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Hi, I’m James Daniel Mauricio, a Senior Bubble.io Developer with 5+ years building scalable, workflow-driven web apps for startups, agencies, and international clients. I specialize in high-performance systems, complex database architectures, and advanced API and payment integrations. I also create hybrid no-code + traditional backend solutions (Node.js and EJS) when needed, and I’ve shipped production applications used by over 140,000 users, optimized for speed, scalability, and reliability.…Hi, I’m James Daniel Mauricio, a Senior Bubble.io Developer with 5+ years building scalable, workflow-driven web apps for startups, agencies, and international clients. I specialize in high-performance systems, complex database architectures, and advanced API and payment integrations. I also create hybrid no-code + traditional backend solutions (Node.js and EJS) when needed, and I’ve shipped production applications used by over 140,000 users, optimized for speed, scalability, and reliability.

James Daniel Mauricio

Web Developer, Front-End Developer, Back-End Developer, +6

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Hi, I’m James Daniel Mauricio, a Senior Bubble.io Developer with 5+ years building scalable, workflow-driven web apps for startups, agencies, and international clients. I specialize in high-performance systems, complex database architectures, and advanced API and payment integrations. I also create hybrid no-code + traditional backend solutions (Node.js and EJS) when needed, and I’ve shipped production applications used by over 140,000 users, optimized for speed, scalability, and reliability.…Hi, I’m James Daniel Mauricio, a Senior Bubble.io Developer with 5+ years building scalable, workflow-driven web apps for startups, agencies, and international clients. I specialize in high-performance systems, complex database architectures, and advanced API and payment integrations. I also create hybrid no-code + traditional backend solutions (Node.js and EJS) when needed, and I’ve shipped production applications used by over 140,000 users, optimized for speed, scalability, and reliability.

Available to hire

Hi, I’m James Daniel Mauricio, a Senior Bubble.io Developer with 5+ years building scalable, workflow-driven web apps for startups, agencies, and international clients. I specialize in high-performance systems, complex database architectures, and advanced API and payment integrations.

I also create hybrid no-code + traditional backend solutions (Node.js and EJS) when needed, and I’ve shipped production applications used by over 140,000 users, optimized for speed, scalability, and reliability.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Work Experience

Bubble.io Developer at Seleby Inc.

January 1, 2024 - Present

Developed a lottery application with dynamic and user-specific features, showcasing strong skills in managing complex workflows and data integration. Optimized application workflows and introduced advanced functionalities to enhance performance and deliver a seamless user experience. Collaborated on designing responsive web applications, and creating modern interfaces that aligned with user needs and trends. Performed comprehensive testing and debugging, ensuring applications were error-free and exceeded client expectations.

Bubble.io Developer at Upwork

January 1, 2021 - October 12, 2025

Played a key role in crafting cutting-edge and user-friendly designs for web applications, ensuring they are responsive and visually appealing. Collaborated with clients to gain insights into their business objectives and devised tailored solutions to fulfill their specific demands.

Bubble.io Developer at Back Office Professionals

December 1, 2022 - October 12, 2025

Developed and customized web applications using Bubble's drag-and-drop editor, API, front-end and back-end technologies. Assisted senior developers in customizing and developing web applications using Bubble.io. Assisted in the development of responsive and modern designs for web applications. Worked with clients to understand their business needs and develop solutions that met their requirements.

Lead Bubble.io Developer at G-AIM Consulting

September 1, 2023 - Present

Developed a sustainability-focused application featuring dynamic data visualization through interactive graphs, enhancing user understanding and engagement with environmental data. Conducted rigorous testing and debugging to deliver a reliable and user-friendly platform that supports meaningful decision-making for sustainability.

Bubble.io Developer (Volunteer) at Sparkable

October 1, 2025 - Present

Contributed to a social content platform (sparkable.cc), improving workflow efficiency and database structure to boost performance. Supported feature development, debugging, and continuous platform improvements while collaborating with cross-functional teams to deliver scalable, user-focused solutions.

Bubble.io Developer (Freelance) at G-AIM Consulting

September 1, 2023 - Present

Developed and maintained Bubble.io applications for international clients across multiple industries. Designed scalable database architectures and implemented complex business workflows. Integrated third-party APIs, automated processes, and extended platform capabilities with Node.js-based backend services when needed. Optimized performance and delivered end-to-end solutions from concept to deployment.

Bubble.io Developer (Full-Time) at Seleby Inc., Japan

January 1, 2024 - January 1, 2026

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 for high user activity and concurrency. 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

February 1, 2021 - December 1, 2022

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

January 1, 2021 - Present

Delivered end-to-end Bubble.io and hybrid (no-code + Node.js) solutions for global clients. 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.