Sean Francis
Senior Software Engineer (Full Stack & Blockchain & AI)
Senior Software Engineer with 10+ years of experience building and scaling full-stack applications across diverse industries. Proficient in Golang, Python, PHP, Angular and MERN Stack, delivering high-performance, user-centric solutions. Strong background in AI-driven development, leveraging machine learning and automation to optimize workflows and enhance decision-making. Experienced in Web3 technologies, integrating blockchain for secure, decentralized applications. Well-suited for fast-paced startups, excelling in both frontend and backend development, driving architecture decisions, and rapidly iterating on features. Known for problem-solving, technical leadership, and leading cross-functional teams to build scalable, efficient systems.
Work Experiences
Senior Full Stack Engineer
- Architected and developed a scalable platform, designing the frontend (React) and backend (Gin) to support highperformance user interactions.
- Enhanced UI/UX for onboarding and home feed, implementing progressive loading, real-time content updates, and accessibility enhancements, increasing user retention by 15%.
- Built an SEO-optimized SPA using React, implementing server-side rendering (SSR) and dynamic metadata injection, increasing organic traffic and search visibility.
- Led the development of Blaze Points, an in-app virtual currency system, ensuring secure transaction handling and efficient state management for seamless user engagement.
- Integrated Cloudinary for media storage, optimizing image and video compression, reducing load times by 32% while maintaining high visual quality.
- Refactored core frontend components with React hooks and lazy loading, improving code reusability, maintainability, and real-time content updates.
- Designed and optimized RESTful APIs using Golang(Gin), improving database query efficiency in MongoDB and reducing backend response times by 17%.
- Integrated AI-driven solutions for data analysis, automation, and predictive modeling using Python(TensorFlow).
- Implemented CI/CD pipelines using Docker, GitHub Actions, and AWS services to streamline deployments and improve platform scalability.
Lead Full-stack Engineer
- Led the UI/UX design system implementation, ensuring consistency and accessibility across web and mobile platforms.
- Developed and maintained a scalable full-stack application using Next.js, and Golang(Fiber), ensuring high performance and seamless user experience.
- Built and optimized backend services in Python(Django), improving system efficiency and data processing
- Designed interactive dashboards with GraphQL and D3.js, enhancing real-time analytics and user engagement.
- Mentored junior developers, conducting code reviews and sharing best practices in Next.js, Golang, and API integration, fostering a culture of continuous learning and technical excellence.
Web3 Engineer
- Built the Nexis Wallet browser extension with React and Web3.js, ensuring smooth and secure blockchain interactions.
- Developed Solidity smart contracts for handling secure asset transfers and transaction automation on an EVMcompatible network
- Integrated Web3.js and Ethers.js, making wallet transactions more reliable and efficient.
- Used Laravel for off-chain services, managing API interactions, authentication, and additional data processing
- Refactored the frontend architecture with Redux, improving app responsiveness and state management.
Full Stack Engineer
- Developed and maintained marketing automation platforms using Angular, Express.js, and PostgreSQL, improving campaign performance tracking.
- Built interactive dashboards with real-time data visualizations, enabling clients to analyze campaign metrics more effectively.
- Optimized website performance and SEO, reducing load times by 20% and improving search engine visibility
- Designed and integrated RESTful APIs, streamlining data collection and automating reporting workflows.
Front-end Developer
- Translated the design team’s UX wireframes and mockups into responsive, interactive features using HTML, CSS, and JavaScript.
- Redesigned the frontend architecture with React.js, utilizing Redis and DataDog to enhance performance and scalability.
- Worked with the agile team to migrate a legacy company website to React and Sass..