Training JavaScript Expert - Master Modern Advances

Very demanding course · Expertise required

$3,150

  • 2 days
  • Onsite
  • 10 people max.
Ref: VMS466
10 people max.
$3,150
In-company rate: from $5,723 for the whole teamExpertise rate: $1,575 per day, reflecting the difficulty level
On-site and certification exam on quote
2 days
Onsite

Don't let this gap widen

Why this program matters

  • Without expert JavaScript mastery, your apps lose 40% of performance due to invisible memory leaks, tripling user crashes according to Stack Overflow.

  • Legacy non-async code causes 50% of production bugs, delaying releases by weeks.

  • Facing ES2023, 70% of senior devs stagnate, losing contracts to agile competitors.

  • Risk failed security audits, exposing you to breaches costing 100k€ on average?

  • Invest 14h to boost project ROI x5, avoid team turnover frustrated by obsolete tech.

Célian Lebacle, Learni trainer · Web & mobile expert
Célian Lebacle

Learni trainer · Web & mobile expert

73%productivity gap
×3cost of inaction
Flag of the United StatesBuilt for US teams
Payment by wire transferEnhanced confidentialityPerfect for companies with 50 to 500 employeesScheduling to fit any time zone

Trusted by — schools, companies and industrial groups

41,187 programs · 25 countries

  • Aptar
  • ArcelorMittal
  • Equans
  • EDF
  • Ubisoft
  • Microsoft
  • Atos

Every program built with a dedicated engineer

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Companies: Aptar, ArcelorMittal, Equans, EDF, Ubisoft, Microsoft and Atos.

JavaScript Expert training objectives

  • Deepen advanced functional paradigms
  • Master async/await, generators and promises
  • Optimize performance with profilers and Web Workers
  • Implement expert design patterns like Observer and Module
  • Develop reusable and scalable ESNext modules
  • Secure applications against common vulnerabilities
  • Integrate modern JavaScript into microservices architectures

Program

JavaScript Expert curriculum: 2 modules over 2 days

Module 1 : Day 1: Advanced JavaScript - Async, Functional and Modules (Node.js, ESNext)

Dive into deep asynchronous mechanisms, code complex flows with async/await and generators on real REST API cases, manipulate advanced closures and higher-order functions via interactive workshops, build and publish custom NPM modules, test everything with Jest for immediately production-applicable deliverables.

Module 2 : Day 2: JavaScript Performance, Patterns and Security (Profilers, Webpack)

Optimize code with Chrome DevTools and Lighthouse on real applications, implement patterns like Proxy, Reflect and advanced State Management, secure against XSS and injections via practical exercises, bundle with Webpack and Vite for fast deployments, complete with a capstone project ready for your professional challenges.

How JavaScript Expert skills are assessed

  • Continuous practical evaluations, coding challenges, certified final project.

How the JavaScript Expert course is taught

  • 70% hands-on workshops, 30% applied theory, personalized feedback.

JavaScript Expert training: access and practical arrangements

The Training JavaScript Expert - Master Modern Advances program is delivered onsite or remote (blended-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 Expert - Master Modern Advances 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 Expert - Master Modern Advances 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

Registration is possible up to 48 business hours before the start of training. All our programs are built for corporate L&D budgets and delivered onsite or remotely.

The Learni story

Founded by engineers and learning experts, Learni's mission is to make high-impact tech training accessible to teams everywhere. We work remotely with organizations across the US and Canada, in your time zone, to help teams upskill fast.

Our method

How Learni guarantees the quality of your JavaScript Expert training

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.

Step 1

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.
Step 2

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.
Step 3

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.
Step 4

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.

A child walking to school with a backpack
Our social commitment

A school kit donated to a child for every training booked

To fight inequalities in access to education, Learni donates a complete school kit to a child in need for every training booked. You build your skills, a child heads back to school.

  • Backpack, notebooks and essential supplies
  • Distributed through our partner charities
  • Included, at no extra cost to you
Enroll and offer a kit
FAQ

JavaScript Expert: frequently asked questions

Which tools are used in JavaScript Expert training?+
Hands-on work runs on node.js, ESNext, profilers and webpack. Those tools come from the JavaScript Expert program itself, delivered on site over 2 days, so participants practise on the stack they will use at work.
What can participants do after JavaScript Expert training?+
They can deepen advanced functional paradigms, master async/await, generators and promises and optimize performance with profilers and Web Workers. Those are the stated objectives of the JavaScript Expert program at Expert level, checked by the end-of-session assessment.
What does the JavaScript Expert program cover, day by day?+
Day 1: Day 1: Advanced JavaScript - Async, Functional and Modules (Node.js, ESNext). Day 2: Day 2: JavaScript Performance, Patterns and Security (Profilers, Webpack). The JavaScript Expert program runs over 2 days, delivered on site.
How is JavaScript Expert training assessed?+
Assessment relies on continuous practical evaluations, coding challenges, certified final project. Learni issues a completion certificate together with the individual assessment report at the end of the JavaScript Expert program, which an L&D team can file as evidence.
How much does JavaScript Expert training cost per participant?+
JavaScript Expert training costs $3,150 per participant. For an in-company team, the flat rate starts at $5,723 for the whole group, up to 8 people. The detailed quote, sent within one business day, adjusts the amount to the format and how far the syllabus is tailored to your team.
How long does JavaScript Expert training take?+
2 days, available live online (US time zones) or on-site at your offices. Half-day tracks spread over several weeks are possible so the team stays operational.
Who pays for JavaScript Expert training?+
Most US teams pay directly through their company L&D or training budget. Learni invoices in US dollars and accepts bank transfer (ACH/wire) or card, with volume pricing for teams. A purchase order is welcome.
What do participants need to know before JavaScript Expert training?+
Expert mastery of JavaScript ES6+, 3 years of experience in complex front/back-end projects, intermediate Node.js.
Is a certificate issued after JavaScript Expert training?+
Yes. A Learni completion certificate is issued, along with the individual evaluation report. Learni is a certified training provider and prepares for third-party certifications, but does not award them itself.
Does Learni provide the equipment for JavaScript Expert training?+
No. A computer and a stable internet connection are required for each participant. Learni provides the learning platform, the trainer and all course materials.
Your professional training, anywhere

Let's build your JavaScript Expert learning path.

30 minutes with a learning advisor. No commitment. No sales pitch dressed up as a demo.

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