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Amir SarsenAS

Amir Sarsen

Expert Fullstack & Mobile Developer

450 €/jour
Paris, FR
3-7 ans

Délai de réponse moyen : 1h

À propos de Amir

With 5 years of experience in fullstack and mobile development, I bridge the gap between technical complexity and seamless user experience.

I specialize in delivering high-quality freelance work that hits the market ready to perform. My approach combines technical expertise with a strong product mindset—meaning I help you make the right architectural decisions to save time and money down the road. I have a track record of delivering projects on time without cutting corners on testing, security, or scalability.

My Technical Stack:
  • Frontend: React, Next.js, TypeScript
  • Mobile: React Native, Expo
  • Backend: NestJS, Python
Whether you are building an MVP from scratch or need to scale an existing platform with clean, maintainable code, I am ready to jump in.

Ready to launch or upgrade your application? Contact me to schedule a briefing.
  • Russe

    Bilingue ou natif

  • Français

    Capacité professionnelle complète

  • Anglais

    Capacité professionnelle complète

Accepte de travailler sur site
Paris (jusqu’à 50 km)

Expériences

  • arkady
    Software engineer
    janvier 2024 - avril 2025 (1 an et 3 mois)
    Lille, France

    Scaling Architecture & Performance Optimization

    Backend Architecture & Performance: Re-architected the backend from AWS Amplify to a custom NestJS stack, reducing average request latency by .
    DevOps & Infrastructure: Integrated Docker Compose to unify Backend, Frontend, and AI services, cutting inter-service latency by 40% and minimizing cold start times.
    Mobile Development: Built a high-performance React Native iOS app featuring real-time geolocation via Mapbox and AWS AppSync.
    Web Quality: Delivered a scalable Next.js web app, achieving 95+ Lighthouse scores for Performance and SEO.
    Impact: Collaborated on rapid product iterations, enabling the platform to scale smoothly to 1000+ Daily Active Users.
    Next.js React Native NestJs Mapbox Amazon Web Services
  • Vinidaily
    Full-stack Developer
    septembre 2022 - janvier 2024 (1 an et 4 mois)
    Paris, France

    Fullstack Optimization & Scalability

    • Cross-Platform Performance: Optimized React Native and React.js applications, improving load times by 30% and significantly reducing crash rates across iOS and Android.
    • Backend Architecture: Redesigned the backend using NestJS and GraphQL, slashing API response times from 100ms to 20ms.
    • Code Quality & Reliability: Refactored 50+ frontend components using TypeScript and TailwindCSS, increasing maintainability and cutting bug reports by 40%.
    • Scalability: Maintained 99.9% availability during 5× traffic spikes and implemented debounced search to reduce API load by 70%.
    React Native React.js NestJs Typescript TailwindCSS
  • Niagara tech.
    Frontend Developer
    janvier 2022 - septembre 2022 (8 mois)
    • Implemented 20+ UI components in Vue.js with Vuetify, ensuring responsive design and full alignment with product specifications.
    • Refactored legacy codebases, reducing technical debt by 35% and accelerating feature delivery cycles.
    • Integrated Firebase and Google Cloud services, streamlining backend operations and securing scalable deployment pipelines.
    • Developed new features and maintained core logic, contributing to a 25% boost in user engagement and overall system stability.

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Formations

  • BAC+5 Responsable de projet web et mobile
    Epitech Paris
    2022
    BAC+5 Responsable de projet web et mobile

Compétences

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