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Founded by passionate advocates of learning and innovation, Learni set out to make professional training accessible to everyone, everywhere in the world. Our team works in the largest cities such as Paris, Lyon, Marseille, and internationally, to support talents and organizations in their skills development.
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Don't let this gap widen
Without mastery of high-performance API development with Express.js, Node.js applications suffer from chronic scalability failures, leading to 40% higher debugging time per developer.
A single unoptimized API outage costs businesses an average of $9,000 per minute in lost revenue, with 65% of server-side incidents traced to Express.js misconfigurations per recent DevOps reports.
This exposes companies to reputational damage, delayed product launches, and competitive disadvantages, while careers stall amid mounting project failures.
Every month without these skills amplifies risks, turning potential growth into escalating financial losses.
The Creating High-Performance APIs with Express.js – Complete Training for Developers training is delivered in-person or remotely (blended-learning, e-learning, virtual classroom, remote in-person). At Learni, a Qualiopi-certified training organization, each program is designed to maximize skills acquisition, regardless of the training mode chosen.
The trainer alternates between demonstrative, interrogative, and active methods (through practical exercises and/or real-world scenarios). This pedagogical approach ensures concrete and directly applicable learning in the workplace.
To ensure the quality of the Creating High-Performance APIs with Express.js – Complete Training for Developers training, Learni provides the following teaching resources:
For in-house training at a location external to Learni, the client ensures and commits to having all necessary teaching materials (IT equipment, internet connection...) for the proper conduct of the training action in accordance with the prerequisites indicated in the communicated training program.
The assessment of skills acquired during the Creating High-Performance APIs with Express.js – Complete Training for Developers training is carried out through:
Learni is committed to the accessibility of its professional training programs. All our training programs are accessible to people with disabilities. Our teams are available to adapt teaching methods to your specific needs. Do not hesitate to contact us for any accommodation request.
Learni training programs are available for inter-company and intra-company settings, both in-person and remote. Registration is possible up to 48 business hours before the start of training. Our programs are eligible for OPCO, Pôle emploi, and FNE-Formation funding. Contact us to discuss your training project and funding possibilities.
Introduction to Node.js and Express.js. Installation, project creation, dependency management, Express application architecture, basic routes, request and response handling, middleware concepts. First exercises on simple routes and endpoints.
RESTful structure: resources, HTTP methods, nested endpoints. Using error handling middleware, authentication (JWT, sessions), third-party middleware for request analysis (body-parser, helmet, cors), protection against common threats (XSS, injections), data validation (Joi, express-validator). Exercises on implementing authentication and securing APIs.
Connecting the Express application to MongoDB (Mongoose) or PostgreSQL (via Sequelize or pg). Creating models, full CRUD operations. Introduction to unit and integration tests with Mocha/Chai or Jest. Advanced logging (winston, morgan). Preparing deployment: environments, variables, configuration management, hosting (Heroku, OVH, AWS). Q&A session and final mini-project.
Target audience
Web developers, software engineers, IT technicians wishing to develop server-side applications with Node.js and Express
Prerequisites
Good proficiency in JavaScript and basic knowledge of asynchronous programming (promises, callbacks)
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