Donny Nunez

Donny Nunez

$55/hr
Full-stack enterprise engineer focused on Angular and .NET, with strong Java and Python skills.
Reply rate:
-
Availability:
Full-time (40 hrs/wk)
Location:
San Jose, San Jose, Costa Rica
Experience:
20 years
About

I’m a senior full-stack software engineer focused on building dependable, scalable products in complex enterprise environments. Over the last several years I’ve worked on high-traffic, customer-facing platforms where performance, maintainability, and clean design matter as much as shipping features. My core stack is Angular on the front end and .NET/C# on the back end, and I regularly complement that work with Java and Python whether it’s prototyping services, automating workflows, or validating ideas quickly.

I enjoy working end-to-end: translating fuzzy business needs into clear technical plans, designing APIs and data models, implementing UI experiences that feel fast and intuitive, and then tuning the system until it holds up under real-world load. A lot of my recent work has centered on modernizing legacy patterns, improving session and state handling, reducing latency, and adding observability so teams can see what’s happening in production. I’m comfortable going deep on tricky issues threading, caching layers, SQL performance, GraphQL filtering, or deployment edge cases and I like leaving the codebase cleaner than I found it, with solid tests and documentation.

I care a lot about architecture and craftsmanship. I lean on SOLID principles, Domain-Driven Design, and pragmatic clean architecture to keep systems modular and adaptable. I’ve also spent a good chunk of time in DevOps-adjacent work: Dockerizing services, simulating multi-node environments locally, troubleshooting CI/CD or package/version conflicts, and partnering with teams to make releases smoother. I’m not tied to any one tool; I focus on what’s right for the product and the team.

Colleagues know me as someone who is proactive, collaborative, and direct in a constructive way. I like mentoring, sharing patterns that work, and helping unblock others whether through code reviews, pairing, or writing clear technical notes. Bilingual in Spanish and English, I’m comfortable working with global teams and communicating with both technical and non-technical stakeholders.

What motivates me most is building software that genuinely helps people and businesses, and doing it with a team that values quality, curiosity, and continuous improvement.

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