2PC vs saga diagram
When Monoliths Break
One “Buy Now” spans payments, orders and inventory. Why ACID stops at the service boundary, and what replaces it.
2PC · choreography vs orchestration sagas
- Microservices
- Saga
- 2PC
ISSUE #1 · THE ORIGIN STORY
The engineer who keeps the cluster standing at 3 a.m.
mn2rb — Python backend engineer, distributed systems. I build microservices, event-driven pipelines and the Kubernetes and Prometheus setups that tell you why they broke.
hover to tilt · drag to move · double-click to resetswipe sideways to move · double-tap to reset
FUEL SUPPLY
tap a can to crack it
tap a can to crack it
0/3 opened
My Arsenal
tools I reach for in productionLanguages
LANG- Python
- Go
Python for services, Go when it has to sit close to the kernel.
Backend
API- Django
- DRF
- FastAPI
- REST
- gRPC
Service contracts first, then the code behind them.
Data
DATA- PostgreSQL
- Redis
- SQLite
- immudb
Schemas, caching and audit logs that can’t be rewritten.
Messaging
ASYNC- Kafka
- RabbitMQ
- Celery
- MQTT
Event-driven, so services stop waiting on each other.
Platform
INFRA- Docker
- Kubernetes
- AWS
- DigitalOcean
- Nginx
- Linux
CI/CD pipelines and lean images, from Compose to Kubernetes.
Ops & Security
O11Y- Prometheus
- Prometheus Operator
- JWT
- OAuth2
- RBAC
- Rate limiting
If it isn’t monitored, it isn’t in production.
Engineering Issues
write-ups · collect them allmigration history
The Schema Time Machine
Introducing django-schema-history: every AddField, RemoveField and AlterField recorded and reviewable in the admin.
pip install django-schema-history
- Django
- Migrations
- PyPI
query waterfall
The N+1 Menace
One query for the list, N more for the relations. How the N+1 problem sneaks into Django and how to stop it.
select_related · prefetch_related
- Django
- ORM
- Performance
The Journey
experience & education- Mar 2026 — now
Backend Engineer
VeloRefactor legacy services, ship new APIs, run CI/CD and keep Kubernetes and its monitoring healthy.
☕ fuel: DEPLOY+ - Mar 2025 — Feb 2026
Microservices & Platform Engineer
Abber · remoteArchitected and operated a 13-service platform on AWS with gRPC, SAGA and event-driven messaging.
☕ fuel: double espresso - 2024 — 2025
Freelance System & Backend Engineer
Stockkedy · remoteBuilt an RFID stock management system tracking 10K+ products across warehouses.
☕ fuel: DEBUG ENERGY - 2023 — now
Master in Computer Science
Higher School of Computer Science, Sidi Bel AbbèsComputer science studies alongside backend work.
☕ fuel: CAFFEINE++
The Laboratory
grimoire · open source · experimentsdjango-schema-history
A Django package that tracks model and schema changes. Published on PyPI, with 1,000+ downloads.
SSH-Honeypot
A high-interaction SSH honeypot that simulates a real Ubuntu server to capture and log attacker behaviour.
Streamix
A lightweight Redis Streams event messenger with consumer groups, retries and a dead-letter queue (streamix-queue on PyPI).
zp
A lightweight CLI that monitors open ports, processes and sockets straight from kernel space.
Spotter
A REST API that finds the cheapest fuel stops for a truck crossing the US, using OSRM routes and dynamic programming.
lab@mn2rb:~$ sudo zp --watch
:8000 LISTEN uvicorn pid=4121
:9092 LISTEN kafka pid=2210
:6379 LISTEN redis pid=1873
:1883 CLOSED mosquitto ⚡
$
EXPERIMENT · service heartbeatLIVE
Five services behind circuit breakers. One is tripped on purpose.
#6 · The Next Chapter
To be continued… with your team?
Open to backend and platform roles. Happy to talk microservices and event-driven design over coffee.