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Hi, I'm Yosaphat Harwindra Jayacitna Prasetya, a frontend software engineer based in Surakarta, Indonesia. I specialize in building production-grade React applications for enterprise environments, with a focus on real-time and visualization-heavy UIs, performance, maintainability, and reliability within Agile/Scrum teams.\n\nI enjoy collaborating with cross-functional teams to translate complex requirements into scalable UI solutions, integrate third-party APIs, and optimize rendering. I'm comfortable with modern tooling, TDD, and writing clean, reusable components to deliver robust, user-friendly interfaces across platforms.…Hi, I'm Yosaphat Harwindra Jayacitna Prasetya, a frontend software engineer based in Surakarta, Indonesia. I specialize in building production-grade React applications for enterprise environments, with a focus on real-time and visualization-heavy UIs, performance, maintainability, and reliability within Agile/Scrum teams.\n\nI enjoy collaborating with cross-functional teams to translate complex requirements into scalable UI solutions, integrate third-party APIs, and optimize rendering. I'm comfortable with modern tooling, TDD, and writing clean, reusable components to deliver robust, user-friendly interfaces across platforms.

Yosaphat Harwindra Jayacitna Prasetya

Front-End Developer, Full Stack Developer, Web Developer, +2

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Hi, I'm Yosaphat Harwindra Jayacitna Prasetya, a frontend software engineer based in Surakarta, Indonesia. I specialize in building production-grade React applications for enterprise environments, with a focus on real-time and visualization-heavy UIs, performance, maintainability, and reliability within Agile/Scrum teams.\n\nI enjoy collaborating with cross-functional teams to translate complex requirements into scalable UI solutions, integrate third-party APIs, and optimize rendering. I'm comfortable with modern tooling, TDD, and writing clean, reusable components to deliver robust, user-friendly interfaces across platforms.…Hi, I'm Yosaphat Harwindra Jayacitna Prasetya, a frontend software engineer based in Surakarta, Indonesia. I specialize in building production-grade React applications for enterprise environments, with a focus on real-time and visualization-heavy UIs, performance, maintainability, and reliability within Agile/Scrum teams.\n\nI enjoy collaborating with cross-functional teams to translate complex requirements into scalable UI solutions, integrate third-party APIs, and optimize rendering. I'm comfortable with modern tooling, TDD, and writing clean, reusable components to deliver robust, user-friendly interfaces across platforms.

Available to hire

Hi, I’m Yosaphat Harwindra Jayacitna Prasetya, a frontend software engineer based in Surakarta, Indonesia. I specialize in building production-grade React applications for enterprise environments, with a focus on real-time and visualization-heavy UIs, performance, maintainability, and reliability within Agile/Scrum teams.\n\nI enjoy collaborating with cross-functional teams to translate complex requirements into scalable UI solutions, integrate third-party APIs, and optimize rendering. I’m comfortable with modern tooling, TDD, and writing clean, reusable components to deliver robust, user-friendly interfaces across platforms.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

Indonesian

Fluent

English

Advanced

Work Experience

Frontend Software Engineer at Formulatrix

July 1, 2024 - Present

Maintained the Rover frontend UI, a real-time visualization system supporting laboratory automation workflows in production. Developed and optimized a React application built with Vite, enhanced Three.js for interactive robotic fleet visualization, and integrated SignalR for real-time data streaming. Delivered hotfixes, investigated UI bugs under stabilization conditions, and improved rendering performance, state consistency, and maintainability. Wrote unit tests using Jest and participated in Agile/Scrum ceremonies; documented feature architecture and collaborated with UX designers to ensure alignment with business objectives.

Frontend Engineer at Formulatrix

December 1, 2024 - May 1, 2025

Project: Fmlx Common UI. Contributed to developing scalable, reusable UI components, including pagination and collapsible tables; modularized core components for maintainability and cross-project integration. Enhanced data visualization with loaders/backdrop components; authored unit tests to ensure component robustness; documented development from item start to MVP; collaborated with cross-functional teams to align UI with business objectives.

Frontend Engineer Intern at Formulatrix

July 1, 2024 - November 1, 2024

Project: Internal Web Application (ESS). Built user-friendly, responsive interfaces with React; enhanced reusable components and data handling; integrated News API and JWT authentication; developed RBAC and session management; implemented robust error handling for user interactions.

Fullstack Software Engineer at Revou (Revou U)

October 1, 2023 - April 1, 2024

Monitored application performance, debugged issues, and optimized performance for improved user experience. Developed and deployed full-stack applications using JavaScript, React, and PostgreSQL; collaborated with cross-functional teams to design software solutions meeting project objectives; utilized Git for version control; integrated third-party APIs to extend functionality and user experience.

Fullstack Engineer at Revou Faculty Project

September 1, 2021 - November 1, 2021

Final Project: Tech for Village website. Developed user-friendly, responsive web interfaces using React; ensured cross-device accessibility; integrated News API and JWT authentication; implemented error handling and form validation using React Hook Form and Zod.