Technical direction
Architecture, standards, estimates and roadmaps, written down and then proven in working code. I review, mentor and make the calls nobody else wants to make.
System designCode reviewEstimatesADRs
Hi, I'm
Paul Yuki
a software engineer
Fourteen years of building the quiet machinery behind products people use every day: marketing platforms, CRMs, cloud infrastructure, data warehouses, and the occasional game world. I care how a system feels as much as how it runs, and I build it end to end, from the first line of the theme to the last node in the cluster.
Tap the scene to summon a wave, or to attack faster. Skeep heals, Cindy distracts, Paul hits. Allow game saves and your level, XP and waves stay in your browser.
方針Practice
Engineering, with a sense of craft.
Most teams split the work: one person shapes it, another builds it, a third keeps it alive. I've spent fourteen years doing all three, and it shows in the details.
I work independently, end to end. I set the architecture, write the code that proves it, and own the pipeline that ships it. Teams bring me in when the stakes are high and the brief is still taking shape: marketing platforms, Salesforce extensions, cloud infrastructure and data.
After hours, I build ZenithArch Shell, my own Linux desktop environment, and games in Unreal Engine and C++. It's where ideas get tested long before they reach a client.
Design is a system, not a coat of paint.
Type, color, motion and copy get decided once, as tokens, and every screen inherits them.
Boring deploys, interesting products.
Pipelines, rollbacks and monitoring go in first, so launch day is quiet.
Own it end to end.
From DNS and server config to the last hover state. Fewer handoffs, fewer gaps.
Always leave an audit trail.
Original value, updated value, who changed it and when. Data you can trust is data you can explain.
仕事What I do
One person, the whole stack.
Hire me for one of these or all of them. Most projects touch at least three.
Interface engineering
Design systems turned into production code. Type, color and motion defined once as tokens, so every screen feels deliberate and every Figma handoff lands intact.
Design systemsFigma handoffCSSMotion
Web platforms & CMS
WordPress built from scratch: custom themes, page-template systems, mu-plugins and REST endpoints, with Elementor only where it earns its place. Hardened, cached and fast.
WordPressPHP 8ACFElementorKinsta
Salesforce extensions
Customer portals on Lightning Web Runtime, LWC components, Apex services and the glue that moves leads from website forms into the CRM.
LWRLWCApexMarketing CloudAccount Engagement
Cloud & DevOps
AWS, containers and CI/CD that make releases routine, plus edge security: WAF rules, bot protection and rate limiting tuned against real traffic.
AWSECSDockerKubernetesTerraform
Data engineering
ETL pipelines and warehouses that keep the original and updated value side by side, with a full JSON audit trail. Reporting on BigQuery.
PythonETLMySQLPostgreSQLBigQuery
AI & automation
Chat-ops assistants that answer CRM questions in team chat, retrieval pipelines, and local models running on hardware you own.
Claude CodeMCPllama.cppRAGPython
Games & real-time
Gameplay systems in Unreal Engine 5 with C++, small engines in C++20 and raylib, and the odd retro homebrew build for real hardware.
Unreal Engine 5C++20raylibBlueprints
道具Stack
The tools behind the work.
Nine disciplines, one person. Here's what I reach for, from the first prompt to the last backup.
Generative AI
Assistants I direct, and models I run on my own hardware.
- Claude
- ChatGPT
- Google Gemini
- Claude Code
- Self-hosted LLMs
- llama.cpp
- MCP & agents
Game development
Engines from AAA-grade 3D to pixel-perfect 2D.
- Unreal Engine 5
- Unity
- GameMaker
- RPG Maker
- raylib
- Blueprints
DevOps & cloud
Pipelines, containers and servers I configure myself.
- Docker
- Kubernetes
- Git
- GitHub
- GitLab
- CI/CD pipelines
- AWS
- Terraform
- Arch Linux (own distro build)
- Server configuration
- Apache & Nginx
Languages & web
The everyday toolkit for platforms and products.
- PHP
- Python
- C++
- JavaScript
- TypeScript
- Java
- QML
- WordPress
- Laravel
- React
Salesforce
CRM add-ons from portal to pipeline.
- LWR
- LWC
- Apex
- Marketing Cloud
- Account Engagement
- Flows
Design
From brand assets to quick social graphics.
- Figma
- Canva
- GIMP
- Snappa
- VistaCreate
- Pixlr
Security & speed
Locked down first, then made fast.
- CSP headers
- HSTS
- SSL / TLS
- WAF & bot protection
- Rate limiting
- MFA / 2FA
- Cloudflare
- Speed optimization
- Caching & OPcache
- Core Web Vitals
- Automated MySQL backups (CI/CD)
IT & systems
The machines behind the machines.
- VMware
- Virtual Machine Manager
- KVM / QEMU
- Parsec
- TeamViewer
- SSH & remote admin
- Windows & Linux admin
- Google Workspace & Microsoft 365
- DNS & email auth (SPF, DKIM, DMARC)
Data, SEO & analytics
Pipelines with an audit trail, and dashboards that prove the work.
- MySQL
- PostgreSQL
- BigQuery
- Redis
- MongoDB
- ETL & warehousing
- Google Analytics 4
- Looker Studio
- Google Tag Manager
- Search Console
- Technical SEO
- Schema markup
拡張Salesforce add-ons
Salesforce, extended past the defaults.
Out of the box, Salesforce stores your data. The add-ons I build put it to work: on the website, in the portal and in the chat your team already uses.
Java background, Apex in practice. Apex, the language behind Salesforce's server side, is a close cousin of Java: the same class syntax, interfaces and strong typing. The Java I trained on in college carries straight over, and the front end runs on Lightning Web Components, standard JavaScript.
- LWR · LWC
Customer and owner portals
Lightning Web Runtime sites with custom LWC components over live CRM records. Prototyped fast, then locked into a design system.
- Apex
Server-side services
Classes, triggers and REST endpoints that keep business rules inside the platform instead of scattered across scripts.
- MCAE · SFMC
Form to CRM pipelines
Website inquiry forms mapped field by field into Account Engagement, with server-side proxies so nothing leaks client-side.
- Webhooks
Lead alerts, routed per brand
New leads pushed into the right team chat the moment they're created.
- AI · MCP
CRM questions, answered in chat
Mention a bot, ask about your pipeline, get the answer with a table and a CSV or XLSX attached. Read-only by design.
補助AI, honestly
AI is my assistant, not my autopilot.
I use AI every day: to draft, to search, to try an idea in minutes instead of hours. But a model doesn't own the outcome. I do. Every line that ships has been read, understood and tested by a person who knows why it's there.
The tools got faster. The responsibility didn't move.
It speeds me up. It doesn't think for me.
Architecture, trade-offs and the final call stay human. AI handles the legwork around them.
Guided, never guessed.
Clear specs, constraints and context go in. Judgement decides what comes out and what gets thrown away.
Reviewed like any pull request.
Generated code gets the same scrutiny as a teammate's: read line by line, tested, and questioned when it looks too confident.
Know the craft before the shortcut.
Fourteen years of building by hand is what lets me spot when an answer is fluent but wrong.
Your data stays out of the prompt.
Credentials, client records and anything private never get pasted into a tool.
経歴Resume
Fourteen years, three disciplines.
Web development, then software engineering, then DevOps. I didn't leave any of them behind.
Senior Software Engineer
Independent, remote
Architecture and delivery for clients in real estate, AI and services: platforms built from scratch, Salesforce portals, servers on Kinsta and AWS, APIs, and the security work that keeps everything standing.
Senior Web Developer
Enterprise B2B platform
Owned a high-traffic WordPress platform end to end: custom modules, backend-rendered navigation, performance and edge hardening.
DevOps Engineer
Production infrastructure
Containerized services on AWS ECS, Docker and Kubernetes, and built the CI/CD pipelines that made releases predictable.
Data Engineering
ETL and data warehousing
Warehouses and pipelines with original and updated values kept side by side and a detailed JSON audit of every change.
Web Developer
Full-stack, PHP first
Where it began: PHP, MySQL and JavaScript, shipping sites for real businesses and learning what breaks in production.
Computing, with Java at the core
Object-oriented foundations
Java was the main language of my coursework. The habits it taught, strong types, clear classes and interfaces, are the same ones I use in Apex and C++ today.
Knights of the Legend
My first full game
A fantasy RPG of magic against steam technology. It's still my dream project, and I'm rebuilding it now in Unreal Engine 5.
Self-directed study
Linux internals, graphics, cloud
GPU and graphics programming, Wayland compositors, QML and cloud certifications. Building ZenithArch Shell is the best course I've taken.
作品Selected work
Things I've actually built.
Client names are left out on purpose. Ask me about any of these and I'll walk you through the details.
Open source · design + engineering
ZenithArch Shell
A QML-native desktop environment for Hyprland on Arch and CachyOS, built on Quickshell. Panel, control center, theming engine, lock screen, notification daemon and installer, all written from scratch. I direct the look and write every module.
Visit zenithshell.devRoleCreator, maintainer
StackQML, Quickshell, Bash
Scale200+ QML modules
Runs onHyprland, Arch, CachyOS
Channelv8 alpha, rolling
Owner portal on LWR
SalesforceA homeowner portal on Lightning Web Runtime: LWC components over live CRM data, prototyped first and then handed to design as the source of truth.
CRM assistant in team chat
AI · PythonA bot on a persistent WebSocket that answers Salesforce questions when mentioned, returning tables plus CSV and XLSX files. Runs Claude Code with a read-only connector.
Form to CRM pipeline
PHP · SalesforceA server-side proxy mapping a homebuilder's inquiry forms into Account Engagement, with a REST picklist feeding the property selector.
Edge hardening for WordPress
SecurityBot-shield and REST-guard mu-plugins, WAF and rate-limit tuning, and log audits for a high-traffic enterprise site.
Night Arena
C++20 · raylibA wave-defense roguelite written in modern C++ on top of raylib. Where I keep my low-level skills sharp.
Unreal Engine worlds
UE5 · C++Gameplay systems and mechanics in Unreal Engine 5, and the groundwork for the Knights of the Legend revival.
Watch the Unreal Engine demo on YouTubeHyprland & dwl dotfiles
LinuxMy daily driver: CachyOS with Hyprland, custom animations, pywal color sync and a fish workflow, plus a leaner dwl setup. It grew into ZenithArch Shell.
Explore the Hyprland riceData warehouse & ETL
Python · BigQueryAutomated pipelines keeping original and updated values side by side with a JSON audit trail, plus BigQuery reporting on GCP.
事業Ventures
Things I co-own, run and keep building.
Client work pays the bills. These are the bets I make with my own time.
OBSIDEVS
Co-founder
A small independent studio building software, games and AI tooling. I lead engineering: architecture, infrastructure and the internal tools the team runs on.
What we build
- An AI agent stack for the team: a self-hosted LLM working alongside frontier models
- Client platforms across web, Salesforce and DevOps
- Game prototypes and tooling
ZenithArch Shell
Creator & maintainer
A QML desktop environment for Hyprland on Arch and CachyOS. 200+ modules, built in public.
zenithshell.devNight Arena
Solo developer
A wave-defense roguelite written in modern C++ on raylib.
Knights of the Legend
Creator
My college thesis RPG, magic against steam technology, rebuilt from the ground up in Unreal Engine 5.
声Kind words
What it's like to build with me.
From the people on the other side of the work: clients, teammates and the leads I've reported to.
遊びPlay
Take a break. Cindy insists.
Two small games, written for this page in plain JavaScript. Best scores stay in your browser.
CindyCalico. Head of QA, mostly by sleeping on the keyboard.
Heads up: Stack Typer is built for a real keyboard. On a phone it still works, but autocorrect and thumbs will fight you. All good? Go for it, I won't stop you.
time60
wpm0
accuracy100%
chars0
Tap or click the box and start typing. The clock starts on your first key.
Space, click or tap to fly. Dodge the scratching posts.
連絡Contact
Let's build the thing properly.
Tell me what you're trying to ship, the deadline and what's already in place. I take on a few engagements at a time: architecture reviews, platform builds, Salesforce extensions, DevOps clean-ups and game systems. You'll hear back from me directly.
Email me directly
paul.hansen.yuki@gmail.comInclude what you're building, your deadline and what's already in place. I read and reply to every message myself.
