RxJS Experts in Munich
matched in minutes from over 15,000 CVsHire experts who design reactive front ends, streaming workflows and event-driven services with RxJS, TypeScript and Angular. FRATCH quickly connects you with vetted, available freelancers whose experience fits your technical needs.
Meet FRATCH Experts in Munich, who have recently used RxJS
Tamás E.
Last position:
Senior Software Developer / Tech Lead at NDA (defense / OSINT)
- Designing the audit logging framework
- Implementing APIs for developers to integrate in their codebase
- Implementing ingestion pipeline, database query layer and UI for browsing the audit events
- Improving stability and reliability of the backend system
Srinivasu K.
Last position:
Atruvia
Project: Tax Exemption Order Application
The client has an existing application for creating and maintaining tax exemption orders for end customers; design and implementation of a comparable application for internal employees.
- Design and implementation of microservices and the UI for the business area "tax exemption orders" using Domain Driven Design as well as Spring Boot and Angular.
- Implementation of reactive, non-reactive, and asynchronous APIs (Spring REST, WebFlux, GraphQL).
- Development of the Angular application, including state management using Signals, RxJS Observables, and subscriptions.
- Securing the API and the application using OAuth2, JWT, and OpenID Connect.
- Configuration and setup of CI/CD pipelines with Jenkins.
- Collaboration with cross-functional teams and conducting code reviews.
Environment: Java, Spring Boot, Angular 18 & 19 (standalone, signals), RxJs, Bootstrap CSS, Vitesting, OpenShift, Istio, microservices, Kafka, Dynatrace, Jenkins, GitLab, Graylog, Sonar, Oauth2, OracleDB
David D.
Last position:
Senior Angular Engineer at HUK-Coburg
- Technologies: TypeScript, JavaScript, Java, HTML, SCSS, JSON, REST, Angular, Nx, NgRx, RxJs, Git, Spring, TFS, Jenkins, Jest, Cypress, UI/UX-Design, Figma, Storybook, Domain-Driven Design (DDD), Micro Frontend, Clean Code, Arc42, Agile, Scrum, Jira, Confluence
- Technical conception and further development of a modern Angular web application as part of the portal migration
- Built a modular frontend architecture with Nx and clear separation of domain and technical layers (Clean Architecture)
- Introduced and implemented Domain-Driven Design in the frontend context, including layer model and linting rules for code organization
- Developed reusable UI components and features using Angular, NgRx and RxJS
- Integrated the application with backend services via REST APIs
- Ensured high code quality through structured code reviews, testing with Jest and Cypress and introduction of guidelines
- Performed regular upgrades to new Angular versions to ensure long-term maintainability
- Collaborated closely with internal developers, product owners and stakeholders for requirements analysis and solution finding
- Supported the team through active knowledge transfer, review coaching and technical decision making
- Established a modular architecture with Nx & DDD as the technical foundation for future development
- Significantly improved test coverage through systematic introduction of Cypress and Jest tests
- Facilitated intensive collaboration with internal developers to build DDD structures and testing strategies
- Delivered a modernized UI focusing on clarity, usability and modern web technologies, achieving high acceptance by over 4,000 field staff
- Enabled parallel operation of the new Angular portal with the existing .NET system for phased migration of the sales process
Daniel R.
Last position:
Software Engineer at DB InfraGO AG
- Development of dynamic web components for displaying KPIs, intelligent map applications, and operational process analysis tools
- Angular 18+
- Leaflet, MapLibre
- NestJS, JavaScript, HTML, CSS
- PostgreSQL, GraphQL, RabbitMQ
- Gitea, Jenkins, Docker
Alexander S.
Last position:
Founder and Full-Stack Developer at TrumpPostAlert.com
- Feasibility study for quick implementation of requirements with AI-based development (vibe coding)
- Development of a single-page web app in Angular 20
- Development of a backend server application in Kotlin
- Integration with Google Cloud Platform (Firebase): authentication, Firestore NoSQL database, storage, Cloud Functions, hosting and Cloud Run
- Integration with a NEON PostgreSQL database
- Automated AI-based analysis of Donald Trump's posts on Truth Social and analysis of relevance for stock markets and geopolitical topics
- CI/CD via GitHub Actions using Docker and Google Cloud Run
- Technical environment: Angular 20 (Angular Material, RxJS), Kotlin 2.2.20, TypeScript 5.9.3, Spring Boot 3.5.6, Google Cloud Platform (Firebase, Cloud Run, Gemini, Vertex AI), ChatGPT Codex, Git, GitHub, SourceTree, IntelliJ WebStorm, IntelliJ IDEA
Boris N.
Last position:
Fullstack Developer & DevOps Engineer at EnBW Energie Baden-Württemberg
- Further development of the internal "ECockpit" platform with an Angular 17 frontend and .NET (C#) backend
- Maintenance and further development of Azure DevOps pipelines
- Introduction of technical improvements in build & release processes
- Collaboration on a modular architecture approach (Clean Architecture & DDD)
- Focus on scalability and secure data processing
- Tech stack: Angular 17, .NET / C#, Azure, Azure DevOps, Git, CI/CD, Clean Architecture, Domain Driven Design
Bela B.
Last position:
Full Stack Lead Developer, Backend Architect at Telefonica (O2)
The software supports the complete planning and approval of antennas for mobile telephony.
The system was implemented using an event-driven microservice architecture for cloud-native deployment with Quarkus on the backend, Kafka for communication, and Angular for the frontend. Services run on Kubernetes in Google Cloud. A special challenge was synchronizing with the legacy system still used by some users.
Igor C.
Last position:
Senior Frontend Developer at Freelance Frontend Developer
- Senior Frontend Developer, January 2022 – July 2024: Industry: banking and Deutsche Bahn, large databases; Technology: Angular 18, AngularJS, TypeScript, JavaScript, RxJS, CSS, HTML, Azure, Docker, Git; Company size: 50–55 people
- Senior Frontend Developer, October 2021 – December 2021: Industry: contract management; Technology: Angular 12, Syncfusion, TypeScript, RxJS, CSS, HTML, Docker, Git; Company size: 15–20 people
- Senior Frontend Developer, May 2021 – September 2021: Industry: web, social network; Technology: JavaScript, jQuery, Django, CSS, HTML, Git, Compass; Company size: 15–20 people
- Senior Frontend Developer, January 2021 – April 2021: Industry: web, web applications; Technology: Angular 8, TypeScript, RxJS, Docker, Git, CSS, HTML; Company size: 1–10 people
- Senior Frontend Developer, June 2020 – December 2020: Industry: web, web applications; Technology: JavaScript, Dart, Flutter, Git, CSS, HTML; Company size: 1–10 people
Andreas K.
Last position:
Senior Developer at ioki GmbH, a Deutsche Bahn AG company
- Fullstack development based on Next.js and TypeScript
- Development and optimization of geospatial database queries for PostgreSQL/PostGIS
- Visualization of geospatial data using Mapbox
- Design and execution of load tests and performance optimizations
- Code reviews and documentation tasks
- Technologies: JavaScript, TypeScript, Next.js, React, Zod, tRPC, Storybooks, PostgreSQL/PostGIS, MicroORM, Knex, Material UI, Mapbox, BullMQ, Jest, Playwright, Artillery.io, K6, Sentry, Figma, GitLab, Grafana, GTFS
René W.
Last position:
Development of an AI-supported system for lead generation
As part of an in-house development project, a pipeline for automated lead generation was created as the second stage of a preceding system for project monitoring. Based on a list of freelance project URLs (freelancermap), qualified lead records are generated, including company, contact person, official and personal email address, and the appropriate form of address (informal/formal). The technologies used were Python (openpyxl, requests) as well as an LLM agent workflow in VS Code (GitHub Copilot Chat) with a custom slash command and extensive rule set; search APIs (Serper.dev) are connected for research. My tasks included the full concept and development. The core is a rule set of around 480 lines that guides the LLM agent deterministically through extraction, website and email lookup, duplicate matching (against existing provider lists), and the creation of a structured JSON output. Deterministic steps (Excel matching, web/email search, pattern derivation) were moved into Python helper scripts. Other requirements included validating the results through versioned blind runs against a reference, iterative refinement of the rule set, and a swappable search provider layer for cost and stability reasons.
Discover over 15,000 top freelancers
Statistics of experts using RxJS
Aggregated from the professional profiles of matched freelancers.
Experience
20 years (Germany: 19 years)
Position duration
1.4 years (Germany: 1.7 years)
Positions per freelancer
15
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Banking and Finance, Telecommunication
Certification focus areas
Information Technology, Business Intelligence
Bachelor's degree or higher
86% (Germany: 87%)
Master's degree or higher
57% (Germany: 27%)
Doctorate
29% (Germany: 8%)
Certifications per freelancer
0 (Germany: 2)
Most common languages
German, English, Hungarian
Speak two or more languages
100% (Germany: 99%)
Based on our profile pool as of 19 Sep 2026.
Daily rate distribution
The chart shows how the daily rates of freelancers in this technology in Munich are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows how many freelancers charge within that range.
Average rates of experts in Munich using RxJS
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.
Calculated based on our freelancers’ daily rates as of 19 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
RxJS experts industry focus
See which industries our matched freelancers work in most often — every figure is calculated live from the freelancers on FRATCH.
- Information Technology (90%)
- Banking and Finance (70%)
- Telecommunication (70%)
- Automotive (60%)
- Manufacturing (50%)
- Retail (50%)
- Education (40%)
- Insurance (40%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Reactive foundations
RxJS, short for Reactive Extensions for JavaScript, is a library for composing asynchronous and event-based programs with observable sequences. It lets teams represent user input, HTTP responses, WebSocket messages and other changing values as streams. Operators transform, combine and control those streams in a consistent way.
What it builds
RxJS is used where many events must be coordinated without fragile callback chains. Common deliverables include:
- Search fields with debouncing, cancellation and live results
- Real-time dashboards and notification interfaces
- WebSocket and server-sent event pipelines
- Multi-step workflows with retries and error handling
- Reactive state and data synchronization layers
Ecosystem and tooling
Strong RxJS work usually sits within a wider TypeScript ecosystem. Angular uses observables throughout its APIs, while NgRx and related state libraries apply reactive patterns to larger applications. Professionals also work with Jest or similar test tools, browser performance tooling, ESLint rules and marble testing to inspect timing-sensitive behavior.
When expertise matters
Companies bring in freelance RxJS specialists when asynchronous behavior has become difficult to reason about or when an application must handle frequent updates reliably. Typical signals include duplicated subscriptions, memory leaks, race conditions, unclear ownership of state or operators that are hard to test. In Munich, remote collaboration is common, while some teams need on-site workshops or German-language communication.
Beyond basic operators
Knowing map, filter and switchMap is only a starting point. Experienced professionals choose operators based on concurrency, cancellation and failure behavior, and they make subscription lifecycles explicit. They understand when a stream should be shared, replayed or completed, and when a simpler promise or imperative function is the better choice.
Assessing delivery quality
Review how a specialist explains stream ownership, error paths and teardown behavior. Practical quality shows in small, focused pipelines, meaningful names, controlled side effects and tests that cover timing and cancellation. Ask for examples involving Angular, TypeScript or WebSocket data, then check whether the approach remains understandable as the feature grows.
Frequently asked questions
Questions about RxJS? Start with the answers below.
RxJS is used to model asynchronous and event-driven work as observable streams. It is common in Angular interfaces, live search, WebSocket features, notifications, dashboards and workflows that combine several data sources.
RxJS handles streams of values over time, while a Promise normally represents one eventual result. Observables can support cancellation, composition and controlled concurrency, but a Promise is often clearer for a single asynchronous operation with no ongoing event flow.
Reactive Extensions for JavaScript work is strongest alongside TypeScript, Angular or another event-driven framework, HTTP APIs and browser debugging. Depending on the project, useful adjacent skills include NgRx, WebSockets, Jest, marble testing and state management design.
RxJS expertise should match the complexity of the data flow rather than a fixed time period. A small feature may need solid operator and subscription knowledge, while a large application benefits from someone who can shape reactive architecture, testing strategy and migration plans.
RxJS work is well suited to remote collaboration because pipelines, tests and performance findings can be reviewed in shared repositories and technical sessions. On-site workshops in Munich can still help when a team needs to align on state ownership, event contracts or a wider frontend migration.
RxJS quality is visible in explicit subscription lifecycles, clear operator choices and tests for cancellation, timing and errors. Ask a specialist to explain why a stream is shared, replayed or completed, and look for solutions that avoid hidden side effects and unnecessary nesting.
ReactiveX patterns may add complexity when a feature has one simple asynchronous result or only a few local state changes. A Promise, signal or ordinary function can be easier to maintain when there is no meaningful stream of events to compose.
RxJS specialists should clarify the framework version, existing operator conventions, state boundaries, error policies and subscription ownership. They should also ask which streams are long-lived, how real-time data is delivered and whether the team expects remote delivery, on-site sessions or German-language communication.
The average hourly rate of freelancers in Munich, Germany who have used RxJS in their recent projects is 87 €, which corresponds to a daily rate of about 695 € based on an 8-hour working day.
Of the freelancers in Munich, Germany who have used RxJS in their recent projects, 86% hold at least a Bachelor's degree, 57% hold at least a Master's degree, and 29% hold a doctorate.
On average, freelancers in Munich, Germany who have used RxJS in their recent projects have 20 years of professional experience, with a single engagement typically lasting around 1.4 years.
The most common languages among freelancers in Munich, Germany who have used RxJS in their recent projects are German (100%), English (90%), and Hungarian (20%).
The most common industries among freelancers in Munich, Germany who have used RxJS in their recent projects are Information Technology (90%), Banking and Finance (70%), and Telecommunication (70%).
The most common business areas among freelancers in Munich, Germany who have used RxJS in their recent projects are Information Technology (100%), Product Development (100%), and Project Management (50%).
Main locations of FRATCH Experts, who have recently used RxJS
Our freelancers and interim experts are at home across the DACH region — available on-site in the major business hubs or fully remote. Choose a location to discover matched specialists, local market insights and up-to-date availability.
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