Rigorous trainer selection
Each trainer is validated on three criteria: hands-on field expertise, proven pedagogy and alignment with your industry.
- Triple validation: technical, pedagogical, sectoral.
- Minimum rating 4.8/5 over the last 12 sessions.
Learning objectives
- Deepen prototypes and inheritance for robust object architectures
- Master closures, modules, and patterns for modular and reusable code
- Implement advanced asynchronous programming with Promises, async/await, and generators
- Optimize performance through profiling, memory management, and efficient algorithms
- Secure applications against common JavaScript vulnerabilities
- Integrate unit and integration tests with Jest and modern tools
- Develop scalable Node.js micro-services
The Learni story
Founded by passionate learning and innovation experts, Learni's mission is to make professional training accessible to everyone, anywhere in the world. Our team operates in major hubs — London, New York, Boston — and internationally, to support talents and organizations in upskilling.
Don't let this gap widen
Why this program matters
Without this advanced training, your JavaScript apps risk cumulative memory leaks causing 50% of crashes, web performance 30% lower as measured by Core Web Vitals, exposing you to XSS attacks affecting 70% of unsecured sites according to OWASP.
Lose hours debugging poorly managed async code, impacting project deadlines by 40%, and stagnate in your career against ESNext-ready juniors.
Save 20k€ annually in maintenance, boost your employability by 25% on LinkedIn, and avoid costly rewrites at 10k€ per faulty app.
Program
Module 1Prototypes and Inheritance: Advanced JavaScript Mechanisms (ES6 classes, prototype chain, custom objects)
Dive into JavaScript prototypes, manipulate inheritance chains through exercises on ES6 classes and super(), create custom objects with extended methods, analyze real e-commerce app cases, produce a deployable inheritable deliverable, and optimize memory for immediate performance gains.
Module 2Closures and Modules: JavaScript Design Patterns (ES modules, IIFE, design patterns)
Explore closures to encapsulate private data, implement ES6+ modules with dynamic import/export, apply patterns like Observer and Singleton through interactive exercises, refactor legacy code into reusable modules, generate a scalable modular deliverable, and boost your productivity from day one.
Module 3Advanced Asynchronous Programming: Promises, async/await, and Streams (Node.js, fetch API)
Master asynchronous programming with Promise chains, async/await for readable code, integrate generators and Streams for large data volumes, simulate REST APIs through Node.js exercises, handle critical errors, produce a smooth asynchronous app deliverable, and transform your real-time workflows.
Module 4Performance and Optimization: JavaScript Profiling (Chrome DevTools, Web Vitals)
Profile your code with Chrome DevTools and Lighthouse, optimize memory using WeakMap and garbage collection, accelerate renders with requestAnimationFrame, test on real mobile web app cases, measure gains up to 40% in speed, deliver a minified optimized bundle, and become a web performance expert.
Module 5Security, Testing, and Deployment: JavaScript Best Practices (Jest, OWASP, CI/CD)
Secure against XSS and injections through OWASP exercises, write Jest tests for 90% coverage, integrate CI/CD with GitHub Actions, deploy scalable Node.js micro-services, analyze real vulnerabilities, produce a certified secure final project, and leave with an impactful professional portfolio.
Evaluation method
- Daily practical quizzes on completed exercises
- Individual final project with expert feedback
- Self-assessment of deliverables and validation quizzes
Learning method
- Intensive hands-on practice with real-world cases and professional tools
- Interactive live coding exercises
- Personalized feedback in small groups
Methods, materials and delivery
The Training JavaScript Advanced - Master High-Performance and Secure Web Apps program is delivered onsite or remote (blended-learning, e-learning, virtual classroom, remote presence). At Learni, an industry-certified training organization, every program is built to maximize skills acquisition regardless of the chosen format.
The trainer alternates between demonstrative, interrogative and active methods (through hands-on labs and/or scenarios). This pedagogical approach guarantees concrete learning that's immediately applicable at work.
Equipment required
For the smooth delivery of the Training JavaScript Advanced - Master High-Performance and Secure Web Apps program, the following equipment is required:
- Mac or PC computers, high-speed fiber internet, whiteboard or flipchart, projector or interactive touch screen (for remote sessions)
- Training environments installed on workstations or accessible online
- Course materials, hands-on exercises and complementary resources
- Post-training access to materials and educational resources
For intra-company training on a site outside Learni, the client commits to providing all required teaching materials (computers, internet, etc.) for the smooth delivery of the program in line with the prerequisites in the communicated program.
* contact us for remote delivery feasibility** ratio varies depending on the program
Skills assessment methods
Assessment of skills acquired during the Training JavaScript Advanced - Master High-Performance and Secure Web Apps program is performed through:
- During training: case studies, hands-on labs and professional scenarios
- End of training: self-assessment questionnaire and skills evaluation by the trainer
- After training: completion certificate detailing acquired skills
Program accessibility
Learni is committed to making its programs accessible. All our programs are accessible to people with disabilities. Our teams are available to adapt the pedagogical methods to your specific needs. Please contact us for any adjustment request.
Enrollment terms and lead times
Learni programs are available inter-company and intra-company, onsite or remote. Enrollments are possible up to 48 business hours before the program starts. Our programs are eligible for corporate funding paths. Contact us to discuss your training project and funding options.
Verified reviews
What our learners
★★★★★
« cool, j'ai appris des trucs »
★★★★★
« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »
★★★★★
« la formation dev etait intense mais grave bien. merci Anthony Khelil »
★★★★★
« 😊👍 »
★★★★★
« bien 👍 »
★★★★★
« Allan Busi t'es au top, continue comme ça. formation géniale »
★★★★★
« cool, j'ai appris des trucs »
★★★★★
« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »
★★★★★
« la formation dev etait intense mais grave bien. merci Anthony Khelil »
★★★★★
« 😊👍 »
★★★★★
« bien 👍 »
★★★★★
« Allan Busi t'es au top, continue comme ça. formation géniale »
★★★★★
« cool, j'ai appris des trucs »
★★★★★
« j'etais perdu au debut mais Ramy Saharaoui m'a pas laché, il a pris le temps. merci vraiment »
★★★★★
« la formation dev etait intense mais grave bien. merci Anthony Khelil »
★★★★★
« 😊👍 »
★★★★★
« bien 👍 »
★★★★★
« Allan Busi t'es au top, continue comme ça. formation géniale »
Our method
Training quality, guaranteed at every step
Before, during, after: we frame the brief, introduce the trainer, tailor the content and measure impact. You stay in control from kickoff to wrap-up.
You meet the trainer beforehand
30-minute video call between you and the selected trainer to validate the fit, adjust content and clear any final doubts.
- Live briefing on goals and team context.
- Veto right — we swap the trainer for free if needed.
Content tailored to your context
No recycled slides. The syllabus is reworked from your real cases: tools, constraints, vocabulary, ongoing projects.
- Hands-on cases drawn from your stack and projects.
- Program co-written then validated by your team.
Continuous quality follow-up
Live evaluations, 30/90/180-day check-ins and a consolidation plan. If the impact misses the mark, we rework it.
- NPS, knowledge quizzes and skills self-assessment.
- Satisfaction guarantee: fully satisfied or free rework.
A simple promise: you don't pay to discover the trainer on day one. Everything is validated upfront, by you.
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