Architecture

What is important while designing the techincal part of a service or an application or whatever how you call it.

The goal of a DevOps isn't to manage or put in place all of it. But assist and help teams cover all of these concepts.

What as a DevOps I think about when assisting development teams (Not limited to, you project might requires more things):

Network

DNS
VPC
- Endpoints
- Subnets
Security Groups
Databases
Lambda
S3
API Gateway
- Custom Domain Names
- ACM

Access and Identity (IAM)

Users
Roles
SCP
Organization
Cognito, Auth0, Okta, etc.

Provisioning

Ansible
Cloudformation and/or CDK
Serverless Framework
Docker
Makefile
Terraform

Delivery & Deployment (CD)

CodeBuild
CodePipeline
Pipelines
Jenkins

Integration (CI)

Github Actions
Pipelines

Repository (Github)

Code owners
Access
Monorepo vs. Multi repo

Code Quality

SonarCloud
E2E
Unit and etc.

Lambda

Serverless
Alarms and Monitoring

Documentation

In-code
Diagram as Code
markdown and README

Database

Postgres
MongoDB
Redis*
ORM

Frontend

CloudFront
S3
OAI
and others

Configurations

SSM
Secrets Manager
Ansible Vaults
Sops

Management and Gouvernance

RACI
Ownership
Clear responsabilities
process for new features / technologies / methodologies / etc.
Clear workflow
Weekly post-mortem / Review and Optimization
Rapid Feedback (internal and external)
Strategy to resolve issues
Keep track of incidents

Metrics and Observalibility

Performance
Blockers
Clear goals
Fail Fast
Code maintenance
Code Performance
Productivity
Client satisfaction
Stability
Lead Time
Change fail
Availability
Deployment Frequency
Time To Restore

Security

Audit
Secrets management
GDPR
Compliance in general
Access Control
Assign appropriate permissions/roles

I've put few exemples for each categories, but in reality depending of your expertise, your internal tools and decisions, you will definetely have different items and that's ok ! You should always work with your experts, their experiences will lead you making the proper decisions.

Like Kubernetes isn't covered in these and this is mostly focused on AWS Services.
I'll try to document my Kubernetes Learning path and my list of tools to replace AWS Completely ( it isn't that simple :| )