#HandsOn

A comprehensive course on VyOS — a powerful open-source network operating system. From installation and basic configuration to firewall, VPN, advanced routing (BGP/OSPF), High Availability, VLANs, WireGuard, and real-world production deployment.

Step-by-step instructions for building a medical information system (HIS/EMR/LIS) with Microservices architecture using Quarkus, PostgreSQL and Keycloak. Compliant with HIPAA, HL7 FHIR, Zero Trust security standards. From architectural design, building services, decentralization, data encryption, audit logging to production deployment on Kubernetes. Each article has practical code, ready to be applied to hospitals and medical facilities.

In-depth course on designing and building a Notification system capable of sending millions of emails at once. You'll learn how to design an event-driven architecture with message queues, build high-performance email pipelines, handle rate limiting, retry, and dead letter queues, ensure deliverability with SPF/DKIM/DMARC, and deploy a production-ready system. Combine theory with hands-on practice using Kafka, Redis, PostgreSQL, Amazon SES, SendGrid. Suitable for Backend Engineers, System Architects who want to solve the problem of sending large-scale emails in practice.

Comprehensive course on modern Data Platform architecture from Data Lakehouse to Data Mesh. Includes ETL/ELT Pipeline with Airflow & dbt, Stream Processing with Kafka & Flink, Data Governance & Cataloging, Data Quality Framework, Semantic Layer, and Real-time Analytics. Design an enterprise-grade data platform serving BI, ML, and data-driven decisions. Case studies: Uber, Netflix, Airbnb. Updated 2026.

Comprehensive course on EdTech architecture and Learning Management System (LMS) Platform. Includes Course Management, Video Delivery (HLS/DASH), Assessment Engine, Gamification, Adaptive Learning, Real-time Collaboration, Learning Analytics, and Content Authoring Tools. Designing service systems from EdTech startups to enterprise training platforms. Case studies: Coursera, Udemy, Duolingo. Updated 2026.

In-depth course on Event-Driven Microservices Architecture. Includes Apache Kafka & Pulsar, Saga Pattern, CQRS & Event Sourcing, Outbox Pattern, Exactly-once Semantics, Schema Registry, Dead Letter Queue, and Choreography vs Orchestration. Design an event-driven production-ready microservices system with consistency guarantees. Case studies: Uber, Wix, Booking.com. Updated 2026.

Comprehensive course on FinTech and Payment Platform system architecture from basic to advanced. Including Payment Gateway, Digital Wallet, Double-Entry Ledger System, Fraud Detection, AML/KYC Pipeline, Core Banking Architecture, Lending Platform. Practical integration with VNPay, MoMo, ZaloPay, Stripe. Compliant with PCI-DSS, PSD2 and State Bank of Vietnam regulations. Case studies from leading payment systems in the world and Vietnam. Updated according to FinTech trends 2026.

Comprehensive course on Multi-tenant SaaS Platform architecture from basic to production-ready. Includes Tenant Isolation Strategies, Subscription & Billing Engine, Plugin/Extension Architecture, White-labeling, Onboarding Automation, Feature Flags, Usage Metering, and Self-service Admin Portal. Design a SaaS system that meets thousands of tenants at optimal costs. Case studies from Slack, Notion, Atlassian and leading SaaS platforms. Updated 2026.

Comprehensive course on Platform Engineering and Internal Developer Portal (IDP). Includes Backstage, Service Catalog, Golden Paths, Self-service Infrastructure, Developer Experience (DX), CI/CD Platform, Environment Management, and Internal Tools. Platform design helps developers self-serve infrastructure, increase developer productivity, and reduce cognitive load. Case studies: Spotify (Backstage), Netflix, Airbnb. Updated 2026.

Comprehensive course on Real-time architecture and IoT Platform. Includes MQTT Protocol, Edge Computing, Digital Twin, Time-Series Database (TimescaleDB, InfluxDB), Stream Processing, Device Management, OTA Updates, Real-time Monitoring Dashboard. Applications in Smart Factory, Smart Building, Connected Vehicles, and Agriculture IoT. Practical case studies from AWS IoT, Azure IoT, and Industrial IoT systems. Updated 2026.

Comprehensive course on the HL7 FHIR (Fast Healthcare Interoperability Resources) data standard in healthcare — from theoretical foundation to practical implementation. Covers HL7 history (v2, v3, CDA), FHIR R5 architecture, Core Resources (Patient, Observation, Encounter, Medication, DiagnosticReport), RESTful API (CRUD, Search, Bundle, Transaction), Data Types, Terminologies (ICD-10, SNOMED CT, LOINC), Profiles & Extensions, SMART on FHIR, FHIR Subscriptions, building FHIR Server with FHIR HAPI (Java/Spring Boot), integration with EMR/HIS, Security & Privacy systems (HIPAA, GDPR), and practical applications in Vietnam (Circular 54/2017/TT-BYT, VNEID, Social Insurance). Updated to FHIR R5 (v5.0.0), the latest official version from HL7 International.

The HashiCorp Vault course is comprehensive from basic to advanced, helping you master Secret Management, Encryption as a Service, Dynamic Credentials and Identity-based Security. From installing and configuring Secrets Engines (KV, PKI, Transit, Database, AWS, SSH), Auth Methods (Token, Userpass, AppRole, LDAP, OIDC, Kubernetes), Policies, to advanced topics such as Integrated Storage (Raft), High Availability, Auto-unseal, Vault Agent, Vault Secrets Operator, Enterprise features (Namespaces, Sentinel, Replication, DR), monitoring and production operations. Updated to Vault 1.21.x (latest version 2026), including SPIFFE auth, MFA TOTP self-enrollment, KV v2 version attribution and enterprise security best practices.

The System Architecture course is comprehensive from basic to advanced, helping you master how to design large-scale systems. Includes fundamental knowledge of Scalability, Availability, Consistency, architectural patterns such as Microservices, Event-Driven, CQRS, along with infrastructure components such as Load Balancer, CDN, Caching, Message Queues, Database Scaling. The course combines theory with real-life case studies from Netflix, Uber, Twitter and other large systems. Updated according to modern architectural trends 2026.

The Keycloak course is comprehensive from basic to advanced, helping you master Identity and Access Management (IAM) from installing and configuring Realms, Users, Roles, Clients, to advanced modules such as Identity Brokering, User Federation (LDAP/AD), Authentication Flows, Authorization Services, Multi-Factor Authentication, Organizations, Workflows, Passkeys, and integrating with real applications. Updated to Keycloak 26.x (latest version 2026) running on Quarkus, including production operations, High Availability, Kubernetes Operators and enterprise security best practices.

Comprehensive course on Performance Testing and Penetration Testing according to enterprise standards 2026. From processes, tools, implementation to professional reports. Includes k6, Gatling, Artillery, Burp Suite, Nuclei, OWASP ZAP, Metasploit, Cloud/Kubernetes security testing, AI-powered testing, CVSS v4.0, PTES, OWASP Top 10, Chaos Engineering, SRE practices and compliance frameworks. Practical combat instructions with lab exercises and real-world scenarios.

Comprehensive Docker course from fundamentals to advanced level, helping you master container technology from the first concepts to real-world production deployment. Covers Dockerfile, Docker Compose, Networking, Storage, Security, CI/CD, Docker Swarm, Microservices and best practices for enterprise environments. Updated with Docker Engine 27+ and modern container technologies as of 2026.

Nginx Master Course: From Zero to Hero is a comprehensive course that helps you master Nginx from the most fundamental concepts to advanced techniques in real-world production environments.