Francis Castillo
@ingfranciscastillo
Full Stack Developer (Next.js, Node.js, TypeScript) with an eye for product design, actively open to remote roles.
Dominican RepublicWhat I'm looking for
I'm a Full Stack Developer based in the Dominican Republic, building web applications since 2020 with TypeScript, Next.js, Astro, and Node.js/NestJS.
From 2023 to 2025 I worked at 100eSignature, building the frontend for their digital signature platform — document validation, API integrations, and performance work. Before that, at Evolution Solar System LLC (2021–2022), I built their corporate website from the ground up.
In parallel since 2015, I've also been responsible for the IT infrastructure of a law firm — systems, hardware, backups, and their website — which gave me hands-on experience keeping software reliable in production, not just shipping it.
Outside of work I build my own products: Vitalgate (blocks GitHub PRs that regress Core Web Vitals), WebDiff (diffs webpages and explains changes in plain language), and Vitta (personal fitness tracking) — all built with TanStack Query/Router/Start, Drizzle, and Better Auth.
I'm actively looking for a remote full-time role where I can own things end to end, from UI details to the backend and infra behind them.
Experience
Work history, roles, and key accomplishments
IT & Systems Manager
Castillo Melo Law Firm
Jan 2015 - Present (11 years 8 months)
Managed technology infrastructure, provided technical support, and implemented backup systems. Built and maintained the firm's website and contributed to digitizing internal processes.
Frontend Developer
100ESIGNATURE
Jan 2023 - Jan 2025 (2 years)
Built web interfaces for the digital signature platform, prioritizing clarity and trust. Developed electronic document validation features and integrated APIs for document processing and verification.
Web Developer
Evolution Solar System LLC
Jan 2021 - Jan 2022 (1 year)
Built the corporate website from scratch with JavaScript, HTML, and CSS. Maintained and improved the platform, implementing new features in collaboration with the product team.
Education
Degrees, certifications, and relevant coursework
Universidad Dominicana O&M
Bachelor of Science, Systems and Computer Engineering
2015 - 2021
Pursued a Bachelor of Science in Systems and Computer Engineering, focusing on software development and systems infrastructure.
Tech stack
Software and tools used professionally
Availability
Location
Dominican RepublicAuthorized to work in
Website
franciscode.devPortfolio
franciscode.devSalary expectations
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