Carl Saginsin

Articles

Experience

  • Senior Software Engineer
    Keep It Simple · Full-time
    Grove City, OH · Remote

    Leading the design and development of AI-powered fitness management systems using React.js, Express.js, Prisma/MySQL, and OpenAI APIs. Spearheaded the Command Center project — a modern, full-stack dashboard that helps fitness professionals manage clients, sync data with Trainerize, and deliver real-time, AI-assisted workout recommendations.

    • Architected scalable backend services using Express.js + Prisma ORM, handling real-time messaging, Trainerize webhooks, and AI-driven responses.
    • Developed an interactive frontend with React.js (Vite) and TailwindCSS, ensuring a responsive, mobile-first design optimized for performance and usability.
    • Integrated OpenAI GPT-4o-mini to generate personalized workout plans and contextual AI chat features for fitness coaches.
    • Implemented real-time synchronization using WebSocket and webhook systems, providing instant updates for client and message data.
    • Designed and managed robust MySQL database schemas to efficiently store client data, chat logs, and AI templates.
    • Optimized development workflow through a clean CI/CD pipeline, cost-efficient infrastructure, and modular feature deployment.
    • Collaborated closely with product stakeholders to align technical decisions with business goals, ensuring scalable, maintainable, and impactful delivery.
    Next.jsTailwindCSSSupabaseVercelPostgreSQLOpenAIGeminiArchitectureCI/CD
  • Lead Software Engineer
    SOS - Smart Outsourcing Solution
    BGC, Taguig, PH · Remote

    I defined company-wide technical direction for AI-first SEO, ensuring our website and content are fully discoverable across AI models like ChatGPT, Gemini, Claude, and Perplexity. My work bridges technical SEO, content strategy, and AI-first web optimization, making our brand visible in the future of search.

    Beyond optimization, I lead our technical team to bring these strategies to life—whether through content frameworks, structured data implementation, or custom solutions. I also drive the development of our in-house WordPress Plugin, designed to automate and scale AI SEO best practices for our company.

  • Co-Founder & Chief Technology Officer
    Craftora · Part-time
    Manila, NCR, PH · Remote

    Chief Technology Officer at Craftora, a dynamic and innovative startup committed to solving real-world challenges with cutting-edge software solutions. At Craftora, we believe in harnessing the power of technology to make a tangible difference in people's lives.

    NextJSTailwindCSSSupabaseVercelPostgreSQLArchitectureProject Management
  • Software Engineer
    QVantage · Full-time
    Singapore · Remote

    Developed advanced AI-driven bots using Python and built RESTful APIs, with a focus on automating complex tasks, delivering exceptional customer support, and enhancing user engagement.

    Adept at creating robust, secure, and well-documented APIs enabling seamless communication and data exchange between diverse applications. Collaborated across functions to deliver user-centric products aligned with business goals.

    PythonFlaskSeleniumHuggingFaceSupabasePostgreSQLVercelArchitecture
  • Full Stack Developer
    PocketDevs · Internship
    Mandaluyong City, PH

    Developed and designed a variety of full stack web applications, mastering best practices in software development and UI/UX design to deliver robust, scalable, and user-friendly applications.

    Explored and implemented innovative solutions focusing on code quality, maintainability, and scalability, including thorough testing, debugging, and optimization.

    TailwindCSSAlpine.jsLaravelLivewireFigmaArchitecture
  • Freelance Web Developer
    Remote

    Specialized in both frontend and full stack development, delivering high-quality web applications with modern technologies.

    Developed responsive interfaces with React.js and Next.js, and built/maintained full stack apps integrating frontend with backend services using Firebase.

    ReactJSNext.jsTailwindCSSFirebaseMySQLFigmaArchitecture