Available · Barcelona, Spain

Javier Silvestri

~$  Flutter Developer

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01 — About

WHO AM I

Javier Silvestri
Barcelona

1+

YRS EXP

50K+

APP USERS

20+

SKILLS

∞

COFFEE

Junior Software Developer based in Barcelona with over one year of experience delivering production-grade applications. Specialized in Flutter, Dart, and Firebase, with a broad foundation in React, TypeScript, and Node.js.

Relocated from Argentina to Spain. Focused on clean architecture, performance, and scalable mobile + web experiences.

Download CV
javier@portfolio:~ ● READY
02 - Experience

WHERE I'VE WORKED

Junior Software Developer

RunaID IT Consulting Services

Full-Time · San Luis, Argentina

Apr 2022 — Aug 2023
Flutter Dart Firebase REST APIs Agile/Jira

Responsibilities

  • ▸ Delivered new features for DOSEP San Luis (50,000+ downloads) using Flutter/Dart.
  • ▸ Maintained Flutter SDK compatibility and managed third-party package dependencies.
  • ▸ Collaborated across QA, UX/UI, and product teams in fast-paced Agile sprints.
  • ▸ Debugged and optimized Firebase Push Notifications for improved delivery reliability.

Accomplishments

  • ✦ Improved app performance by 30% through targeted refactoring and critical bug fixes.
  • ✦ Ensured long-term app scalability with clean dependency management and SDK upgrades.

Freelance Flutter Mobile Developer

City Government of San Luis

Freelance · San Luis, Argentina

Nov 2022 — Jun 2023
Flutter Dart REST APIs Real-time Data

Responsibilities

  • ▸ Reverse-engineered undocumented code in SIGEM S.L. to fix critical bugs and restore functionality.
  • ▸ Built a booking appointments feature across municipal services (driver licenses, permits).
  • ▸ Maintained an internal real-time bus tracking app with accurate location updates and ETAs.
  • ▸ Collaborated with government stakeholders to ensure app stability under tight deadlines.

Accomplishments

  • ✦ Onboarded quickly to a complex legacy codebase with zero documentation.
  • ✦ Delivered booking system across 3+ municipal services, improving citizen UX significantly.

Now — Open to new opportunities in Barcelona or remote

Education

2019 — 2021

National University of San Luis

University Technician in Web & Mobile Development

San Luis, Argentina

2022 — 2024

Platzi

Web/Mobile Development · Cloud Computing · English · Leadership

Online

Web Development Mobile Development Cloud Computing English Academy
03 — Projects

RECENT WORK

Select a project to explore.

projects.exe — Javier Silvestri ● READY

~$ ls ./projects

  • ▸ DOSEP MOVIL ★
  • ▸ SIGEM S.L. ★
  • ▸ CHEFCO PASTAS
  • ▸ EUGE FOTOGRAFIA
  • ▸ ROCKETS EXPLORER ★
  • ▸ TESLA CLONE

$ 6 entries

$ 3 featured

CONSOLE
04 — Skills

MY TOOLKIT

Technologies and tools I build with.

📱 Mobile

Flutter (v2/v3) Dart Swift (v6) SwiftUI Kotlin React Native

🌐 Frontend

TypeScript React Next.js Astro Tailwind CSS JavaScript ES6+

⚙️ Backend

Node.js NestJS Firebase PostgreSQL MongoDB REST APIs Python

🔄 State Mgmt

BLoC Provider GetX Zustand Redux

🚀 DevOps

Git GitHub Actions Docker CI/CD Agile/Scrum Postman

🤖 AI-Assisted

GitHub Copilot Claude ChatGPT Gemini
05 — Open Source

GITHUB

~$ gh api /users/di4m0nds --dashboard mock /di4m0nds

18

◈ Repositories

6

★ Total Stars

12

◉ Followers

20

◎ Following

output: language breakdown

Dart 38% TypeScript 24% JavaScript 18% HTML/CSS 12% Other 8%

output: contribution activity (last 52 weeks)

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