César Clavería | Full Stack Developer

Software Engineer with over 15 years of experience, passionate about development, technology, and how it can improve our lives.

About me

About Me

I’m César Clavería, a full-stack software developer with more than 15 years of experience building robust and scalable applications.
My expertise spans .NET (C#) for backend APIs and web applications, Node.js services, and mobile apps using React Native and Flutter.
Over the years, I’ve delivered solutions for sectors like financial services, SaaS, telecom, higher education, and retail.

I enjoy creating clean, maintainable code and turning ideas into products — from proof-of-concepts to fully deployed systems.
My professional background includes:

  • Leading backend and mobile development for production systems with thousands of active users.
  • Maintaining and modernizing legacy platforms, reducing bugs, and improving performance.
  • Integrating with diverse APIs and third-party platforms such as Salesforce, QuickBooks, Stripe, and many more.
  • Introducing modern development practices, CI/CD pipelines, and UI frameworks in multiple teams.

Beyond my work, I’m passionate about playing guitar, exploring new technologies, and building side projects that solve real-world problems.
I live in Guatemala and, in addition to my professional work, I’m focused on starting a side business to generate extra income through freelancing and SaaS development.

Skills & Interests

  • Languages & Frameworks: .NET (C#), Node.js, JavaScript, TypeScript, React, React Native, Flutter
  • Databases: SQL Server, PostgreSQL
  • Cloud & DevOps: Cloudflare, Azure, AWS, Docker, GitHub Actions, Jenkins
  • Other Interests: Guitar, classic rock, basketball, gaming, anime, and manga

I believe in continuous learning, sharing knowledge, and creating software that makes a tangible impact.

Table of Contents

Work Experience

  1. •

    Senior Software Engineer

    Rampt.dev

    Contractor through Rampt.dev for Emburse, maintaining and improving expense management platforms. Work spans .NET/C# backends, SQL Server, mobile apps (iOS, Android, React Native), integrations with Salesforce, QuickBooks, Xero, and others. Focused on bug fixes, security updates, and performance improvements while keeping integrations and frameworks current.
  2. •

    Senior Software Engineer

    Corporate Central

    Led development of a highly customizable web application platform and its monitoring-focused counterpart, building modules for location tracking, inventory control, sensor data processing via MQTT, and complex event-driven workflows. Delivered mobile apps (Cordova) integrating real-time tracking, geofencing, and third-party APIs for aviation, maritime, and mapping services.
  3. •

    Senior Developer / Project Manager

    Viaro Networks

    Worked on diverse client projects spanning multiple sectors from companies, universities, telecom, and healthcare. Delivered web and desktop applications built on OpenACS/dotLRN, PostgreSQL, Oracle, and ASP.NET, including SaaS platforms for community building and e-learning. Led high-priority projects such as internal training systems, vetting systems and custom automation for financial clients, consistently delivering on time. Helped grow the team, interviewing and training new hires, establishing development policies, and mentoring.

Stack Technological

Ready to work together? Let's work together.

Contact Me