KR
KevinRomario.com
Open to new opportunities

Crafting High-Performance
Web

5 years of experience building high-quality, high-performance digital products. Open to collaborations and new opportunities in the global technology industry.

Next.js
React
TypeScript
5+Years Experience
Developer Profile
Available for freelance
About Me

Where Business Logic Meets Clean Code

My professional journey began in the banking and FMCG sectors, where my finance background and marketing experience shaped my product perspective. After pivoting my career through Purwadhika, I now dedicate my expertise to building scalable, high-performance front-end architectures. For me, product development is not just about utilizing the latest technology; it’s about finding the balance between technical efficiency and achieving tangible business goals to drive profitability and user satisfaction.

With five years of experience, I specialize in building modern web applications within the JavaScript and TypeScript ecosystems. Specifically, I leverage React and Next.js to create digital solutions that are fast, accessible, and maintainable through clean code. I believe that combining mature business logic with the right technical mastery is the key to delivering successful digital products in the global market.

Based in Yogyakarta, Indonesia.

Outside the Terminal

Precision Tracking & Maintenance

I pay meticulous attention to detail and data accuracy, from tracking my personal finances to monitoring vehicle maintenance schedules to ensure peak performance. For me, maintaining organized systems offline is just as satisfying as optimizing code performance: it is all about efficiency and precision.

Fitness & Training

Consistent training keeps my mind sharp and my energy high. Discipline in the gym transfers directly to discipline in code.

Coffee Exploration

A good cup of pour-over is a ritual. Yogyakarta has a thriving specialty coffee scene and I've made it my mission to explore it.

Experience

Career Journey

Frontend Engineer

Current
Aug 2025 — Present
Remote, Indonesia

Contributed to the development and maintenance of Clicky.id using Next.js and Material UI, ensuring scalable and maintainable frontend architecture. Built responsive and accessible UI components to deliver a seamless user experience across desktop and mobile devices.

  • Collaborated closely with backend engineers to integrate APIs efficiently and ensure smooth data flow
  • Worked alongside designers to maintain UI/UX consistency and implement pixel-accurate interfaces
  • Ensured scalable and maintainable frontend architecture for Clicky.id
ReactNext.jsJavaScriptMaterial UIGitHub
Sep 2021 — May 2025
Yogyakarta, Indonesia

Contributed to the development and maintenance of multiple web and mobile applications across organizational transitions (GoTo Logistics to ByteDance). Delivered new features and improved system reliability for Warehouse Management and Workforce Management platforms.

  • Optimized the Integrated Business Planning application, reducing operational workload by approximately 10 hours per analyst per week
  • Maintained and enhanced the official logistics website, including resolving spam issues on the tracking page
  • Ensured stable and scalable frontend solutions during major organizational transitions
ReactReact NativeExpoModern.jsNext.jsTypeScriptChakra UIXState

Full-stack Engineer

Jul 2021 — Sep 2021
Jakarta, Indonesia

Contributed to the development of the company's investment crowdfunding platform, building core frontend features using JavaScript and Next.js.

  • Collaborated on backend integration using Express.js to ensure seamless data flow and reliable platform functionality
  • Supported the delivery of a responsive and user-friendly web experience aligned with regulatory requirements
  • Developed core features using Next.js for a crowdfunding sector startup
Next.jsExpress.jsTypeScriptBootstrapMySQL

Frontend Engineer

Fast8 Group·Full-time
Feb 2021 — Jun 2021
Jakarta, Indonesia

Contributed to the ongoing development of the Gadjian web and mobile applications, delivering new features aligned with workforce management needs.

  • Identified and resolved bugs to improve system stability and ensure a smooth user experience across platforms
  • Maintained and enhanced application performance to support reliable employee attendance and HR management
  • Built cross-platform features using React and React Native
ReactReact NativeJavaScriptBootstrapGitHub
Skills

Technical Expertise

Core Languages

JavaScript

ES2024, async/await, closures

TypeScript

Generics, utility types, strict mode

HTML / CSS

Semantic, accessibility-first

Frameworks & Libraries

Next.js

App Router, SSG, ISR, Server Actions

React

Hooks, Context, React 19

Express.js

RESTful APIs, Middleware, Node.js

Tailwind CSS

v3/v4, design systems, tokens

Tools & Infrastructure

Docker

Containerization, Docker Compose

Git / GitHub

CI/CD, GitHub Actions, branching

Figma

Design-to-code, components, tokens

PostgreSQL

Query optimization, schema design

Also familiar with

ViteRedux ToolkitReact QueryStorybookVitestPlaywrightVercelGraphQLREST APIs
Contact

Let's Build Something Together

Have a project in mind or want to discuss an opportunity? I'm currently open to freelance work and full-time roles. Drop me a message and I'll get back to you within 24 hours.

Location

Yogyakarta, Indonesia

Timezone

WIB (UTC+7)

Response time

Within 24 hours

holakevinromario@gmail.com