01 — Product Engineer / 2026Currently shipping

I architect, ship,and operate products

end-to-end.
From kernel driver to landing page. The app, the infrastructure, the release pipeline, and the story — one integrated system, owned top-to-bottom. Six years shipping. Solo on every product.
16
Products shipped
9
Production stacks
4
Platforms shipped
100%
Solo built
xtractmp3 — video to MP3 / MP4, Cloudflare + StripeSwiftBill — invoicing for solopreneurs · live + active rebuildSwiftForm — form builder · live + active rebuildSwiftLead — lead CRM · live + active rebuildTapBio — link in bio · live + active rebuildTapCard — digital business card · live + active rebuildDISBET, Rippet, SimDex — shut down by regulatorsAtlas, VFX Studio, Kineo, Naviai, ApolloAPI, Blob AI, Apex Akina — deprecated archivextractmp3 — video to MP3 / MP4, Cloudflare + StripeSwiftBill — invoicing for solopreneurs · live + active rebuildSwiftForm — form builder · live + active rebuildSwiftLead — lead CRM · live + active rebuildTapBio — link in bio · live + active rebuildTapCard — digital business card · live + active rebuildDISBET, Rippet, SimDex — shut down by regulatorsAtlas, VFX Studio, Kineo, Naviai, ApolloAPI, Blob AI, Apex Akina — deprecated archive
02 — Selected Work

16 products.One operator.

Each one shipped, deployed, and operated as production software — not coursework or proofs of concept. Three were forced offline by regulators. Six are deprecated but archived as reference. The current active product lines are the Swift and Tap suites at the top of the grid.

★ Featured · ActiveLive
Consumer · SaaS

xtractmp3

Video → MP3 / MP4 from YouTube, TikTok, Instagram, X, Reddit, SoundCloud + 20 more sources. Self-hosted Cobalt + tikwm fallback, Cloudflare D1 + Workers, Stripe billing, OAuth, ad-free Pro tier.

Next.jsCloudflare WorkersD1KVStripeCobaltOpenNextResend
🔒 xtractmp3.com
xtractmp3
Extract anything.
Keep what you love.
youtube.com/watch?v=…MP3
Free · Ad-free with Pro
01
Live
Invoice
#INV-1024
Paid
Web design — Sept$1,200.00
Hosting · 1 mo$48.00
Tax$99.84
Total$1,347.84
SaaS · Swift suite
SwiftBill

Lightweight invoicing for solopreneurs — pay-in by Stripe, recurring + one-off, branded PDFs. Under active rebuild.

ReactStripePostgresReportLab
02
Live
Contact form
jane@example.com
Acme Corp
What can we help with?
SaaS · Swift suite
SwiftForm

Form builder with conditional logic, webhooks, and a public-share renderer. Under active rebuild.

ReactNodePostgresWebhooks
03
Live
Pipeline148 leads
M
Mia TanakaInbound · demo booked
hot
J
Jordan LeeReplied · waiting
warm
S
Sam PatelCold · queued
cold
SaaS · Swift suite
SwiftLead

Lead capture + simple CRM with automated email follow-up sequences. Under active rebuild.

ReactNodePostgresSMTP
04
Live
@krueger
Latest drop
YouTube
Newsletter
Shop
2,418 clicks
Consumer · Tap suite
TapBio

Link-in-bio creator with a 10-theme palette system, drag-to-reorder links, live view + click analytics, and universal SSO across the Tap + Swift suites.

Next.js 15Cloudflare WorkersD1OpenNext
05
Live
KruegerProduct Engineer
krueger.dev@outlook.comTAP →
Consumer · Tap suite
TapCard

Digital business card — NFC + QR landing page with one-tap 'Save to Contacts' (vCard 3.0), 10 palette themes, embedded booking links, and unified Tap suite auth.

Next.js 15Cloudflare WorkersD1OpenNext
06
Shutdown by gov
SaaS · Market intel
SimDex

Market intelligence tooling — board, wallet, room, company surfaces with execution-adjacent depth and quote previews.

FastAPIPostgresWebSocketsReact
07
Shutdown by gov
Consumer · Casino
DISBET

Crypto casino — 30+ games (Crash, Dice, Mines, Plinko, Blackjack), instant deposits, Discord-linked accounts, live rain rewards.

NodePostgresHMAC-SHA256WebSockets
08
Shutdown by gov
Consumer · TCG
Rippet

Mystery pack opener — provably-fair five-card pulls, daily shards, rarity-floor instant resale market.

NodePostgresProvably-fairStripe
09
Deprecated
Tooling · 3D
Atlas

3D Earth bridging Three.js orbital view and Cesium surface-detail in one app. Deprecated — Three.js + Cesium dependency tree no longer compiles cleanly, would need a stack-wide refresh to keep maintaining.

Three.jsCesiumTypeScriptVite
10
Deprecated
Game · Deprecated
Apex Akina

Touge arcade racer — Canvas pseudo-3D stable build + Three.js experimental engine in the same repo.

Canvas 2DThree.jsTypeScriptGame loop
11
Deprecated
Tooling · WebGL
VFX Studio

Director-prompt WebGL scene playground — 8 shapes, 11 palettes, post-FX, audio-reactive, video record. Deprecated — Three.js + post-processing dependency churn would need a full rewrite to keep current.

Three.jsWebGLGLSLWeb Audio API
12
Deprecated
Tooling · Solar
ApolloAPI

Local fleet-monitoring dashboard for Enphase-based solar installers. Scraped the Enlighten session — no paid API required.

PythonFastAPISQLite
13
Deprecated
Native · AI
Naviai

Local AI navigation companion — privacy-first voice assistant running on-device.

React NativeLocal LLM
14
Deprecated
Tooling · Agent
Blob AI

Local personal assistant + agent framework with reusable handoff primitives for multi-agent workflows.

PythonLangGraphLocal
15
Deprecated
Native · PWA
Kineo

PWA + mobile flows for a fitness tracking product — offline-first, push notifications, native share.

React NativeExpoPWASupabase
03 — Stack inventory

Everything I'llreach for in production.

Picked deliberately — boring infra where it counts, fast tools where it doesn't. Every line in this list has shipped to a real domain with real users.

01Languages
  • TypeScriptDefault. Every web product.
  • JavaScriptGame loops, Canvas, Node services.
  • PythonApolloAPI, FastAPI services, PDF gen.
  • SQLPostgres-first, RLS, transactional schema.
  • GLSLPost-FX shaders for VFX Studio.
  • BashCutover playbooks, infra scripts.
02Frameworks & libraries
  • React · Next.jsMost consumer + SaaS surfaces.
  • Three.js · R3FVFX Studio · Atlas · Apex Akina v0.
  • Canvas 2DApex Akina pseudo-3D + drift physics.
  • CesiumJSAtlas surface-detail geospatial mode.
  • Node · ExpressProvably-fair engines, APIs.
  • FastAPISimDex market services.
  • React Native · ExpoKineo PWA + native flows.
  • Vite · WebpackBuild pipelines, lazy chunks.
03Infrastructure
  • Cloudflare Workers · D1 · KVEdge deploy, security headers.
  • Supabase · PostgresAuth, RLS, transactional schema.
  • StripeSubscriptions, one-off, webhooks.
  • Render · Vercel · RailwayMulti-service deploy + cutover.
  • Custom DNS · TLS · domainsProduction cutover playbook.
  • CI / CD (GitHub Actions)Build / test / deploy pipelines.
04Practices
  • System & API designREST, webhooks, auth flows.
  • Performance engineeringProfiling, bundle, render perf.
  • Provably-fair / cryptoHMAC-SHA256 commit / reveal.
  • Real-time / WebSocketsLive chat, betting feeds.
  • Cutover opsApex domain swap with zero downtime.
  • Release storytellingChangelogs, launch posts, copy.
04 — Operating principles

Six rules thatearned themselves.

None of these started as opinions — each came from something breaking in production and getting rewritten.

01Principle

Ship to a real domain or it didn't happen.

Localhost demos and Figma flows lie. Real users on a real domain at real production cost is the only evidence that survives review.

02Principle

Own the whole loop — code, infra, story.

Hand-offs are where products die. The same person who wrote the SQL writes the changelog, picks the DNS provider, and answers the support email.

03Principle

Boring infrastructure, fast iteration.

Postgres over experimental DBs. Stripe over rolling-our-own billing. The novelty budget is for the product, not the plumbing.

04Principle

Operate what you build.

Observability, rate limiting, security headers, and rotation procedures aren't day-2 work — they're the actual job. A live product is a system, not a milestone.

05Principle

Cut scope before cutting quality.

The features that survive launch are the ones polished to the point a stranger trusts them. Everything else is a fork in the road, not a requirement.

06Principle

Resilience is reading the regulator first.

Three of my products were shut down by governments. The right move is to plan exits, document handoffs, and keep your customer trust above your novelty stack.

05 — Process

Three phases.Architect → Ship → Operate.

The same loop every product runs through — whether it's a weekend tool or a paid SaaS. The boring discipline is what makes the velocity look unreasonable.

Phase 01Architect

Cut the surface to its smallest viable shape.

  • 01Map the user journey to surfaces, not features
  • 02Pick the stack that fits the failure modes — not the trend
  • 03Sketch the schema before any UI
  • 04Identify the cutover plan from day one
Timebox≈ 1–3 days
Phase 02Ship

Real domain, real Stripe, real auth — day one.

  • 01Scaffold with the production stack — no demoware
  • 02Wire payments + auth + email before the first feature
  • 03Push to apex with security headers + rate limits in place
  • 04Write the launch post in parallel with the last commit
TimeboxHours to weeks
Phase 03Operate

Watch metrics, rotate secrets, ship the changelog.

  • 01Logs + observability from day one, not day fifty
  • 02Quarterly secret rotation + dependency audit
  • 03Customer-facing changelog every two weeks
  • 04Document the shutdown story before you need it
TimeboxUntil the regulator shows up
Currently shipping
One operator · sixteen products

From kernel driverto landing page.

The app, the infrastructure, the release pipeline, and the story — one integrated system, owned top to bottom. No hand-offs.

06 — About
Operator
Six years shipping.
Solo on every product.

AI-aware engineering for the productsmost teams won't finish.

I'm a product engineer based on the West Coast, solo on every product in the showcase above. Six years in, the pattern is consistent: pick a real problem, ship the smallest surface that solves it to a real domain, then operate it until the answer is "keep going" or "cut scope."

Background in WebGL, real-time systems, payments, and cutover-ops. Three of the products in this portfolio were shut down by regulators — same engineer, same skill stack, different category outcome. Resilience is part of the work, not a footnote.

Available for product / frontend / release-system work — contract, fractional, or a clean handoff of a single surface.

Based in
Pacific Time · Remote
Open to
Product · Frontend · Release ops
Years shipping
Six · solo on every product
Languages
TypeScript · Python · GLSL · SQL
07 — Contact

Got a product that needs to ship?

One email. I'll reply with what's feasible inside the timebox you have, and what I'd cut.

Availability
Open · weeks not months
Engagement
Contract · fractional · handoff
Time zone
Pacific · async-first

No DMs, no forms, no "hop on a call." Email-first keeps the bar real and lets you check the work before we sync.