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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 Dallas in July 2026 with Learni. Certified, expert trainers, eligible for employer funding. Free quote.
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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 Fastify expertise, your APIs lag at 300ms latency vs 10ms, causing 45% user drop-offs and -25% conversions.
Weak scalability downtimes cost 15k€/month in lost revenue.
Competitors on Nest/Express outpace you, dev talents flee to modern techs.
70% backend teams stagnate without framework upgrades, risking failed security audits and GDPR fines.
Lose tech lead: slow APIs = unhappy clients, 30% churn.
Invest 28h for x10 performance, zero vulnerabilities, undisputed leadership.
The Training Fastify Expert - Ultra-Fast and Scalable 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 Training Fastify Expert - Ultra-Fast and Scalable 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 Training Fastify Expert - Ultra-Fast and Scalable 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.
Dive into Fastify internals, benchmark vs Express for x5 speed gains, implement onRequest/onResponse hooks for auth and metrics, code live exercises on real REST APIs, produce a prototype server with advanced logs, Grafana dashboards, and immediate sensations of raw power.
Master strict validation with integrated Ajv, define complex schemas for POST/PUT, handle custom 400 errors, apply exercises on massive e-commerce payloads, generate auto OpenAPI docs, deploy injection-proof secure routes, boost critical API reliability in a snap.
Create custom Fastify plugins for Redis caching, integrate gRPC inter-services, scale via native clustering and PM2, simulate 10k req/s loads in hands-on workshops, optimize memory and CPU, deliver resilient microservices architecture, master smooth horizontal deployment.
Secure with JWT guards and rate-limiter, test unit/integration via Tap, benchmark Artillery for 99.9% SLA, containerize with Docker/K8s, deploy CI/CD GitHub Actions, finalize capstone certifying project, leave with bulletproof production stack and total confidence.
Target audience
Senior Node.js developers, backend leads, software architects upskilling in Fastify.
Prerequisites
5+ years Node.js expertise, mastery of Express/NestJS, async/await patterns, NoSQL/relational database basics.
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