Building backends that handle 10M+ requests a day — and helping engineers grow into Senior roles.

Ten years of backend engineering: event-driven platforms, production reliability, and mentoring engineers on the way up.

Role: Senior Backend Engineer · Systems Design · Mentor
Focus: Distributed systems, event-driven platforms, backend reliability
Experience: 10+ years in production
Stack: Scala · Go · Kubernetes · Kafka · PostgreSQL
Scale: 10M+ requests/day · 20+ engineers mentored across mid and senior levels
Location: London, UK

About

Stan Sobolev is a Senior Backend Engineer based in London, focused on distributed systems that handle millions of requests a day. Over the past ten years he has designed event-driven architectures, led technical work across production backends, and mentored 20+ engineers through the mid and senior stages of their careers.

Selected Work

01 · Infrastructure
Distributed Systems
Multi-region event-driven architectures handling millions of daily transactions with sub-50ms p99 latency at steady state.
02 · Mentorship
Engineering Mentorship
Structured mentorship for engineers moving from mid into senior roles — pairing technical coaching with career navigation.
03 · Platform
Platform Architecture
Consolidated fragmented services into coherent internal platforms, reducing time-to-production from weeks to days.

Open Source

Doradura

Rust

Media-download ecosystem: terminal UI + Telegram bot on a shared Rust core. Downloads from 1000+ platforms (YouTube, TikTok, Spotify, SoundCloud). Audio effects, video-to-notes, 4 languages.

Tokio · teloxide · ratatui · FFmpeg · yt-dlp · Axum · SQLite

Telepath

Python TypeScript

Single-tenant Telegram reader and automation tool. Web dashboard for reading channels and automating messaging pipelines. JWT auth, background job scheduler, local session management.

FastAPI · Next.js · SQLite · Docker Compose · pytest

The Hand

TypeScript

Browser multiplayer poker engine. 7 variants (Hold'em, Omaha, Short Deck, Pineapple, Joker). P2P via WebRTC + server matchmaker. Ed25519 signed protocol. 4-tier bot AI. 300+ tests.

Vite · PeerJS · WebSocket · @noble/ed25519 · Node.js · SQLite

Interactive Cheatsheets

Algorithms & Data Structures

Search Algorithms Dynamic Programming Data Structures Trees B-Tree Graph Algorithms HashMap Internals LRU Cache

Systems Design

Kafka Raft Consensus Consistent Hashing Database Internals Transaction Log Networking Memory Management Retry & Backoff

Go Internals

Channels & Goroutines Concurrency Primitives Interfaces Map Internals

Reference

English Grammar