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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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30 free minutes with a training advisor — no commitment.
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Professional Training training in Memphis in October 2026 with Learni. Certified, expert trainers, eligible for employer funding. Free quote.
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Don't let this gap widen
Without mastering Express, 70% of junior backend offers remain inaccessible, according to LinkedIn 2023.
Lose 3 months fumbling alone on outdated tutorials, facing certified competitors who deploy APIs in 48h.
Risk costly security flaws: 40% of API breaches due to poor middleware config, per OWASP.
Your company stagnates without fast Node.js backend, impacting 25% of revenue in slow e-commerce.
Invest 21h to avoid these losses and secure +30% freelance missions.
The Express Training - Build High-Performance Backend APIs 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 Express Training - Build High-Performance Backend APIs 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 Express Training - Build High-Performance Backend APIs 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.
Discover Express.js by installing Node.js and npm, create your first server with app.listen, define GET/POST routes for simple REST APIs, handle parameters and query strings through practical exercises on a real todo-list API case, produce your first middlewares to log requests, and validate with Postman tests for immediate skill-building.
Dive into data management by connecting Express to MongoDB via Mongoose, implement full CRUD on a users collection with guided exercises, chain middlewares for validation and basic authentication, handle errors globally for robust apps, and build an intermediate deliverable: a functional users API ready for integration.
Secure your API with JWT for authentication, implement CORS and rate limiting via dedicated middlewares, test exhaustively with Mocha/Chai on real scenarios, prepare deployment on Heroku by optimizing package.json and environment variables, and finalize a complete deployed project that is accessible and scalable to boost your professional portfolio.
Target audience
Frontend developers in transition, web integrators, freelancers, and technical project managers looking to upskill on Node.js backend.
Prerequisites
JavaScript basics, notions of Node.js and HTTP.
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