Duration: 6 weeks (1.5 months).

Level: Intermediate (solid knowledge of Ruby and Rails).

Format: Online lectures, practical assignments, mentoring, code reviews, consultations.

Tools: Rails API, RSpec, FactoryBot, Faker, Sidekiq, Redis, Docker, CI/CD, Postman.

Outcome: A high-quality backend project with API, tests, and production practices.

Detailed course program

Module 1: Creating a JSON API with Rails (Week 1)

• Creating an API-only application on Rails (–api mode);
• Routing for API: namespace, versioning;
• Controllers and JSON serialization (ActiveModelSerializers, JBuilder);
• Error handling and HTTP statuses;
• API documentation (Swagger, OpenAPI).

Module 2: Testing APIs (Week 2)

• RSpec for APIs: writing requests, testing endpoints;
• FactoryBot and Faker for fixtures and test data generation;
• Testing validations, authorization, API responses;
• Integration and system tests.

Module 3: Working with background tasks (Week 3)

• Introduction to Sidekiq and Redis;
• Setting up and running background tasks;
• Scheduling and monitoring tasks;
• Error handling and retries;
• Practice: sending emails, handling file uploads.

Module 4: Optimization and caching (Week 4)

• Using cache (Rails.cache, Memcached, Redis);
• Optimizing ActiveRecord queries (eager loading, includes, select);
• Database indexes and performance analysis;
• Logging and monitoring queries.

Module 5: Docker and CI/CD (Week 5)

• Creating a Dockerfile for Rails API;
• Docker Compose for local development;
• Setting up CI/CD (GitHub Actions, GitLab CI, CircleCI);
• Test and deployment automation;
• Best practices for production.

Module 6: Working with external APIs and webhooks (Week 6)

• Integration with external services (REST, OAuth);
• Webhook processing: receiving and validating requests;
• Processing asynchronous events;
• Practice: integration with payment systems, messengers.

Final project:

• Developing a full-fledged JSON API for a mobile application or admin panel;
• Implementing authentication (JWT or OAuth);
• Setting up background tasks, tests, and deployment via Docker and CI/CD;
• Integration with external services (e.g., payments or notifications).

What you will gain:

• A deep understanding of backend development in real projects;
• Skills in writing high-quality tests and automation;
• Experience working with advanced tools and architecture;
• Skills in deploying and supporting production systems;
• A full-fledged project for your portfolio and resume;
• Personal consultations and code reviews from an experienced mentor.

Cost: from $349.