Reactive programming courses can help you learn asynchronous data streams, event-driven architecture, and the principles of reactive systems. You can build skills in handling real-time data, managing state changes, and implementing backpressure strategies. Many courses introduce tools like RxJava, Reactor, and Akka, that support building responsive applications and integrating with APIs. By exploring these topics, you’ll gain practical experience in creating applications that efficiently respond to user interactions and system events.

Scrimba
Skills you'll gain: Data Structures, Programming Principles, Python Programming, User Interface (UI), Scripting, Scripting Languages, Computer Programming, Web Development Tools, Software Engineering, Web Development
Beginner · Course · 1 - 4 Weeks

Duke University
Skills you'll gain: Data Import/Export, Pandas (Python Package), Generative AI, OpenAI, LLM Application, Application Programming Interface (API), Data Manipulation, Data Processing, Jupyter, Database Development, Python Programming, Machine Learning
Intermediate · Guided Project · Less Than 2 Hours

Cisco Learning and Certifications
Skills you'll gain: Software-Defined Networking, Network Engineering, Network Architecture, Scripting, Application Programming Interface (API), Data Modeling, General Networking, Network Planning And Design, Automation, Network Infrastructure, Linux Commands, Python Programming, Network Protocols, Command-Line Interface
Intermediate · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Tidyverse (R Package), Ggplot2, Data Wrangling, Exploratory Data Analysis, Plot (Graphics), R Programming, Data Import/Export, Predictive Modeling, Data Visualization, Data Visualization Software, Statistical Hypothesis Testing, Data Analysis, Data Manipulation, Data Modeling, Regression Analysis, Web Scraping, Data Presentation, Data Science, R (Software), Data Analysis Software
Beginner · Specialization · 3 - 6 Months
Skills you'll gain: Performance Tuning, Django (Web Framework), Authentications, PostgreSQL, Object-Relational Mapping, Model View Controller, Cloud Hosting, User Accounts, Application Security, Configuration Management, Python Programming
Advanced · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Package and Software Management, Linux Administration, Linux, Linux Commands, Virtual Private Networks (VPN), Linux Servers, System Monitoring, Operating System Administration, Public Key Infrastructure, Ubuntu, Version Control, File Management, Command-Line Interface, Intrusion Detection and Prevention, Git (Version Control System), File Systems, User Accounts, Firewall, Cloud Computing Architecture, DevOps
Beginner · Specialization · 3 - 6 Months

University of Colorado System
Skills you'll gain: Penetration Testing, Application Security, Vulnerability Scanning, Secure Coding, Exploitation techniques, Software Design Patterns, Vulnerability Assessments, Amazon Web Services, SQL, Amazon Elastic Compute Cloud, Operating Systems, C (Programming Language)
Intermediate · Course · 1 - 4 Weeks

Yonsei University
Skills you'll gain: Apache Spark, Augmented Reality, Cloud Computing Architecture, Big Data, Wireless Networks, SPSS (Software), SPSS, Augmented and Virtual Reality (AR/VR), Cloud Computing, Internet Of Things, Live Streaming, Cloud Platforms, Analytics, Real Time Data, Telecommunications, Multimedia, Emerging Technologies, Mobile Development, Apple iOS, Display Devices
Beginner · Specialization · 3 - 6 Months
Duke University
Skills you'll gain: Database Design, MySQL, Relational Databases, SQL, Data Modeling, Databases, Business Analytics, Big Data, Business Analysis, Data Analysis, Data Management
Mixed · Course · 1 - 3 Months

Skills you'll gain: Data Import/Export, C++ (Programming Language), C and C++, Data Structures, File Management, Computer Programming, Computer Science, Data Storage
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: LangChain, Prompt Engineering, Large Language Modeling, Generative AI Agents, LLM Application, Tool Calling, ChatGPT, Responsible AI, Artificial Intelligence and Machine Learning (AI/ML), Artificial Intelligence, Agentic systems, Application Programming Interface (API), OpenAI, Google Gemini, Automation, Generative AI, Application Development, Development Environment, Prompt Engineering Tools, Python Programming
Intermediate · Specialization · 1 - 3 Months

Wesleyan University
Skills you'll gain: Classification And Regression Tree (CART), Decision Tree Learning, Predictive Modeling, Random Forest Algorithm, Applied Machine Learning, Predictive Analytics, Unsupervised Learning, Machine Learning, Supervised Learning, Data Analysis, Data Mining, Feature Engineering, Exploratory Data Analysis, Regression Analysis, Statistical Analysis, Statistical Methods, Python Programming
Mixed · Course · 1 - 4 Weeks