Juan Vicente Espert Esteve

JUAN VICENTE ESPERT ESTEVE

Senior Full-Stack Software Engineer

📧 jvespert.dev@gmail.com 🔗 www.linkedin.com/in/jvespert 📱 +34 648 723 912 📍 Valencia, Spain (Remote)

Professional Profile

Software Engineer with over 8 years of experience building web and mobile applications from scratch. I specialize in real-time monitoring platforms, industrial software, with practical experience integrating payment gateways in P2P applications. I have a strong background in React, TypeScript, C#/.NET, Python, and mobile development (Kotlin/React Native). I am comfortable taking full ownership of projects, making technical decisions, and solving complex concurrency and data availability problems.

Core Skills

Frontend & Mobile

React, React Native, TypeScript, JavaScript, Zustand, HTML/CSS, WebSockets, WebRTC, Kotlin, Java (Android)

Backend & Cloud

Node.js, Python, C#/.NET, SQL Server, MongoDB, Supabase, Vercel, Docker

Architecture & Concepts

Event-Driven Architecture, System Reliability, API Design, Payment Gateway Integrations (Stripe), Concurrency

Work Experience

Full-Stack Engineer | ETRA November 2022 - Present
  • Real-Time Architecture: Led the frontend architecture for mission-critical IoT platforms (EV charging and Smart City monitoring) using React. The system handles thousands of concurrent device events using WebSockets and DDP subscriptions without performance drops.
  • System Reliability: Built an automated fallback system using Electron for EV charging stations. If the main cloud server goes down, the screens automatically switch to local servers to keep showing real-time data without human interaction.
  • Complex Frontend Logic: Solved browser race conditions using the Web Locks API to build a WebRTC/SIP emergency call system. This ensures operators can manage emergency calls across multiple browser tabs without dropping connections.
  • Tooling & Reusability: Designed a configuration-driven UI ecosystem, including a custom dynamic table library that handles server-side pagination, advanced filtering, and MongoDB data mapping.
Founder & Lead Engineer | Loopeers 2025 - Present
  • Product Ownership: Built a sustainable P2P rental platform from scratch. Got selected for the national final for the ClimateLaunchpad 2026.
  • Payments Integration: Designed the checkout flow using Stripe Connect Webhooks to handle escrow (holding funds), conditional captures, and automatic commission payouts.
  • Tech Stack: Used React Native and serverless backend tools (Supabase, Vercel) to build and deploy the MVP quickly and securely.
Software Engineer | Visia Solutions (Ford Motor Company Projects) October 2018 - November 2022
  • Industrial Software: Developed mission-critical software (Android apps, ASP.NET APIs, SQL Server) for Ford assembly lines. Ensured real-time data synchronization between operator mobile devices and the factory's quality control system..
  • Incident Management: Worked directly on the factory floor, troubleshooting and fixing critical hardware and software issues under pressure to avoid stopping the production line.
  • Reporting & Visual Analytics: Built interactive dashboards and reporting systems featuring dynamic tables, data charts, and defect heatmaps for engineers to monitor real-time plant metrics.
Software Developer Intern | RNB, S.L. July 2017 - September 2017
  • Internal Web Application: Developed a full-stack inventory management web application using Angular, .NET, and Entity Framework to automate and track product sample workflows (colognes, perfumes, and cosmetics).

Education

Languages