I build the application that solves your business problem.
End-to-end — architecture, code, deployment, support. By one senior engineer with experience from giant enterprises to lean startup teams.
Let's build it.
Tell me what you need to ship. I read every message myself.
One project at a time
Your project gets my full attention, not a slice of it.
Fast execution
I love the work. Most projects ship in weeks, not quarters.
You own everything
Code, infrastructure, decisions. No SaaS lock-in, no surprise dependencies.
Built for the people who decide and the people who ship.
CEOsCTOsFoundersTech leads
of
service businessesSaaS startupsscaling agenciesenterprise teams
One project at a time. Shipped end-to-end.
Does this sound familiar?
Most service businesses outgrow off-the-shelf tools long before they admit it. These are the patterns I see every week.
- 01
Your clients live in Excel, Google Calendar, WhatsApp, and three other tools
No single source of truth. Decisions made by gut feel because the data is in seven places at once.
- 02
You pay for seven SaaS subscriptions and none of them does what you actually need
Costs grow, the problem doesn't go away. The 'integrations' are usually a person copy-pasting.
- 03
You don't know which clients are actually most valuable
No revenue-per-client view. No retention curves. No churn signals before they happen.
- 04
Scaling means hiring more people, because the systems don't scale
Manual work everywhere — work that should have been automated three years ago.
- 05
Compliance, GDPR, invoicing, and taxes are a monthly tax on your time
You don't have a real pipeline; you have spreadsheets and a quarterly panic.
- 06
Your 'IT' is a freelancer who shows up twice a year and barely remembers the project
No ownership, no continuity. The tech debt compounds while no one is watching.
Custom software, built end-to-end.
Pick a category or describe your problem — most engagements span more than one of these.
Custom enterprise applications
Web apps, internal tools, and integrations sized for real businesses. Architected, built, deployed, and supported by one senior engineer.
Software architecture & consulting
System design, audits, modernization strategies, and tech decisions for teams that already have engineers but need senior judgment.
AI integration
Practical LLM workflows — retrieval, automation, agents. Built on Claude, GPT, and open models, with clear ROI and no hype.
Cloud & DevOps
Infrastructure-as-code, CI/CD, observability, and cost optimization across AWS, GCP, and Cloudflare. The boring layer that decides whether your product survives growth.
Modernization & migration
Legacy stack to modern foundations, with zero-downtime cutover plans and a working app at every step. (This site is one such migration.)
Clienteka — all your clients, one platform.
A SaaS platform for service businesses, built end-to-end. From architecture and data model to UI, payments, and infrastructure.
Unified client view
Every conversation, booking, invoice, and note in one timeline — no more spreadsheet sprawl.
Bookings & calendar
Native scheduling across staff, services, and locations. No third-party widgets, no double-bookings.
Revenue intelligence
Retention curves, churn signals, lifetime value — built into the dashboard, not bolted on.
Built end-to-end: architecture · frontend · backend · database design · auth · payments · CI/CD · infrastructure.
Visit clienteka.com+ several other applications and websites delivered under NDA. Details on request.
Polyglot by experience — I pick the right tool for the job, not the trendy one.
…and more. The right stack depends on your business — we discuss it on our first call.
How I work.
Predictable, transparent, fast. No black boxes.
- ~1 week
Discovery
Workshop, audit of your current systems, mapping problems to outcomes. Free 30-minute first call.
- Few days
Architecture & proposal
System design doc, tech stack, milestones, and a flat-fee proposal you can approve or push back on.
- 4–12 weeks typical
Build
Two-week sprints. Weekly demos. Full repo access. If something's off-track, you know on day 3, not month 3.
- ~1 week
Launch
Deployment, monitoring, runbooks, and training. Your team takes ownership of a working product.
- Optional
Support
Retainer or hand-off. SLA-backed maintenance, or a clean transfer to your in-house team.
Engagement, not pricing.
Every project is unique, so prices live in proposals, not on web pages. Here's what you get the moment we start talking.
You don't need to know the tech
You bring the problem and the business context. I bring the architecture, the stack decisions, the implementation, and the deployment. We talk in outcomes, not technologies.
You'll know the cost before we start
After a free 30-minute call, I send a written proposal with scope, milestones, and a flat price. No time-and-materials surprises. No scope creep.
You'll see progress every week
Weekly demo. Full access to the repo, the issues, the deploys. No black box. If something's off-track, you know on day 3 — not month 3.
Patryk Lisowski
Portrait coming soon
Founder of PLWebsites · Software Architect
I'm Patryk Lisowski — founder of PLWebsites, software architect, and the engineer on every project this studio takes on.
I've spent my career across the full spectrum of software work: enterprise teams of hundreds of thousands of employees, government projects with strict compliance requirements, 100+ person delivery efforts, and lean startup teams. Many projects I've built end-to-end myself; others I've architected and shipped with cross-functional teams. The constant is that the systems I build ship, scale, and survive — long after the initial engagement ends.
I love this work. I take one project at a time and give it everything. If we work together, you get a senior architect's full attention — not a slice of it between five other clients.
Currently building Clienteka.com. Based in Velbert, Germany — serving clients worldwide.
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