Freelancer profile translated to English.
Back to original languageAbout Karim
Freelance Mobile & Frontend Developer | React/React Native Specialist
9 years of experience | Web Agencies | Startups | Public Sector
Key Skills
- Frameworks: React.js (TypeScript), React Native (TypeScript).
- Tools: Jest/Cypress, ESLint/Biome, MobX/Redux, ECharts/AntV, WAI-ARIA.
- Methods: Agile (Scrum/Kanban), CI/CD, Automated Testing, Digital Accessibility.
- Platforms: iOS / Android.
Technical Expertise
- Scalable Mobile Development: Robust architecture for cross-platform applications (React Native), optimized for performance and maintainability.
- Testing & Security: 40% bug reduction via Jest/Cypress + ESLint/Biome standards, WAI-ARIA compliant accessibility audits.
- Cross-Functional Leadership: Coordination with UX/UI, Data & DevOps teams for deliveries aligned with business needs.
- CI/CD Mastery: Pipeline automation for smooth and secure deployments.
Added Value
- Digital Accessibility: Integration of WAI-ARIA standards in sensitive public projects (e.g., Ministry of Sports).
- Cross-Platform Innovation: React Native expert for high-performance hybrid apps on iOS/Android.
- Adaptability: Smooth transition between startup projects (agility) and public sector (strict standards).
French
Native or bilingual
English
Fluent
Can work on-site
Paris (up to 50km)
Experience
- OODA - Obvious technologiesLead Mobile DeveloperSOFTWARE PUBLISHINGMarch 2025 - Today (1 year and 3 months)Nanterre, France
- Lead a distributed team of 4 developers, coordinating between France, Austria, and Thailand to deliver a high-performance and scalable mobile/web application.
- Facilitate regular cross-team meetings (frontend, backend, QA, product, UX/UI, DEVOPS) to align priorities, resolve blockers, and ensure on-time delivery.
- Promote continuous improvement of code quality: implement automated tests (unit, integration), apply code review standards, and perform performance profiling to reduce loading times.
- Write and maintain the company's development standards document (architecture guidelines, coding conventions, CI/CD pipelines, security best practices).
- Mentor and train junior developers, organizing pair-programming sessions, knowledge-sharing workshops, and code review training to elevate overall skill level.
- Update to new tool versions.
- Société GénéraleMobile Developer (React-native)BANKING AND INSURANCEOctober 2023 - February 2025 (1 year and 4 months)Fontenay-sous-Bois, FranceAs part of this assignment, I participated in the development of new features and the maintenance of the mobile application, covering both consumer and business versions.My responsibilities included consolidating codebases, fixing bugs, improving performance, and adding new features.I also worked on extending the application's support to other platforms,including smartwatches and tablets, ensuring a consistent user experience across different devices.
- DGFIPWeb & Mobile Lead/Dev (React/React Native/Typescript)PUBLIC SECTORApril 2023 - September 2023 (5 months)Montreuil, France
- Complete technical restructuring of the project, focusing on improvement, optimization, and ease of maintenance.
- Implementation of development standards compliant with industry standards.
- Implementation of new features to meet specific project needs.
Technical stack: React, React-native (upgrade from 0.67 to 0.71, Firebase (notification), Gitlab, e2e tests with Detox, unit tests jest with React-testing-library, Zustand, Redux, css)
Recommendations
Be the first to recommend Karim
Help this freelancer shine by sharing your experience working together.
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- Master of EngineeringEFREI - French School of Electronic and Computer Engineering2017Master of Engineering - MEng, Computer Software Engineering
- Bachelor's Degree, Management Information SystemsMoroccan School of Engineers2015Licence, Informatique de gestion