Enkh-Erdene Bolormaa

I was born and raised in Ulaanbaatar, Mongolia. I enjoy exploring modern technologies, continuously learning new things, and building applications that solve real problems.

I'm a front-end developer with 9 years of experience building web and mobile applications. I primarily work with HTML, CSS, JavaScript, and TypeScript, and enjoy using modern frameworks and configuring CI/CD pipelines to improve the development experience.

Experience

  • Zero Technology

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    Senior Software Engineer

    • APU Dairy — Full-stack dairy supply chain management system (Turborepo monorepo)

      • Built the admin dashboard with React, Mantine UI, Vite, and TanStack Router featuring data tables, analytics charts (ApexCharts), and Excel export
      • Implemented a type-safe tRPC API layer with Express.js and PostgreSQL/Prisma for end-to-end TypeScript safety
      • Mentored the React Native/Expo mobile team on architecture decisions and best practices

    • Capital Voucher App — Cross-platform voucher management mobile app for Shunkhlai Group

      • Built with React Native/Expo and TypeScript supporting cashier QR scanning and employee voucher lifecycle management
      • Implemented role-based JWT authentication, real-time data sync with React Query, and persistent state with Zustand
      • Delivered smooth animations with Reanimated, high-performance lists with Flash List, deployed to iOS/Android via Expo EAS Build

    • PartTime HQ — Admin dashboard for a part-time staffing platform

      • Built with React 18, TypeScript, Mantine UI v7, TanStack Router/Query, and Zustand
      • Implemented JWT auth with automatic token refresh queue and organization-scoped role-based access control
      • Developed virtualized data tables with TanStack Table/Virtual supporting server-side pagination and filter operators
      • Built salary calculation with social insurance and tax breakdowns, fund allocation management, and Excel export

    • PartTime SQ — Shift management dashboard for GS25

      • Built with Next.js 14, Refine, Mantine UI, and TanStack Table as a multi-branch workforce scheduling and payroll portal
      • Developed complex shift lifecycle workflows
      • Integrated Firebase Cloud Messaging for real-time push notifications with a custom notification provider
      • Built salary engine handling hourly wages, overtime, social insurance contributions, and income tax deductions
      • Designed multi-tenant architecture with role-based access control

    • GS Payment Gateway — Enterprise payment gateway dashboard for GS25

      • Built using Next.js, TypeScript, and MUI in a Turborepo monorepo with shared API, state, UI, and utility packages
      • Implemented dual payment gateway integration (TDB/QPAY) with automated transaction matching and reconciliation
      • Developed interactive analytics dashboards with Chart.js for real-time transaction monitoring and branch performance
      • Created a reusable component design system documented in Storybook with visual regression testing via Chromatic
      • Implemented loyalty point and voucher management (LMS) with real-time balance tracking

    • Admin Boilerplate — Enterprise dashboard boilerplate

      • Developed virtualized data tables with TanStack Table/Virtual supporting server-side pagination
      • Created reusable components

  • Xyyp Music Group

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    Senior Software Engineer

    • Covid.mn — COVID-19 public information portal for Mongolian citizens

      • Built with Next.js, TypeScript, React, and Tailwind CSS providing real-time COVID-19 statistics and vaccination center directories
      • Implemented Static Site Generation (SSG) for location pages and SWR-based client-side data fetching for live statistics
      • Developed a data pipeline using Node.js to parse government XLSX spreadsheets into structured JSON across 9 districts and 100+ locations
      • Integrated Google Maps for location navigation, phone call actions, and vaccine type indicators (Pfizer, Sinopharm, Sputnik V)
      • Optimized SEO with Open Graph and Twitter Card meta tags, sitemap generation, and semantic HTML

    • About Stitches — Interactive presentation deck application

      • Built with React, TypeScript, and Vite to showcase the Stitches CSS-in-JS library
      • Developed a custom presentation framework (~3,000 LOC) with slide navigation, step-based content reveal, keyboard/touch gestures, URL state sync, presenter mode, and animated transitions
      • Styled with Stitches, Styled Components, and Styled System, with animations powered by React Spring

    • Music Streaming Platform — Client web and mobile apps for a Spotify-like music streaming service

      • Built the web client with Next.js, TypeScript, and GraphQL in a monorepo shared with the mobile app
      • Built the mobile client with React Native, TypeScript, and GraphQL sharing TypeScript model types across both platforms
      • Wrote unit and integration tests with Jest

  • ANDSystems

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    Front-end Developer

    • Eatfirst Slack Bot — Automated group lunch ordering system for office teams

      • Built with Python/Flask integrating Eatfirst.mn food delivery API and Mongolian payment gateways (SocialPay, LendMN)
      • Designed interactive Slack UX with slash commands, action buttons, and dialog modals using Slack Events API
      • Persisted user profiles and order data in Firebase Firestore with order lifecycle state management
      • Containerized the application with Docker and handled concurrent Slack API calls using Python threading

    • Xypyy — Automated employee attendance tracking system

      • Built with Python and Slack API integrating ZK fingerprint scanners via real-time TCP/IP event streaming
      • Designed a 3-process architecture managed by PM2 inside a Docker Alpine container
      • Implemented work hour calculations, lunch duration deductions, daily reminders, weekly summaries, and live office status updates via Slack Block Kit
      • Set up GitLab CI/CD with automated semantic versioning and deployment to a private Docker registry

    • LANDBANK Worker — Serverless banking data extraction system

      • Built with AWS Lambda, Amazon SQS, and Puppeteer for automated data extraction from LANDBANK online portal
      • Designed an event-driven two-phase authentication pipeline with separate SQS-triggered Lambda functions for login and OTP verification
      • Implemented session persistence using Firebase Realtime Database across serverless function invocations
      • Managed infrastructure-as-code using the Serverless Framework
    • Developed React Native mobile apps for LendMN (Mongolia) and LendPinoy (Philippines), lending/financial service applications
    • Set up GitLab CI pipelines to automate React Native builds for LendMN and LendPinoy
    • Created a PDF table scraper CLI with Node.js that extracts and returns cleaned table data as JSON
    • Improved code quality standards and development practices across the team
    • Built multiple web apps with React and Next.js

  • EYS-Style

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    Front-end Developer

    • Worked on a platform for music learners with schedule management and payment processing using Ruby on Rails
    • Created an HTTP client package used across the main Ruby on Rails platform
    • Built SPA applications for company events
    • Developed a custom Slack bot
    • Improved development tooling with Google Apps Script
    • Added test coverage for previously untested codebases

Projects

  • Kanso (opens in new tab)

    A minimal writing theme for Astro. Focused on typography, clean reading experience, and accessibility.

    • Astro
    • TypeScript
    • CSS

  • IPTV (opens in new tab)

    IPTV stream list and EPG generator for Mongolian TV channels. Automatically updates daily with ready-to-use M3U and XMLTV files.

    • TypeScript