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 mastery of ServiceStack to build high-performance REST APIs in .NET, your web services suffer chronic latency and inevitable server overloads.
65 % of production incidents in .NET applications stem from poorly optimized APIs, generating an average of 25 hours of monthly downtime – a direct cost of 18 000 € per 10-developer team in lost productivity and emergency rewrites.
Your company loses client contracts and exposes its scalability to competitors while developers stagnate against modern stacks.
Every quarter without ServiceStack expertise widens a fatal competitive gap in an ecosystem where seamless APIs determine business survival.
Presentation of ServiceStack and comparison with alternatives (ASP.NET Core Web API, WCF). Installation and configuration in a .NET project. ServiceStack project structure, routes, and DTOs. Creation of a first simple REST API. Unit tests and understanding of the ServiceStack request pipeline. Practical exercises.
Validation and error management. Configuring middlewares and lifecycle hooks. Introduction to authentication: Auth Providers, user session management, security configuration. Applying best practices for writing testable, maintainable, and scalable services. Exercises implementing secure services.
Using Redis Cache, persistence management (supported ORMs, database configuration with OrmLite), useful plugins (OpenAPI/Swagger, validation, CORS, logs). Managing serialization formats (JSON, XML, CSV, protobuf). Automating tests and deployments, monitoring, and scaling scenarios. Experience feedback, code review of ServiceStack APIs, advice for production rollout, migration management, and post-deployment support.
The Training: Developing High-Performance REST APIs with ServiceStack in .NET: From Beginner to Mastery 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 Training: Developing High-Performance REST APIs with ServiceStack in .NET: From Beginner to Mastery 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 Training: Developing High-Performance REST APIs with ServiceStack in .NET: From Beginner to Mastery 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.
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Web 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.