✦ SENIOR FULL-STACK SOFTWARE ENGINEER

Engineering Custom Software, Mobile Apps & High-Converting Platforms.

Q: What types of projects can I hire you to build?

I specialize in three core areas: (1) Custom Software & SaaS Platforms (web apps, admin dashboards, APIs, cloud systems), (2) Cross-Platform Mobile Applications (iOS and Android apps engineered with Flutter & Dart), and (3) High-Converting Landing Pages (sub-second load speed, bespoke design, magnetic conversion copywriting).

Q: What technologies and frameworks do you use?

For mobile and cross-platform apps, I build with Flutter & Dart for native 60fps performance on iOS, Android, and web. For web applications, I use React, Next.js, and TypeScript. For backends, I utilize Node.js, Python, PostgreSQL, Supabase, and Firebase. For visual design, I use Figma.

I'm Jaxon (Tan Yue Jun) — building production-ready custom software platforms, cross-platform mobile apps (Flutter, iOS & Android), and high-converting landing pages. Work directly 1-on-1 with an experienced technical architect from system design to live cloud deployment.

Accepting select software, mobile app & web projects this month

Start a Project → Explore Architecture & Work Cost Estimator

0+Products & sites built

0+ yrsEngineering craft

0%Code & IP ownership

0-on-1Direct with Jaxon

Custom Software & Digital Products by JUX

⚡

Architecture

Flutter • Next.js • APIs

🎯

Core Capability

Full-Stack & Mobile

🚀

Delivery

End-to-End Sprint

Custom Software & SaaS ✦ Cross-Platform Mobile Apps ✦ Flutter & Dart ✦ React & Next.js ✦ Full-Stack Cloud APIs ✦ High-Converting Landing Pages ✦ Sub-Second Load Times ✦ Stripe & Lead Capture ✦ 100% Direct With Jaxon ✦ Custom Software & SaaS ✦ Cross-Platform Mobile Apps ✦ Flutter & Dart ✦ React & Next.js ✦ Full-Stack Cloud APIs ✦ High-Converting Landing Pages ✦ Sub-Second Load Times ✦ Stripe & Lead Capture ✦ 100% Direct With Jaxon ✦

✦ THREE CORE PILLARS

What You Can Build With Me

Whether you need an entire software system, a cross-platform mobile app, or a high-converting landing page, I handle everything from system architecture to production launch.

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Pillar 01 • Full-Stack

Custom Software & SaaS Platforms

Production-ready web applications, SaaS MVPs, admin dashboards, and internal business platforms engineered for scale, reliability, and security.

Full-stack architectures (React, Next.js, Node.js, Python)
Robust database modeling (PostgreSQL, Supabase, Firebase)
Secure authentication, role permissions & Stripe billing
High-throughput REST & GraphQL cloud APIs

Learn Software Services →

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Pillar 02 • Mobile & Cross-Platform

Mobile & Cross-Platform Apps

Fluid, native-feel iOS and Android applications built with Flutter & Dart from a single unified codebase. Dual-role platforms (customer + retailer) with real-time sync.

Flutter & Dart cross-platform mobile engineering
Customer web & retailer dashboard ecosystems
Offline-first local caching & push notifications
Frictionless mobile checkout & modal workflows

Explore Mobile Builds →

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Pillar 03 • Web & Conversion

High-Converting Landing Pages

Bespoke, sub-second landing pages engineered with magnetic copywriting, luxury visuals, and conversion optimization to turn visitors into paying customers.

Google PageSpeed 95–100 guarantee & sub-0.5s loading
Compelling hook copy & objection-busting structure
Kinetic micro-interactions & interactive demos
Stripe payments, lead capture forms & GA4/Pixel tracking

View Landing Packages →

✦ PROVEN PROTOTYPES & PRODUCTS

Featured Work & Architecture

Real software, cross-platform apps, and conversion engines designed and coded by Jaxon.

Cross-Platform Commerce & Retailer Platform by Jaxon

Cross-Platform Mobile & Web

Flutter • Dart • Full-Stack Production Build

Dual-Role Retailer & Customer App Ecosystem

A multi-tenant commerce application featuring a shared-core architecture. Powered by Flutter & Dart, the system unifies a customer checkout web experience with a real-time retailer dashboard desk and merchant management portal.

Flutter Dart Shared Core Retailer Desk Customer Checkout REST APIs

AI-Powered Enterprise SaaS Platform by Jaxon

Full-Stack SaaS Platform

Next.js • Node.js • Cloud Production SaaS

Intelligent SaaS Platform & Telemetry Console

Enterprise-grade web application with real-time analytics streaming, interactive metrics telemetry, role-based team management, and automated Stripe subscription billing.

React / Next.js TypeScript PostgreSQL Stripe Billing Cloudflare Edge

High-Converting Digital Product Launch Site

Sub-Second Conversion Site

Conversion Engineering • GSAP Motion Launch Sprint

Luxury High-Performance Product Launch Experience

Engineered for high conversion with custom kinetic typography, 3D interactive stage, zero template bloat, and sub-0.5s mobile loading. Resulted in 4.2x lead capture rate and 100/100 Google PageSpeed rating.

HTML5 / Modern CSS GSAP Motion PageSpeed 100 Stripe Checkout Lead Automation

Why Solo Works

Bloated Agency vs. Senior Solo Craft

Traditional agencies charge $15k+ to outsource work to junior devs through layers of account managers. With JUX, you partner directly with a senior full-stack engineer and designer.

❌ Traditional Agency

Slow & Bureaucratic

Typical Cost

$10,000–$25,000

Turnaround Time

2–4 Months

Execution Quality

Junior Dev Handoff

Point of Contact

Account Manager

⚡ JUX Senior Solo Sprint

Fast, Direct & Senior

Transparent Cost

$399–$3,600

Turnaround

1–4 Weeks Agile

Execution Quality

100% Senior Handcrafted

Point of Contact

Jaxon Directly

✦ COMPLETE E2E SPRINT FLOWCHART

End-to-End (E2E) Process Flowchart

A transparent, 5-step engineering pipeline from initial technical architecture to production release. Every milestone delivered directly with Jaxon.

Step 1 of 5 ➔

Architecture & Strategy

We map out your technical requirements, data models, user journeys, API specifications, and core conversion wireframes.

✓ Technical Blueprint

Step 2 of 5 ➔

Bespoke Figma UI/UX

Interactive prototype and comprehensive design system. High-contrast typography, mobile layouts, and custom design tokens.

✓ Clickable Figma Prototype

Step 3 of 5 ➔

Senior-Grade Engineering

Handcrafted code in Flutter (iOS/Android), Next.js, or HTML5. Zero bloated dependencies, clean architecture, and sub-0.5s speed.

✓ Live Staging Preview

Step 4 of 5 ➔

APIs, Payments & QA

Stripe billing, database synchronization, webhooks, and analytics tracking connected and tested end-to-end.

✓ Verified Workflows & QA

Step 5 of 5 🚀 LIVE

Production Release & Handover

App Store / Google Play / Edge domain deployment, complete Git repository transfer, and 100% IP ownership handed over.

✓ Production Release + IP Handover

TRANSPARENCY & VELOCITY

Milestone-Based Investment. Direct 1-on-1 Collaboration.

Work directly with Jaxon with regular demo builds and daily direct updates. Zero middle management.

Lock In Your Project → Calculate Investment

Transparent Pricing

Interactive Project Investment Estimator

Select your project category and key architectural capabilities to get an instant estimate of investment and launch timeline.

1. Select What You Need Built

High-Converting Landing Page $399 • Bespoke UI, hook copy, sub-0.5s speed, lead capture

Cross-Platform Mobile App MVP $1,800 • Flutter iOS & Android, native UI, offline sync & APIs

Full-Stack Web App / SaaS Platform $2,400 • React/Next.js, database, auth, admin dashboard & Stripe

Enterprise Custom Software System $3,600 • Multi-role portals, complex business logic & data pipeline

2. Select Modules & Capabilities

Tailor the exact architectural components required for your build:

📱 Cross-Platform Mobile Build (+$450) Flutter iOS & Android app synchronization

🔐 Auth & Role-Based Permissions (+$250) Secure session/JWT auth & customer/admin roles

💳 Stripe Subscriptions & Checkout (+$250) Automated recurring billing, webhooks & receipts

⚡ Cloud Database & Custom APIs (+$350) PostgreSQL / Supabase / Firebase real-time setup

🎨 Bespoke Figma UI/UX System (+$300) Interactive clickable prototypes & design tokens

🚀 CI/CD & Production Cloud Deployment (+$200) Automated deployment, custom domain DNS & SSL

Fixed Milestone Quote

Estimated Investment

$399

Target Timeline: 1–2 Weeks (Sprint)

Engagement: Direct 1-on-1 Milestone

Code & IP Ownership: 100% Transferred to You

Direct collaboration with Jaxon (No junior handoffs)
Weekly interactive staging previews & updates
Senior-grade code, architecture & documentation
Dedicated post-launch hypercare included

Sends brief directly to Jaxon on Telegram. Instant priority review.

★ 100% Handcrafted Code

📱 Cross-Platform & Full-Stack

⚡ Sub-0.5s Page Loads & 60fps Apps

🤝 Direct Collaboration With Jaxon

Meet The Builder

One senior engineer & designer. Full craft.

You work directly with Jaxon (Tan Yue Jun) designing the interface, writing the software, and deploying to production.

Jaxon (Tan Yue Jun)

Founder & Senior Full-Stack Engineer — JUX Technologies

Personal Portfolio: tanyuejun.juxtechnologies.net.
With 8+ years of engineering experience across Flutter cross-platform mobile apps, reactive web platforms, and high-converting launch engines, I combine product strategy, clean systems architecture, and pixel-level craft. Zero agency layers, zero excuses.

Read Full Story & Arsenal → Work With Jaxon

FAQ

Frequently Asked Questions

Common questions about building software, mobile apps, and landing pages with Jaxon.

I specialize in three core areas: (1) Custom Software & SaaS Platforms (web apps, admin dashboards, APIs, cloud systems), (2) Cross-Platform Mobile Applications (iOS and Android apps engineered with Flutter & Dart), and (3) High-Converting Landing Pages (sub-second load speed, bespoke design, magnetic conversion copywriting).

Yes! That is my core superpower as a solo full-stack creator. Because I master UI/UX design in Figma, frontend web/mobile code, and backend database logic myself, you don't need to coordinate 4 different specialists. Your product is delivered faster, more cohesively, and with zero lost context.

For mobile and cross-platform apps, I build with Flutter & Dart for native 60fps performance on iOS, Android, and web. For web applications, I use React, Next.js, and TypeScript. For backends, I utilize Node.js, Python, PostgreSQL, Supabase, and Firebase. For visual design, I use Figma.

High-converting landing pages take 1–2 weeks; mobile app MVPs and full-stack SaaS platforms typically take 3–6 weeks depending on feature scope. Every project runs on structured sprint milestones with weekly live demos.

Yes, 100%. All source code (Git repository), Figma designs, database schemas, and deployment accounts are transferred completely to you upon project completion. There are zero recurring agency fees or vendor lock-ins.

We collaborate directly 1-on-1 via a dedicated Telegram or Slack channel, backed by weekly staging links and video walkthroughs. You talk directly with the engineer writing your code — no account reps or telephone games.