I am a software engineer with eight years of professional software development experience across Japan and Bangladesh, including work with Rakuten Inc. and Hitachi, and other prominent companies. I specialize in software architecture and engineering, with hands-on experience across embedded systems, Android, and RESTful API development using .NET, Spring Boot, Finagle/Finatra, and web development with ASP.NET, Azure Cognitive Services, Google Cloud Platform, C, C#, Java, and Scala. Beyond full-time roles, I have taken on freelance and independent projects, shaping architecture decisions and building prototypes, such as ANAS and resume-tailoring platform prototypes for Job Coach Japan. I love turning complex requirements into scalable backend systems and robust cloud deployments.

Khaled Bin Al Wadud Bin Haider

I am a software engineer with eight years of professional software development experience across Japan and Bangladesh, including work with Rakuten Inc. and Hitachi, and other prominent companies. I specialize in software architecture and engineering, with hands-on experience across embedded systems, Android, and RESTful API development using .NET, Spring Boot, Finagle/Finatra, and web development with ASP.NET, Azure Cognitive Services, Google Cloud Platform, C, C#, Java, and Scala. Beyond full-time roles, I have taken on freelance and independent projects, shaping architecture decisions and building prototypes, such as ANAS and resume-tailoring platform prototypes for Job Coach Japan. I love turning complex requirements into scalable backend systems and robust cloud deployments.

Available to hire

I am a software engineer with eight years of professional software development experience across Japan and Bangladesh, including work with Rakuten Inc. and Hitachi, and other prominent companies. I specialize in software architecture and engineering, with hands-on experience across embedded systems, Android, and RESTful API development using .NET, Spring Boot, Finagle/Finatra, and web development with ASP.NET, Azure Cognitive Services, Google Cloud Platform, C, C#, Java, and Scala.

Beyond full-time roles, I have taken on freelance and independent projects, shaping architecture decisions and building prototypes, such as ANAS and resume-tailoring platform prototypes for Job Coach Japan. I love turning complex requirements into scalable backend systems and robust cloud deployments.

See more

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
See more

Language

English
Advanced
Japanese
Intermediate

Work Experience

Software Architect at Job Coach Japan
April 1, 2025 - October 30, 2025
Provide technical consultancy focusing on software architecture; lead prototyping for a groundbreaking resume tailoring platform; responsible for early-stage conceptualization and foundational architectural decisions.
Architect / Backend Developer at ANAS (Accessible Networked Appointment System)
April 1, 2023 - October 30, 2025
Independently designed and developed ANAS, an open API platform to streamline multi-party scheduling, initially for doctor appointments; architected core backend services using Scala (Play Framework); integrated with Google Cloud Platform CloudSQL for scalable data management; oversaw end-to-end lifecycle including frontend integration and deployment.
Software Engineer at Rakuten Payment (Japan)
November 1, 2024 - October 30, 2025
Role secured but did not commence due to Japanese immigration visa complexities.
Software Engineer at Rakuten Point Partner
December 1, 2023 - December 1, 2023
Handled vendor-side point system and promotions for Rakuten Card; developed automation tools for the operations team; created backend services and APIs.
Software Engineer at Rakuten Analytics Team (RAT)
April 30, 2023 - April 30, 2023
Architectural design (connectivity and APIs) and development of backend services for a powerful Business Analytics Tool; CI/CD pipeline development; led the Query Builder Project; connected frontend to GCP data servers and implemented complex query translation to BigQuery; API development and test analysis.
Software Engineer at LinkStaff Co., Ltd.
June 30, 2019 - June 30, 2019
Shanai Microservice System: API structures, API gateway design, and microservice development using RESTful-API; Frontend/Backend integration; Android team leadership.
Software Engineer at LinkStaff Co., Ltd.
April 30, 2022 - April 30, 2022
CI/CD System: Architected and implemented continuous integration and deployment infrastructure for in-house development.
Team Lead - Android App Development at LinkStaff Co., Ltd.
April 30, 2022 - April 30, 2022
Led a team of 7 Android developers; UI/UX development of the Android application using Adobe XD.
Software Developer at TotalsTel Pvt. Ltd.
September 30, 2017 - September 30, 2017
Automated Attendance and Surveillance System prototype for Chittagong Port Authority; facial recognition and biometric integration; IoT meter data visualization.
Embedded System Developer at CIDT.BD
October 31, 2016 - October 31, 2016
Smart Street Lamp project; digital circuit design; AVR microcontroller programming; power source management.

Education

B.Sc. in Computer Science and Engineering at Daffodil International University
January 11, 2030 - January 1, 2015
Diploma in Engineering, Major: Computer Technology at Chittagong Polytechnic Institute
January 11, 2030 - January 1, 2011

Qualifications

Bangladesh Japan IT Engineer Training (B-JET)
November 1, 2017 - March 1, 2018

Industry Experience

Software & Internet, Computers & Electronics, Professional Services