Jonnathan Duvan Luis Ceballos Full-Stack Developer & UI/UX Designer

Full Stack Developer & UI/UX Designer

Melora Connect

Oct 2026 - Current (1 month)

• Design wireframes and high-fidelity page designs for the web and mobile experiences of an association management software (AMS) platform.
• Translate product requirements into user flows and screens that developers can implement directly.
• Collaborated on bringing deep agents into the team's development workflow.

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Full Stack Developer — Co-Founder

CloudeMed

Aug 2026 - Current (3 months)

• Building a multi-tenant SaaS platform for dental practices covering electronic health records, patient scheduling, billing and clinic administration.
• Designing the multi-tenant data model so each clinic's data stays isolated as the platform grows from one practice to many.
• Leading the frontend in React and Next.js, and the UX/UI for dentists, receptionists and administrators.
Tech: React, Next.js, TypeScript, Node.js, PostgreSQL, AWS (ECS, S3, CloudFront), Docker, Figma

Full Stack Developer — Internship

Universidad Icesi

Jun 2026 - Jul 2026 (2 months)

• Designed and built an application for the Phoenix program that lets students with academic difficulties set weekly goals and tasks, with export to Excel or PNG to share with advisors.
• Owned the feature end to end, from UX flows and data modeling to the export pipeline, iterating with academic staff to match real advising workflows.
Tech: React, TypeScript, Node.js, Firebase, PostgreSQL, REST APIs

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Software Engineer — Co-Founder (Freelance)

OGX

Feb 2026 - Jun 2026 (5 months)

• Co-founded a two-person software development and data management company with a university classmate.
• Delivered Wantme, an e-commerce platform, and the corporate website for JGMC, managing each project from discovery and design through development and deployment.
• Set up shared engineering standards (code review, deployment pipelines, hosting) to deliver client work consistently.
Tech: React, Next.js, Node.js, Tailwind CSS, AWS (S3, CloudFront, DynamoDB), Git

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Software Engineer (Freelance)

QueryApp

Sep 2025 - Jan 2026 (5 months)

• Built a lead-generation tool that helps entrepreneurs find potential clients using official Google APIs and configurable search filters.
• Designed a lead-scoring layer that classifies prospects as high, medium or zero probability of conversion and exports them to a ready-to-use Excel sheet.
• Handled the project independently, from requirements and API integration to delivery for non-technical clients.
Tech: Python, Google Places/Maps APIs, Pandas, PostgreSQL

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QuantEdge Trading Systems — Personal Project

Jul 2025 - Aug 2025 (2 months)

• Implemented and backtested rule-based trading strategies in MQL4/MQL5 for MetaTrader against historical market data.
• Built a Python backtesting and analytics pipeline, plus an AWS Lambda job that monitors live signals.
Tech: Python, MQL4/MQL5, Pandas, AWS Lambda, PostgreSQL

Full Stack Programmer — Internship

PRODUCTOS RAMO S.A.

Feb 2025 - Jun 2025 (5 months)

• Built an e-commerce platform for the main university campuses of Cali, addressing unauthorized vendors and improving the connection between customers and vendors.
• Developed the frontend in React and Next.js with reusable components for future campus deployments, and deployed the application on AWS.
Tech: React, Next.js, Node.js, AWS (EC2, S3), PostgreSQL, REST APIs

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Web Developer (Freelance Projects)

La Primavera

Jun 2023 - Aug 2026 (3 years 3 months)

Collaborated on small projects with various companies, utilizing WordPress to deliver web solutions.

UX/UI Designer

Universidad Icesi

Jan 2022 - May 2023 (1 year 5 months)

Work as a UX/UI designer, utilizing the full Adobe suite and possessing advanced Figma skills, capable of creating high-level prototypes. Applied web accessibility principles across various projects as an Interactive Media Design student.

Jonnathan Duvan Luis Ceballos

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Jonnathan Duvan Luis Ceballos

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