James Mauricio

Senior Bubble.io Developer with 5+ years of experience building scalable, workflow-heavy web applications for startups, agencies, and international clients. Specialized in high-performance systems, complex database architecture, and advanced API/payment integrations. Experienced in extending no-code platforms with custom backend solutions using Node.js and EJS.

Proven experience developing production applications used by over 140,000 users, with a strong focus on performance, scalability, and reliability.

Bubble.io Developer (Volunteer) at Sparkable (2025-10 – Present)

• Contribute to the development of a social content platform (sparkable.cc) that enables users to share content, express ideas, and connect through posts, media, and interactive features
• Improve workflow efficiency and database structure to enhance system performance
• Support feature development, debugging, and continuous platform improvements
• Collaborate with cross-functional teams to deliver scalable and user-focused solutions

Bubble.io Developer (Freelance) at G-AIM Consulting, Belgium (2023-09 – Present)

• Develop and maintain Bubble.io applications for international clients across multiple industries
• Design scalable database architectures and implement complex business workflows
• Integrate third-party APIs and automate business processes
• Extend platform capabilities using Node.js-based backend services when needed
• Optimize application performance, reducing workload usage and improving responsiveness
• Deliver end-to-end solutions from concept to deployment

Bubble.io Developer (Full-Time) at Seleby Inc., Japan (2024-01 – 2026-01)

• Developed and maintained a lottery-style web application (ichica.co) serving approximately 140,000 users
• Implemented complex draw mechanics, randomized selection logic, and ticketing systems
• Designed and optimized workflows to handle high user activity and concurrent participation
• Built admin dashboards for managing draws, users, and platform configurations
• Integrated secure payment systems and ensured reliable transaction handling
• Improved application performance, scalability, and system stability in a live production environment

Bubble.io Developer (Full-Time) at 247 Back Office Professionals (2021-02 – 2022-12)

• Developed and maintained internal systems used by operations teams
• Designed efficient data models and enforced privacy rules
• Improved application performance through workflow and database optimization
• Collaborated with QA and operations teams to ensure system reliability

Bubble.io Developer (Freelance) at Upwork (2021-01 – Present)

• Built MVPs, SaaS platforms, dashboards, and internal tools
• Integrated APIs, payment gateways, and third-party services
• Developed custom backend logic using Node.js and EJS for advanced use cases
• Managed multiple client projects, ensuring timely delivery and high-quality output
• Maintained long-term client relationships through consistent performance

Bachelor of Science in Industrial Engineering – Tarlac State University (2015 – 2021)