Justine Jusi

About

I am a Full-Stack Developer and SEO Specialist with over six years of professional experience building scalable web applications, high-performance platforms, and conversion-focused digital systems for growing businesses. I specialize in developing clean, maintainable architectures that improve user experience, automate workflows, and drive measurable business results. My core expertise includes the MERN stack (React, Next.js, Node.js, Express, MongoDB) and modern PHP frameworks such as Laravel and CodeIgniter. I work extensively with TypeScript, PostgreSQL, and MySQL, with strong experience in database architecture, query optimization, and backend performance tuning. I design and develop RESTful APIs, integrate third-party services, implement secure authentication systems using JWT and OAuth, and build scalable backend infrastructures following industry best practices. I have hands-on experience deploying and managing production applications on AWS, including EC2, RDS, and S3, as well as VPS environments, cPanel hosting, and modern deployment platforms like Vercel. I understand server configuration, environment management, CI/CD workflows, and DevOps fundamentals to ensure secure, stable, and optimized deployments. Beyond full-stack development, I specialize in WordPress and Shopify development, including custom theme development, Shopify Liquid customization, plugin development, technical SEO optimization, structured data implementation, and advanced site speed optimization. My SEO background allows me to build websites and applications that are not only technically robust but also fully optimized for search engines, Core Web Vitals, and organic growth. My development approach focuses on scalable system design, server-side rendering (SSR), and static site generation (SSG) using Next.js, performance optimization, clean Git-based workflows, and effective collaboration within Agile teams. I prioritize writing clean, documented, and maintainable code that supports long-term growth. I am results-driven, detail-oriented, and passionate about solving complex technical problems. I thrive in fast-paced, remote environments where ownership, innovation, and continuous improvement are valued. Portfolio: https://just-code-three.vercel.app/