09/22/2026 updated

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Senior Mendix Developer | Advanced Certified | Scrum Master

Amsterdam, Netherlands
Worldwide
Bachelor of Electronics and Communication Engineering, Tishreen University, Latakia (2008-2014)
Amsterdam, Netherlands
Worldwide
Bachelor of Electronics and Communication Engineering, Tishreen University, Latakia (2008-2014)

Profile attachments

2026_09_22_Yamen Khalifa.pdf

About me

I consider myself a studious professional who is curious about everything new in science and technology. Others see me as a quick learner with high self-motivation. I am determined to carry out professional tasks in an accurate manner while being sensitive to the broader context of the task.

Tailwind CSSRESTful API Modeling LanguageC (Programming Language)HTMLJava (Programming Language)Extensible HyperText Markup Language (XHTML)XML SchemaXMLSpyHTML5Microsoft AzureC++ (Programming Language)Cascading Style Sheets (CSS)Dynamic HTMLElectronic Business Using EXtensible Markup Language (EbXML)Embedded RDF (XML-Based Standards)HTML Abstraction Markup LanguageCharacter Encodings in HTMLHTML EditorForm (HTML)Problem SolvingJava Development KitJava AppletJava ArchitecturesJava Database ConnectivityJava Development ToolsJSONJava API For RESTful Web Services (JAX-RS)Java Architecture for XML BindingJava Business Process ManagementPython (Programming Language)PostgreSQLMessaging Application Programming InterfaceProject Management SoftwareMySQLObject-Oriented JavaScriptProject Management Information SystemsScrum MethodologyJSON Web TokenMendixSemantic HTMLSimple Object Access Protocol (SOAP)Xml SitemapsSoapUISOAP with AttachmentsSystems IntegrationTime ManagementExtensible Markup Language (XML)XML-RPCXml TechnologiesAnalysis of Business ProcessesJava Application ServerCertified Scrum MasterMysql DatabasesXml FilesSalesforce Object Query Language (SOQL)Xml PublisherMysql5Restful Api
Mendix Development
Advanced Certified Mendix Developer with 5+ years of experience building Progressive Web Apps, Native Mobile Apps, and enterprise-grade applications using the full Mendix platform including Microflows, Nanoflows, OData services, Java actions, and domain model design.

API Integration & Web Services
Extensive experience integrating REST (JSON), SOAP (xml), and OData services into Mendix applications, including Peppol integration for electronic invoicing and Google Translation API integration with custom glossaries.

Database & Query Languages
Proficient in PostgreSQL, MySQL, and OQL for data modeling, complex querying, data migration, and performance optimization including archiving modules handling millions of objects.

Scrum & Agile Project Management
Certified Scrum Master (PSM-1, Scrum.org) with hands-on experience working in multiple Agile environments, collaborating with Product Owners and cross-functional teams to deliver business-centric applications.

Frontend Technologies
Knowledge of HTML, CSS, SCSS, Java, and JavaScript for building responsive and user-friendly front-end solutions within Mendix and beyond.

Cloud & Azure Fundamentals
Certified in AZ-900 Microsoft Azure Fundamentals (2024), with experience working on cloud-based and on-premise governmental and enterprise applications.

Security & Authorization Frameworks
Development of custom role-based security and authorization frameworks, enabling granular permissions for data, pages, features, and business processes within enterprise applications.

Performance Optimization & Refactoring
Focus on application performance including responsiveness, load times, memory efficiency, and refactoring existing codebases to improve scalability and maintainability.

AI & Automation Integration
Incorporation of AI as an external service to intelligently generate application objects by scraping websites, PDFs, and images, enhancing data automation and scalability.

Python & C/C++
Basic knowledge of Python (currently learning) and C/C++ as part of the broader development stack.

Experience

Professional experience5 - 10 years
Freelancer since2026

Languages

ArabicNative speakerEnglishFluentDutchBasic knowledgeSpanishBasic knowledge

Project history

Mendix Developer

RentVisie
Working on a Progressive Web App integrated with high-code systems via REST APIs. Designing responsive Mendix front ends and configuring bidirectional data exchange with existing enterprise applications. Designing scalable Mendix modules for diverse rental asset types, implementing Peppol integration, developing a custom role-based security framework, implementing a subscription-based model, and building a configurable feature framework for SaaS rental operations.

Technical Administrator and Management (Voluntary Work)

Meevaart
Responsible for all technical devices in the center including computers, laptops, routers, switches, networks, TVs, sound systems, and programming key cards for doors. Also teaching new employees to use computers (Windows, Office, internet basics, e-mailing).

Mendix Consultant (Native and Web application)

WelcomeApp!
Designing, building, and maintaining high-performance Android, iOS, and Progressive Web Applications. Integrating Google Translation API with custom glossary for multilingual capabilities, incorporating AI as an external service for data automation, and improving overall app performance focusing on responsiveness, load times, and memory efficiency. Also played an active role in hiring and building the development team.

Mendix Consultant

Blue Green Solutions
Obtained Advanced Mendix certification and contributed as a valuable member of many teams solving various problems. Main projects included WelcomeApp! (new features for municipality announcements, push-notifications, and security/access rights), European Central Bank project ATLAS (cloud-based on-prem governmental finance applications with digital workflows around policies and regulation), Openclaims (cloud-based distribution applications with dynamic rule-based distribution), BOSS (cloud-based finance applications for payment processing and invoicing with high-performance archiving module), Urban Solutions (noise modeling and mitigation platform with API-based monitor data and map visualizations), and Blue Tracks (internal administration application for financial records, invoicing, reimbursements, and more).

Mendix Developer Accelerator Program

Motopp
Trained to use the full Mendix platform and build Mendix apps from scratch. Close collaboration with the Product Owner to finalize requirements and convert them into working business/user-centric applications. Participated in several Mendix courses and lectures covering PWA, domain model design, Microflows, Nanoflows, pages and navigation, XPath constraints, data aggregation, scheduled events, connectors, OData services, Java actions, application security, validation, performance tuning, version control, environments and deployments, REST (JSON), and SOAP (xml).

Manager and Accountant

3D Zone Cinema
Responsible for setting up movies, checking the schedule, managing the cinema crew, and calculating all financial information.

Certificates

AZ-900: Microsoft Azure Fundamentals

Microsoft

2023

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