CodeSignal Courses

Career Certificate

Navigate 1:1 Conflict with Clarity

Handle one-on-one conflict constructively by speaking directly, de-escalating tension, and using curiosity to uncover what matters.

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

Career Certificate

The Essentials of Teamwork

Build essential teamwork skills by strengthening relationships, aligning shared goals, promoting accountability, and leveraging diverse team strengths.

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

Career Certificate

Building a Cooking Helper Frontend with Flask

Build a Flask and Jinja cooking helper frontend with dynamic recipes and a guided cooking flow featuring TTS, timers, shortcuts, and ratings.

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

Career Certificate

Building Effective Agents with Claude in TypeScript

Build Claude agents in pure TypeScript using direct Anthropic API calls, with tool integration, agentic patterns, multi-agent orchestration, and asynchronous parallelization.

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

Career Certificate

Implementing AI Algorithms from Scratch in C++ (Part 2)

Implement ensemble, unsupervised, clustering, and neural-network algorithms from scratch in C++ for hands-on AI development.

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

Career Certificate

Implementing AI Algorithms from Scratch in C++ (Part 1)

Implement core machine learning algorithms from scratch in C++, including regression, classification, and gradient-descent optimization.

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

Career Certificate

Mastering Clustering in Machine Learning with R

Learn to apply K-means, hierarchical, and density-based clustering in R, with data preprocessing and validation techniques for assessing cluster performance.

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

Career Certificate

Secure Python Application following OWASP Risks 6-10

Learn to harden FastAPI applications against OWASP Top 10 risks through authentication, MFA, data integrity, secure configuration, SSRF prevention, and monitoring.

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

Career Certificate

Mastering Algorithms and Data Structures in Kotlin

Aprende a elegir, implementar y analizar algoritmos y estructuras de datos en Kotlin, desde hashing y ordenamiento hasta listas enlazadas.

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

Career Certificate

Apply Critical Thinking Skills

Build practical critical-thinking habits to analyze data, make sound decisions, communicate reasoning clearly, and turn choices into effective action.

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

Career Certificate

Foundations of Critical Thinking

Builds pre-decision critical thinking skills to frame problems, weigh diverse evidence, reduce bias, anticipate outcomes, and make recommendations.

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

Career Certificate

Implementing OAuth and API Key Authentication with Python

Implement OAuth 2.0 and API key authentication in Python/FastAPI, building secure login flows and defending against common vulnerabilities.

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

Career Certificate

Building Effective Agents with GPT-5 in Python

Build GPT-5 agents in pure Python with direct API calls, tool integration, autonomous patterns, multi-agent orchestration, and asynchronous parallelization.

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

Career Certificate

Implementing OAuth and API Key Authentication with TypeScript

Learn OAuth 2.0 and API key authentication in TypeScript by exposing vulnerabilities before implementing secure authorization and token-management solutions.

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

Career Certificate

Building a Smart Email Assistant with Mastra

Build a smart email assistant with Mastra, progressing from basic agents to document-grounded responses and robust multi-step workflows.

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