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Hi, I’m Glen Paul Sumido, a Senior Frontend Developer with 8+ years of experience building scalable web applications using React and modern JavaScript frameworks. I have a proven track record delivering high-quality, secure solutions in Agile environments and across cross-functional teams. I excel at REST API integration, automated testing, and performance optimization, and I love collaborating with UX designers and Product Owners to craft tailored user experiences.…Hi, I’m Glen Paul Sumido, a Senior Frontend Developer with 8+ years of experience building scalable web applications using React and modern JavaScript frameworks. I have a proven track record delivering high-quality, secure solutions in Agile environments and across cross-functional teams. I excel at REST API integration, automated testing, and performance optimization, and I love collaborating with UX designers and Product Owners to craft tailored user experiences.

Glen Paul Sumido

Web Developer, Front-End Developer, Back-End Developer, +4

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Hi, I’m Glen Paul Sumido, a Senior Frontend Developer with 8+ years of experience building scalable web applications using React and modern JavaScript frameworks. I have a proven track record delivering high-quality, secure solutions in Agile environments and across cross-functional teams. I excel at REST API integration, automated testing, and performance optimization, and I love collaborating with UX designers and Product Owners to craft tailored user experiences.…Hi, I’m Glen Paul Sumido, a Senior Frontend Developer with 8+ years of experience building scalable web applications using React and modern JavaScript frameworks. I have a proven track record delivering high-quality, secure solutions in Agile environments and across cross-functional teams. I excel at REST API integration, automated testing, and performance optimization, and I love collaborating with UX designers and Product Owners to craft tailored user experiences.

Available to hire

Hi, I’m Glen Paul Sumido, a Senior Frontend Developer with 8+ years of experience building scalable web applications using React and modern JavaScript frameworks.

I have a proven track record delivering high-quality, secure solutions in Agile environments and across cross-functional teams. I excel at REST API integration, automated testing, and performance optimization, and I love collaborating with UX designers and Product Owners to craft tailored user experiences.

Skills

Experience Level

Expert

Expert

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Expert

Expert

Expert

Expert

Expert

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Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Senior Software Developer at Helika

June 1, 2023 - February 1, 2026

Led development of enterprise SaaS web applications with complex data visualization and dashboard interfaces. Built responsive, performant UIs integrated with backend APIs, focusing on reliability and seamless user experience. Collaborated with product stakeholders to translate requirements and wireframes into production-ready features. Maintained scalability and code quality across critical user flows through reviews, testing, and documentation.

Frontend Developer at Refmint

February 1, 2022 - June 1, 2023

Designed and built data-heavy React applications with emphasis on performance optimization. Implemented lazy loading and caching strategies, improving page load times by 40%. Designed and maintained reusable UI components used across internal and customer applications. Automated build pipelines with CI/CD for streamlined deployments.

Front End Developer at Refmint

February 1, 2022 - June 1, 2023

Designed and implemented React and Next.js web applications focusing on user experience. Optimized page load times and interactivity for complex data views through lazy loading and caching strategies. Worked directly with product and QA in an agile environment, adapting quickly to shifting requirements and briefs.

Data Scientist / Front-End Developer at People Insight

April 1, 2017 - January 1, 2022

Built interactive dashboards for enterprise HR analytics using React and modern frameworks. Developed survey-driven data collection workflows with validation logic and automated testing. Collaborated with UX designers to translate complex requirements into intuitive user interfaces. Implemented automated data processing pipelines, reducing manual effort and improving data quality.

Data Scientist at People Insight

April 1, 2017 - January 1, 2022

Built interactive dashboards for enterprise HR analytics, surfacing workforce insights for business stakeholders. Designed survey-driven data collection workflows and implemented scoring/validation logic for HR metrics. Translated complex client requirements into actionable solutions across both technical and non-technical teams.