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.
Describe your need, get a tailored program and a pre-filled quote in 3 min. A 100% free call with an advisor.
1 seat held for the next session
Request a call back and an advisor reaches you within 24 business hours, Monday to Saturday.

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.
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.
Don't let this gap widen
Without expert Ruby mastery, 40% of backend apps crash under load according to Stack Overflow surveys, costing SMEs 250k€/an in downtime.
Developers stagnate, risking 20% lower salaries vs certified experts, companies lose 30% productivity on legacy refactoring.
Avoid career obsolescence and costly audits, invest in scalable skills now to boost ROI on critical projects.
Dive into define_method and metaclass methods to create custom Domain Specific Languages, apply them to concrete enterprise cases like custom APIs, perform practical exercises with advanced IRB and RSpec for testing, produce a functional DSL deliverable by end of day, integrate patterns like secure monkey patching, while optimizing for code maintainability in production.
Explore stackprof and ruby-prof to identify bottlenecks in expert Ruby applications, optimize with garbage collector tuning and advanced memoization, address real-world high-traffic e-commerce cases, perform benchmarks before/after on legacy code, generate performance reports as deliverables, integrate flamegraphs to visualize hot paths, apply refinements for modularity without global pollution.
Master Thread and Fiber for Ruby parallelism, implement actor patterns with concurrency-safe queues, simulate I/O-bound and CPU-bound workloads in practical exercises, test with concurrent-ruby gem, develop a resilient worker system as a deliverable, analyze race conditions using debug tools, optimize for cloud scalability with Puma and Sidekiq clusters.
Create bundler-ready gems with rake and yard docs, extend with C via FFI and inline::C for performance hotspots, bundle and push to RubyGems, test cross-platform with Travis CI, produce an optimized gem deliverable for heavy parsing, integrate into an existing Rails app, manage versions and dependencies professionally.
Design Ruby microservices with gRPC and Sidekiq, deploy zero-downtime via Capistrano and Docker, configure monitoring with New Relic and Datadog, automate pipelines with GitHub Actions, simulate production failover in hands-on labs, deliver a complete scalable architecture, obtain Qualiopi certification validating enterprise skills.
The Ruby Training - Expert Performance and Scalability Optimization 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.
For the smooth delivery of the Ruby Training - Expert Performance and Scalability Optimization program, the following equipment is required:
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.
Assessment of skills acquired during the Ruby Training - Expert Performance and Scalability Optimization program is performed through:
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.
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.
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.
Each trainer is validated on three criteria: hands-on field expertise, proven pedagogy and alignment with your industry.
30-minute video call between you and the selected trainer to validate the fit, adjust content and clear any final doubts.
No recycled slides. The syllabus is reworked from your real cases: tools, constraints, vocabulary, ongoing projects.
Live evaluations, 30/90/180-day check-ins and a consolidation plan. If the impact misses the mark, we rework it.
A simple promise: you don't pay to discover the trainer on day one. Everything is validated upfront, by you.
Programming LanguagesIndustry-certified
IoT & embedded systemsIndustry-certified
Performance & optimisationIndustry-certified
Programming LanguagesIndustry-certified
Performance & optimisationIndustry-certified
Performance & optimisationIndustry-certified
Performance & optimisationIndustry-certified
Performance & optimisationIndustry-certified
Performance & optimisationIndustry-certified
Performance & optimisationIndustry-certified
Programming LanguagesIndustry-certified
Programming LanguagesIndustry-certified
Programming LanguagesIndustry-certified
Programming LanguagesIndustry-certified
Programming LanguagesIndustry-certified
Programming LanguagesIndustry-certified
IoT & embedded systemsIndustry-certified
IoT & embedded systemsIndustry-certified
IoT & embedded systemsIndustry-certified
IoT & embedded systemsIndustry-certified
IoT & embedded systemsIndustry-certified
IoT & embedded systemsIndustry-certified
Game developmentIndustry-certified
Game developmentIndustry-certified
Game developmentIndustry-certified
Game developmentIndustry-certified
Game developmentIndustry-certified
Game developmentIndustry-certifiedAvailable on-site and remotely. Pick your city to see the local training center.
30 minutes with a learning advisor. No commitment. No sales pitch dressed up as a demo.