selected work

A few of the harder problems I've shipped.

Problem

Connect personal reading and prayer with church community life: discussions, shared events and participation in sermons. The product needed mobile clients, a shared backend and a web dashboard for administrators.

Approach

Independently designed and built Kotlin Multiplatform and Compose Multiplatform iOS/Android clients, a Ktor/PostgreSQL backend, website and management dashboard. Implemented WebSocket interactions, community membership and role checks, SQLDelight local storage and server synchronization.

Impact

Personally took my own product from idea to App Store and Google Play publication and Docker deployment of the backend. Delivered one platform for community members and administrators: mobile apps, social features, web dashboard and website.

Key features and engineering

Community social network

Discussions with nested replies, reactions, testimonies and prayer requests. WebSocket updates, typing indicators and read receipts support live conversations.

Interactive sermons and polls

Administrators control the current sermon block while participants receive live updates. Revision checks reject stale edits; polls support anonymity, one vote per person and automatic closing.

Events and push notifications

Community calendar, RSVPs, QR attendance check-in and ICS calendar export. Push notifications and links to the relevant content.

Offline use and synchronization

Read and search downloaded texts without a connection. SQLDelight stores personal data locally; note and prayer journal changes sync to the server after reconnecting.

Web dashboard and access control

Manage community members, content and events. Administrator/member roles, membership and plan checks, and SSO from the app into the web dashboard.

Subscriptions and payments

Community plans and donations through Stripe. Webhook handling, subscription status updates and plan-based feature access.

Kotlin MultiplatformCompose MultiplatformKtorPostgreSQLSQLDelightDocker
03

Stack

The tools I use, grouped by what they do.

Backend

  • Python
  • Django
  • DRF
  • FastAPI
  • Ktor
  • Celery
  • Django Channels
  • pytest

Data & Search

  • PostgreSQL
  • PostGIS
  • pgvector
  • Redis
  • SQLAlchemy
  • S3 / MinIO

AI / LLM

  • RAG
  • Vector search
  • Embeddings
  • LLM orchestration
  • Tool calling
  • Streaming

Real-time & Telephony

  • WebSockets
  • Daphne / ASGI
  • Asterisk
  • PJSIP
  • SIP
  • HLS

Payments & Integrations

  • Stripe
  • Telegram Bots
  • iiko
  • Apple Pay
  • Twilio
  • Push (FCM/APNs)
  • +14 more

DevOps & Infra

  • Docker
  • Docker Compose
  • GitLab CI/CD
  • nginx
  • Sentry
  • Ubuntu

Mobile

  • Flutter
  • Dart / BLoC
  • Kotlin Multiplatform
  • Compose Multiplatform
  • SQLDelight
  • Kotlin
  • Swift / RxSwift
  • Firebase

Frontend

  • React
  • Next.js
  • TypeScript
  • Tailwind CSS
  • HTML / CSS / JS
04

Experience

Backend / Fullstack Engineer

SMD Agency
CurrentOct 2023 — Present
Remote · Moscow
  • Backend for production iOS/Android/Web apps on Django/DRF and FastAPI.
  • Shipped an AI assistant (MCP tool-agent, hybrid catalog retrieval, streaming), real-time chat/notifications and background pipelines.
  • Integrated payments (Stripe, Square), POS/CRM (iiko, amoCRM) and telephony; ran CI/CD and production support.
  • Worked on the frontend (Flutter, Swift, Kotlin, JS) where it talks to the backend.

Backend / Fullstack Engineer

Svetorezerv

Sep 2022 — Dec 2023
Moscow
  • Built an AI video-streaming platform and a smart procurement-automation system (Django/Channels, Celery).
  • Signed HLS playback, Stripe billing, S3/MinIO media and an automated multilingual dubbing pipeline.
  • Procurement automation: supplier discovery, RFQ generation, response classification and AI-assisted proposal comparison.
05

Let's work together

Tell me what you're building, and I'll tell you how I'd ship it. Open to full-time and contract work, relocation and remote.

B2B / Contract cooperation

Iakov Zubekhin LTDA · CNPJ 66.795.280/0001-80

Languages
  • Russian — Native
  • English — Intermediate
  • Portuguese — Intermediate