Bilal Sammour
Verified Expert in Engineering
Flutter, Android, and Xamarin Mobile Developer
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
Experience
- Android - 15 years
- Deployment - 15 years
- Mobile Development - 15 years
- Architecture - 10 years
- Flutter - 6 years
- Dart - 5 years
- React Native - 3 years
- CTO - 2 years
Availability
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
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.
Solution Architect
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.
Senior Developer
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.
Engineering Leader for Mobile Team
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.
CTO | Senior Mobile Engineer
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.
Senior Flutter Mobile Software Engineer
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.
Senior Mobile Software Engineer
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.
Senior Android Developer
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.
Senior Mobile Software Engineer
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.
Experience
Reddit (via Toptal)
https://play.google.com/store/apps/details?id=com.reddit.frontpageThe 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.appThroughout 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.comI 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
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.comThe 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
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
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
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.comDuring 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
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://www.smartchargetech.com/iotah/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
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.comIn 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
Education
Bachelor's Degree in Computer Science
University of Jordan - Amman, Jordan
Certifications
Social Marketing Certification
Talal Abu-Ghazaleh Information Technology International (TAG-ITI)
Leadership and Teamwork Building
Talal Abu-Ghazaleh Information Technology International (TAG-ITI)
Skills
Libraries/APIs
AWS Amplify, REST APIs, Stripe, Node.js
Tools
Git, Jira, GitHub, Android NDK
Languages
Java, Dart, Kotlin, C#, JavaScript, C#.NET, Arabic, TypeScript
Frameworks
Flutter, React Native, .NET, Android SDK, .NET MAUI
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, Fintech, Internet of Things (IoT), Platforms, Performance
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