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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.
Which format do you prefer?
30 free minutes with a training advisor — no commitment.
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Professional Training training in New York in September 2026 with Learni. Certified, expert trainers, eligible for employer funding. Free quote.
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Don't let this gap widen
Without this training, your Java apps stagnate: JVM performance degraded by 30-50% under high loads, invisible bugs with legacy code costing 20h/week in debugging, lag on Java 21 exposing to security vulnerabilities (recent CVEs), unstable microservices generating 15% downtime, lost competitiveness against trained teams (salaries +25% for certified experts).
Invest 7h to avoid annual losses of 50k€ in inefficient production and urgent maintenance.
The Training Java Expert - Optimize Your Apps for Maximum Performance 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 Training Java Expert - Optimize Your Apps for Maximum Performance 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 Training Java Expert - Optimize Your Apps for Maximum Performance 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.
Dive into Java 21 to code ultra-efficient Virtual Threads, test them on massive concurrency exercises, profile your JVM with VisualVM and Mission Control to gain 40% performance, implement records and pattern matching on real client cases, build a resilient microservice with Reactor and Docker, deliver an optimized project ready for production, leave boosted and ready to scale your apps.
Target audience
Senior Java developers, lead developers, software architects upskilling on modern Java.
Prerequisites
Advanced mastery of Java 11+, 5 years of backend experience, JVM knowledge, Spring Boot and multithreading.
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