Hi, I'm Maciej Marzęta
Software Engineer
Building Scalable Backend Solutions to Solve Your Most Complex Problems.
from fastapi import FastAPI
from expertise import Backend
app = FastAPI()
engineer = Backend(
name="Maciej Marzęta",
role="Team Leader",
passion="Scalable APIs"
)
@app.get("/")
async def solve_problems():
return engineer.deliver("excellence")A glimpse about me
I'm a Backend Team Leader at a leading unicorn tech company and a Python expert. With years of experience in building high-performance, scalable systems, I've helped teams deliver exceptional software that handles millions of requests.
I also run M3L Software — a smart software agency helping businesses build robust, scalable solutions. From MVPs to enterprise systems, we deliver excellence.
My journey in software engineering has taken me from writing my first Python script to leading engineering teams and speaking at international conferences like PyCon Italy.
When I'm not coding, you'll find me exploring new technologies, contributing to open-source projects, or writing about backend development on my blog.
Agency Founder
Running M3L Software — smart solutions for businesses
Python Expert
Deep expertise in Python ecosystem and best practices
Performance Focused
Building systems that scale to handle any load
Conference Speaker
Sharing knowledge at international conferences
What I can do for you
Whether you're a startup looking for end-to-end backend solutions or an enterprise in need of specialized services, I've got you covered.
Custom Backend Solutions
Tailor-made backend systems designed to meet your unique business needs and scale with your growth.
API Development
Robust, scalable APIs and seamless third-party integrations that power your applications.
CI/CD Setup
Streamlined development workflows via automation for faster and safer deployments.
Performance Optimization
Enhanced application speed and resource efficiency for better user experience.
Codebase Audits
Comprehensive code reviews and refactoring to improve quality and maintainability.
Team Training
Custom training programs and mentorship in Python and backend best practices.
Tools of the trade
My expertise lies in crafting efficient, scalable backend solutions with these technologies.
Backend Technologies
Python
Primary language for flexibility and robust libraries
FastAPI
High-performance APIs with modern Python type hints
Django
Comprehensive framework for rapid development
FastStream
Event-driven microservices with Kafka, RabbitMQ, NATS
Go
Concurrent, high-performance system programming
Data Management
PostgreSQL
Advanced relational database for complex queries
MongoDB
Flexible NoSQL for document-based storage
AWS Aurora
Multi-region, globally distributed database clusters
Redis
In-memory caching and real-time data structures
DevOps & Cloud
Docker & K8s
Container orchestration at scale
Terraform
Infrastructure as Code for cloud automation
CI/CD
GitHub Actions, GitLab CI, ArgoCD pipelines
Observability
Prometheus, Grafana, OpenTelemetry tracing
Sharing knowledge at PyCon
From my blog
My cloud, at Home
Building a personal cloud infrastructure at home for privacy and control.
Read more →Degoogle Yourself Before It's Too Late
Taking control of your digital life and reducing dependency on big tech.
Read more →FastAPI - Hitting the Performance Jackpot
Part 1: Asynchronicity and how to leverage it for maximum performance.
Read more →Python mutable default arguments
Why the snake bites? Understanding this common Python gotcha.
Read more →Demystifying Async Python
Practical examples with async and await for concurrent programming.
Read more →Maximizing Reliability in FastAPI
Global exception handling patterns for robust applications.
Read more →Let's build something great together
I'm open to all types of projects and always looking for new challenges. Whether you need backend development, consultation, or team training - let's discuss your project's specific needs.
$ echo $AVAILABILITY
Open for new projects ✓
$ cat expertise.txt
Python | FastAPI | Django
APIs | Performance | DevOps
$ ./send_message.py