Open to opportunities

Javier Núñez Araya

@javiernezaraya

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Full Stack Engineer specializing in React, TypeScript, and .NET for high-quality web apps.

Costa Rica

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What I'm looking for

I'm seeking a senior engineering role where I can lead end-to-end web app development, improve delivery pipelines, and work with a collaborative team focused on performance, testing, and scalable cloud solutions.

I am a Full Stack Engineer with 7+ years building production systems focused on high-quality web applications using React, TypeScript, and .NET. I lead with testing, performance, and reliable delivery while maintaining strong cross-team collaboration.

I've worked across Azure, Python/FastAPI, Node.js, and multiple databases (PostgreSQL, MongoDB, Cosmos DB), owning architecture and integrations for cloud platforms and services. I have hands-on experience implementing PWAs, service workers, and route-based code splitting to boost performance and offline capability.

As a tech lead and engineer at Tridius and previous roles at Microsoft and Intel, I established CI/CD pipelines, delivery standards, and improved reliability and latency through API management and infrastructure automation. I also built big-data analysis pipelines and production dashboards to drive actionable insights.

I bring a practical, results-driven approach—comfortable designing end-to-end solutions, automating workflows, and shipping scalable systems. I'm passionate about accessible, responsive design and continuous improvement in engineering processes.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Engineer

Current

Infinite Computer Solutions

Jan 2025 - Present (9 months)

Build and maintain high-performance React TypeScript PWAs with service workers and route-based code splitting; collaborate with backend teams to enforce accessibility and improve perceived performance and reliability.

React TypeScript PWA Service Workers Workbox Playwright Azure Functions CI CD GitHub Actions

Full Stack Developer

Tridius Technologies

Nov 2022 - Jan 2025 (2 years 2 months)

Served as Tech Lead for an Azure cloud platform, owning architecture and integration across .NET APIs and a React front end; established CI, code-review gates, and delivery standards to improve reliability and latency.

Azure .NET ASP.NET Core C++React CI CD Azure Front Door MongoDB

Software Engineer

Microsoft Regional Operations

Jan 2022 - Nov 2022 (10 months)

Modernized cloud engineering systems and refactored .NET Core frameworks to boost performance and developer productivity; built big-data analysis pipelines and dashboards to measure developer engagement.

.NET Core C++Big Data Data Pipelines Azure Power BI Python Dashboards Developer Productivity Performance Optimization

Product Development Engineer

Intel Corporation

Feb 2020 - Dec 2021 (1 year 10 months)

Automated quality-control workflows with Power BI/Power Apps and implemented internal ticketing with Power Automate; analyzed multi-source data with Python and deployed React + .NET reports on Azure to improve team efficiency.

Power BI Power Automate Python React .NET Azure Data Analysis Automation)SharePoint Automation

Junior Developer

Continental Security Group

Jan 2018 - Feb 2020 (2 years 1 month)

Developed an ERP for HR and finance using Blazor, .NET and SQL on Azure and maintained company websites, improving internal processes and online presence.