Futuristic Interfaces8+ Years ShippingKotlin · React Native · React.js · Nest.js

KHAMDAN NAHARI

Full Stack Engineer (Mobile and Web) — 8+ Years Experience

Full Stack Engineer with 8 years of experience, specializing in Kotlin, React Native, React.js, and Nest.js. Experienced in building efficient, scalable, and user-friendly applications.

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Years

8+

Mobile & web delivery experience

Products

15

Apps & websites launched

Growth

13.5M

Monthly active users impacted

Phone

+62 852 2028 2844

Email

khamdannahari.id@gmail.com

About

Crafting future-ready mobile & web experiences

Full Stack Engineer with 8 years of experience, specializing in Kotlin, React Native, React.js, and Nest.js. Experienced in building efficient, scalable, and user-friendly applications.

Committed to engineering excellence and product craftsmanship, turning complex problems into elegant, scalable solutions.

AI initiatives

Designed AI-powered chat tools for creators at Collabreate.

Telco scale

Built Smartfren Digital Outlet + MySmartfren experiences powering nationwide commerce.

Learning impact

Boosted Ruangguru engagement with live teaching, consultations, and gamification.

Skills

Immersive skill

A comprehensive technical toolkit spanning mobile development, modern web frameworks, and scalable backend architecture.

Android Native

KotlinJavaAndroid SDKJetpack ComposeCoroutinesRxJavaRetrofitRoomKoinDagger/HiltJUnitMockito

Mobile Cross-Platform

React NativeExpoJavaScriptTypeScriptAxios

Frontend Web

React.jsNext.jsCSSTailwind CSSHTMLRedux

Backend

PostgreSQL, Nest.jsPrisma ORMNeon DBSupabase

Architecture & Ops

AWSOOPSOLIDClean ArchitectureJenkinsGit

Experience

Impact timeline

AI-native products, telco platforms, and education apps engineered with motion, accessibility, and measurable results.

Apr 2025 — Present

Full Stack Engineer (Mobile and Web)

Collabreate • Singapore (Remote)

Remote

Building AI-powered products for creators and agencies with a focus on resilient frontends and scalable backend services.

  • Building an AI-powered chat app that simplifies content uploads, analytics, and cross-platform messaging, helping content creators work faster and more efficiently.
  • Building the Cliqo landing page, improving brand presence and increasing user sign-ups.
  • Developing the Tax Elevate website with a faster, cleaner UI, boosting SEO and client lead generation.
  • Managing and maintaining AWS services such as EC2 and Elastic Beanstalk, ensuring efficient deployment, scalability, and security of applications.

Sep 2023 — Apr 2025

Senior Frontend Engineer (Mobile and Web)

Smartfren • Jakarta (Onsite)

Onsite

Drove the digital commerce surfaces that power large-scale voucher and product distribution for Smartfren.

  • Built the Digital Outlet website serving nationwide product and voucher launches.
  • Resolved critical incidents across internal sales apps to restore operational velocity.
  • Developed a Content Management System (CMS) to manage content for electricity providers (PLN), regional water companies (PDAM), and game vouchers, enhancing and streamlining content delivery processes.
  • Shipped a personalized home screen widget that raised retention.

Jan 2023 — Aug 2023

Android Developer

XL Axiata • Jakarta (Remote)

Remote

Scaled payment integrations and performance for AXISnet and supporting Android apps.

  • Integrated ShopeePay, GoPay, and DANA to unlock new transaction funnels.
  • Improved AXISnet code quality through reviews and engineering seminars.
  • Cut build time in half with modularization and CI optimization.
  • Helped grow monthly active users from 12M to 13.5M.

Jun 2021 — Nov 2022

Android Developer

Ruangguru • Jakarta (Remote)

Remote

Built learning experiences that increased engagement for millions of students.

  • Launched live teaching, pretest, and consultation flows to boost weekly active users by 7.3%.
  • Led the migration to React Native, saving 50% of engineering resources.
  • Introduced gamification layers that drove stickier learning habits.

Sep 2020 — May 2021

Android Developer

Qasir • Jakarta (Remote)

Remote

Boosted the POS platform with localization and better engineering practices.

  • Authored onboarding playbooks and documentation for faster ramp-up.
  • Added language and currency localization to accelerate market expansion.
  • Partnered with product and architecture teams on scalable patterns.

Apr 2020 — Aug 2020

Android Developer

Solusi Digital • Jakarta (Remote)

Remote

Created mobility features for logistics and accessibility products.

  • Built a driver tracking map powered by Firebase and Google Maps.
  • Shipped audiobook functionality with ExoPlayer.
  • Collaborated closely with product teams to align delivery with user journeys.

Oct 2018 — Mar 2020

Android Developer

Olsera • Yogyakarta (Onsite)

Onsite

Built reservation and retail tooling for beauty and fitness businesses.

  • Created scheduling and reservation flows used by premium studios.
  • Implemented barcode scanning with ZXing for faster checkout.
  • Continuously refined product usability through rapid experimentation.

Projects

Full delivery grid

Product launches across AI, fintech, telco, and learning—each crafted with obsessively polished frontends and resilient code.

Mobile 2025

Cliqo App

AI-powered chat companion that centralizes content uploads, analytics, and creator messaging.

React Native · Nest.js

Extended creator productivity with multimodal AI workflows and faster iteration loops.
Web 2025

Cliqo Landing Page

High-converting marketing site for Cliqo with cinematic storytelling and instant load states.

Next.js · TypeScript

Lifted sign-up conversions through GSAP-driven hero moments and SEO-first architecture.
Web 2025

Tax Elevate Website

SEO-optimized marketing site for a tax advisory collective with dynamic case study modules.

Next.js

Improved Core Web Vitals, organic traffic, and inbound leads for the business team.
Web 2024

Digital Outlet Web

National sales website for Smartfren's large-scale product and voucher drops.

Next.js

Delivered resilient commerce flows that handle high-traffic launches.

Web 2024

PPOB CMS Website

Partner-integrated Content Management System (CMS) managing content pipelines for electricity providers (PLN), regional water utilities (PDAM), and game vouchers.

React.js

Unified partner workflows with better visibility and faster publishing.

Mobile 2023

AXISnet App

Android experience for AXIS subscribers with modularized architecture.

Kotlin

Cut build times dramatically while supporting MAU growth from 12M to 13.5M.
Mobile 2023

MySmartfren App

Cellular self-service app modernized with new engagement surfaces.

React Native

Raised retention and simplified bundle purchases for millions of users.

Mobile 2023

SGS App

Productivity toolkit for gadget specialists managing in-store activations.

Kotlin

Equipped specialists with live inventory and campaign guidance on Android.

Mobile 2023

SRIS App

Retail system experience for merchandising teams.

React Native

Improved store visit coverage and decision-making with real-time data.

Mobile 2023

STS App

Sales tracking enhancements for frontline teams.

Kotlin

Streamlined reporting loops and helped the team prioritize high-value leads.

Mobile 2021

Ruangguru

Comprehensive learning platform with live classes, pretests, and consultations.

Kotlin · React Native

Unlocked gamification loops that boosted weekly active students.

Mobile 2020

Ahabaca App

Audiobook application designed for accessibility-first learning.

Kotlin

Delivered narrated content to communities with limited reading access.

Mobile 2020

Labbaik Chicken App

Restaurant ordering experience tailored for franchise operations.

Kotlin

Enabled branded loyalty flows and faster in-store fulfillment.

Mobile 2020

Qasir App

Point-of-sale application powering SMB merchants.

Kotlin

Added localization layers that accelerated expansion across regions.
Mobile 2018

Zenwel Biz App

Reservation platform for premium beauty and fitness businesses.

Kotlin

Rolled out booking, inventory, and loyalty experiences for boutique brands.

Achievement

Winner — Indosat Ooredoo Digital Camp Challenge

Indosat Ooredoo

Awarded first place for building production-ready digital experiences under extreme time constraints.

Volunteer

Kotlin Facilitator

Google Developers Kejar

Mentored aspiring Android engineers through hands-on Kotlin workshops.

Education

Foundations

UIN Sunan Kalijaga, Yogyakarta

Bachelor of Computer Science

2016 – 2020
  • Graduated with GPA 3.40 / 4.00 under the Full Bidikmisi Scholarship.
  • Built an audiobook app for people with disabilities through Google Developer Student Club.

Contact

Collaborate on the next build

Ready for AI-native apps, premium marketing sites, or large-scale telco experiences. Let’s build the next standout release.

+6285220282844
khamdannahari.id@gmail.com
Email Me
Book a Call
My Resume