Backend Master Class [Golang + Postgres + Kubernetes + gRPC]

Learn everything about backend web development: Golang, Postgres, Gin, gRPC, Docker, Kubernetes, AWS, GitHub Actions

What you will learn

Design database schema using DBML and automatically generate SQL code from it

Deeply understand the DB isolation levels, transactions and how to avoid deadlock

Automatically generate Golang code to interact with the database

Develop a RESTful backend web service using the Gin framework

Secure the APIs with user authentication, JWT and PASETO

Write stronger test set with high coverage using interfaces and mocking

Build a minimal Docker image for deployment and use Docker-compose for development

Set up Github Action to automatically build and deploy the app to AWS Kubernetes cluster

Register a domain and config Kubernetes ingress to route traffic to the web service

Enable automatic issue & renew TLS certificate for the domain with Let’s Encrypt


In this course, you will learn step-by-step how to design, develop and deploy a backend web service from scratch. I believe the best way to learn programming is to build a real application. Therefore, throughout the course, you will learn how to build a backend web service for a simple bank. It will provide APIs for the frontend to do the following things:

  • Create and manage bank accounts.
  • Record all balance changes to each of the accounts.
  • Perform a money transfer between 2 accounts.

The programming language we will use to develop the service is Golang, but the course is not just about coding in Go. The course is divided into 4 main parts:

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  1. In the first part, you will learn deeply about how to design the database, generate codes to talk to the DB in a consistent and reliable way using transactions, understand the DB isolation levels, and how to use it correctly in production. Besides the database, you will also learn how to use docker for local development, how to use Git to manage your codes, and how to use Github Action to run unit tests automatically.
  2. In the second part, you will learn how to build a set of RESTful HTTP APIs using Gin – one of the most popular Golang frameworks for building web services. This includes everything from loading app configs, mocking DB for more robust unit tests, handling errors, authenticating users, and securing the APIs with JWT and PASETO access tokens.
  3. In the third part, you will learn how to build your app with Docker and deploy it to a production Kubernetes cluster on AWS. The lectures are very detailed with a step-by-step guide, from how to build a minimal docker image, set up a free-tier AWS account, create a production database, store and retrieve production secrets, create a Kubernetes cluster with EKS, use Github Action to automatically build and deploy the image to the EKS cluster, buy a domain name and route the traffics to the service, secure the connection with HTTPs and auto-renew TLS certificate from Let’s Encrypt.
  4. The last part is a work-in-progress, where we discuss more advanced backend topics such as managing user sessions, building gRPC APIs, using gRPC gateway to serve both gRPC and HTTP with 1 single implementation of the handler, and embedding Swagger documentation as part of the backend service, etc. We will keep making and uploading new videos, so please come back here to check them out from time to time.

This course is designed with a lot of details, so that everyone, even with very little programming experience can understand and do it by themselves. I strongly believe that after the course, you would be able to work much more confidently and effectively on your projects.



Working with database

Design DB schema and generate SQL code with
Install & use Docker + Postgres + TablePlus to create DB schema
How to write & run database migration in Golang
Generate CRUD Golang code from SQL | Compare db/sql, gorm, sqlx & sqlc
Write unit tests for database CRUD with random data in Golang
A clean way to implement database transaction in Golang
DB transaction lock & How to handle deadlock in Golang
How to avoid deadlock in DB transaction? Queries order matters!
Deeply understand transaction isolation levels & read phenomena
Setup Github Actions for Golang + Postgres to run automated tests


Implement RESTful HTTP API in Go using Gin
Load config from file & environment variables in Go with Viper
Mock DB for testing HTTP API in Go and achieve 100% coverage
Implement transfer money API with a custom params validator
Add users table with unique & foreign key constraints in PostgreSQL
How to handle DB errors in Golang correctly
How to securely store passwords? Hash password in Go with Bcrypt!
How to write stronger unit tests with a custom gomock matcher
Why PASETO is better than JWT for token-based authentication?
How to create and verify JWT & PASETO token in Golang
Implement login user API that returns PASETO or JWT access token in Go
Implement authentication middleware and authorization rules in Golang using Gin

Deploying the application to production

How to build a small Golang Docker image with a multistage Dockerfile
How to use docker network to connect 2 stand-alone containers
How to write docker-compose file and control service start-up orders
How to create a free-tier AWS account
Auto build & push docker image to AWS ECR with Github Actions
How to create a production database on AWS RDS
Store & retrieve production secrets with AWS secrets manager
Kubernetes architecture & How to create an EKS cluster on AWS
How to use kubectl & k9s to connect to a kubernetes cluster on AWS EKS
How to deploy a web app to Kubernetes cluster on AWS EKS
Register a domain & set up A-record using Route53
How to use Ingress to route traffics to different services in Kubernetes
Auto issue & renew TLS certificates with cert-manager and Let’s Encrypt
Automatic deploy to Kubernetes with Github Action

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