Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I am a Senior Full-Stack Developer with 10+ years of experience building scalable web applications and APIs in fintech and high-volume systems. I thrive working independently in remote settings, owning projects end-to-end—from requirements gathering and client communication to architecture, development, and delivery. My strongest expertise is in React, TypeScript, Node.js, and .NET. I deliver high-quality, maintainable solutions with minimal supervision and a focus on performance and reliability. I enjoy collaborating with cross-functional teams to translate business needs into robust technical implementations.…I am a Senior Full-Stack Developer with 10+ years of experience building scalable web applications and APIs in fintech and high-volume systems. I thrive working independently in remote settings, owning projects end-to-end—from requirements gathering and client communication to architecture, development, and delivery. My strongest expertise is in React, TypeScript, Node.js, and .NET. I deliver high-quality, maintainable solutions with minimal supervision and a focus on performance and reliability. I enjoy collaborating with cross-functional teams to translate business needs into robust technical implementations.

Alex Samuel Benavidez Zelaya

Full Stack Developer, Back-End Developer, Web Developer, +2





I am a Senior Full-Stack Developer with 10+ years of experience building scalable web applications and APIs in fintech and high-volume systems. I thrive working independently in remote settings, owning projects end-to-end—from requirements gathering and client communication to architecture, development, and delivery. My strongest expertise is in React, TypeScript, Node.js, and .NET. I deliver high-quality, maintainable solutions with minimal supervision and a focus on performance and reliability. I enjoy collaborating with cross-functional teams to translate business needs into robust technical implementations.…I am a Senior Full-Stack Developer with 10+ years of experience building scalable web applications and APIs in fintech and high-volume systems. I thrive working independently in remote settings, owning projects end-to-end—from requirements gathering and client communication to architecture, development, and delivery. My strongest expertise is in React, TypeScript, Node.js, and .NET. I deliver high-quality, maintainable solutions with minimal supervision and a focus on performance and reliability. I enjoy collaborating with cross-functional teams to translate business needs into robust technical implementations.

Available to hire

I am a Senior Full-Stack Developer with 10+ years of experience building scalable web applications and APIs in fintech and high-volume systems. I thrive working independently in remote settings, owning projects end-to-end—from requirements gathering and client communication to architecture, development, and delivery.

My strongest expertise is in React, TypeScript, Node.js, and .NET. I deliver high-quality, maintainable solutions with minimal supervision and a focus on performance and reliability. I enjoy collaborating with cross-functional teams to translate business needs into robust technical implementations.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

Spanish; Castilian

Fluent

English

Advanced

Work Experience

Senior Systems Analyst & Developer at BANPRO (Bank of Production)

January 1, 2020 - Present

Owned end-to-end backend services and API development in a high-volume financial environment. Led third-party integrations with payment gateways (CyberSource/Visa), ensuring secure and reliable system communication. Gathered requirements with stakeholders and delivered scalable solutions with minimal supervision. Optimized database queries and backend processes to improve performance and reliability in high-load conditions. Designed and developed scalable backend microservices using .NET following Clean Architecture principles. Collaborated with cross-functional teams (Product, QA, stakeholders) to translate business requirements into technical solutions. Provided production support for mission-critical systems, maintaining high availability (~99.9%) and rapid incident resolution. Built and consumed REST APIs for data exchange between internal systems and external providers.

Software Developer at Nicaraguan Tourism Institute (INTUR)

January 1, 2017 - January 1, 2020

Developed and maintained a Tourism Information System using Java/Spring and PostgreSQL. Built modular UI components and backend services to support multiple internal and external users. Designed and optimized complex SQL queries and contributed to database design and reporting systems.