CodeSignal Courses

Time Series Forecasting with GRUs

Build and evaluate PyTorch GRU models for multivariate time-series forecasting, including bidirectional, attention-enhanced, and hybrid CNN-GRU architectures.

• CodeSignal
• 1 hour
• Self-Paced
• Free Certificate

Claude Code Basics for Data Visualization

Use Claude Code with Python prompts to create, run, interpret, and improve basic Matplotlib visualizations.

• CodeSignal
• 2 hours
• Self-Paced
• Free Certificate

Visualizing Real-World Data with Claude Code

Use Claude as a coding partner to explore real CSV data and iteratively build accurate, presentation-ready static and interactive visualizations.

• CodeSignal
• 2 hours
• Self-Paced
• Free Certificate

Customizing Claude Code for Reusable Visualization Workflows

Customize Claude Code with project context, slash commands, and reusable Skills for consistent visualization workflows.

• CodeSignal
• 2 hours
• Self-Paced
• Free Certificate

Career Certificate

Introduction to NGINX

Learn to use NGINX as a secure, high-performance gateway for static sites and APIs, extending it with load balancing, caching, monitoring, and Lua.

• CodeSignal
• 11 hours
• Self-Paced
• Free Certificate
• 5 courses

Career Certificate

Mastering Algorithms and Data Structures in Scala 2

Learn to choose, implement, and analyze algorithms and fundamental data structures in Scala for different programming problems.

• CodeSignal
• 9 hours
• Self-Paced
• Free Certificate
• 4 courses

Career Certificate

Master AI Fluency for HR with HCAIC

Build practical AI fluency for HR by learning core concepts, distinguishing major AI types, and applying AI to real HR workflows.

• CodeSignal
• 1 hour
• Self-Paced
• Free Certificate
• 2 courses

Career Certificate

Building Effective Agents with GPT-5 in TypeScript

Build GPT-5 agents in TypeScript using tool integration, agentic patterns, multi-agent orchestration, and asynchronous parallelization.

• CodeSignal
• 7 hours
• Self-Paced
• Free Certificate
• 4 courses

Career Certificate

OWASP Top 10 & Common Attack Vectors with Java (1-5)

Practice identifying and fixing the first five OWASP Top 10 vulnerabilities in a Java web application.

• CodeSignal
• 10 hours
• Self-Paced
• Free Certificate
• 5 courses

Career Certificate

Transcribing Videos with OpenAI Whisper and Go

Use OpenAI Whisper API with Go to transcribe local, remote, and large video files, then build a video summarization system.

• CodeSignal
• 4 hours
• Self-Paced
• Free Certificate
• 3 courses

Career Certificate

Building an AI Cooking Helper with Node.js

Build a smart cooking API with Node.js, combining database modeling, searchable endpoints, and AI-generated structured recipes.

• CodeSignal
• 10 hours
• Self-Paced
• Free Certificate
• 4 courses

Career Certificate

Building a Frontend for our Cooking Helper with Angular

Build an Angular cooking helper frontend with reusable layouts, interactive recipe views, and a guided cooking flow featuring text-to-speech, timers, shortcuts, and ratings.

• CodeSignal
• 11 hours
• Self-Paced
• Free Certificate
• 4 courses

Career Certificate

RNNs for Time Series with PyTorch

Build recurrent neural networks in PyTorch to forecast univariate and multivariate time series with LSTMs and GRUs.

• CodeSignal
• 4 hours
• Self-Paced
• Free Certificate
• 4 courses

Career Certificate

AI-Assisted Data Visualization with Claude Code

Use Claude Code to create interactive data visualizations and automate reusable analysis workflows.

• CodeSignal
• 5 hours
• Self-Paced
• Free Certificate
• 3 courses

Creating Images with Gemini and Go

Use Go and Gemini’s API to generate images, refine prompts with style and photography modifiers, and place styled text in AI-generated visuals.

• CodeSignal
• 2 hours
• Self-Paced
• Free Certificate