Fast, scalable systems without technical debt

Michał Mleczko Senior Architect & Developer

I combine business-first thinking with uncompromising infrastructure automation. I take projects from raw idea and analysis, through DDD/Hexagonal architecture optimization, to stress-free production deployments on Kubernetes clusters.

12+
Years Experience
100%
Automated CI/CD
3+
Deployment Continents
Friday
Ready Deploys
Who am I?

Architect who views code through the lens of business value.

As a DISC Dominant (D) profile, my natural drive is to remove obstacles and automate everything repeatable: from code quality checks (Rector, PHPStan), through automated tests, to dynamic test environments and deployments.

However, the true secret of stable business lies in atmosphere and peace of mind. I deeply believe that a confident and cohesive development team can safely deploy code to production even on Friday afternoons without stress. This is guaranteed by hard quality rules and technical maturity.

"A cohesive team that feels safe doesn't hesitate to deploy fixes on Friday afternoons because they trust automation procedures."

My DISC Profile in Action

Click on profile letters to read how each aspect affects my work.

D — DOMINANCE (Dominant) 85%
C — COMPLIANCE (Conscientious) 90%
I — INFLUENCE (Influential) 75%
S — STEADINESS (Steady) 70%
D - Dominance (Results and Action)

Drives me toward continuous process improvement. I don't accept developers wasting time on manual repetitive operations. When performance issues arise, I seek solutions at the source by designing optimal tools.

Real-time Simulator

Stress-Free Friday 4 PM Deployment

See how the automation I've implemented allows developers and business to sleep peacefully. Click the button to run the full QA and CI/CD process.

SLA Metrics
Test Coverage: 94.8%
Static Analysis (PHPStan): Max (Lvl 9)
Avg Deployment Time: 3 min 45 sec
mleczakm-ci-cd-runner.sh
v1.4.2
> Waiting for deployment to start...
> Click "Run Pipeline" to test stress-free deployment.
IDLE
0%
Career Path

Delivered Projects & Roles

From modernizing massive monoliths, through distributed architectures across continents, to full cloud orchestration.

e

Senior Engineer, Architect Contract

eMag (Warszawa, Polska)

03.2024 - 05.2025
  • PHP Monolith Refactoring: Implemented PHPStan (level 9), RectorPHP, and PHPUnit. Zero regressions on changes.
  • Kubernetes & CI/CD: Optimized deployment pipelines for containerized applications.
  • Mentoring: Implemented error logging and reporting standards in PHP teams.
G

Senior Software Engineer

GFG Group (Niemcy / Globalnie)

02.2023 - 02.2024
  • Backend e-commerce: Distributed across 3 continents, Kubernetes, PHP 8, MySQL.
  • MySQL Migration: Safe transition from v5 to v8 in production.
  • Implemented static code analysis for quality improvement.
C

Senior Software Engineer

Cobiro (Warszawa, Polska)

03.2022 - 03.2023
  • Microservices: Development and maintenance of distributed cloud architecture.
  • IaC & CI/CD: Terraform, Atlantis, CircleCI, GitHub Actions.
I

Senior PHP Developer & Leader

IIIT (Kraków, Polska)

07.2018 - 06.2021
  • Architecture: Implemented Hexagonal Architecture, CQRS, Event Sourcing.
  • A/B Testing: Swoole, RoadRunner, Kafka - zero latency on redirects.
  • Monitoring: Prometheus, Grafana, ELK stack.
3

Software Developer

Grupa 3S (Katowice, Polska)

02.2015 - 09.2016
  • CRM rewrite: Symfony 2/3, 2700+ business clients.
  • Design and implementation of internal modules.
Tools & Technologies

My Tech Ecosystem

Complete range of tools enabling rapid design, testing, and stable hosting of business systems.

PHP 8.x
Symfony Framework
Laravel
Swoole / Roadrunner
Docker / Containers
Kubernetes / Helm
Terraform & IaC
GitHub Actions / CircleCI
Hexagonal Architecture
Domain-Driven Design
Redis / Memcached
Kafka / CQRS
Python Scripts
Prometheus & Grafana
React SPA
MySQL & Postgres
What I'm Proud Of

Breakthrough Achievements

Specific deployments that brought measurable financial savings and simplified business processes.

Performance & Architecture

High-Scale A/B Testing System

As Tech Lead, I led a team to create a modern A/B testing system for a high-traffic platform. Fast user redirects, precise activity tracking, and advanced reporting were built on Kafka, RoadRunner, Swoole, React and containers in a Kubernetes cluster.

Swoole Kafka React Docker
DevOps & Automation

On-Demand Test Environments

I designed and deployed from scratch a complete, automated CI/CD pipeline enabling automatic creation of temporary, independent development environments for each development branch. I used Docker, Traefik, Rancher and dynamic runners. This reduced QA time by over 40%.

Rancher Traefik CI/CD
Open Source

Flow PHP (ETL) Support

I actively support and develop the open-source ecosystem, including the popular Flow PHP framework — focused on high-throughput ETL processing in PHP. Maintaining excellent code quality standards, I implement static analysis tools and QA tests for smaller companion tools.

Flow PHP ETL QA Automation
CSR & Social Engagement

3 Years of Volunteering at Orphanage

During high school, I weekly visited a local orphanage where I voluntarily managed the computer lab. My responsibilities included software selection, physical computer hardware repair, securing and cleaning systems from virus infections, and basic training for staff and residents.

Hardware SysAdmin Social Work
Contact

Let's Build Something Great Together

Have a project to rescue? Need to organize infrastructure, implement static tests, or scale a cloud application? Let's discuss specific business needs.

Radzymin (Warszawa), Polska