AJAX Expert in Berlin
for responsive web interfaces, matched in minutes with vetted specialistsHire experts who improve browser-based applications with asynchronous requests, JavaScript event handling and API integration. Work with vetted, available freelancers who can modernize legacy interfaces or support new web products through fast, precise matching.
Meet FRATCH Experts in Berlin, who have recently used AJAX
Toralf C.
Last position:
IT Consultant in PKI Software Development at BWI
- Implementation of a full-stack application with Angular as frontend framework and Java as backend language
- Use of the Swagger OpenAPI specification for REST communication between frontend and backend applications
- Control of a card printer via the Nexus Card SDK framework
- Design and implementation of card management software with web interface and JavaFX module for printer monitoring
- Use of Cucumber tests for test automation and creation of test artifacts for testing outside the development environment
- Use of Wireshark for network investigations to analyze the API of a third-party product and to check the REST API of the self-developed software
Ola V.
Last position:
IT Lecturer
- IT training in theory and practice for IT specialists in application development and system integration
Benjamin F.
Last position:
Freelance Product Manager, Product Owner, Scrum Master & Agile Coach at Freelance
Freelance product owner, scrum master and agile coach in various projects spanning from local agencies to multinational corporations in diverse industries.
Last projects:
Adevinta: Technical Project Manager responsible for coordination of several sub-workstreams building the world’s largest classifieds multi-tenant platform.
Aroundhome (a ProSiebenSat.1 company): Product Manager implementing and verifying on the business side a concept for digital qualification of user requests for matching service providers.
Peek & Cloppenburg Düsseldorf: Product Manager Mobile advising on and guiding the rebuild of Android and iOS apps.
Visual Meta GmbH (an Axel Springer company), Berlin: Director Product co-leading the Product & Engineering department together with the Director Engineering.
Responsibilities at Visual Meta GmbH:
Define and deliver a 3–5 year horizon product strategy including a product vision & mission connecting to existing company strategy and strategies from adjacent departments.
Refine an existing OKR process together with OKR master and directors of other departments to increase focus and outcome.
Support the Director Engineering in creating a platform transformation strategy to transform a monolithic on-premise tech stack into a service-oriented, cloud-based architecture and establish a domain-based organizational setup.
Accountability for a motivated and talented team of 5 head-level colleagues and 17 operational team members from product management, data and UX/UI design.
Key achievements at Visual Meta GmbH:
Defined and delivered a 3–5 year horizon product strategy including a product vision & mission.
Increased focus within OKR process by moving from 10 company-level objectives to 2 and from several hundred team-level key results to a few dozen.
Created a career path framework for the product team defining roles and responsibilities from junior to head level positions.
Vamsi K.
Last position:
Full Stack .NET Developer at Neusta GmbH
- Implemented and maintained logistics-domain applications using Angular, C#, ASP.NET, HTML5, CSS3, JavaScript, AJAX and Bootstrap
- Analyzed, designed, coded and deployed backend services and integrations using .NET, XML Web Services and RESTful APIs
- Developed automated SSIS packages and scheduled ETL jobs to support data workflows
- Built and maintained Python scripts for automation and prototyping; applied Cursor AI to build/refactor full-stack AI/ML model integrations
- Implemented unit and integration testing (NUnit) and conducted performance tuning for backend services
- Managed source control and CI/CD using GitHub, Azure CI/CD pipelines and TeamCity
Alberto G.
Last position:
C#/.Net Developer at Pean-IT GmbH
- Developed high-performance REST API interfaces in C# for Investitionsbank Berlin (IBB) using CI/CD (Git, Azure DevOps).
- Developed the "Pean Admin Center" using the Microsoft Graph API (backend: C#, frontend: Vuetify), implemented via CI/CD pipelines (Azure DevOps).
- Created low-code business applications and automated processes with Power Apps and Power Automate.
- Set up and designed the online shop for Pestalozzi-Fröbel-Haus (PFH) via Wix.
Syed A.
Last position:
Senior Web Developer at TU Dresden
- Contributed significantly to enhancing the university’s digital presence through modern WordPress development, performance optimization, and scalable deployment strategies.
- Designed and maintained robust CI/CD pipelines, streamlining deployments across local, staging, and production environments.
- Executed A/B tests on key landing pages, resulting in measurable improvements in user engagement and campaign performance.
- Integrated Google Tag Manager, Google Analytics, and custom tracking solutions to drive data-informed design and content decisions.
- Leveraged AI tools like ChatGPT through advanced prompt engineering to streamline development tasks, debug complex issues, and automate content optimization for SEO and documentation.
Igor K.
Last position:
Freelance Software Developer
Discover over 15,000 top freelancers
Statistics of experts using AJAX
Aggregated from the professional profiles of matched freelancers.
Experience
22 years (Germany: 23 years)
Position duration
2.5 years (Germany: 2.6 years)
Positions per freelancer
15 (Germany: 16)
Top business areas
Information Technology, Product Development, Project Management
Top industries
Information Technology, Education, Media and Entertainment
Certification focus areas
Product Development, Project Management, Information Technology
Bachelor's degree or higher
100% (Germany: 85%)
Master's degree or higher
75% (Germany: 51%)
Certifications per freelancer
1 (Germany: 2)
Most common languages
German, English, Spanish
Speak two or more languages
86% (Germany: 98%)
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 AJAX
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.
AJAX 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%)
- Education (57%)
- Media and Entertainment (57%)
- Retail (57%)
- Automotive (43%)
- Banking and Finance (43%)
- Healthcare (43%)
- Telecommunication (43%)
Please note that freelancers can work across multiple industries, so percentages overlap.
About the technology
What AJAX does
AJAX, short for Asynchronous JavaScript and XML, lets a web page exchange data with a server without a full reload. In practice, modern AJAX solutions usually send and receive JSON through browser APIs while JavaScript updates only the relevant interface elements. This creates faster, more responsive experiences for forms, search, filters, dashboards and customer portals.
Where it fits
AJAX is a browser-side technique rather than a standalone framework. Specialists use Fetch API or XMLHttpRequest with JavaScript, HTML and CSS, then connect the interface to REST or GraphQL services. Strong work also considers promises, async and await, HTTP behavior, authentication, caching, error handling and accessibility.
- Live search and filtering
- Partial updates in account areas
- Form submission without page reloads
- Notifications, validation and progress states
Typical project work
Companies bring in AJAX experts to improve an existing interface, connect a frontend to backend services or replace brittle scripts in a mature web application. They may deliver reusable request utilities, state updates, loading and error states, test coverage and clear integration documentation. In Berlin, this work often supports digital products, commerce operations and internal business tools that need dependable browser interactions.
When specialists help
Freelance expertise is useful when a page feels slow, requests behave inconsistently or a legacy jQuery implementation is difficult to maintain. It also helps when a team is moving from full-page navigation to a richer interface without committing to a large frontend rewrite. Specialists can review request flows, identify race conditions and create a focused modernization plan.
- Diagnose duplicate or out-of-order requests
- Secure data exchange and session handling
- Improve perceived loading performance
- Make dynamic content accessible
AJAX and modern alternatives
AJAX remains relevant inside server-rendered sites, progressive web interfaces and established applications. Fetch API is the current browser interface for many requests, while libraries and frameworks can add routing, caching or state management around it. The right choice depends on the product, browser support, backend design and the amount of client-side behavior required.
What strong professionals deliver
A capable AJAX professional separates presentation, request logic and data handling instead of scattering callbacks through page scripts. They understand browser events, network failures, request cancellation, security boundaries and efficient DOM updates. They test slow responses and interrupted connections, communicate trade-offs clearly and can collaborate remotely or on site with Berlin teams in the working language the project requires.
Frequently asked questions
Not sure where to start with AJAX? These answers cover the essentials.
AJAX is used to exchange data with a server while keeping the current page visible. It supports live search, inline editing, validation, dashboards, filters and other interactions that should not trigger a full page reload.
AJAX updates selected parts of an interface instead of replacing the whole document. This can make interactions feel faster, but it also requires careful handling of loading states, browser history, errors and accessibility.
AJAX describes the asynchronous communication pattern, not only one browser API. XMLHttpRequest is the older mechanism commonly associated with the term, while Fetch API offers a more modern interface for sending requests and receiving responses.
AJAX work usually involves JavaScript, HTML, CSS and browser event handling. Useful adjacent skills include REST or GraphQL integration, JSON, authentication, HTTP, accessibility, testing and familiarity with frameworks or server-rendered applications.
AJAX expertise should match the system’s complexity rather than a fixed time measure. A small form enhancement may need focused browser and API skills, while a large interface requires experience with concurrency, state, security, testing and legacy code.
AJAX projects are often well suited to remote collaboration because code, browser traces and API behavior can be reviewed online. On-site work in Berlin can still help when specialists must pair with a product team, investigate a local setup or coordinate closely during a sensitive release.
AJAX quality is visible in reliable request flows, clear error handling and interfaces that remain usable during slow or failed responses. Ask for examples of performance diagnosis, testing, accessibility decisions and work with APIs or legacy browser code.
AJAX specialists are a strong fit when a targeted improvement can solve the problem without replacing a stable application. They can modernize XMLHttpRequest or jQuery code, introduce Fetch API where appropriate and advise whether a broader frontend change is justified.
The average hourly rate of freelancers in Berlin, Germany who have used AJAX in their recent projects is 85 €, which corresponds to a daily rate of about 679 € based on an 8-hour working day.
Of the freelancers in Berlin, Germany who have used AJAX in their recent projects, 100% hold at least a Bachelor's degree and 75% hold at least a Master's degree.
On average, freelancers in Berlin, Germany who have used AJAX in their recent projects have 22 years of professional experience, with a single engagement typically lasting around 2.5 years.
The most common languages among freelancers in Berlin, Germany who have used AJAX in their recent projects are German (100%), English (86%), and Spanish (14%).
The most common industries among freelancers in Berlin, Germany who have used AJAX in their recent projects are Information Technology (100%), Education (57%), and Media and Entertainment (57%).
The most common business areas among freelancers in Berlin, Germany who have used AJAX in their recent projects are Information Technology (100%), Product Development (86%), and Project Management (86%).
Main locations of FRATCH Experts, who have recently used AJAX
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.
Berlin 
Hamburg Munich Cologne Frankfurt Stuttgart Dusseldorf Leipzig Dortmund Essen Bremen Dresden Hanover Nuremberg 
Munich 
Cologne 
Frankfurt 
Dusseldorf Countries:
Request a free demo
Get in touch with the FRATCH team and we will get back to you within 4 hours.
Would you rather directly get in touch?
We always have the time for a call or email!
Philipp Thomaschewski
FRATCH CEO
