Bilal Sammour, Developer in Amman, Amman Governorate, Jordan
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Bilal Sammour

Verified Expert  in Engineering

Flutter, Android, and Xamarin Mobile Developer

Location
Amman, Amman Governorate, Jordan
Toptal Member Since
May 19, 2021

Bilal is a top 3% seasoned mobile and desktop app engineer with 15 years of experience and numerous international awards. He excels in Flutter, React Native, Android, and Xamarin and has developed over 10 high-quality apps. Bilal has managed many teams and contributed significantly to startups, organizations, and leading companies. He is recognized as a top-notch app developer and a valuable asset for organizations seeking exceptional proficiency.

Portfolio

PepsiCo Global - PepsiCo IT Services
Xamarin, Architecture, Platforms, Performance, Azure, Web Architecture...
Daniel Palmer
Xamarin, C#, Firebase, Architecture, Flutter, Android, iOS, Stripe, Dart...
Wibl AS
Flutter, iOS, Android, Agile, Architecture, Code Review, Dart...

Experience

Availability

Part-time

Preferred Environment

Flutter, Android, Engineering Software, Java, Kotlin, Dart, React Native, JavaScript

The most amazing...

...thing I've done is mentoring 50+ professionals and becoming a company partner for a top startup.

Work Experience

Software Architect

2023 - PRESENT
PepsiCo Global - PepsiCo IT Services
  • Orchestrated the design of a high-tech mobile app for 50 million users, focusing on scalability and user-friendly design.
  • Analyzed and revamped a complex app with thousands of screens, crafting key components for improved user experience.
  • Guided the smooth transition from Xamarin to .NET MAUI, boosting app performance and staying ahead of tech trends.
  • Upgraded 80+ packages to align with .NET MAUI, ensuring a strong and adaptable tech foundation.
  • Played a key role in delivering a top-notch mobile app for the leading organization by combining smart architecture, detailed analysis, and proactive package management.
Technologies: Xamarin, Architecture, Platforms, Performance, Azure, Web Architecture, Full-stack, Agile, C#, C#.NET, iOS, Engineering Software, Code Review, Deployment, Git, Mobile Development, Xamarin.Forms, Mobile Apps, Cross-platform App Development, Leadership, Apps, .NET MAUI, Cross-platform, Mobile Applications, APIs

Solution Architect

2022 - 2023
Daniel Palmer
  • Designed and implemented a Flutter-based app that sells eSIMs aligned with their plans from international telecom providers.
  • Decreased the budget by 50% when I advised the CEO to use Firebase, which saved the cost of the custom back end and enhanced the performance of the solution.
  • Headed the whole development process and guided the designer to deliver a modern Material 3 design.
  • Overcame the absence of SDKs for the Flutter platform by implementing the Stripe component, enabling the app to be integrated with Google and Apple Pay.
  • Configured the CI/CD for the project and used it to publish the apps automatically.
  • Tracked and reported the app's purchase transactions, screen views, events, and errors using Firebase Analytics.
  • Interviewed candidates and recommended the best talent for the project, which led to expanding the team.
Technologies: Xamarin, C#, Firebase, Architecture, Flutter, Android, iOS, Stripe, Dart, Software Architecture, JavaScript, Mobile Apps, Full-stack, Cross-platform App Development, Mobile Applications, Leadership, GitHub, Android SDK, Amazon Web Services (AWS), Apps, Node.js, Google Cloud Platform (GCP), Cross-platform, Agile, Code Review, Team Leadership, APIs, Startups, Engineering Software, Deployment, Git, Mobile Development

Senior Developer

2022 - 2022
Wibl AS
  • Implemented a well-structured and maintainable codebase for a Flutter-based app that helps find the best restaurant intelligently.
  • Analyzed the competitor apps and offered a collection of ideas to the CTO, transforming them into features and launching them.
  • Identified and architected the structure of the back end for 15+ separated features.
  • Managed the mobile app, including the design, back-end structure, and business logic.
  • Focused on the finer details inside the app, such as LTR and RTL support, accessibility support, and fallback for each feature.
  • Coached the internal team and trained them to be successful engineers by moving them to the next level.
Technologies: Flutter, iOS, Android, Agile, Architecture, Code Review, Dart, Software Architecture, Jira, REST APIs, Mobile Apps, JavaScript, Full-stack, Cross-platform App Development, Mobile Applications, Leadership, GitHub, Android SDK, Apps, Google Cloud Platform (GCP), Cross-platform, Team Leadership, APIs, Startups, Engineering Software, Deployment, Git, Mobile Development

Engineering Leader for Mobile Team

2021 - 2021
ApnaKlub
  • Administrated the mobile team, mentored the team members, and guided them to be international quality-oriented software engineers.
  • Revamped the old React Native project and then headed and architected the new Flutter-based project.
  • Structured the APIs and configured the CI/CD for the project.
Technologies: Flutter, Dart, Android, iOS, Firebase, Deployment, Code Review, Architecture, Agile, Leadership, Engineering Software, Java, Git, Mobile Development, Software Architecture, Jira, React Native, REST APIs, Mobile Apps, Cross-platform App Development, Mobile Applications, TypeScript, GitHub, Android SDK, Amazon Web Services (AWS), Apps, Google Cloud Platform (GCP), Cross-platform, Team Leadership, APIs, Startups

CTO | Senior Mobile Engineer

2021 - 2021
My Life-Timeline
  • Chaired the technical, business, and marketing operations to be the CTO for the Instagram-like app.
  • Revamped a rejected old app to the next level of a high-quality Flutter-based app five times faster than the old one.
  • Analyzed the competitor apps and proposed various ideas to the CEO. Then, I transformed the ideas into features that made the app from a USA-based only app to an international app.
  • Developed, structured, and deployed a Flutter-based app with the BaaS back end using Firebase.
  • Submitted maintainable, high-quality, and well-structured code.
Technologies: Flutter, iOS, CTO, Agile, Architecture, Engineering Software, Code Review, Java, Dart, Git, Firebase, Mobile Development, Software Architecture, Jira, Android, AWS Amplify, REST APIs, Mobile Apps, Full-stack, Cross-platform App Development, Mobile Applications, VoIP, Leadership, GitHub, Android SDK, Amazon Web Services (AWS), Apps, LiveStream, Video Livestreaming, Google Cloud Platform (GCP), Cross-platform, Team Leadership, APIs, Startups, Deployment, Arabic

Senior Flutter Mobile Software Engineer

2020 - 2021
Cloud Solutions
  • Mentored mobile team on Flutter virtual hospital app development.
  • Developed dynamic forms for non-tech users, cutting development time by 30%.
  • Introduced and implemented a WebRTC video call plugin and published the project as an open-source contribution.
  • Engineered the architecture and developed most of the shared components still used in the project.
  • Designed and engineered 15+ back-end APIs that are used in the app and the web front end as well.
Technologies: Flutter, Android, iOS, Engineering Software, Dart, Java, Kotlin, Deployment, Code Review, Leadership, Git, Architecture, Firebase, Mobile Development, REST APIs, Software Architecture, Agile, Jira, Mobile Apps, Cross-platform App Development, Mobile Applications, VoIP, GitHub, Android SDK, Apps, Google Cloud Platform (GCP), .NET MAUI, Cross-platform, Team Leadership, APIs, Startups, Healthcare, Arabic

Senior Mobile Software Engineer

2017 - 2020
Smart Charging Technologies
  • Developed cross-platform IoT apps for interaction with smart hardware using Xamarin, Universal Windows Platform (UWP), and Windows Presentation Foundation (WPF).
  • Devised and implemented a cross-platform template that accelerated the IoT solutions production to five days/IoT app.
  • Managed a team of four developers and two QA experts.
  • Revamped a large legacy code project to a clean and maintainable project that improved the development four times.
Technologies: Xamarin, Android, iOS, Agile, Engineering Software, C#, Java, Kotlin, Deployment, Git, Leadership, Architecture, Firebase, Mobile Development, REST APIs, Software Architecture, Xamarin.Forms, .NET, Code Review, Jira, Internet of Things (IoT), Universal Windows Platform (UWP), Mobile Apps, Desktop App Development, Full-stack, Cross-platform App Development, Mobile Applications, GitHub, Android SDK, Android NDK, Apps, Cross-platform, Team Leadership, APIs, Startups, C#.NET, Arabic

Senior Android Developer

2015 - 2016
Jamalon
  • Developed an Android eBook reader app for the largest MENA online bookseller.
  • Clarified an Adobe undocumented SDK and enhanced it to be a maintainable and readable SDK.
  • Coached the mobile team members and trained them to be successful engineers by moving them to the next level.
  • Collaborated with outsourced engineers from different time zones.
Technologies: Android, Java, Code Review, Deployment, Agile, Git, Architecture, REST APIs, Software Architecture, Engineering Software, Mobile Development, Jira, Flutter, Mobile Apps, Mobile Applications, Leadership, GitHub, Android SDK, Apps, Team Leadership, APIs, Startups, Arabic

Senior Mobile Software Engineer

2012 - 2015
Startappz — N2V
  • Developed an award-winning app that was featured in the Google Play Store.
  • Partnered with leading clients in MENA, including Microsoft, the Saudi government, the UAE government, Mobily, and Etisalat Group.
  • Succeeded to implement and launch the urgent Android app of Saudi Ministry of Health (MoH) 937 in just three days.
  • Implemented, executed, and directed 5+ Android, iOS, Windows, and UWP apps in government, healthcare, utilities, and telecommunications industries.
Technologies: Android, Universal Windows Platform (UWP), Java, C#, Deployment, Agile, Git, Leadership, Architecture, Mobile Development, REST APIs, Software Architecture, .NET, Engineering Software, Jira, JavaScript, Mobile Apps, Desktop App Development, Full-stack, Cross-platform App Development, Mobile Applications, VoIP, GitHub, Android SDK, Android NDK, Apps, LiveStream, Video Livestreaming, Cross-platform, Code Review, Team Leadership, APIs, Startups, Healthcare, C#.NET, FlutterFlow, Arabic

Reddit (via Toptal)

https://play.google.com/store/apps/details?id=com.reddit.frontpage
Reddit is an Android social network app where people come together to have the most authentic and exciting internet conversations.

The app has reached an impressive milestone of over 100 million users and has garnered a fantastic 4.0 rating from around 2.7 million reviewers on Google Play. It's owned by the renowned Reddit company, which holds the 20th spot as the most-visited website globally and the 6th most-visited in the US. With revenue exceeding $700 million, it's evident that the app has made a significant impact.

Overcoming the complexity of the large codebase was no easy feat, but I managed to analyze and master it myself. As a native Android developer proficient in Android SDK, Kotlin, and Java, I used my skills to enhance the app's functionality and user experience. It was a rewarding experience, and I'm proud to have made the app successful.

SIMPal | eSIMs Marketplace App

https://sim-pal.app
As part of my responsibilities, I contributed to developing an eSIM sales app that seamlessly integrates with plans offered by international telecom providers and the app was built using Flutter, with Firebase for the back end (BaaS).

Throughout the project, I took charge of the app's implementation, and one particular achievement is a source of great pride. By advising the CEO to adopt Firebase, I reduced the project budget by an impressive 50%. This strategic decision enabled us to leverage Firebase's robust features while significantly optimizing costs. I am pleased to have made a valuable contribution that ensured the app's functionality and delivered substantial savings for the organization.

ApnaKlub (Enterprise)

https://apnaklub.com
ApnaKlub (Flutter) empowers its partners in semi-urban and rural areas by providing organized supply and digital tools so that they can build an efficient micro-business catering to the needs of shopkeepers and large families around them.

I managed the mobile team and undertook the responsibility of effectively leading and guiding the team towards becoming internationally recognized, quality-oriented software engineers.

Wibl | Tripadvisor Restaurant App

An enterprise Flutter-based app for a company from Norway that allows people to connect with and discover local restaurants. The app changes how users dine, acting as a digital menu and marketplace for finding restaurants.

I implemented the app, analyzed the competitors, designed the back end, and coached the internal team.

My Life TimeLine | Instagram-like App

https://mylife-timeline.com
As the CTO and Flutter developer of a Texas-based social media platform, I aimed to create an uncensored space for users to share their life stories. I took on the challenge of revamping an old app into a high-quality Flutter-based platform powered by Firebase for the BaaS.

The new app is five times faster and offers a vastly improved user experience.

During the project, I was able to reduce the development budget by an impressive 50%. One of my proudest moments was being recognized as the CTO by the client within just a month. I also took the app to an international level and developed a large-scale app with no back end (BaaS).

FinSwiss | PayPal Competitor Web App

An international payments platform based in Zürich aims to empower global merchants to operate seamlessly across borders by bringing international payments to the next level.

The client is an intermediary financial member of SO-FIT under the Swiss Federal Act on Combating Money Laundering and Terrorist Financing.

I administrated the front-end team and configured the CI/CD during the project. I was proud to deliver a cross-platform, cross-device solution that works on web, mobile, Windows, macOS, and Linux operating systems.

I am also pleased to have been chosen to act as the front-end team lead and the architect a week after starting the project.

dePL | GeoAds App

A yellow-page app for companies in the USA that shows detailed information about a particular company. It also has a map indicating the companies within a certain distance that can be changed by the user, aligned with the user's location.

The client is a startup dedicated to providing technical solutions to clients in different industries.

I implemented the app and, most importantly, decreased the development budget by 50%.

Mentor | Tesla Tracker App

As a mentor on a Flutter-based mobile app, I helped the team improve its quality by tackling various challenges and implementing difficult features.

Specifically, I guided the team in implementing live location and background job functionalities, real-time notifications, user authentication, and custom animations. Through my guidance and support, the team successfully integrated these features into the app, resulting in an overall improvement in functionality and user experience.

Hiki | Dating App

https://www.hikiapp.com
I developed an app to facilitate social connections for individuals with autism spectrum disorder (ASD), enabling them to foster platonic and romantic relationships. The app was built using the React Native framework and is available on Android and iOS devices.

During my involvement in the project, I provided guidance and mentorship to the mobile development team, assisting them in resolving technical issues within the app. Additionally, I worked closely with the client to ensure the app met their needs and goals, enabling them to move forward to the next stage of development.

HMG App | Virtual Hospital

A virtual medical Flutter-based app allows users to talk to a professionally licensed doctor. The app was built for Dr. Sulaiman Al-Habib Medical Group (HMG), the largest medical group in Saudi Arabia.

While structuring the project, I had a chance to manage and mentor a mobile team. I was most proud of creating the dynamic forms solution that reduced the development effort by 30%.

Switch Always On | IoT App

https://smartchargetech.com/switch-always-on
I worked on a smart IoT DC micro-power supply (UPS) designed to provide uninterrupted power and connectivity for networking devices. The Xamarin-based app for Android, iOS, and Windows Presentation Foundation directly connects to the UPS hardware via socket technology.

The client, Smart Charging Technologies (SCT), is a high-tech firm focused on developing innovative IoT energy management and equipment solutions for the industrial transportation industry.

During the project, I implemented the app and structured the APIs. I was proud to deliver the Android, iOS, and Windows apps.

Sharq

A native Android app that enables users to stay up-to-date with the latest news by customizing and personalizing their news feed from all news sources worldwide.

I implemented the app and guided the project, as well. I was incredibly proud of delivering the Android, iOS, and Windows apps.

ePay-like App

https://www.invy.com
Using Flutter, I developed a cross-platform app for Android and iOS users. The app utilizes Firebase as its back end and incorporates advanced AI functionalities.

In my role, I overhauled an existing app, meticulously designing and implementing its architecture. I effectively transformed high-level requirements into a fully functional application, allowing the client to concentrate on the product and delight in its superior quality.

Legal Recorder App

This is an Android call recorder app that has overcome previous hurdles and brought immense satisfaction to the client. After several unsuccessful attempts by earlier developers, I took up the challenge and successfully implemented the app, utilizing innovative workarounds. Developed in Kotlin and Java, this Android application incorporates the powerful functionalities of the Google Cloud console.
2005 - 2009

Bachelor's Degree in Computer Science

University of Jordan - Amman, Jordan

NOVEMBER 2016 - PRESENT

Social Marketing Certification

Talal Abu-Ghazaleh Information Technology International (TAG-ITI)

AUGUST 2016 - PRESENT

Leadership and Teamwork Building

Talal Abu-Ghazaleh Information Technology International (TAG-ITI)

Libraries/APIs

AWS Amplify, REST APIs, Stripe, Node.js

Tools

Git, Jira, GitHub, Android NDK

Frameworks

Flutter, React Native, .NET, Android SDK, .NET MAUI

Languages

Java, Dart, Kotlin, C#, JavaScript, C#.NET, Arabic, TypeScript

Paradigms

Mobile Development, Desktop App Development, Cross-platform, Agile, Web Architecture

Platforms

Android, Xamarin, Universal Windows Platform (UWP), Firebase, Amazon Web Services (AWS), Google Cloud Platform (GCP), FlutterFlow, iOS, Xano, Azure

Industry Expertise

Healthcare

Other

Engineering Software, Code Review, Deployment, Architecture, Software Architecture, Xamarin.Forms, CTO, Mobile Apps, Full-stack, Cross-platform App Development, VoIP, Leadership, Apps, LiveStream, Mobile Applications, Video Livestreaming, Team Leadership, APIs, Startups, Internet of Things (IoT), Platforms, Performance

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