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$ whoami --short
Zawadul Kawum
Senior Backend Engineer · 11+ years, since 2015 · Jatrabari, Dhaka, Bangladesh
Open to exciting opportunities · Now: Software Engineer IV, Techzu Ichicode Pte Ltd
50M+Toffee app downloads
1M+Payment transactions a day
53Developers led
10K+Pharmacy clients served
Core stack
- LanguagesPHP, Java, C#, Python, JavaScript, Kotlin
- BackendLaravel, Spring Boot, ASP.NET, Node.js, CakePHP
- DataMySQL, PostgreSQL, MongoDB, Redis, SQL Server, Oracle
- Real time and infrastructureKafka, WebRTC, Socket.io, Docker, Kubernetes, Google Cloud, AWS, Active Directory
- Frontend and mobileVue.js, Angular, Android, Ionic, Flutter
- AIVision AI, OCR, Speech Recognition, Face Recognition, OpenCV, Whisper, ONNX Runtime, Claude Code
Key systems
- Face recognition attendanceMarks attendance by recognising faces on camera.
- TZone temperature gateway systemMy own system, with no vendor software, that decodes raw gateway data into exact records in MongoDB.
- Kubernetes orchestrationRuns streaming and payment platforms in production.