I’m Yos, a Front-End Developer based in Malang

I build company websites and product front ends, then stay through launch. Recent work includes Symson and Alumio in the Netherlands, Webflow sites, and freelance full-stack builds in React, Next.js, Svelte, Node.js, and Laravel.

Introduction

About Me

Meet Yos

Front-end and full-stack developer with over five years delivering websites and mobile apps for companies in the Netherlands, the USA, and Indonesia. I built product front ends at Symson and Alumio, led the front end of Bank Mayapada’s banking app, and took Alumio’s company site to a page speed score of 98.

Contact Me Download CV
Portrait of Andrean Yos Saputra
5 +
Years shipping websites and apps
98
Page speed score on Alumio’s company site
3
Markets: the Netherlands, the USA, and Indonesia
UTC+7
Based in Malang, East Java

Latest Works

Websites I've built.

Experience

Work history

  1. Full-Stack Web Developer

    Freelance (Self-employed) · Indonesia

    08/2020 – Present

    • Deliver responsive full-stack web applications from design through maintenance, using JavaScript, React, Node.js, and Express.
    • Build and maintain the REST APIs that connect the front end with back-end systems.
    • Integrate MongoDB and MySQL, and tune queries and database structure for performance and scale.
    • Ship user-centered front ends in React and Vue.js with cross-functional teams.
    • Deploy Node.js and Express applications with secure handling of requests and data.

  2. Front-End Developer

    Symson · Rotterdam, Netherlands

    11/2023 – 05/2026

    • Kept the live website stable and fast with a seven-person team.
    • Turned Figma prototypes into a sales page aimed at raising engagement.
    • Built an ROI calculator with jQuery and Airtable so clients can quantify the value of the service.
    • Created the scroll animation on the Algorithm page at symson.com.
    • Introduced Tailwind CSS so the pages share one design language.

  3. Webflow Developer

    Paired Recruiting (Freelance) · USA

    02/2023 – 10/2023

    • Redesigned and rebuilt the homepage in Webflow as the freelance developer on the project.
    • Structured a Webflow CMS so the team can update content on their own.
    • Delivered a responsive homepage consistent with the brand.
    • Built custom Webflow interactions and animations for the homepage.

  4. Front-End Developer

    Alumio · Groningen, Netherlands

    02/2022 – 10/2023

    • Built the front end of the Integration Platform as a Service product with React, Next.js, and Node.js in a twelve-person team.
    • Led the company website and took it to a page speed score of 98.
    • Designed and built a responsive Webflow landing page aligned with the brand.
    • Added interactive elements in JavaScript and jQuery.

  5. Mobile Developer

    PT. Infosys Solusi Terpadu · Yogyakarta, Indonesia

    12/2020 – 05/2021

    • Led front-end development of Bank Mayapada’s customer banking application, built with Temenos Kony.
    • Worked in a twelve-person team with back-end developers and business analysts on the functional and non-functional requirements.
    • Applied user-centered design so the application is straightforward to use and navigate.

  6. Front-End Web Developer (Internship)

    PT Finnet Indonesia · Jakarta, Indonesia

    07/2019 – 10/2019

    • Delivered the front end of the corporate dashboard website during a three-month internship.
    • Built a Laravel front end that lets users access and visualize data from multiple sources.
    • Created a responsive CSS and JavaScript interface across devices.

How the work runs

You talk to the maker.

Notes from the work at Symson, Alumio, and Paired Recruiting. Written in my own words.

A Figma file is not the site.

At Symson, prototypes became a sales page, and the live site still had to stay stable after that handoff.

[1] Andrean Yos Front-End Developer, Malang

I ship the site myself.Tell me the page’s job.

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