Modern applications built from scratch
We do not assemble templates. We design and write web applications, desktop software and AI solutions for companies that need a tool shaped around their process — not a process shaped around a tool. Everything you see on n3x.pl we wrote ourselves. You can try it before you contact us.
A portfolio you can verify in a minute
Most software houses show client logos. We show working products: online tools, desktop apps and Docker systems you can inspect or deploy right away.
Five apps you can run right now
N3X Shot
Screenshots, editing and offline OCR
Support screenshots with editable annotations and offline OCR. Review and cover selected information, then export a framed image.
v1.2.1 · updated Sep 11, 2026N3X Shell
SSH, Docker, and Kubernetes under control
An SSH client with a host manager, command library and YubiKey hardware key support. Passwords live in the OS keychain, not in a file.
v1.32.0 · updated Sep 11, 2026N3X Remote
Next-generation remote support
Remote desktop over WebRTC with its own signalling server. Instead of paying per seat — a 9-digit ID and a one-time password.
v1.8.48 · updated Sep 7, 2026N3X Scan
Your network under control
A subnet scanner with a native Rust engine: device inventory, service detection, change history and actions that connect the N3X ecosystem.
v1.6.1 · updated Sep 7, 2026N3X Care
Keep Windows in good shape
Safe Windows 11 cleanup and repair: review before deletion, hard path boundaries, DISM/SFC/CHKDSK, local history and reports with no telemetry.
v1.5.2 · updated Sep 7, 2026
Five Docker apps you can deploy on your own server
N3X Remote Server
Your own remote support cloud
Your own remote support infrastructure: Control Center, signalling, device database, TURN and managed unattended agents.
v1.15.46 · Docker · self-hostedN3X Market
Self-hosted Market Intelligence
A private US market research centre with watchlists, SEC filings, alerts, portfolio tools and optional AI analysis.
v0.5.2 · Docker · self-hostedN3X Remiza
A modern volunteer fire station panel
A browser-based OSP management system for members, equipment, vehicles, schedules and operations, with data kept by the unit.
v0.1.3 · Docker · self-hostedN3X Flow
A Project Room for agencies
A client portal for stages, acceptance, consolidated feedback rounds and scope changes, with project roles and decision history.
v0.1.0 · Docker · self-hostedN3X Vault
Encrypted self-hosted vault
A client-side encrypted secrets manager with FIDO2 hardware keys and recovery-kit restore.
v0.1.0-alpha.1 · Docker · self-hosted
What we build
Four areas. In each one we have a working product or deployment you can explore before signing anything.
Web applications and tools
Dashboards, configurators and calculators that replace spreadsheets passed around by email. They run in the browser and on a phone, with nothing to install.
Windows desktop applications
Native software in Rust and Tauri — a few megabytes, instant start and automatic updates. For where a browser cannot reach the hardware.
Integrations and automation
We connect the systems you already run and remove the manual copy-paste between them. APIs, webhooks, scheduled jobs.
AI-powered applications
Assistants that answer questions about your own data, document analysis and semantic search. Built on swappable models, with no lock-in to a single provider.
What it costs and how long it takes
Tick what your application needs to do. The range updates instantly — no phone call, no form and no e-mail required.
PLN 18,000–PLN 34,000
Net amounts. A range, not an offer — we give the exact figure for an agreed scope after we talk.
6–10 weeks
This estimate is indicative and is not a binding offer. The real cost depends on details we will learn in conversation.
How we work
No surprises halfway through. Four stages, each with a clear outcome.
- 01
Conversation
Fifteen minutes to understand the problem. If we are not the right team for it, we say so immediately.
- 02
Scope and quote
A written scope and a quote that holds for that scope — before we write the first line of code.
- 03
Build
Short cycles, each ending in a working version you can click through. Not progress reports.
- 04
Launch and support
We deploy, train your team and stay available afterwards. The code, the repository and the credentials are yours.
What we build on
Proven, well-documented technology. We do not experiment on a client's production system.
Interface
- Next.js
- React
- TypeScript
- Tailwind CSS
Backend and data
- Node.js
- PostgreSQL
- Supabase
Desktop apps
- Rust
- Tauri
Hosting and delivery
- Vercel
- Docker
- GitHub Actions
Questions we get most often
Straight answers — including the ones software houses usually answer with silence.
01How much does a custom application cost?
Projects start at PLN 15,000, and a typical internal application lands between PLN 40,000 and 100,000. The final figure depends on the number of screens, the integrations and whether you need user accounts. After a call we write down the scope and quote a price that holds for that scope — no open-ended hourly billing.
02What if I think of something new mid-project?
That is normal and not a problem — on a good project the best ideas only surface once you are clicking a working version. The quote holds for the agreed scope, so small adjustments simply happen within it. A genuinely new feature that was not in the agreement becomes a separate item, priced up front, and you decide whether it goes in now or after launch. We never add costs without your approval and never pause the project to renegotiate.
03How long does it take to build an application?
A smaller internal tool usually takes a few weeks; a larger system with accounts and integrations takes a few months. We work in short cycles, so you see a working version you can click through long before delivery, not just at handover.
04Do I get the source code?
Yes. On delivery the code, the repository and every credential are yours, with no extra licence fees. You can develop the application yourself or hand it to anyone else — we deliberately do not build dependency on us.
05Web or desktop application — which should I choose?
Web wins when access from any device and zero installation matter. Desktop makes sense when the program must reach the hardware, local files, or work offline — like our own N3X Shell and N3X Remote. If you are unsure, describe the process and we will advise; that is a brief question, not a pricing one.
06Will you sign an NDA?
Yes, we sign an NDA before discussing details if you need one. Details from the form come only to us and never enter any marketing database.
07Do you work remotely or only locally?
We are based in Sępólno Krajeńskie in the Kuyavian-Pomeranian region of Poland, but we run projects remotely across the country. Meetings are online, and we travel on site for deployment and team training where it makes sense.
Describe your project
We reply within one business day. No commitment and no sales funnel.
Prefer to talk?
Sometimes one call replaces three emails. Ring us during business hours or message us on WhatsApp.
- +48 531 425 277
- studio@n3x.pl
- Business hoursMonday – Sunday, 8:00 – 18:00
See the code in action
Before you send an enquiry, try what we have already built.
Looking for a website or an online shop? That is handled by our sister brand.
Go to aerix.pl