Spring Boot is the default way to build a Java backend, and it assumes you already have what this path teaches: Java itself, SQL for the database behind the service, a Linux terminal, Git and Docker. Learn them in that order, free and in your browser, with a certificate at the end of each course.
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A path certificate at the end, plus 8 along the wayEach step is an existing Coddy course, and the first step's Start button opens the Java course. Take them in order, or start from the one you are missing: progress is saved per course either way.
SELECT, WHERE, JOIN, GROUP BY, subqueries, indexes and schema design, written against live tables. Hibernate and Spring Data generate SQL from your entities; this step is how you read what they send and fix it when a query is slow.StartDedicated pageWrite real code, query databases, build websites, and master AI prompts. Our interactive lessons cover every skill modern developers need.
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Promotion zoneRead, listen, test yourself, ask the AI, or look up anything you've already covered. Every lesson meets you where you are.
A variable is a named container that stores a value you can reference later in your program.
In Python, you create one by writing the name, an equals sign, then the value you want to store.
The value can change over time. Reassigning the name simply points it to a new value.
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@RestController turns a class into HTTP endpoints, @Autowired injects what it depends on, and @Transactional wraps a method in a database transaction. The Java course's classes, interfaces and generics are what make those annotations readable instead of magic.Yes, for most kinds of backend. The JVM is fast once it has warmed up, the ecosystem covers almost every need (Spring for web services, Hibernate for databases, mature clients for Kafka, Redis and every major cloud), and static types keep a large codebase maintainable across a big team. Its weak spots are verbosity and startup time, which matter more for short-lived functions than for a service that runs for weeks; Quarkus and GraalVM native images exist to close that gap.
Java itself (classes, interfaces, collections, generics and exceptions), SQL, a framework (usually Spring Boot, with Spring Data JPA for the database), REST API design, a build tool (Maven or Gradle), unit tests with JUnit, and the tools around the code: Git, a Linux terminal and Docker. This path covers Java, SQL, Linux, Git and Docker; the framework, the build tools, REST and testing are the next layer.
For most jobs, yes: Spring Boot is the most widely used Java backend framework, with Quarkus, Micronaut and Jakarta EE as the alternatives you will meet. This path does not teach Spring yet, on purpose: Spring leans on classes, interfaces, generics and SQL, so it goes much faster once the Java course and the SQL step are behind you.
Both are strong, and they suit different jobs. Java has the larger ecosystem and the enterprise market: banks, insurers and large companies with Spring codebases. Go is a smaller language that compiles to one binary and starts in milliseconds, which is why cloud infrastructure and platform teams favor it. For the widest choice of employers, start with Java; if cloud and infrastructure work appeals more, Go. Coddy's backend path is taught in both, with the same four steps after the language.
Starting from zero, at an hour a day: the Java course takes five to six weeks, SQL two to three, and Linux, Git and Docker about a month together, so roughly three months for the foundations on this path. Job-ready usually means Spring Boot and one real project on top: a REST API with a database, tests and a Dockerfile, in a Git repository someone else can read.
Yes. Every course on it is free: the Java lessons, the SQL and terminal exercises, Bugsy's hints and a certificate for each course you finish, each verifiable at its own URL. Java compiles and runs server-side, so there is no JDK or IDE to install.
Yes. Finish every step and you get one free certificate for the whole Backend Developer path. It lists each course you finished on the way, and links each course's own certificate, so anyone can check every skill it names. You can add it to your LinkedIn profile. It is a certificate of completion from Coddy, not an accredited qualification.
