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Build Reactive Microservices Using Spring WebFlux/Spring Boot Intermediate

The course 'Build Reactive Microservices Using Spring WebFlux/Spring Boot' teaches developers and backend engineers how to design non-blocking, scalable microservices using Spring WebFlux and Project Reactor, solving performance bottlenecks in high-concurrency environments. With 42% of enterprises adopting reactive architectures for cloud-native applications, mastering this stack enables faster response times and efficient resource utilization under load. You’ll gain hands-on experience with functional routing, reactive REST APIs, and backpressure management using Spring Boot 3.

This course prepares learners for the Spring Certified Professional 2024 certification (exam 2V0-72.22), covering key objectives in reactive programming and Spring Boot. Koenig provides official vendor-authorized courseware and 30-day lab access for continuous practice. You’ll build production-ready reactive systems, positioning yourself for roles in cloud-native development and microservices architecture.

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Course Overview

The course "Build Reactive Microservices Using Spring WebFlux/Spring Boot" by Spring is designed for Java developers, backend engineers, and microservices architects seeking to master non-blocking, event-driven application development. While no specific certification exam is directly tied to this course, it aligns closely with the skills measured in the Spring Professional Develop (2V0-72.22) exam, which validates expertise in modern Spring frameworks. Target roles include Reactive Systems Developer, Cloud-Native Java Engineer, and API Platform Architect. Industry demand for reactive systems is growing, with Spring Boot cited in over 468 permanent job postings across England in the past six months, and roles requiring Spring WebFlux reporting a median salary of £105,000 in the UK, reflecting strong employer adoption for high-performance systems.

This course covers core technologies including Spring WebFlux, Project Reactor, Spring Boot 2.5+, Netty, MongoDB with reactive drivers, and WebClient for non-blocking HTTP communication. Students engage in hands-on labs using standard IDEs like IntelliJ IDEA or Spring Tool Suite, building real-world reactive microservices from the ground up. A key project involves constructing a full reactive movie review system comprising three services: Movies Info Service, Movies Review Service, and a composite Movies Service that aggregates data using non-blocking endpoints. Learners implement annotated and functional controllers, configure tailable cursors with MongoDB for real-time streaming, apply exception handling in WebFlux, and write comprehensive JUnit tests using WebTestClient, simulating production-grade development workflows.

Completing this training prepares candidates for the Spring Certified Professional 2024 certification, a globally recognized credential that validates advanced proficiency in Spring ecosystem tools. Certified professionals command competitive salaries, with Spring Boot developers in the UK earning a median of £75,000 and top-tier roles exceeding £100,000 annually. Koenig Solutions enhances learning with official courseware, 1-on-1 instructor support, and Guaranteed-to-Run batches, ensuring flexibility and mastery. Graduates are positioned to lead in high-impact domains such as fintech, real-time analytics, and scalable cloud platforms, driving innovation in organizations adopting reactive architectures.

What You'll Learn

✓Architect high-performance reactive REST APIs using Flux and Mono types to enable scalable, non-blocking application workflows.
✓Implement non-blocking data access layers with Spring Data Reactive MongoDB to process large data volumes efficiently.
✓Develop resilient microservices communication patterns using Spring WebClient for reliable, asynchronous data exchange.
✓Configure functional endpoints in Spring WebFlux to build flexible, reactive routing logic that improves system responsiveness.
✓Secure reactive microservices using Spring Security to protect sensitive data streams and maintain robust compliance standards.
✓Validate reactive components using Spring WebTestClient to ensure stability and performance across asynchronous execution paths.

Skills You'll Gain

Spring WebFlux Spring Boot Reactive Microservices Non-Blocking I/O Reactor Project Spring WebFlux Functional Endpoints Spring Boot WebFlux Reactive Streams Flux and Mono Spring WebFlux Annotation-Based Controllers Reactive Programming WebClient Integration Netty Server Spring Boot Reactive Auto-Configuration Reactive REST APIs Functional Web Endpoints Reactor Netty Integration

Prerequisites

Recommended knowledge before taking this course
  • Proficiency in Java 17+ features, including lambdas and functional programming, is required for Build Reactive Microservices Using Spring WebFlux/Spring Boot by Spring.
  • Hands-on experience with Spring Boot 3.x and Project Reactor 3.x, including understanding Mono and Flux types and operators.
  • Experience with dependency management and project configuration using Maven or Gradle.
  • A solid understanding of the Reactive Streams specification and non-blocking, event-driven programming models.
  • Familiarity with building RESTful APIs using Spring Web MVC or equivalent frameworks.
  • Experience with non-blocking I/O models and asynchronous programming patterns.
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Certification Exam

Everything you need to know about the Build Reactive Microservices Using Spring WebFlux/Spring Boot certification exam

Exam Details
Exam Name
Build Reactive Microservices Using Spring WebFlux/Spring Boot
Format
Multiple choice, labs & case studies
Questions
Duration
Passing Score
Validity
Retake Policy
Not applicable
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Course Curriculum

Structured learning with hands-on labs and real-world scenarios

1
Day 1– Mastering Reactive Programming Concepts
Why Choose Reactive Programming? Reactive Programming Fundamentals Reactive Streams Specification Standards Spring MVC Architectural Limitations Spring MVC Concurrency Models Traditional Blocking API Analysis Non-blocking System Requirements Reactive Library Ecosystem Overview
2
Day 2– Project Reactor and Reactive Types
Project Reactor Development Setup Flux and Mono Foundations Developing Flux Data Streams Developing Mono Data Streams Advanced Flux Operator Usage Advanced Mono Operator Usage JUnit Reactive Type Testing Production Reactive Type Patterns
3
Day 3– Build Reactive Microservices Using Spring WebFlux
Spring WebFlux Framework Introduction Base Project Architecture Setup Non-blocking REST API Development Reactive ResponseEntity Implementation ControllerAdvice Bean Validation WebFluxTest Unit Testing Strategy WebTestClient Automated Testing ReactiveMongoRepository Data Access
4
Day 4– Reactive Data and Functional Web
MongoDB Reactive Programming Integration ReactiveMongoRepository Custom Queries Functional Web Module Introduction RouterFunction and HandlerFunction Logic Functional Web API Construction Functional Web Unit Testing Functional Web Bean Validation Functional Web Error Handling
5
Day 5– Advanced Reactive Microservices Deployment
Spring WebFlux Internal Architecture Netty Threading Model Optimization WebClient Non-blocking Client Development Network Exception Handling Strategies HTTP Call Retry Mechanisms WireMock Integration Testing Workflows Server Sent Events Implementation WebClient Microservice Connectivity

What's Included in Your Training

Every enrollment comes packed with resources to maximise your learning and exam success

Career Outcomes

85%

of Build Reactive Microservices Using Spring WebFlux/Spring Boot certified professionals report career advancement within 6 months

Salary Impact

+28%

Average salary increase reported after obtaining the Build Reactive Microservices Using Spring WebFlux/Spring Boot certification

Typical Salary Range (Global)
Entry$90,000–$115,000
Mid$115,000–$145,000
Senior$145,000–$180,000

*Source: Glassdoor / LinkedIn 2025

Job Roles

6
  • Reactive Microservices Engineer
  • Senior Spring Boot Developer
  • Cloud-Native Java Developer
  • Reactive Systems Architect
  • Backend Engineer (Reactive)
  • Platform Engineer (Spring WebFlux)

Companies Hiring

5,000+
Microsoft Amazon Google Accenture Deloitte JPMorgan Chase Goldman Sachs Blue Yonder Infosys TCS

and 5,000+ organizations worldwide seeking Build Reactive Microservices Using Spring WebFlux/Spring Boot certified professionals

Real Transformations

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Real results from IT professionals who trained with Koenig — rated 4.9/5 from 18,400+ verified reviews.

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    “Passed AZ-104 on first attempt. The MCT knew the exact exam patterns and the labs were exactly what Microsoft tests. Worth every penny.”

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    Rahul M.

    Azure Administrator

    AZ-104 Certified ✓ Verified
  • ★★★★★

    “I trained 15 of my team members for SC-200. Koenig's on-site delivery was seamless and all 15 passed within 3 months.”

    Sarah K.

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  • ★★★★★

    “The 1-on-1 format was a game changer. My trainer adjusted the pace to my schedule and I cleared PL-300 while working full-time.”

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  • ★★★★★

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    “SC-900 and SC-300 back to back — both cleared first try. The security curriculum at Koenig is incredibly thorough and up to date.”

    Aisha N.

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    SC-300 Certified ✓ Verified
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    “AI-102 was daunting but the trainer broke it down perfectly. Real Azure OpenAI labs made the difference. Highly recommend.”

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    “DP-600 Fabric certification done in 3 weeks of part-time study. The customised schedule around my timezone was a lifesaver.”

    Mei W.

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    Data Platform Engineer

    DP-600 Certified ✓ Verified
  • ★★★★★

    “Our whole DevOps team got AZ-400 certified through Koenig's corporate training. Smooth logistics and top-tier MCTs throughout.”

    Carlos R.

    Carlos R.

    Engineering Manager

    AZ-400 Team Training ✓ Verified
  • ★★★★★

    “Passed AZ-104 on first attempt. The MCT knew the exact exam patterns and the labs were exactly what Microsoft tests. Worth every penny.”

    Rahul M.

    Rahul M.

    Azure Administrator

    AZ-104 Certified ✓ Verified
  • ★★★★★

    “I trained 15 of my team members for SC-200. Koenig's on-site delivery was seamless and all 15 passed within 3 months.”

    Sarah K.

    Sarah K.

    CISO, Financial Services

    Enterprise Client ✓ Verified
  • ★★★★★

    “The 1-on-1 format was a game changer. My trainer adjusted the pace to my schedule and I cleared PL-300 while working full-time.”

    Ahmed R.

    Ahmed R.

    Business Intelligence Lead

    PL-300 Certified ✓ Verified
  • ★★★★★

    “Passed AZ-104 on first attempt. The MCT knew the exact exam patterns and the labs were exactly what Microsoft tests. Worth every penny.”

    Rahul M.

    Rahul M.

    Azure Administrator

    AZ-104 Certified ✓ Verified
  • ★★★★★

    “I trained 15 of my team members for SC-200. Koenig's on-site delivery was seamless and all 15 passed within 3 months.”

    Sarah K.

    Sarah K.

    CISO, Financial Services

    Enterprise Client ✓ Verified
  • ★★★★★

    “The 1-on-1 format was a game changer. My trainer adjusted the pace to my schedule and I cleared PL-300 while working full-time.”

    Ahmed R.

    Ahmed R.

    Business Intelligence Lead

    PL-300 Certified ✓ Verified
  • ★★★★★

    “From AZ-900 to AZ-305 in 6 months. Koenig's structured roadmap and MCT mentoring made the expert level achievable.”

    Priya S.

    Priya S.

    Cloud Solutions Architect

    AZ-305 Expert ✓ Verified
  • ★★★★★

    “As an L&D head I've used 5 training vendors. Koenig's MCT quality, MOC materials, and ESI compliance is in a different league.”

    James T.

    James T.

    Head of L&D, UK Enterprise

    100+ Learners Trained ✓ Verified
  • ★★★★★

    “SC-900 and SC-300 back to back — both cleared first try. The security curriculum at Koenig is incredibly thorough and up to date.”

    Aisha N.

    Aisha N.

    Security Analyst

    SC-300 Certified ✓ Verified
  • ★★★★★

    “From AZ-900 to AZ-305 in 6 months. Koenig's structured roadmap and MCT mentoring made the expert level achievable.”

    Priya S.

    Priya S.

    Cloud Solutions Architect

    AZ-305 Expert ✓ Verified
  • ★★★★★

    “As an L&D head I've used 5 training vendors. Koenig's MCT quality, MOC materials, and ESI compliance is in a different league.”

    James T.

    James T.

    Head of L&D, UK Enterprise

    100+ Learners Trained ✓ Verified
  • ★★★★★

    “SC-900 and SC-300 back to back — both cleared first try. The security curriculum at Koenig is incredibly thorough and up to date.”

    Aisha N.

    Aisha N.

    Security Analyst

    SC-300 Certified ✓ Verified
  • ★★★★★

    “AI-102 was daunting but the trainer broke it down perfectly. Real Azure OpenAI labs made the difference. Highly recommend.”

    David L.

    David L.

    AI Engineer

    AI-102 Certified ✓ Verified
  • ★★★★★

    “DP-600 Fabric certification done in 3 weeks of part-time study. The customised schedule around my timezone was a lifesaver.”

    Mei W.

    Mei W.

    Data Platform Engineer

    DP-600 Certified ✓ Verified
  • ★★★★★

    “Our whole DevOps team got AZ-400 certified through Koenig's corporate training. Smooth logistics and top-tier MCTs throughout.”

    Carlos R.

    Carlos R.

    Engineering Manager

    AZ-400 Team Training ✓ Verified
  • ★★★★★

    “AI-102 was daunting but the trainer broke it down perfectly. Real Azure OpenAI labs made the difference. Highly recommend.”

    David L.

    David L.

    AI Engineer

    AI-102 Certified ✓ Verified
  • ★★★★★

    “DP-600 Fabric certification done in 3 weeks of part-time study. The customised schedule around my timezone was a lifesaver.”

    Mei W.

    Mei W.

    Data Platform Engineer

    DP-600 Certified ✓ Verified
  • ★★★★★

    “Our whole DevOps team got AZ-400 certified through Koenig's corporate training. Smooth logistics and top-tier MCTs throughout.”

    Carlos R.

    Carlos R.

    Engineering Manager

    AZ-400 Team Training ✓ Verified

Frequently Asked Questions

Everything you need to know about the Build Reactive Microservices Using Spring WebFlux/Spring Boot training course

Is the Spring certification exam included in the Build Reactive Microservices Using Spring WebFlux/Spring Boot course fee?
The Spring Certified Professional 2024 (2V0-72.22) exam is not included in the course fee. It must be purchased separately for $250 USD. This fixed fee applies globally. Candidates schedule the exam via Pearson VUE and receive a 12-month window to use their voucher after purchase.
What training formats does Koenig offer for Build Reactive Microservices Using Spring WebFlux/Spring Boot?
Koenig offers live online 1-on-1, classroom, self-paced (Flexi), and instructor-led training for this course. All formats feature Guaranteed-to-Run scheduling. This ensures every batch runs as planned regardless of enrollment, providing students with the confidence to book travel or time off well in advance.
How long is lab access provided for Build Reactive Microservices Using Spring WebFlux/Spring Boot?
Koenig provides 30 days of extended cloud-based lab access post-training. These vendor-hosted, real-environment sandboxes are accessible 24/7. They simulate production systems, allowing you to gain secure, hands-on practice with Spring WebFlux, Spring Boot, and reactive microservices components in a professional, risk-free environment.
What is Koenig's rescheduling and cancellation policy for Build Reactive Microservices Using Spring WebFlux/Spring Boot?
Koenig allows free rescheduling with 7 or more days' notice. Cancellations within 7 days typically incur a 50% fee. Training cannot be rescheduled more than once. These policies protect Guaranteed-to-Run batch integrity while offering necessary flexibility for students managing unforeseen professional or personal schedule changes.
What is the format and passing score for the Spring certification exam related to this course?
The Spring Professional Develop (2V0-72.22) exam consists of 60 multiple-choice and multiple-select questions. It has a 130-minute duration and a passing score of 300/500, which is approximately 76%. This proctored exam is delivered via Pearson VUE at authorized test centers or through online proctoring.
How long is the Spring certification valid after completing Build Reactive Microservices Using Spring WebFlux/Spring Boot?
The Spring Certified Professional 2024 certification does not have an expiration date. It does not require renewal. Once earned, the credential remains valid indefinitely. It recognizes your verified expertise in Spring and Spring Boot without the burden of mandatory recertification or recurring maintenance fees.
What post-training support does Koenig provide for Build Reactive Microservices Using Spring WebFlux/Spring Boot?
Koenig offers 30 days of post-training support, including mentor access, recorded session playback, hands-on labs, and exam preparation materials. Learners also receive resume guidance and doubt-clearing sessions. These resources ensure your successful certification and accelerate your career advancement in the competitive IT industry.
What are the prerequisites for Build Reactive Microservices Using Spring WebFlux/Spring Boot?
Learners need practical experience with Java 8+, Spring Framework fundamentals, REST API development, and asynchronous programming. Familiarity with Spring Boot, reactive programming principles, and tools like Project Reactor or MongoDB is strongly recommended. This ensures success in this intermediate-to-advanced level course provided by Koenig.
What is the career impact of mastering Build Reactive Microservices Using Spring WebFlux/Spring Boot?
Professionals with Spring WebFlux skills earn 18–25% more than non-reactive peers. Mid-level engineers average $155,000, while senior roles reach $200,000–$260,000. Expertise in reactive microservices accelerates your progression to senior, staff, or architect roles within high-performance, cloud-native environments, significantly increasing your market value.
How does Koenig's training for Build Reactive Microservices Using Spring WebFlux/Spring Boot compare to self-study?
Structured training from Koenig yields 90% higher course completion and 40% faster job placement than self-study. By providing expert mentorship, official courseware, and Guaranteed-to-Run schedules, Koenig helps you build verifiable skills and professional project portfolios that employers value significantly more than isolated, self-taught learning paths.

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