Building SimDex + SPUF

Krueger // Product Engineer

Shipping live apps, frontend systems, and release-ready product surfaces.

Interface architecture, product framing, QA automation, deployment, and release polish — the app, the infra, and the story as one integrated system.

LOC Pacific / US West · STATUS Available

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01 ARCHIVED

Kineo

Guided Wellness Platform — Discontinued

Former project. Browser-first PWA with account sync, structured health workflows, coaching, nutrition, and scanner surfaces. Development discontinued — skills carried forward.

PWA Health Coaching Installable
02 LIVE

SimDex

Market Intelligence Tooling

Market tooling with faster information flow, stronger context, and real execution-adjacent depth. Board, wallet, Dex, room, company surfaces with quote preview, swap build, auth, bookmarks, and social tools.

Finance Real API Dense UI Speed
SimDex app
03 BUILT

SPUF

Desktop System Utility

WPF desktop application built on .NET 10 with custom kernel driver integration. Polished command-center interface with real-time hardware monitoring, admin-level system operations, and a full dark theme with red accent design language.

WPF .NET 10 C# Kernel Driver
Case Study Private Build
SPUF
K R U E G E R
04 LIVE

SwiftBill

SaaS Invoice Generator

Freemium invoice generator built with Next.js 16 and Supabase. Create, manage, and export professional invoices as PDF. Stripe subscription billing, Google OAuth, live preview, and dashboard analytics.

Next.js 16 Supabase Stripe SaaS
swiftbill.app
12INVOICES
$4.8KREVENUE
$890PENDING
#0012
#0011SENT
#0010DRAFT

tree

Products

SimDex + SPUF + SwiftBill

Stack

HTML / CSS / JS / React / Next.js / C# / .NET

Deployment

Cloudflare Pages + Render

Verification

Playwright + Visual QA

Kernel

WDK / WDM / C Driver

Architecture

MVVM / PWA / API-first

open

Available for product, frontend, and release-system work where the interface has to carry real weight.

[email protected]

Krueger is a public dev alias.

GitHub and LinkedIn currently private — happy to share build context and architecture notes.