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I am a Software Developer with 3 years of experience creating secure and reliable web applications using a wide range of technologies including C#, PHP, Java, JavaScript, React, HTML/CSS, Sass, Express.js, and Node.js. I am proficient in database management with MySQL, PostgreSQL, MongoDB and DynamoDB, and skilled in version control with Git. I pride myself on writing high-quality, well-tested code and enjoy collaborating closely with cross-functional teams to deliver customer-focused solutions. Passionate about continuous learning and improving software performance and security, I thrive in agile environments and have a proven track record of launching successful web applications that enhance user experience and business profitability.…I am a Software Developer with 3 years of experience creating secure and reliable web applications using a wide range of technologies including C#, PHP, Java, JavaScript, React, HTML/CSS, Sass, Express.js, and Node.js. I am proficient in database management with MySQL, PostgreSQL, MongoDB and DynamoDB, and skilled in version control with Git. I pride myself on writing high-quality, well-tested code and enjoy collaborating closely with cross-functional teams to deliver customer-focused solutions. Passionate about continuous learning and improving software performance and security, I thrive in agile environments and have a proven track record of launching successful web applications that enhance user experience and business profitability.

Jaime Villanua De Juan

Full Stack Developer, Web Developer, Programmer, +1

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I am a Software Developer with 3 years of experience creating secure and reliable web applications using a wide range of technologies including C#, PHP, Java, JavaScript, React, HTML/CSS, Sass, Express.js, and Node.js. I am proficient in database management with MySQL, PostgreSQL, MongoDB and DynamoDB, and skilled in version control with Git. I pride myself on writing high-quality, well-tested code and enjoy collaborating closely with cross-functional teams to deliver customer-focused solutions. Passionate about continuous learning and improving software performance and security, I thrive in agile environments and have a proven track record of launching successful web applications that enhance user experience and business profitability.…I am a Software Developer with 3 years of experience creating secure and reliable web applications using a wide range of technologies including C#, PHP, Java, JavaScript, React, HTML/CSS, Sass, Express.js, and Node.js. I am proficient in database management with MySQL, PostgreSQL, MongoDB and DynamoDB, and skilled in version control with Git. I pride myself on writing high-quality, well-tested code and enjoy collaborating closely with cross-functional teams to deliver customer-focused solutions. Passionate about continuous learning and improving software performance and security, I thrive in agile environments and have a proven track record of launching successful web applications that enhance user experience and business profitability.

Available to hire

I am a Software Developer with 3 years of experience creating secure and reliable web applications using a wide range of technologies including C#, PHP, Java, JavaScript, React, HTML/CSS, Sass, Express.js, and Node.js. I am proficient in database management with MySQL, PostgreSQL, MongoDB and DynamoDB, and skilled in version control with Git. I pride myself on writing high-quality, well-tested code and enjoy collaborating closely with cross-functional teams to deliver customer-focused solutions. Passionate about continuous learning and improving software performance and security, I thrive in agile environments and have a proven track record of launching successful web applications that enhance user experience and business profitability.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Spanish; Castilian

Fluent

French

Fluent

Work Experience

Junior Full Stack Developer at Umee

March 1, 2025 - August 22, 2025

Implemented the app’s MVC architecture production build, including a file caching system to organize user data such as image galleries, profile pictures, and chat history, integrating AWS S3 for data retrieval. Designed and implemented a data security encryption system following Apple’s guidelines using Keychain for secure storage. Conducted user beta testing focusing on security, accessibility, and performance using Flutter, Dart, Kotlin, Pub, and Linux/Bash.

Software Developer at Umee

December 18, 2024 - March 20, 2025

Worked on the app’s MVC architecture production build, implementing a file caching system to organize user data including image gallery, profile pictures, and chat history, integrating AWS S3 for data retrieval. Designed and implemented a data security encryption system compliant with Apple’s guidelines using Keychain for secure storage, and conducted isolated user beta testing to ensure security, accessibility, and performance using Flutter, Dart, Kotlin, Pub, and Linux/Bash.

Junior Full Stack Developer at PayShepherd

October 1, 2023 - August 22, 2025

Collaborated in a startup-like environment troubleshooting and debugging on contractor and vendor portals for reliability and maintainability using PHP, JIRA, Agile, SQL, Git, HTML, Confluence, JavaScript, Docker, CSS, jQuery, BitBucket, and MySQL. Developed new user interface features leading development lifecycle within an Agile framework, resolving frontend cross-browser and device issues with an emphasis on performance and usability in collaboration with design, product management, and QA.

Junior Full Stack Developer at Vocal Resony

October 1, 2023 - Present

Designed and developed the front-end of the company’s web app using Scrum methodology with Figma, React, JavaScript, Framer Motion, HTML, and Sass. Managed the website launch project using JIRA, achieving a 400% profit margin over estimates. Built the back-end services including an e-commerce store using JavaScript, SQL, and Node.js, integrating PayPal’s API for payments and Firebase for authentication and hosting, incorporating cloud functions to verify payments.

Software Developer at Vocal Resony

October 1, 2023 - Present

Designed and developed a front-end design with a high-quality user interface for the company’s web app following Agile principles using Figma, React, JavaScript, Framer Motion, HTML, and Sass. Managed the website’s launch project using Jira, resulting in a 400% increase in average profit margin in the first year. Built the backend services app with an integrated e-commerce store using JavaScript, SQL, and Node.js, integrating PayPal API for payment gateway and Firebase for authentication and NoSQL database hosting. Hosted and integrated cloud functions for payment verification in the store.

Software Developer at PayShepherd

July 17, 2023 - October 9, 2023

Collaboratively worked in a dynamic startup-like environment troubleshooting and debugging the contractor and vendor portal views using PHP, JIRA, Agile methodologies, SQL, Git, HTML, JavaScript, Docker, CSS, jQuery, BitBucket, and MySQL. Developed new user interface features to optimize performance and scalability while coordinating with design, product, engineering, and QA teams to ensure comprehensive testing coverage.

Junior Full Stack Developer at JAMES V

July 1, 2023 - August 22, 2025

Led a team of 2 full stack developers to increase SEO by 90% bringing the brand’s website to top 1 on Google Search. Delivered 20 custom features by utilizing Figma, React, HTML, CSS Modules, Node.js, Firebase, and JavaScript in a hybrid Scrum environment. Released the 2.0 web app version integrating PayPal Business subscriptions, which boosted NPS by 85% and gross profit margin by 120% over the last year.

Software Developer at JAMES V

July 1, 2023 - August 4, 2025

Led a team of 2 full stack developers to launch the brand's website, increasing SEO by 90% and achieving top 1 Google Search ranking. Developed a high-quality front-end with Figma, React, HTML, and CSS and a robust backend with Node.js, Firebase, and JavaScript. Utilized Jira and Agile methodologies working in a hybrid environment to deliver 20 custom features successfully. Released version 2.0 with PayPal Business subscriptions integration leading to an 85% NPS increase and 120% growth in gross profit margin over the year.

QA Analyst at Tesgo Inc

August 1, 2020 - August 22, 2025

Performed six usability reports for the company’s web testing services during beta development alongside a Senior Full Stack Developer. Achieved a 98% Customer Satisfaction Score (CSS) for the app. Contributed to strategic planning for enterprise market positioning aligning with the company’s five-year vision and participated actively in developing the firm’s business plan.

Software Developer at Tesgo Inc

May 11, 2020 - August 29, 2020

● Performed 6 usability reports for the company's web testing services during the beta testing development phase, working along with a Senior Full Stack Developer, which translated into a result of 98% of Customer Satisfaction Score (CSS) when testing the app. ● Contributed to strategic decision-making regarding the enterprise's market positioning aligned with the company’s long-term vision by actively participating in the development of the firm’s business plan for the upcoming 5 years.