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Angular RxJS: Observables, Operators & Subjects Intermediate

Reactive Programming with Angular RxJS by Koenig Original equips intermediate Angular developers with advanced skills to manage asynchronous data streams using RxJS, solving the pain point of complex state management and unresponsive UIs. With 97% of modern web apps leveraging reactive patterns, this course enables developers to build scalable, real-time applications through hands-on labs and expert instruction.

This training prepares learners for advanced Angular development roles with Koenig’s Guaranteed-to-Run scheduling and 30-day lab access. Graduates gain proficiency in observables, operators, and error handling, enabling them to design responsive applications and accelerate career growth in high-demand front-end engineering positions.

32 Hours (4 Days)
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Course Overview

Reactive Programming with Angular RxJS by Koenig Original is a specialized course designed for web developers, Angular developers, and full-stack engineers who aim to master asynchronous programming using observable streams in modern web applications. This course prepares learners for advanced Angular development, focusing on the RxJS library, a core component of Angular's reactivity model. With Angular being cited in 78% of job postings requiring reactive programming skills and enterprises increasingly adopting reactive architectures, proficiency in RxJS has become essential. The curriculum is tailored for professionals targeting roles such as Frontend Developer, Software Engineer, and Full-Stack Engineer, where demand for Angular expertise remains strong across enterprise sectors including finance, healthcare, and system integration.

The course provides hands-on experience with key technologies including Angular, RxJS Observables, RxJS Operators (such as map, filter, switchMap, debounceTime, and combineLatest), and standalone components in modern Angular architecture. Students engage in practical labs using a simulated Angular development environment where they build a reactive search dashboard from scratch. During these labs, participants configure reactive forms, manage asynchronous data streams, optimize API calls using debouncing and throttling, and handle multiple concurrent events using RxJS combinators like combineLatest and merge. These exercises are conducted in a browser-based IDE setup that mirrors real-world development workflows, enabling learners to apply reactive patterns in scalable, production-grade applications.

By completing the Reactive Programming with Angular RxJS course, participants are equipped with skills directly aligned with industry demands, positioning them for career advancement in high-paying roles with a median salary of $165,000 for Angular-focused positions. The course prepares developers for modern Angular development certifications and reinforces best practices in state management, performance optimization, and responsive UI design. As a Koenig Original, this training features a Guaranteed-to-Run schedule and access to official e-courseware, ensuring structured, instructor-led learning. Graduates gain a competitive edge in the job market, ready to contribute to enterprise-scale applications and lead the development of dynamic, real-time web solutions.

What You'll Learn

✓Implement reactive data streams using Angular 17+ RxJS to handle race conditions and build dynamic, real-time applications.
✓Configure Observables and Subjects for asynchronous programming in Angular, utilizing pipe and subscribe to manage data flow.
✓Manage application state efficiently by integrating Signals vs Observables in Angular projects to reduce bugs and enhance responsiveness.
✓Combine multiple data streams using switchMap and mergeMap operators to build robust, scalable Angular architectures.
✓Handle errors effectively using catchError and retry operators in RxJS-based Angular projects to ensure application stability.
✓Optimize Angular performance by applying advanced RxJS patterns to minimize memory leaks and improve overall application scalability.

Prerequisites

Recommended knowledge before taking this course
  • Minimum 6 months of active Angular development experience
  • Solid proficiency in TypeScript 4.x+ to develop reactive Angular applications
  • Strong understanding of Angular 14+ fundamentals such as components, services, and modules
  • Knowledge of asynchronous programming concepts like Promises and Observables used in Angular RxJS
  • Experience with JavaScript ES6+ features including arrow functions, destructuring, and modules
  • Familiarity with core RxJS concepts such as Observables, Subjects, and Operators
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Certification Exam

Everything you need to know about the Angular RxJS: Observables, Operators & Subjects certification exam

Exam Details
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Format
Multiple choice, labs & case studies
Questions
Duration
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Course Curriculum

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

1
Day 1– Mastering Reactive Programming with Angular RxJS
Grasp reactive programming paradigm fundamentals Learn Koenig Original RxJS and observables Create and subscribe to data observables Define observers and manage active subscriptions Implement multicasting using RxJS Subjects Execute error handling in observable streams Review essential RxJS creation functions Lab: Build functional reactive observables
2
Day 2– RxJS Operators and Data Transformation
Master core RxJS operator functionality Apply map, filter, and tap operators Transform data with switchMap, mergeMap Combine operators for efficient data flow Handle errors using catchError operators Implement retry mechanisms via retry operator Follow standard observable naming conventions Lab: Transform complex HTTP data streams
3
Day 3– Advanced Observables and State Management
Use BehaviorSubject for state management Apply ReplaySubject and AsyncSubject patterns Design efficient stateless observable services Configure local versus global service scope Manage secure authentication state with RxJS Cache data streams using shareReplay Optimize change detection with OnPush Lab: Implement robust shared data services
4
Day 4– Reactive Patterns in Angular Framework
Utilize Async pipe in component templates Build reactive forms with observable patterns Track router events as observable streams Manage EventEmitter and component communication Implement responsive type-ahead search suggestions Apply exponential backoff for retry logic Master-detail pattern with stream caching Lab: Build reactive search component features
5
Day 5– Real-World Reactive Application Development
Combine multiple complex data streams Enable decoupled communication using services Create loading indicators in reactive style Manage error messages with observable state Implement seamless optimistic UI updates Apply single data observable design patterns Refactor imperative code to reactive style Lab: Deploy full reactive application project

What's Included in Your Training

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

Career Outcomes

78%

of Angular RxJS: Observables, Operators & Subjects certified professionals report career advancement within 6 months

Salary Impact

+22%

Average salary increase reported after obtaining the Angular RxJS: Observables, Operators & Subjects 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

5
  • Angular Developer
  • Frontend Engineer
  • RxJS Specialist
  • Reactive Web Developer
  • Angular Application Engineer

Companies Hiring

5,000+
Google Microsoft Accenture Deloitte Infosys TCS JPMorgan Chase Capgemini IBM

and 5,000+ organizations worldwide seeking Angular RxJS: Observables, Operators & Subjects certified professionals

Real Transformations

Course Student Reviews

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.”

    Rahul M.

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

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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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    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

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  • ★★★★★

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    James T.

    James T.

    Head of L&D, UK Enterprise

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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.”

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    Security Analyst

    SC-300 Certified ✓ Verified
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    David L.

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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.”

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    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.

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    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
  • ★★★★★

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Frequently Asked Questions

Everything you need to know about the Angular RxJS: Observables, Operators & Subjects training course

Is the certification exam included in the Reactive Programming with Angular RxJS course fee, and what is the cost if separate?
The certification exam is not included in the Reactive Programming with Angular RxJS course fee. You must purchase it as an optional add-on. Koenig Solutions lists exam vouchers separately. While exact pricing varies, similar Angular certifications typically range from $100 to $200. Contact our team for a precise quote.
What training formats are available for Reactive Programming with Angular RxJS, and does Koenig offer Guaranteed-to-Run scheduling?
Koenig offers Reactive Programming with Angular RxJS in live online, 1-on-1, classroom, and Flexi self-paced formats. All options feature Guaranteed-to-Run (GTR) scheduling. GTR ensures your chosen batch proceeds regardless of enrollment numbers. This provides you with the confidence to plan your professional development schedule without fear of sudden cancellations.
How long is lab access provided, and what type of lab environment is used for this course?
You receive 30 days of post-course access to cloud-based sandbox environments. These hands-on labs, available as an optional add-on for INR 4,159 (+GST), simulate real-world development. They allow you to master RxJS observables, complex operators, and reactive data flow management through practical, guided exercises in a professional setup.
What is Koenig's rescheduling and cancellation policy for this course?
Request free rescheduling more than 10 days before your start date. Changes or cancellations within 10 days incur a 50% fee of the total purchase price. You may reschedule a session only once. Please submit written notice to ensure administrative compliance with our standard Terms of Service and booking policies.
What is the format, duration, number of questions, and passing score for the Reactive Programming with Angular RxJS certification exam?
While specific exam details for this Koenig Original course vary, industry-standard Angular/RxJS certifications typically feature 40–60 scenario-based questions. Expect a 60–90 minute duration and a 70% passing score. As an authorized provider, Koenig aligns all assessments with current industry benchmarks to ensure your certification accurately validates your reactive programming expertise.
How long is the Reactive Programming with Angular RxJS certification valid, and what is the renewal process?
This Koenig Original certification is valid for life. No renewal fees or mandatory continuing education credits are required. This provides a permanent credential that demonstrates your mastery of advanced RxJS patterns and reactive data management, offering long-term value for your professional portfolio without recurring administrative burdens.
What post-training support does Koenig provide after completing the Reactive Programming with Angular RxJS course?
After training, you gain 30 days of extended lab access, session recordings, and 6 hours of free trainer consultation. You also receive official courseware, practice test questions, and a certificate of completion. This support structure ensures you retain key skills and receive expert guidance while implementing reactive patterns in your workplace.
What prerequisites or prior experience are recommended before taking the Reactive Programming with Angular RxJS course?
We recommend intermediate-level experience with Angular and TypeScript. A foundational grasp of asynchronous programming is vital. Familiarity with basic RxJS observables helps you succeed. This course is designed to advance your ability to manage complex data streams, making prior front-end development experience a key requirement for achieving maximum learning outcomes.
What career benefits or salary impact can I expect after completing the Reactive Programming with Angular RxJS course?
This course boosts employability for Angular Developer and Front-End Engineer roles, where RxJS expertise often commands a 15–20% salary premium. Certified professionals in India earn ₹8–15 LPA, while US salaries range from $90,000–$130,000. Mastering these reactive programming skills directly aligns your profile with the high market demand for modern web application developers.
How does instructor-led training compare to self-study for mastering Reactive Programming with Angular RxJS?
Instructor-led training provides real-time doubt resolution and expert feedback, improving retention compared to self-study. Koenig’s live sessions cover complex topics like observable chaining interactively, reducing your total learning time by up to 40%. Self-study often lacks this personalized guidance, which can lead to significant knowledge gaps when working with advanced reactive patterns.

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