You're seeing this page as if you were . The main menu is still yours, though. Exit from immersion
Guillaume MorinGM

Guillaume Morin

Développeur Go React

450 €/jour
Barcelone, ES
3-7 ans

Délai de réponse moyen : 1h

À propos de Guillaume

🔎Are you looking for a developer who can build high-performance Golang APIs and React Native mobile applications?

I’m a software engineer specialized in Golang and mobile development, with 5+ years of experience delivering production-ready systems.

I currently work on Racemappr, a sports mobile application that lists 100,000+ sporting events, featuring advanced mapping, geolocation, and mobile performance optimization.

I’ve also collaborated with Squirrel, a digital agency where I contributed to multiple projects across health, dating, e-commerce, and sports, building Golang APIs, backend architectures, and web/mobile applications.

What I can bring to your project:

• Development of high-performance backend services in Golang
• Building React Native mobile apps (iOS & Android)
• Designing scalable and maintainable architectures
• Implementing testing, CI/CD pipelines, and engineering best practices

I value clear communication and consistent progress updates throughout a project.
  • Français

    Bilingue ou natif

  • Espagnol

    Bilingue ou natif

  • Anglais

    Bilingue ou natif

En télétravail uniquement
Travaille majoritairement à distance

Expériences

  • Racemappr
    Full-Stack/Mobile Developer
    septembre 2024 - Aujourd'hui (1 an et 9 mois)
    Barcelone, Espagne
    📱As a Mobile & Backend Developer at Racemappr (startup/scale-up listing 100,000+ sports events), I helped build and scale the product that powers event discovery and a smooth mobile experience for athletes and organizers across iOS and Android.


    🚀What I do:

    Delivered core mobile features end-to-end in React Native, from UI/UX implementation to performance tuning and release readiness for both platforms

    Designed and implemented backend capabilities on Supabase (Postgres), including data modeling for large event catalogs and efficient querying for search/filter use cases

    Strengthened app reliability through debugging, monitoring, and iterative improvements across the stack

    Collaborated closely with product/design to ship fast, iterate on feedback, and improve user journeys

    🧑‍💻Tech stack
    React Native, TypeScript/JavaScript, Supabase (Postgres, Auth, Storage, Edge Functions), REST/HTTP APIs, Git, CI/CD, iOS & Android release
    React Native Supabase Application Mobile Google Map React.js
  • Biomass Concept
    Full-Stack Developer
    juillet 2023 - août 2024 (1 an et 1 mois)
    Barcelone, Espagne
    🔨As a Full Stack Engineer at Biomass Concept, I contributed to the design and development of an internal ERP, building a robust, scalable system to support core business operations. I worked across the stack to deliver reliable features quickly, with a strong focus on maintainability, performance, and clean architecture.

    🚀What I did

    Developed end-to-end ERP modules: from requirements to implementation, testing, and deployment

    Built and maintained backend services in Go, designing scalable APIs and core business logic

    Implemented a GraphQL layer to streamline data access, reduce over-fetching, and improve frontend velocity

    Created responsive, reusable UI components in React with TailwindCSS, ensuring consistency and usability

    Improved system reliability and scalability through refactoring, performance tuning, and collaboration with stakeholders

    🧑‍💻Tech stack
    Golang, GraphQL, React, TailwindCSS, API design, Git, CI/CD
    PostgreSQL GO Développement Back-End Développement Front-End React.js
  • Squirrel - Agence digitale
    Full-Stack developer
    juillet 2021 - juillet 2023 (2 ans)
    🔨As a Remote Full Stack Engineer within a web & mobile development agency, I contributed to multiple client products, delivering both frontend and backend features with a strong focus on quality, performance, and faithful implementation of detailed designs.

    🚀What I did:

    Built React + TypeScript front-ends from precise Figma specs (pixel-perfect UI, reusable components, responsive layouts)

    Designed and developed complete admin back-offices: content management, workflows, roles/permissions, and dashboards

    Developed backend services in Golang using GraphQL and/or REST APIs, implementing business logic, secure endpoints, and integrations

    Modeled and optimized PostgreSQL databases (schemas, queries, performance improvements)

    Delivered across diverse domains: dating apps, healthcare (Google Maps integration, geolocation, advanced search & filters), and sports products

    🧑‍💻Tech stack
    React, TypeScript, Figma, Golang, GraphQL, REST APIs, PostgreSQL, Git, CI/CD
    GraphQL Développement de services Backend Développement Front-End React.js GO

Recommandations

Soyez le premier à recommander Guillaume

Contribuez à la réussite de ce freelance en partageant votre expérience de collaboration avec lui.

Ces profils de freelance correspondent également à vos critères

AgathaA

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

2

BaptisteB

Baptiste Duhen

Fullstack developer

4.6

(4)

5

AmedA

Amed Hamou

Senior Lead Developer

4

(2)

7

AudreyA

Audrey Champion

Web developer

4.3

(3)

4

Formations

  • Expert en technologie de l'information
    Epitech Technology
    2023
    In essence, the initial two years of Epitech’s Grande École Program are dedicated to acquiring proficiency in fundamental programming languages, with a special focus on C and C++. This forms an essential groundwork, imperative for those envisioning a future in IT expertise, whether it be in software engineering, artificial intelligence, or cybersecurity.

Certifications

Compétences

Catégories