RxJS Experts in Berlin
matched to your needs and ready to startHire experts who design reactive data flows, manage asynchronous state and integrate RxJS with Angular, TypeScript and web APIs. FRATCH finds the right vetted, available freelancer through fast, precise AI matching.
Meet FRATCH Experts in Berlin, who have recently used RxJS
Aruldass A.
Last position:
Web Module Lead at Mphasis Limited
- Led the end-to-end delivery of enterprise full-stack web applications by driving requirement analysis, solution design, frontend and backend development, database design, API integration, code reviews, team coordination, Agile execution, CI/CD deployments, production support, performance optimization, security implementation, and stakeholder collaboration to deliver scalable, high-quality software solutions.
Ibrahim H.
Last position:
Senior Full Stack / AI Engineer at Punktum Digital GmbH
- Context: Healthcare and laboratory teams required faster document analysis, treatment-planning support, and reliable AI workflows for MR/VR-assisted operations.
- Contribution: Built the AI healthcare platform, model/agent workflows, VR-glasses deployment platform, REST APIs, Next.js/React interfaces, and CI/CD pipelines.
- Impact: Delivered a production-ready AI product foundation that improved clinical document review, supported laboratory automation, and made VR fleet deployment manageable across environments.
Tech: TypeScript, Next.js, Node.js, React, Java, Spring Boot, Python, PyTorch, TensorFlow, Docker, PostgreSQL, OpenAPI, GitLab, GitHub Actions.
Julien L.
Last position:
MLOps Engineer at SAMGEN
- Building and scaling cloud infrastructure on GCP to support a SaaS platform for industrial clients
- Designing and implementing a data-driven DevOps pipeline for streamlined deployment and CI/CD workflows
- Collaborating with Data Science team on MLOps workflow to automate integrated retraining
Gregor D.
Last position:
Founder, Principal Software Architect & Technical Consultant at Hold My Code GmbH
- Frontend modernization (multiple client engagements): Angular version upgrades, architecture refactoring, performance optimization, state management restructuring, and UI library consolidation resulting in faster load times and improved end-user experience across all projects.
- Web development: High-performance landing pages and company websites for SMB clients built with Next.js, SvelteKit, PayloadCMS, and TailwindCSS optimized for speed, SEO, and conversion.
- SaaS product development: Architecting and building an AI-powered platform for photography studio operators (PoC phase) with full-stack TypeScript: Angular frontend, NestJS backend, PostgreSQL, LLM integration (Gemini/Claude) for intelligent workflow automation.
- AI integration: Developed a PoC for AI-generated podcast avatars using the Gemini API for content production workflows.
- Angular deep dive workshops: Delivered 20+ workshops (3–5 days each, 8–10 participants) in a hands-on format where participants build a demo application modeled after their real business domain.
Olaf N.
Last position:
Frontend Engineer at Danaher/Hach Lange GmbH
- Developed a SolidJS frontend UI for a spectrometric water analysis system on an ARM-based embedded Linux platform
- Prototyped UI in TypeScript React/Nx with LitElements and MQTT integration
- Built production UI using SolidJS, SUID, i18next, Ajv, MQTT.js, C3.js
- Refined requirements with UX team and water analysis system engineers
- Defined and documented system architecture, MQTT message formats, frontend architecture, and development setup
- Set up frontend system from scratch, implemented domain-oriented type system, UI components, and application state
- Managed MQTT pub/sub services and schema-based message validation in frontend
- Coached two junior frontend developers
- Worked in an agile remote team using JIRA, Git, and Bitbucket
Konrad A.
Last position:
Senior Software Developer at Project Holi / Holistic Foundation
Working on our inhouse React-Native based platform / ecosystem of tools and integrations (GoodNews, BetterPlace etc.) for social sharing, donations, ethic news and organisation of initiatives centered around charity work.
- React Native + Web (Typescript)
- Webpack
Konstantin K.
Last position:
.NET Senior Full-stack Software Developer at DINA Elektronik GmbH
- Tech-Stack: C#, XAML, WPF, MongoDB, Azure Cloud, Azure DevOps, Resharper, Rider, OAuth2.0, REST, XUnit, NSubstitute, FluentAssertions
- Designed and implemented the IO architecture for improved data flow and efficiency.
- Developed a new desktop application from scratch, improving user experience and functionality.
- Led the implementation of daily stand-ups, software refinements, retrospectives, and project planning.
- Wrote unit and integration tests to ensure code quality and stability.
- Conducted code reviews and mentored junior developers.
- Played a key role in the company's digitalization efforts.
- Managed a team of 4 software developers, providing leadership and direction.
Michael W.
Last position:
TUI AG / Robinson
- Development of an Internet Booking Engine IBE (Saber and Juniper) and other microservices
- Backend development with PHP and Symfony, endpoint and interface implementation
- Unit and integration testing
Discover over 15,000 top freelancers
Statistics of experts using RxJS
Aggregated from the professional profiles of matched freelancers.
Experience
18 years (Germany: 19 years)
Position duration
2.3 years (Germany: 1.7 years)
Positions per freelancer
12 (Germany: 15)
Top business areas
Information Technology, Product Development, Operations
Top industries
Information Technology, Manufacturing, Retail
Certification focus areas
Information Technology, Product Development, Project Management
Bachelor's degree or higher
83% (Germany: 87%)
Certifications per freelancer
2
Most common languages
German, English, Japanese
Speak two or more languages
100% (Germany: 99%)
Based on our profile pool as of 29 Oct 2026.
Daily rate distribution
The chart shows how the daily rates of experts in this technology in Berlin are distributed, based on recent contracts on our platform. Each bar covers a rate range — its height shows the share of experts charging within that range.
Average rates of experts in Berlin 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 29 Oct 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 (100%)
- Manufacturing (88%)
- Retail (63%)
- Energy (50%)
- Healthcare (50%)
- Media and Entertainment (50%)
- Government and Administration (50%)
- Automotive (38%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
Reactive foundations
RxJS is a JavaScript and TypeScript library for composing asynchronous and event-based programs with Observables. It represents values over time, so applications can react to user input, HTTP responses, WebSocket messages and other changing data through consistent pipelines.
What teams build
RxJS is widely used in Angular applications, real-time dashboards, complex forms and interfaces with many concurrent events. It helps teams coordinate streams without scattering callbacks and state changes across the codebase.
- Search, filter and autocomplete flows
- Live notifications and messaging interfaces
- WebSocket and server-sent event handling
- Retry, cancellation and request orchestration
Ecosystem and tooling
Strong work with RxJS includes TypeScript, Angular, JavaScript modules and browser APIs. Specialists use operators such as map, switchMap, mergeMap, combineLatest and catchError, while testing often involves marble diagrams, RxJS TestScheduler and Jest or similar tools.
When expertise matters
Companies bring in freelance expertise when streams have become difficult to trace, subscriptions leak or asynchronous behavior produces inconsistent screens. Support is also valuable during an Angular migration, a real-time feature rollout or a refactor from ad hoc callbacks to explicit reactive flows.
- Simplify nested subscriptions and operator chains
- Define clear state and event boundaries
- Diagnose race conditions and memory leaks
- Improve test coverage for time-dependent behavior
What strong specialists deliver
Experienced professionals choose operators for clear reasons rather than treating RxJS as a collection of shortcuts. They understand cold and hot Observables, multicasting, schedulers, subscription lifecycles and error propagation, then document the flow so other teams can maintain it.
Collaboration in Berlin
RxJS work can be delivered remotely or alongside a product team in Berlin. The key requirements are shared conventions for state, testing and code review, plus clear communication in English or the team’s working language. A focused specialist should connect stream design to the product’s performance, reliability and user experience goals.
Frequently asked questions
Key details about RxJS, drawn from the questions we get asked most.
RxJS is used to manage asynchronous and event-based data with Observable streams. Typical applications include Angular interfaces, autocomplete, live updates, WebSockets, notifications and workflows that need cancellation, retries or coordinated requests.
RxJS can represent multiple values over time and provides operators for combining, transforming and cancelling streams. Promises are often simpler for one asynchronous result, while RxJS is better suited to ongoing events and workflows with several dependent sources.
A strong RxJS specialist usually works confidently with TypeScript, JavaScript, Angular, browser APIs and HTTP clients. Useful adjacent skills include state management, WebSockets, Jest, marble testing, performance analysis and frontend architecture.
The requirement depends on the stream complexity, not on a fixed duration of experience. A small form or request flow may need solid TypeScript and Angular skills, while a real-time product benefits from someone who has handled multicasting, cancellation, testing and subscription lifecycles in production.
Yes. RxJS projects are well suited to remote collaboration when the team maintains clear contracts, code review practices and documentation for stream behavior. Berlin-based teams may choose remote or on-site work depending on workshops, release coordination and language expectations.
Bring in an RxJS freelancer when asynchronous logic is hard to debug, subscriptions leak, screens show stale data or operator chains have become difficult to change. Specialist support can also reduce risk during an Angular upgrade or the introduction of live data.
Review whether the RxJS design has clear stream boundaries, deliberate operator choices and predictable error handling. Good work includes focused tests for timing and cancellation, safe subscription lifecycles, readable naming and an explanation of why the chosen model fits the product.
A typical RxJS engagement may deliver refactored Observable pipelines, reactive state flows, WebSocket integration, test coverage or guidance for an Angular codebase. It should also leave clear documentation and conventions that help the existing team extend the implementation safely.
The average hourly rate of freelancers in Berlin, Germany who have used RxJS in their recent projects is 75 €, which corresponds to a daily rate of about 600 € based on an 8-hour working day.
Of the freelancers in Berlin, Germany who have used RxJS in their recent projects, 83% hold at least a Bachelor's degree.
On average, freelancers in Berlin, Germany who have used RxJS in their recent projects have 18 years of professional experience, with a single engagement typically lasting around 2.3 years.
The most common languages among freelancers in Berlin, Germany who have used RxJS in their recent projects are German (100%), English (100%), and Japanese (25%).
The most common industries among freelancers in Berlin, Germany who have used RxJS in their recent projects are Information Technology (100%), Manufacturing (88%), and Retail (63%).
The most common business areas among freelancers in Berlin, Germany who have used RxJS in their recent projects are Information Technology (100%), Product Development (100%), and Operations (63%).
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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