Fullstack Engineering

System design for well-rounded engineers

[Fullstack Engineering @FullstackZip]

A little copying is better than a little dependency.
— Go Proverb

[Anton Manaev @ManaevLab]

@FullstackZip @fireship_dev System design case studies are the best learning format. Reading architecture docs is one thing but seeing the actual feature breakdown and tradeoffs is where the real lessons live. Subbed.

[Fullstack Engineering @FullstackZip]

We're on YouTube!

The channel: https://t.co/wZgiqlX7Gn

The format: system design case studies.

Architecture -> feature breakdown -> takeaways

If @fireship_dev is espresso, this is pour-over.

[Fullstack Engineering @FullstackZip]

What powers the world's largest independent DevOps platform?

A Ruby on Rails monolith.

Yes, really.

Here's how it comes together. https://t.co/ifkBpfYVgd

[Fullstack Engineering @FullstackZip]

GitLab is a modular monolith.

Here's the stack:

Backend: Ruby
HTTP: Puma
Edge: Nginx
Proxy: Go
Jobs: Sidekiq
DB: Postgres
Cache: Redis
Git: gRPC
Blob: S3
UI: Haml, Vue, Piana, Immer
Observability: Prometheus, Sentry
Deployments: Omnibus

#systemdesign
#softwarearchitecture

[Fullstack Engineering @FullstackZip]

3 levels of system design thinking

1) Facts. The difference between SQL and NoSQL.

2) Heuristics. SQL for structured data, NoSQL for unstructured data.

3) Inventions. Distributed SQL.

[Fullstack Engineering @FullstackZip]

A simple measure of complexity: Lines of code per prod dependency

[Fullstack Engineering @FullstackZip]

Problem: Race conditions
Solution: Ban direct state access

If you want something from another node, you send a message to its mailbox.

Nodes process messages one at a time, update their own state, and send messages back out.

That's it.

Tradeoffs?
(Looking at you, DDD fans)

[Fullstack Engineering @FullstackZip]

Which blog would you rather maintain?
#systemdesign

[Fullstack Engineering @FullstackZip]

Discord's Architecture:
- Foundation: Actor Model
- Real-time: Elixir + WebSockets
- API: Python + Rust Data Service
- DB: ScyllaDB
- Search: Elasticsearch
- Infra: GCP
- Voice: WebRTC + Opus codec
- Client: React, RN, Electron

Full breakdown:
https://t.co/Mek15QrWv3

[Fullstack Engineering @FullstackZip]

The 5 stages of an integration:

Denial — "The docs say it's just a few calls"
Anger — "Why didn't they mention this?!"
Bargaining — "There's gotta be an npm pckg"
Depression — "Guess I'm not going to brunch"
Acceptance — eats two boiled eggs

https://t.co/4ehpnMidAK