Isaí Céspedes Sánchez Valencia

Full‑Stack Software Developer

Tavernes de la Valldigna, ES.

About

Full Stack Software Developer with 4+ years of professional experience building and maintaining scalable SaaS web applications for international, remote-first teams. Frontend-leaning across the stack, with a strong record in TypeScript, React/Next.js, and developer experience. Comfortable owning frontend architecture while contributing across the stack. Available to work fully remotely across US and European time zones.

Work

Stack Builders

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Software Developer

Remote (Spain), Valencian Community, Spain

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Summary

Contributing as a software developer at Stack Builders’ Spain remote team, delivering full‑stack applications and participating in cross-cultural, cross-functional projects under a culture of curiosity and collaboration.

Highlights

Part of Stack Builders’ expansion into Spain, delivering scalable software solutions for international clients.([stackbuilders.com](https://www.stackbuilders.com/insights/celebrating-15-years-of-innovation-growth-and-impact/?utm_source=openai))

Work within a thriving company recognized for technical excellence and innovation.([stackbuilders.com](https://www.stackbuilders.com/insights/celebrating-15-years-of-innovation-growth-and-impact/?utm_source=openai))

Pylon Network

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Software Developer

Benicarló / Castellón de la Plana, Valencian Community, Spain

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Summary

Built features for a solar energy management platform serving electricity providers in Spain, enhancing reporting workflows and delivering custom client solutions under demanding timelines.

Highlights

Delivered key platform features and improved reporting workflows for solar estimation.

Volunteer

Mentor (Volunteer)

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Microverse

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Mentored remote students along Microverse’s full‑stack development program, conducting code reviews, aiding debugging, and instilling best practices.

Highlights

Mentored 200+ students, contributing to improved code quality and confidence among mentees.([twine.net](https://www.twine.net/Lordkaito?utm_source=openai))

Balanced algorithm mastery with full‑stack projects using Ruby, Rails, JavaScript, React, and Redux.([es.linkedin.com](https://es.linkedin.com/in/isaicespedes?utm_source=openai))

Education

Microverse

Remote, Remote, United States of America
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Full‑Stack Web Development Program Software Engineering / Web Development

Skills

Full‑Stack Development

Ruby on Rails, Node.js, Laravel, Kotlin, PHP, JavaScript, TypeScript.

Frontend

React.js, Redux, HTML5, CSS3, Responsive Design, Flexbox.

Backend / Databases

RESTful APIs, PostgreSQL, MySQL, MariaDB.

Testing & Methodologies

RSpec, TDD, Pair Programming, Agile, Organization, Leadership.

Languages

Spanish (native), English (C2 Proficient).

Tools & DevOps

Git, GitHub, Gitflow, Heroku, Netlify, Notion, Claude, GitHub Copilot.