Hazem Mostafa

Led the development of Limehome's React Native app from scratch for iOS and Android, defining architecture, tooling, and core engineering practices. Migrated and adapted existing web flows and systems to mobile, ensuring feature parity while optimizing for mobile UX and performance. Took a technical leadership role within the mobile initiative, guiding implementation, reviewing code, and aligning closely with product and backend teams.

Senior React Native Engineer at Limehome GmbH (2023-01 – Present)

• Led the development of Limehome's React Native app from scratch for iOS and Android, defining architecture, tooling, and core engineering practices.
• Migrated and adapted existing web flows and systems to mobile, ensuring feature parity while optimizing for mobile UX and performance.
• Took a technical leadership role within the mobile initiative, guiding implementation, reviewing code, and aligning closely with product and backend teams.
• Set up a robust automated testing foundation, including unit and end-to-end (E2E) tests, to support reliable releases and long-term maintainability.

Senior React Native Engineer at Chatterbug (2021-10 – 2022-11)

• Worked with a team of engineers on releasing new features and executing the company's strategy in a fast-changing environment.
• Integrated Banuba video editor to create a YouTube-style shorts feature.
• Helped build group video sessions using OpenTok.
• Implemented a user experience points system to drive engagement and support learning goals.

Senior React Native Engineer at Raisin GmbH (2020-02 – 2021-09)

• First mobile engineer to join the Raisin mobile team.
• Set up the foundation of the mobile project codebase.
• Released the first version of the Raisin app with biometric login, KYC, dark mode, video identification, and translation support.
• Migrated the project from ES6 to TypeScript and added unit test coverage using Jest and Enzyme.

React Native Engineer at Hatch Apps (2019-04 – 2019-12)

• Collaborated with a team of developers to build customer React Native apps powered by AWS Amplify.
• Contributed to a cross-platform React Native component library.
• Participated in code reviews and pair programming to improve engineering practices.

React Native Engineer at 360DRC Marketing (2018-02 – 2019-04)

• Developed React Native UI components and application logic for customer loyalty apps (iOS & Android).
• Integrated backend APIs and collaborated with server-side engineers to define new endpoints.
• Worked closely with product managers to define requirements and milestones.

Android & Web Developer at NAMAA Solutions (2016-04 – 2018-01)

• Native Android development.
• Backend development using PHP (Laravel) and MySQL.
• Designed and built RESTful APIs.
• Created a multi-tenant SaaS school management system using Laravel and Angular.

Bachelor of Software Engineering in Software Engineering – University of Kalamoon (2011-09 – 2015-05)