Welcome to the Back-End Engineer Path
歡迎來到後端工程師路徑

Welcome to the Back-End Engineer Career Path! In this path, you will encounter all of the major technologies that a back-end developer should know. You will gain a foundation in JavaScript programming, understand different programming design principles, and build secure back-ends with Node/Express and PostgreSQL. We’ll also make sure to prepare you for the infamous technical interviews you’ll encounter once you begin your job hunt.
歡迎來到後端工程師職業路徑！在這條路徑上，您將遇到所有後端開發人員應該了解的主要技術。您將建立 JavaScript 編程的基礎，了解不同的編程設計原則，並使用 Node/Express 和 PostgreSQL 構建安全的後端。我們還將確保為您準備您一旦開始求職時將遇到的臭名昭著的技術面試。

Learning Objectives 學習目標

After this Path, you will be able to:
完成此路徑後，您將能夠：

Set up your own dev environment and version control your work with Git/GitHub
設置您自己的開發環境並使用 Git/GitHub 進行版本控制
Have a working understanding of front-end technologies
具備對前端技術的工作理解
Write client-side and server-side JavaScript code
撰寫客戶端和服務器端的 JavaScript 代碼
Build and deploy Node/Express back-ends
構建和部署 Node/Express 後端
Design and build PostgreSQL databases
設計並構建 PostgreSQL 數據庫
Use software design and development principles, like OOP, KISS, YAGNI, and DRY
使用軟件設計和開發原則，如 OOP，KISS，YAGNI 和 DRY
Design and document APIs with OpenAPI and Swagger tooling
使用 OpenAPI 和 Swagger 工具設計和記錄 API
Implement security practices to prevent attacks on software applications
實施安全實踐以防止對軟件應用程序的攻擊
Explain common software scaling and caching techniques
解釋常見的軟件擴展和緩存技術
Explain common DevOps techniques and strategies
解釋常見的 DevOps 技術和策略
Explain the core concepts behind operating systems theory
解釋操作系統理論背後的核心概念
Implement common data structures and algorithms in JavaScript
在 JavaScript 中實現常見的數據結構和算法
Pass a JavaScript whiteboard interview
通過 JavaScript 白板面試

Syllabus Pages 課程大綱頁面

We’ve created two types of syllabus pages to help guide you through this journey. You’ve already navigated to this article from the first type: The Career Path Syllabus.
我們創建了兩種類型的課程大綱頁面，以幫助引導您完成這段旅程。您已經從第一種類型的大綱頁面導航到這篇文章：職業路徑大綱。

screenshot of the landing page for the Career Path syllabus

You can use this Career Path Syllabus to see all the topics you’ll need to know to become a back-end engineer — or as a tracker for what you’ve learned and will continue to learn. And from there, you can click on one of the topics listed on the right to access the second type of syllabus: the Unit Syllabus!
您可以使用這份職業路徑大綱來查看成為後端工程師所需了解的所有主題，或者作為您已經學習並將繼續學習的跟蹤器。從那裡，您可以點擊右側列出的主題之一，以訪問第二種類型的大綱：單元大綱！

screenshot of the landing page for the first unit of the Career Path, "Welcome to the Back-End Engineer Path".

The Unit Syllabus is your go-to guide to your current Unit. Each Unit is a major topic that we teach using smaller chunks of content, and each Unit Syllabus contains expandable/collapsible lists of all of those lessons, projects, and other content. For example, in our Setting Up a Dev Environment Unit, we include modules, one with lessons on using the command line, and practice content via a quiz, and projects. We recommend looking at your current Unit Syllabus before you start coding for the day.
單元大綱是您當前單元的指南。每個單元都是我們使用較小的內容塊來教授的一個主題，每個單元大綱都包含所有這些課程、項目和其他內容的可展開/可折疊列表。例如，在我們的建立開發環境單元中，我們包括模組，其中有有關使用命令列的課程，通過測驗進行練習的內容，以及項目。我們建議您在開始編碼之前查看您當前的單元大綱。

Pro tip: Click here to visit the syllabus for the Unit you’re in right now, and then click the “Welcome to the Back-End Engineer Path” button to get back to this page.
專業提示：點擊此處訪問您目前所在單元的大綱，然後點擊“歡迎來到後端工程師路徑”按鈕返回此頁面。

Projects 項目

You will demonstrate your knowledge in several Portfolio Projects that exist throughout the Path. Portfolio Projects are projects that you build on your own computer, following a set of requirements. Each one will be unique to your personal vision and set of interests. You can complete the Portfolio Projects either in parallel with or after taking the prerequisite content—it’s up to you!
你將展示你在整個路徑中存在的幾個投資組合項目中的知識。投資組合項目是您在自己的計算機上構建的項目，遵循一組要求。每個項目將是獨一無二的，符合您的個人願景和興趣。您可以在與或在學習先決內容之後完成投資組合項目-由您決定！

Here’s a preview of the projects featured in this Path:
這是此路徑中特色項目的預覽：

Mixed Messages 混合訊息

Build a Node.js console app that generates random messages each time a user runs the program and version your project with Git/GitHub
建立一個 Node.js 控制台應用程式，每次使用者執行程式時都會產生隨機訊息，並使用 Git/GitHub 為您的專案進行版本控制。

Personal Budgeting, Part I
個人預算，第一部分

Use Node.js and Express to build an API for an app that mimics the practice of envelope budgeting
使用 Node.js 和 Express 构建一个模拟信封预算实践的应用程序的 API

Personal Budgeting, Part II
个人预算，第二部分

Add a PostgreSQL database layer to your budget app and implement software architecture principles like KISS and YAGNI
为您的预算应用程序添加一个 PostgreSQL 数据库层，并实现诸如 KISS 和 YAGNI 等软件架构原则

Photo Caption Contest: 照片說明比賽：

Build an API with Node, Express, and Postgres that uses authentication and authorization best practices to manage an online contest
使用 Node、Express 和 Postgres 構建 API，使用身份驗證和授權最佳實踐來管理在線比賽

Final Back-End Project 最終後端項目

Use everything you’ve learned in the path to build an API of your choosing
利用你在這條路上學到的一切來構建你選擇的 API

Certification Exams 認證考試

We’ve added exams to help you assess your proficiency as you build toward job-ready skills. Here’s how they work:
我們增加了考試，以幫助您評估自己的熟練程度，並朝著具備就業技能的目標努力。這是它們的運作方式：

You’ll find exams on your Full-Stack career path syllabus page, at the end of each section.
在每个部分的末尾，您将在您的完整Stack职业道路教学大纲页面上找到考试。
Each exam assesses your knowledge of the concepts and technologies learned in that section. Exams help verify your proficiency — so you can feel confident in your abilities as you build toward a new career.
每个考试都评估您在该部分学习的概念和技术的知识。考试有助于验证您的熟练程度 — 这样您在迈向新职业的过程中可以对自己的能力感到自信。
Each exam is 2 parts. The first is multiple choice and fill in the blank, and the second is coding questions, when applicable to the material. Otherwise, you will encounter additional multiple choice and fill in the blank questions.
每个考试分为两部分。第一部分是多项选择和填空题，第二部分是编码问题，适用于材料的情况。否则，您将遇到额外的多项选择和填空题。
Score at least 70% on both parts of the exam to pass.
至少在考试的两个部分中获得 70%的分数才能通过。
If you don’t pass, no worries! You can retake exams once every 24 hours.
如果您没有通过，别担心！您可以每 24 小时重新参加考试。
Taking or passing exams is not required to complete the path and exams do not factor into your progress percentage. However, exams must be completed and passed to earn your Codecademy Professional Certification. That means, you can now skip past content you are already familiar with and still earn a Codecademy Professional Certification.
参加或通过考试并非完成路径所必需，考试也不计入您的进度百分比。然而，必须完成并通过考试才能获得您的 Codecademy 专业认证。这意味着，您现在可以跳过您已经熟悉的内容，仍然可以获得 Codecademy 专业认证。

Curated Content 精選內容

Throughout this path, you may see some items that aren’t made by the Codecademy team. We’ve included these to ensure that you learn all the topics you need to get your career started. Though we didn’t write them, we’ve vetted them ourselves for technical accuracy and good teaching practices. When possible, we’ve written relevant assessments so that you can check your understanding back on our platform.
在這條路徑上，您可能會看到一些不是由 Codecademy 團隊製作的項目。我們包含這些內容是為了確保您學習所有必要的主題，以便開始您的職業生涯。雖然這些內容不是我們撰寫的，但我們已經自行審核過它們，確保技術準確性和良好的教學實踐。在可能的情況下，我們已經撰寫了相關的評估，以便您可以在我們的平台上檢查您的理解。