Backend Roadmap

The roadmap is made for anyone who wants to become a modern back-end developer, focusing on the world of REST and microservice architecture. It covers everything from basic stuff to advanced technology including publicly available sources, topic-related tasks, and projects to have an idea of the full cycle of developing the backend of modern projects.

1.* Computer Science Foundation

Please visit Computer Science Foundation Roadmap to learn about those topics:

• 1.1 Basics of CS(Computer Science)
• 1.2 Introduction to Data Structures and Algorithms
• 1.3 Introduction to OS(Operating System)
• 1.4 Linux OS
• 1.5 Terminal Commands
• 1.6 Shell Scripting
• 2.1 Git

3.1 HTML+CSS+JS

• Sources

  • HTML, CSS, and Javascript in 30 minutes
  • JavaScript Tutorial for Beginners: Learn JavaScript in 1 Hour

• Practices

  • Write a simple calculator page on web using HTML and CSS.
    Example:
    

3.2 JS

• Sources

  • The Story of Asynchronous JavaScript
  • Async JS Crash Course - Callbacks, Promises, Async Await

• Practices

  • Add functionality and behavior to Your Web Calculator using JS.
    Example:
    

* Project3

• Create a simple X&O game using HTML and JS.
  Example:
  

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4.1 NodeJS

• Sources

  • Node.js Tutorial for Beginners: Learn Node in 1 Hour
  • Asynchronous JavaScript in ~10 Minutes - Callbacks, Promises, and Async/Await

• Practices

  • Create a node web server that reads files from its own source codes based on the entered URL path variable and displays their contexts to a web browser. The default page should display index.js context, other files should be accessed based on the URL path variable. If the file does not exist it should display There is no file with a name {path varibale}.

4.2 REST

• Sources

  • RESTful APIs in 100 Seconds // Build an API from Scratch with Node.js Express
  • How to build a REST API with Node js & Express
  • Build a REST API with Node JS and Express | CRUD API Tutorial

• Practices

• Develop simple in-memory Blogpost CRUD REST APIs using NodeJS+Express.

4.3 Postman TOOL

• Sources

  • Postman Beginner's Course - API Testing

• Practices

  • Testing Blogpost CRUD REST APIs using postman.

* Project4

• Create a simple blogpost website using NodeJS as a web server.

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5.1 Golang

• Sources

  • Go in 100 Seconds
  • Install Go
  • Go / Golang Crash Course
  • A Tour of Go

• Practices

  • Task1: Swap 2 numbers. In this task, a user is asked to enter two numbers and the program will swap two numbers without using the third variable.

  package main
  
  import "fmt"
  
  func main() {
      var a, b int = 3, 4
  
      // fmt.Scanf("%d", &a)
      // fmt.Scanf("%d", &b)
      fmt.Printf("a = %d, b = %d\n", a, b)
      //
      // WRITE YOUR CODE HERE
      //
      fmt.Printf("a = %d, b = %d\n", a, b)
  }

  Example:

  a = 3, b = 4
  a = 4, b = 3
  

  • Task2: isOdd and isEven. Write go functions to check whether a number is even and is odd.

  package main
  
  import "fmt"
  
  func main() {
      var a, b int = 3, 4
  
      // fmt.Scanf("%d", &a)
      // fmt.Scanf("%d", &b)
      fmt.Printf("a = %d, b = %d\n", a, b)
  
      // fmt.Println(a, "is odd: ", isOdd(a))
      // fmt.Println(b, "is even: ", isEven(b))
  }
  
  // func isEven(num int) bool {
  // 	//
  // 	// WRITE YOUR CODE HERE
  // 	//
  // }
  
  // func isOdd(num int) bool {
  // 	//
  // 	// WRITE YOUR CODE HERE
  // 	//
  // }

  Example:

  a = 3, b = 4
  3 is odd:  true
  4 is even:  true
  

  • Task3: Area of a circle inscribed in a square. Find the shaded region by given R(radius of the circle).
    

  package main
  
  import (
      "fmt"
  )
  
  func main() {
      var r float32 = 10.04
  
      // fmt.Scanf("%f", &r)
      fmt.Println("R =", r)
  
      fmt.Printf("Area: %0.2f\n", area(r))
  }
  
  func area(r float32) (area float32) {
      //
      // WRITE YOUR CODE HERE
      //
      return area
  }

  Example:

  R = 10.04
  Area: 86.53
  

  1. FizzBuzz

  package main
  
  func main() {
      for i := 1; i <= 100; i++ {
          FizzBuzz()
      }
  }
  
  func FizzBuzz() {
      //
      // WRITE YOUR CODE HERE
      //
  }

  2. Find a weekday from a given date

  package main
  
  import (
      "fmt"
      "time"
  )
  
  func main() {
      dobStr := "20.04.1998" // Replace this date with your birthday
      givenDate, err := time.Parse("02.01.2006", dobStr)
      if err != nil {
          panic(err)
      }
      fmt.Printf("%s is %s", givenDate.Format("02-01-2006"), FindWeekday(givenDate))
  }
  
  func FindWeekday(date time.Time) (weekday string) {
      //
      // WRITE YOUR CODE HERE
      //
      return
  }

  3. Display numbers from 1 to 100 in reverse order using DEFER

  package main
  
  func main() {
      DisplayNumberInReverseOrderWithDefer()
  }
  
  func DisplayNumberInReverseOrderWithDefer() {
      for i := 0; i < 100; i++ {
          //
          // WRITE YOUR CODE HERE
          //
      }
  }

  4. Write a function to calculate square root. Given a positive number n and precision p, find the square root of the number up to p decimal places using binary search.

  package main
  
  import (
      "fmt"
  )
  
  func main() {
      fmt.Println(MySquareRoot(10, 12))
  }
  
  func MySquareRoot(num, precision uint) (result float64) {
      // DO NOT USE math.Sqrt!
  
      //
      // WRITE YOUR CODE HERE
      //
  
      return
  }

  5. Find the Minimum Number. Link: https://www.hackerrank.com/contests/w30/challenges/find-the-minimum-number/problem

  package main
  
  func main() {
      n := 12
      // Read n from input
      DisplayMinimumNumberFunction(n)
  }
  
  // https://www.hackerrank.com/contests/w30/challenges/find-the-minimum-number
  func DisplayMinimumNumberFunction(n int) {
      //
      // WRITE YOUR CODE HERE
      //
  }

* Project5

• Task1: Write a bigint package.
  • func NewInt(num string) (Bigint, error)
  • func (z *Bigint) Set(num string) error
  • func Add(a, b Bigint) Bigint
  • func Sub(a, b Bigint) Bigint
  • func Multiply(a, b Bigint) Bigint
  • func Mod(a, b Bigint) Bigint
  • func (x *Bigint) Abs() Bigint
    Example:
    

  a, err :=bigint.NewInt("988847123412385995937737458959")
  if err != nil {
      panic(err)
  }
  b, err :=bigint.NewInt("21231231231231231231231231233")
  if err != nil {
      panic(err)
  }
  err = b.Set("1") // b = "1"
  if err != nil {
      panic(err)
  }
  c:=bigint.Add(a, b) // c = "988847123412385995937737458960"
  d:=bigint.Sub(a, b) // d = "988847123412385995937737458958"
  e:=bigint.Multiply(a, b) // e = "988847123412385995937737458959"
  f:=bigint.Mod(a, b) // f = "0"

• Task2: Write tests on your own bigint package.

5.2 Gin

• Sources https://github.com/gin-gonic/gin

  • Go Gin REST API Tutorial
  • Golang HTTP API With Gin Gonic - Go Tutorial

• Practices

  • Task1: Develop simple in-memory Blogpost CRUD REST APIs using Golang+Gin.
  • Task2: Testing Blogpost CRUD REST APIs using Golang+Gin

5.3 PostgreSQL

• Sources

  • SQL Explained in 100 Seconds
  • Learn PostgreSQL Tutorial - Full Course for Beginners
  • PostgreSQL CRASH COURSE - Learn PostgreSQL in 2022

• Practices

  • Task1: Write SQL queries into a file to create blogpost database with neccessary tables such as article, author.
  • Task2: Write SQL queries file to fill blogpost database tables with dummy data.
  1. query all articles using params such as filters, offset, limit, sort and order.
  2. query all authors using params such as filters, offset, limit, sort and order.
  3. query author by id with his/her all articles.

5.4 Go + SQLX

• Sources

  • https://github.com/jmoiron/sqlx
  • Golang SQL Beginner Tutorial + SQLX

• Practices

  • Connect Blogpost project to postgreSQL database using golang and sqlx.
  • Add storage to Articles CRUD.

5.5 Migrations

• Sources

  • https://dev.to/techschoolguru/how-to-write-run-database-migration-in-golang-5h6g
  • https://github.com/golang-migrate/migrate
  • https://medium.com/autodesk-tlv/14-rules-for-writing-a-data-migration-ac5630648b58

• Practices

  • Write database migrations to the blogpost project.

5.6 Go + Swaggo

• Sources

  • https://github.com/swaggo/swag
  • Swagger API documentation for Golang project
  • Golang / Go Gin Framework Crash Course 11 | REST API Documentation and Test with Swagger (OpenAPI)

• Practices

  • Write swagger documentation to the Blogpost CRUD REST APIs using Golang+Gin+Swaggo.

* Project6

• Develop a simple blogpost REST APIs using Golang + Gin + SQLX(PostgreSQL) + Swaggo (+Include testing).

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6.1 Protocol Buffers (protobuf) and gRPC

• Sources

  • gRPC Introduction
  • Install and Configure Protocol Buffers (protobuf) and gRPC for Go (golang)

• Practices

  • Install and Configure Protocol Buffers (protoc).

6.2 Go + gRPC

• Sources

  • Getting Started with Protocol Buffers in Go - Tutorial
  • Beginners Guide to gRPC in Go!
  • Golang gRPC | Build a Unary Service Method - Part 1
  • gRPC and Go: Developing Efficient and Type-Safe Services - Clinton Kitson, {code}

• Practices

  • Develop article(server) and gateway(client) services. And connect them with gRPC.

7.1 Docker

• Sources
  • Docker in 100 Seconds
  • What Is Docker? | What Is Docker And How It Works? | Docker Tutorial For Beginners | Simplilearn
  • Learn Docker in 7 Easy Steps - Full Beginner's Tutorial
  • Docker Tutorial for Beginners
  • Docker Tutorial for Beginners | Full Course [2021]
• Practices
  • Dockerize your Go app

* Project7

• Building A Containerized Microservices for a simple blogpost project.

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8.1 MongoDB - Pending...

8.2 NodeJS + gRPC - Pending...

* Proejct8 - Pending...

9.1 DB modeling - Pending...

10.1 EDA - Pending...

11.1 Web Socket - Pending...

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References

Fireship | freeCodeCamp.org | TutorialEdge | Traversy Media | CS50 | geeksforgeeks | Coding For Everybody | DoS - Domain of Science | Basics Explained, H3Vtux | LetsCode | Tren Black | OpenCanvas | Neso Academy | Techquickie | DorianDotSlash | Ksk Royal | Linux Tex | Gary Explains | Android and Tech Solutions | Colt Steel | Tech With Tim | Victor Geislinger | devdojo | Programming with Mosh | uidotdev | James Q Quick | JavaScript Mastery | Troy Amelotte | Stephane Maarek | Gopher Guides | Tech and Beyond With Moss | The Linux Foundation | Simplilearn | Amigoscode |

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Backend Roadmap © 2023 by Saidamir Botirov is licensed under CC BY-SA 4.0