Khandker Mahmudur Rahman

• Contributing to their various Android and iOS development projects targeting state-of-the-art smartphones and Google Glass- based product development and research.
• Gradually taking ownership of different features of their in-house Android Applications.
• Participated in continuous improvement by generating suggestions, engaging in problem-solving activities to support teamwork.
• Improved Android Application's Data Security by implementing Secured Storage (Preference and Database).
• Improved Android Application's Network Security against MITM attacks and other SSL-related vulnerabilities by implementing SSL pinning.
• Responsible for developing the main stream product for iOS platform.

It was short but great journey. Being part of a large team made me more skilled and dynamic in project management. Not to mention the learning of AOSP development, which is a game-changer.

I was given the responsibility of Architect for Android Team E. It was a new team and the role was also more challenging. I was given the responsibility of Architect for Android Team E. It was a new team and the role was also more challenging.

Key accomplishments:

• Lead the team to implement a new Text-to-Text engine
• Designed the new language mapping file to support legacy device
• Designed and integrated new supported languages
• Designed and provided assistance to the developers to develop a custom in-app keyboard.
• Assessed under-performing software and developed actionable improvements.
• Mentored team, sharing skills and expertise and encouraged each member to bring forward ideas and suggestions for improvement.

Joined Div4 (Android team D) as a lead developer remotely during the beginning of the COVID pandemic. It was a challenge for me to prove dedication and passion to the team and I believe I had done excellent there.

Key accomplishments:

• Implemented audio compression algorithm. This feature reduced up to 70% of mobile data cost. The client was really happy and excited with the performance and the cost minimization.
• Managed to resolve critical issues that made some good impact on the product
• Completed code debugging, software troubleshooting, root cause analysis and program reviews.

Key accomplishments:

• VPN Tunneling and VPN server/client application design
• Developed server/client socket application using DTLS protocol
• XMPP (IM) Application development and customizing Secure XMPP library for Android Platform
• Amazon FireTV Stick (android) VPN client application

Responsibilities:

• Do R&D projects to bring new ideas into tables
• Follow Up and review the codes are done by junior team members
• Collaborate with Cross Teams (QA/iOS/Web/Core)
• Manage and Assist team members
• Manage release and deliverables
• Breakdown high level requirements in smaller task

Key accomplishments:

• Ported and modified PJSUA2 C++ library using NDK to support Android application
• Designed and developed VOIP SDK in Java for Android
• Contributed to various custom VOIP Android application developments
• Designed and developed IAX2 client library (protocol layer) for Android platform
• Integrating Firebase Push notification service for both Android client and server-side (using python)
• Ported audio codecs in Android using NDK (Speex, OPUS, GSM, codec2)
• Worked on Customizing POS firmware (DOT NET)

Responsibilities:

• Design and Develop new features/ new solutions
• Develop and customize libraries written in C/C++ for Android Architecture using NDK
• Investigate critical bugs and come up with solutions
• Collaborate with Cross Teams (QA/iOS/Web/Core)

Key accomplishments:

• Programmed firmware for Aviation Grade Custom Hardware (Voice, Data, wireless application, drivers for embedded platform). This includes communicating with Satellite Modems using RS232 protocol, maintaining and managing data connection with clients over WiFi using TCP/UDP protocol.
• Developed thread-safe event-based (epoll/poll/select) client-server applications using socket (TCP/UDP)
• Ported and modified PJSIP C library using NDK to support Android application

Responsibilities:

• Develop firmware for embedded hardware.
• Implement core features in Linux based c/c++ applications
• Work on customizing opensource libraries

Key accomplishments:

• Designed circuit board and developed firmware for RF-ID based production counter
• Designed and developed Electronic Queue Management System.
• Worked with RS232 and RS485 data communication modules.
• Worked on GSM based Generator Monitoring system.
• Worked on developing automated Attendance Management Software.
• Worked on designing an developing Microclimate Device with remote localized weather data logger system. [Wind Speed, Wind Direction, Temperature, Humidity]
• Worked on designing GSM-GPS Tracker with AVR microcontroller.
• Programming Bootloader for Embedded Systems
• Designed and fabricated embedded circuit for controlling 3 phase motor (Nord) with Variable Frequency Driver (VFD) which is used in Dynamic Simulators (Car, Tank).