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Yosaphat Harwindra

@yosaphatharwindra

Frontend Engineer at Formulatrix who improved laboratory automation reliability and maintained a real-time robotic fleet visualisation platform.

Indonesia

Message

What I'm looking for

I’m actively expanding into backend and systems engineering.

At Formulatrix, I improved the reliability of laboratory automation workflows by applying strict TypeScript and a modular component architecture, reducing the production bug rate by about 30%.

I maintained the Rover real-time robotic fleet visualisation platform, sustaining 99%+ uptime. I worked on React, Three.js, and SignalR integrations under high-frequency WebSocket data loads, and optimized scene updates to sustain 60 fps.

I designed the Fmlx Common UI shared component library, helping reduce duplicated component code by about 40% across internal products. I also wrote Jest and React Testing Library suites, reaching 86% coverage for the library.

On the ESS portal, I implemented JWT-based authentication and role-based access control, and built reusable components for HR and admin workflows. I’m actively expanding into backend and systems engineering.

Experience

Work history, roles, and key accomplishments

Frontend Software Engineer

Formulatrix

Jul 2024 - May 2026 (1 year 10 months)

Increased feature delivery reliability for laboratory automation workflows, reducing production bug rate by ~30% by enforcing TypeScript strict mode and modular component architecture. Sustained 99%+ uptime for a real-time visualisation platform and improved release confidence by increasing unit test coverage by ~35%.

React TypeScript ThreeJS SignalR WebSockets Redux Jest React Testing Library Agile Scrum

Education

Degrees, certifications, and relevant coursework

RevoU

Fullstack Software Engineering Program, Software Engineering

2023 - 2024

Completed a fullstack software engineering program, shipping a full-stack project using React, Python, Flask, SQLAlchemy, and PostgreSQL in a team-based sprint-driven workflow.