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Backend/Middleware
- Java (mainly 6, 7, 8, 11 and 17)
- Java distributed computing
- Java enterprise ecosystem
- Java security/encryption
- Spring ecosystem
- DB: MySQL, PostgreSQL, Cassandra
Frontend
- Desktop: Java Swing, Delphi, Win32 C, MFC
- Web: Freemarker, Struts, Velocity
- Client: HTML, CSS, JavaScript, TypeScript, Vue.js, ReactJS, Mustache, Bootstrap etc.
- Scripting: PHP, Perl, bash, BeanShell
Mobile
- Android, native en Flutter (dart)
- IOS, Flutter
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API
- (consume and create) SOAP, XML-RPC, RMI, REST, Custom, SDK, plain socket, Protobuf, binary
Server
- Management of 10+ servers
- CentOS, Debian
- Cloud, Azure
DevOps
- CI/CD
- Git
- Maven
- Azure DevOps
Security
- Middleware/interface (●●●)
- Application layer (●●●)
- Server layer (●●◌)
- Project layer (●●◌)
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