Open to opportunities

Demostenes Garcia

@demostenesgarcia

Message

Senior full-stack engineer building scalable React/Next.js systems with TypeScript and SQL-backed architectures.

Panama

Message

What I'm looking for

I’m looking for a team where I can own features end-to-end—building scalable React/Next.js architectures with strong testing, API integration, and accessibility. I want room to refactor safely and use AI-assisted workflows with strict review.

I’m a senior full-stack engineer with nearly two decades of experience delivering production-grade React/Next.js applications. I specialize in scalable component architectures, integrating third-party APIs, debugging complex data flows, and safely refactoring legacy codebases with a strict testing discipline.

I’ve owned end-to-end features across SaaS, healthcare, and fintech—building frontend platform architecture and Rails backend integrations, and delivering accessible UI components for high-scale banking environments. I also apply AI-assisted engineering workflows (Claude Code, OpenAI Codex, ChatGPT, Gemini) to accelerate prototyping, refactoring, and test generation while maintaining rigorous engineering review standards.

Experience

Work history, roles, and key accomplishments

Current

Software Engineering Consultant

Current

CollectiveHealth

Feb 2010 - Present (16 years 5 months)

Modernized a legacy AngularJS codebase to React and Next.js, delivering production features with zero downtime. Implemented accessibility (WCAG) and Spanish localization, and governed a reusable design system across a monorepo architecture.

AngularJS React Next.js Accessibility ADA Compliance Localization Design Systems TypeScript UI Engineering Cross Functional Collaboration

Current

Software Engineering Consultant

Current

Bank of America, Yodlee & American Express

Feb 2010 - Present (16 years 5 months)

Built ADA-compliant frontend UI components for banking interfaces with secure, accessible experiences and complex financial API integrations. Migrated legacy JSP experiences to modern Ruby-based static site generation and delivered maintainable, cross-browser solutions for enterprise platforms.

ADA Compliance Accessibility API Integration JSP Ruby Secure UX Maintain Frontend Engineering

Current

Software Engineering Consultant

Current

ProductPlan

Feb 2010 - Present (16 years 5 months)

Owned frontend platform architecture and led full-stack development of strategic product modules. Built scalable React/TypeScript component architectures, integrated with Rails backend services and third-party APIs, and ensured strong test coverage for production features.

Chief Information Officer (CIO)

IFARHU

Jul 2014 - Jun 2019 (4 years 11 months)

Led a 35-member technology team responsible for national-scale IT modernization, infrastructure, cybersecurity, software delivery, and digital transformation. Oversaw payment processing at 2.2M+ transactions, launched ATM-based payment infrastructure, maintained zero security breaches for 5 years, and rebuilt institutional web applications using mobile-first principles.

IT Modernization Infrastructure Cybersecurity Software Delivery Digital Transformation Payments Processing Security Governance Team Leadership Network Modernization Institutional Platforms

Education

Degrees, certifications, and relevant coursework

Universidad Internacional de Valencia

Master's degree, Software Development for Web and Services

Completed a master’s in software development for web and services, with coursework covering testing and API integration (e.g., Playwright, Jest, React Testing Library, and Cypress).