OPEN FOR SENIOR ROLES & CONTRACTS

High-Throughput Backends & Autonomous Automation Systems

Senior Software & Systems Automation Engineer

Specialized in engineering fault-tolerant asynchronous distributed backends, resilient browser automation engines, and high-velocity analytical pipelines with sub-second response times. 6+ years shipping production infrastructure with zero-downtime reliability.

Inspect Production Projects Download Resume (PDF) Telegram (@js122b)
99.98%
Automation Uptime
450+ msg/s
Peak Asynchronous Throughput
<40ms
p95 Message Latency
10x Speedup
DuckDB In-Memory Analytical Processing

Featured Engineering Architecture

bash — leonard@production-node: ~
// Welcome to Leonard Johnson's Interactive Terminal v3.8. Type 'help' or click tabs above.
leonard@production-node:~$ python3 overview.py
[SYS_INIT] Loading Senior Engineering Profile... Name : Leonard Johnson Title : Senior Software & Systems Automation Engineer Focus : Asynchronous Backends, Bot Orchestration, Stealth Scraping, DuckDB Analytics Contacts : a.t.87.14.912@gmail.com | Telegram: @js122b | GitHub: hiper728 Status : Ready for deployment.
leonard@production-node:~$ help
Available commands: projects - Print production architecture portfolio skills - View categorized technical matrix experience - Show professional timeline contact - Display direct telegram and email links curl resume - Download ATS-compliant resume PDF clear - Clear screen
leonard@production-node:~$
Distributed Messaging • High-Throughput

OmniBot Orchestration Platform

High-concurrency bot platform coordinating 20+ specialized worker nodes across Telegram (aiogram 3.x) and Discord. Features ACID SQLite WAL state machines, dynamic queue backpressure, and zero-drop transactional webhook dispatching.

[Incoming Webhook] ---> [RateLimiter Token Bucket] ---> [Asyncio Worker Pool] | v [Admin Telemetry] <--- [WAL Transaction Engine] <--- [SQLite / Redis State]
450+ msg/s
Peak Throughput
<40ms
p95 Latency
99.98%
Reliability SLA
⚡ Live Asynchronous Event Simulator
Ready. Click 'Dispatch Test Message' to execute live asynchronous dispatcher mock...
Python 3.13 Asyncio aiogram 3.x SQLite WAL Docker Redis
Web Automation • Anti-Detection

Sentinel Stealth Scraper

Headless browser automation system leveraging Chrome DevTools Protocol (CDP) and Playwright. Monitors 50,000+ endpoints daily with structural DOM diffing and cryptographic content hashing.

94%
Block Reduction
50K+
Daily Endpoints
Playwright CDP DOM Diffing Session Cache
Big Data • High Performance

DuckDB In-Process Data Engine

Zero-overhead vectorized analytical processing pipeline running SQL directly over multi-gigabyte CSV, Parquet, and JSON files. Achieves sub-second aggregation times without requiring cumbersome standalone database setup.

📊 In-Process SQL Aggregation Bench
Click 'Run 1.2M Record Query' to benchmark analytical query performance...
DuckDB Parquet SQL Python Zstandard
Python 3.13 Asyncio • Open Source Engine

AsyncFlow — Asynchronous DAG Task Orchestrator

Minimalist, high-velocity directed acyclic graph (DAG) workflow engine. Resolves task dependencies on the fly, prevents cyclic deadlocks, and coordinates parallel asynchronous worker execution with bounded memory usage.

<2ms
DAG Resolution Overhead
Zero-Dep
Pure Python 3.13 Core
MIT
Open Source License
Python 3.13 Asyncio DAG pytest pytest-asyncio MIT License
Linux • Container Orchestration

Infrastructure & CI/CD Autopilot

Production server hardening, multi-stage Docker build pipelines, and automated zero-downtime blue/green deployments. Automated Nginx reverse proxy routing, SSL auto-renewal, and Linux systemd supervision watchdogs.

Zero Downtime
Rolling Deployments
<2 min
CI/CD Build & Deploy
Docker Multi-Stage GitHub Actions Nginx Systemd Ubuntu/Debian

Technical Matrix & Stack

Languages & Runtimes

  • Python 3.13 Asyncio / CPython
  • SQL Postgres / SQLite
  • Bash / Shell Linux Scripts
  • Go CLI / Microservices
  • TypeScript / JS Node.js Runtime

Frameworks & Automation

  • FastAPI REST / OpenAPI
  • aiogram 3.x Telegram Platform
  • discord.py Discord APIs
  • Playwright / CDP Browser Automation
  • SQLAlchemy / Pydantic v2 Type Validation

Databases & Storage

  • PostgreSQL ACID / Indexes
  • DuckDB In-Memory Analytical
  • SQLite (WAL) High Concurrency
  • Redis Pub/Sub & Caching
  • Alembic Schema Migrations

DevOps & Infrastructure

  • Linux OS Debian / Ubuntu / Arch
  • Docker & Compose Multi-Stage Builds
  • Nginx / Caddy Reverse Proxy & SSL
  • GitHub Actions CI/CD Pipelines
  • Systemd Watchdogs Service Supervision

Career Experience

Lead Systems & Automation Engineer

2022 – Present
Distributed Systems, Automation Platforms & Infrastructure
  • Architected and deployed an asynchronous messaging engine coordinating 20+ specialized worker nodes, handling 450+ msg/sec peak throughput with sub-40ms latency and 99.98% reliability.
  • Engineered a resilient headless browser scraping engine using Playwright and CDP, monitoring 50,000+ endpoints daily while reducing anti-bot blocks by 94% through session persistence.
  • Built in-process analytical data pipelines using DuckDB and Polars, accelerating batch report query processing 10x over relational databases.
  • Standardized containerized production microservices with optimized multi-stage Dockerfiles and established automated GitHub Actions CI/CD deployment to Linux servers behind Nginx.

Senior Backend Engineer

2019 – 2022
High-Scale APIs, Automation & Database Optimization
  • Built robust REST API services and asynchronous background workers using FastAPI, Pydantic, and PostgreSQL serving over 1M monthly requests.
  • Implemented automated database backup, migration (Alembic), and point-in-time recovery workflows across distributed SQLite and PostgreSQL databases.
  • Spearheaded automated testing strategies with pytest achieving 92% test coverage across core messaging and transaction services.

Get in Touch

Direct communications for engineering inquiries, senior software opportunities, and contract collaborations.

✈️ Telegram: @js122b ✉️ Email: a.t.87.14.912@gmail.com 🐙 GitHub: github.com/hiper728

Download Official Resumes

Verified ATS-compliant resumes formatted for corporate and technical recruiting pipelines.

📄 Silicon Valley ATS Resume (PDF)
Standard single-column format, high parseability rate (Greenhouse/Lever)
Download
📝 Microsoft Word Resume (.docx)
Editable clean document typography (Calibri/Arial standard)
Download