Codio
Skills you'll gain: OAuth, Web Development Tools, Authentications, Web Servers, Application Programming Interface (API), Cloud API, Restful API, Servers, JSON, Software Documentation, Javascript, Web Services, Application Security
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: API Design, Restful API, API Gateway, Application Programming Interface (API), Cloud API, Application Lifecycle Management, Enterprise Application Management, Proxy Servers, Software Documentation, Authentications, Authorization (Computing)
Beginner · Course · 1 - 3 Months

Skills you'll gain: Jest (JavaScript Testing Framework), Django (Web Framework), Version Control, Restful API, Responsive Web Design, Unix Commands, HTML and CSS, Git (Version Control System), GitHub, Relational Databases, Object Oriented Programming (OOP), Database Management Systems, Bootstrap (Front-End Framework), React.js, Mobile Development, SQL, Database Design, API Design, Linux Commands, Python Programming
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Restful API, API Design, Application Deployment, Application Programming Interface (API), Authentications, User Accounts, Email Automation, Debugging, Back-End Web Development, Software Testing, Development Testing, Software Development, Database Development, Continuous Integration
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Cucumber (Software), Gherkin (Scripting Language), Behavior-Driven Development, JSON, Restful API, Apache Maven, Application Programming Interface (API), Test Tools, Test Case, Test Planning, JUnit, Test Engineering, Security Testing, Test Automation, Authentications, Test Data, Scalability, Software Testing, Java Programming, Java
Beginner · Specialization · 1 - 3 Months

Coursera
Skills you'll gain: Postman API Platform, Data Validation, Application Programming Interface (API), Restful API, Secure Coding, Verification And Validation, Microservices, Performance Testing, Security Testing, Data Integrity, Authentications
Intermediate · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: JavaScript Frameworks
Beginner · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Model View Controller, Spring Framework, Restful API, Spring Boot, Web Services, JSON, YAML, Java, Web Applications, Configuration Management, Angular, Java Programming, Application Frameworks, Software Architecture, Extensible Markup Language (XML)
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: GraphQL, API Design, Restful API, Application Programming Interface (API), Cloud API, ASP.NET, Authentications, Data Validation, .NET Framework, Authorization (Computing), C# (Programming Language), Web Services, Serverless Computing, Software Documentation, Microsoft Azure, Software Architecture, Server Side
Beginner · Course · 1 - 3 Months

Skills you'll gain: Restful API, Docker (Software), Containerization, Git (Version Control System), Flask (Web Framework), Application Programming Interface (API), Authentications, Application Deployment, Database Management, JSON, Object-Relational Mapping, Continuous Deployment, Python Programming, Object Oriented Programming (OOP), Data Structures
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Swift Programming, Apple iOS, Authentications, Application Programming Interface (API), Restful API, Mobile Development, Data Store
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: API Design, Back-End Web Development, Secure Coding, Data Security, Application Programming Interface (API), Restful API, Server Side, IT Infrastructure, Application Security, Infrastructure Security, Data Integrity, Servers, OAuth, Cloud Security, Server Administration, System Configuration, Encryption, Authentications, Authorization (Computing)
Beginner · Course · 1 - 4 Weeks