DevOps Developer with CircleCI Salary in 2024

Where is CircleCI used?

CircleCI Alternatives

Jenkins

Jenkins is an open-source automation server enabling developers to build, test, and deploy their software. It integrates with virtually any tool in the continuous integration and delivery ecosystem.

# Sample Jenkins Pipeline Script
pipeline {
    agent any
    stages {
        stage('Build') {
            steps {
                sh 'make'
            }
        }
        stage('Test'){
            steps {
                sh 'make check'
            }
        }
        stage('Deploy') {
            steps {
                sh 'make publish'
            }
        }
    }
}

• Free and open source

• Highly configurable with plugins

• Strong community support

• Steeper learning curve for setup and configuration

• Can be resource-intensive

• UI is less modern compared to competitors

Travis CI

Travis CI is a hosted continuous integration service used to build and test projects hosted on GitHub and Bitbucket repositories. It provides a clean and user-friendly interface.

# .travis.yml
language: python
python:
  - "3.6"
script:
  - pytest

• Easy to set up and use

• Seamless integration with GitHub

• Free tier for public repositories

• Limited build customizability

• Builds can be queued for a long time

• Less control over the build environment

GitLab CI/CD

GitLab CI/CD is a part of GitLab, a web-based DevOps lifecycle tool that provides a Git-repository manager with issue tracking and CI/CD pipeline features.

# .gitlab-ci.yml
stages:
  - build
  - test
  - deploy

build_job:
  stage: build
  script:
    - make build

test_job:
  stage: test
  script:
    - make test

deploy_job:
  stage: deploy
  script:
    - make deploy

• Integrated with GitLab for a seamless experience

• Comprehensive CI/CD toolkit

• Docker integration for building and testing

• Primarily tied to GitLab, less portable

• Can be overwhelming with features

• Higher cost for premium features

Quick Facts about CircleCI

CircleCI: The DevOps Magician

Once upon a virtual land in 2011, a pair of coding wizards named Paul Biggar and Allen Rohner invoked a creation spell and poof! CircleCI was born. This spellbinding tool, designed to automatically test software using Continuous Integration (CI), rapidly gained a following among code warlocks for its ability to easily merge their freshly conjured spells into the master grimoire without the dread of an ancient sorcerer's curse (read: bugs).

Exclusive Instant Replay: CircleCI’s Parallel Universes

Leaping through the years like a time-traveling unicorn, by 2017, CircleCI had mastered the art of parallelism. By splitting tasks across multiple containers, it was like wielding a wand that cast multiple efficiency spells at once – "Accio Speedius!" – developers cheered, as build times fell faster than a napping gnome off a bridge.

# Split tests in parallel for maximum efficiency
- run:
    command: |
      case $CIRCLE_NODE_INDEX in
        0) bin/test-directory tests/models ;;
        1) bin/test-directory tests/controllers ;;
        2) bin/test-directory tests/integration ;;
      esac

The Great Leap: CircleCI 2.0

CircleCI's adventurous leap to version 2.0 in 2017 was akin to discovering a secret potion that transformed dusty old code into a sleek phoenix. It introduced the concept of 'Workflows' and 'Jobs', allowing spells - err, builds - to flow more freely and efficiently. No more long waits at the potion seller's! Now, build the engineer could orchestrate complex rituals - I mean, pipelines - without breaking a sweat.

# CircleCI 2.0 example: Defining workflows
workflows:
  version: 2
  build_and_test:
    jobs:
      - build
      - test:
          requires:
            - build

What is the difference between Junior, Middle, Senior and Expert CircleCI developer?

Top 10 CircleCI Related Tech

1. 
   

   Git and GitHub Shenanigans

   
   

   
   At the heart of every CircleCI pipeline, there's a love story featuring Git and GitHub. Surely as a developer, you're committed to your commits, and you push with fervor. CircleCI sashays into this relationship by automagically triggering builds with each push, ensuring your code plays nice before it hits the dance floor.

1. 
   

   Docker Dances

   
   

   
   Picture this: Docker containers are like bento boxes for your code, each snug with all the goodies needed to run it. CircleCI thinks these boxes are pretty cool and lets you use them to harmonize your development environment across the cosmos—or just your team.

   version: 2.1
   jobs:
     build:
       docker:
         - image: circleci/:
   

   
   

    

1. 
   

   YAML Yoga

   
   

   
   You'll need to twist your brain into pretzel shapes to write CircleCI's config in YAML: Yet Another Markdown Language (just kidding, it’s YAML Ain't Markup Language—but don't hold us to that). This finicky yet flexible format is where you’ll script the steps for the CircleCI ballet.

   version: 2
   jobs:
     build:
       steps:
         - checkout
         - run: echo "Hello, YAML!"
   

   
   

    

1. 
   

   Node.js Noodling

   
   

   
   Node.js and its package pal, npm, are like peanut butter and jelly for CircleCI sandwiches. Devs use Node to do JavaScript jazz hands on the server, and CircleCI uses it to ensure those hands are sanitized and won't give the app a cold.

   version: 2.1
   jobs:
     build:
       docker:
         - image: cimg/node:lts
       steps:
         - checkout
         - run: npm install
         - run: npm test
   

   
   

    

1. 
   

   Env Var Voodoo

   
   

   
   CircleCI loves a good environment variable—it's like whispering sweet nothings to your build process. These mystical key-value pairs sneak into your job steps like secret agents, often bearing the secrets to the kingdom: API keys, passwords, and the recipe to your grandma's lasagna.

   jobs:
     build:
       docker:
         - image: circleci/ruby:2.4.1
       environment:
         DATABASE_URL: postgres://username:password@host:port/dbname
   

   
   

    

1. 
   

   Heroku Hijinks

   
   

   
   Deploying your app can be as much fun as a rollercoaster—exhilarating and nausea-inducing. CircleCI and Heroku team up in tandem to streamline this thrill ride, whisking your application off to the cloud with nary a waiver or a wobble. It's magic, with a dash of pixie dust.

   version: 2
   jobs:
     deploy:
       steps:
         - run:
             name: Deploy to Heroku
             command: git push heroku master
   

   
   

    

1. 
   

   Python Pandemonium

   
   

   
   Slithering through your codebase, Python is loved for its readability—unless you’re using someone else’s code, then it's just hieroglyphics. CircleCI embraces Python to automate checks on whether your script is a masterpiece or a madcap mess.

   version: 2
   jobs:
     build:
       docker:
         - image: circleci/python:3.7
       steps:
         - checkout
         - run: pip install -r requirements.txt
         - run: python manage.py test
   

   
   

    

1. 
   

   Cache Caper

   
   

   
   CircleCI caching is about as mysterious as your browser’s cache: you’re not quite sure what it does, but everything’s faster when it works. Store dependencies or compiled stuff so your next build can skip the queue like a VIP at a nightclub.

   version: 2
   jobs:
     build:
       steps:
         - restore_cache:
             key: dependency-cache-{{ checksum "package.json" }}
         - save_cache:
             key: dependency-cache-{{ checksum "package.json" }}
             paths:
               - ./node_modules
   

   
   

    

1. 
   

   Slack Shtick

   
   

   
   Imagine CircleCI is the class tattletale—it can't wait to spill the beans on how your latest build fared. Using Slack notifications, it'll sing like a canary directly into your team channel, ensuring everyone stays in the loop even if they’d rather not.

   version: 2
   jobs:
     notify:
       steps:
         - run:
             name: Send Notification
             command: |
               curl -X POST -H 'Content-type: application/json' \
               --data '{"text":"My build notifications rock!"}' \
               YOUR_SLACK_WEBHOOK_URL
   

   
   

    

1. 
   

   React Rigmarole

   
   

   
   CircleCI and React go together like hipsters and coffee shops; both are modern, trendy, and occasionally overcomplicated. CircleCI makes sure your sleek UI components render like a pro, as opposed to an abstract art project your niece made.

   version: 2.1
   orbs:
     node: circleci/node@4.1
   jobs:
     build-and-test:
       executor: node/default
       steps:
         - checkout
         - node/with-cache:
             steps:
               - run: npm install
               - run: npm test