Hello

JAY.EXEAVAILABLE FOR HIRE
designed & built by Munkhjavkhlan E. / Jay · © 2026

// available for new projects · seoul, south korea

JAY

I turn ideas into real websites and apps. Whatever your business needs — I'll build it right.

NEXT.JS
TYPESCRIPT
TAILWIND
NODE.JS
POSTGRESQL
AWS
CI/CD
THREE.JS
JAY.EXEv1.0
[ THE JOURNEY ]6 COMPANIES · SINCE 2019

A bootcamp desk to Mongolia's biggest tech group.

I'm Munkhjavkhlan — "Jay". Six years, six companies: from a high-school programming class, through Mongolia's fintech scene, to leading front-end at one of its biggest tech groups. Follow the trail →

01THE START
Nest Academy
Where I learned to code

Senior year of high school, a programming class in Ulaanbaatar. One desk — and everything started here.

022019 — 2022
Front-End · intern → mid-level

Three years on real fintech & ERP platforms with React — at one of Mongolia's largest fintech companies.

032022 — 2023
ARTA Systems
Mobile App Developer

A React Native school-management app — the domain I'd later help rebuild as a full platform.

042023 — 2024
Web & Front-End Developer

Landing pages, scheduling tools and animated UIs across two studios — sharpening motion & product craft.

052025 — NOW
Mongol Ecology CenterTECH LEAD
Tech Lead · part-time

I lead a 2–3 engineer team for an ecology nonprofit and own every architectural call.

062024 — NOW
DigitalMindICT GROUP
Senior Front-End Developer

Part of ICT Group — Mongolia's largest tech group. Where most of the work in the next section was built.

[ SELECTED WORK ]8 PROJECTS

Things I've shipped.

Real platforms across commerce, GIS, food-safety, payments, EdTech and conservation. Click any one to read the full engineering deep-dive — the problems, the architecture, and the actual code.

Senior Front-End Engineer · DigitalMind · 2024–25CASE STUDY ↗

ODM Ecosystem

A full dual-country e-commerce ecosystem — storefront, back-office admin, supply-chain & landed-cost finance, and a push-based Shopify sync, across Mongolia, Kazakhstan & Europe.

Next.jsShopifyGraphQLSupply Chain
Senior Front-End Engineer · DigitalMind · 2025–26CASE STUDY ↗

ARTA Platform

School management, cafeteria ops & HACCP food-safety compliance — 11 microservices behind a GraphQL gateway, a Next.js admin, a self-service kiosk, and a React Native app.

MicroservicesReact NativeQPayPostgreSQL
Senior Front-End Engineer · DigitalMind · 2025–26CASE STUDY ↗

Tasty2Go

A food-surplus marketplace — consumer app with map clustering, merchant portal & platform admin over one backend.

React NativeExpoMaps
Senior Front-End Engineer · DigitalMind · 2025–26CASE STUDY ↗

UB Engineering

A municipal GIS platform — utility networks on a vector-tile map with a custom tile proxy and a geometry editor.

MapLibreLeafletGIS
Senior Front-End Engineer · DigitalMind · 2025–26CASE STUDY ↗

E-Shalgalt

An online exam platform — a 7-question-type builder admin plus a student mobile app (in development).

Next.jsLexicalEdTech
Tech Lead · Mongol Ecology Center · 2026PUBLISHING SOONCASE STUDY ↗

Rally for Rangers

A cinematic public site + private back-office for an international conservation motorcycle rally.

Next.jsGSAPPrisma
Tech Lead · Mongol Ecology Center · 2025–26PUBLISHING SOONCASE STUDY ↗

Mongolec CMS

A multi-tenant CMS with PostgreSQL row-level security, per-tenant S3 + CloudFront, and a Bull image pipeline.

PostgreSQLRLSAWS
Senior Front-End Engineer · DigitalMind · 2025–26CASE STUDY ↗

AI Automation Suite

n8n-powered agents automating document processing, approval chains & cross-tool reporting.

n8nOpenAINode.js

+ NOT SHOWN HERE — some of my work is built under government contracts and NDAs and can't be published in a public portfolio. The projects above are the ones I'm free to show; happy to walk through the rest privately on request.

02/ CONTACT

LET'S
BUILD
SOMETHING.

// open to freelance · full-time · collaborations
// based in seoul — I reply within 24 hours. No ghosting, ever.

jayslifecode@gmail.com