Web applications
Business applications in C#, .NET and modern web front ends. Designed for long lifecycles and real users.
Polish Developer Network · Tarnów, Poland · Worldwide
Software for finance.Networks and automation for buildings.
PDN is an independent engineering company. Two teams, one standard: quality, security and privacy. We work remotely by default and travel when the job needs it.
Two divisions
Separate teams. The same standards.
Software and Smart Buildings are run by different people with different tools. What they share is how we work: careful, security-first, and clear about scope.
Transfers/PostTransfer.cs
01
Software
Custom software and engineering teams for the financial sector.
- Web applications in C# and .NET
- AI, machine learning and automation
- Team augmentation: engineers who join your team
02
Smart Buildings
Networks, security and automation for offices, hotels and homes.
- UniFi: Network, Protect, Access, Power, Audio, Connect
- KNX building automation
- Design, commissioning, monitoring and support, remote first
01 — Software
Built for regulated environments.
Most of our software work is for banking and finance: long-running B2B contracts where correctness, auditability and data control matter more than novelty. We also work with other industries that value the same things.
Financial systems
Domain-heavy systems for banks and financial companies: integrations, workflows, reporting, compliance-aware design.
AI and automation
Practical machine learning and LLM-based automation embedded in your processes, running on your infrastructure.
Team augmentation
Senior engineers who join your team, your tools and your rituals, for as long as you need them.
Two ways to work with us
01
In-house development
We take a defined scope end to end: analysis, architecture, delivery, support.
02
Team augmentation
You keep the lead. We add engineers who report to you and work in your environment.
Technologies
- C#
- .NET
- ASP.NET Core
- Blazor
- TypeScript
- React
- SQL Server
- PostgreSQL
- Docker
- ML.NET
- LLM integrations
- Fully remote, day to day
- On-site meetings and workshops anywhere in the world
- English and Polish
- Your infrastructure, your repositories, your control
02 — Smart Buildings
Networks and automation you actually own.
We design, commission and look after UniFi networks and KNX building automation for small and mid-size businesses and high-end homes. Order one or both: they are separate services delivered by one team.
UniFi
UniFi
One platform for the network, cameras, door access, power, audio and IoT. Managed locally, with no licences or subscriptions.
- NetworkWi‑Fi, switching, routing, VPN, security
- ProtectCameras and video recording, stored on site
- AccessDoor access with readers, hubs and intercoms
- PowerPDUs and backup power for the rack
- AudioMulti-zone speakers and paging
- ConnectDisplays, EV charging and IoT devices
KNX
KNX
The open, worldwide standard for building automation since 1990: thousands of certified devices from hundreds of manufacturers, with no vendor lock-in.
- Lighting and scenes
- Blinds and shading
- Heating, cooling, ventilation
- Energy monitoring
- Presence and climate sensors
- Visualisation and touch panels
What we do
01
Design
Surveys, audits, advisory
02
Provisioning and commissioning
From controller to the last device
03
Monitoring and management
Remote, continuous
04
Support and troubleshooting
When something misbehaves
05
Hardware deployment
Optional: racking and stacking
—
Not us: structured cabling
We advise on and coordinate cable installation and termination. A cabling contractor performs it.
Who we work for
- Offices
- Hotels and hospitality
- Restaurants
- Rental properties
- Houses and apartments
UniFi + KNX
Better together. Fine apart.
UniFi runs the network, cameras and doors. KNX runs lights, blinds and climate. Connected, they react to each other: locally, with no cloud in between.
- 01
Arrive
A door opens with UniFi Access. KNX lights the entrance and sets the room to comfort mode. Protect keeps the clip locally.
- 02
Leave
Last person out: KNX drops to eco mode, blinds close, Protect switches to away recording.
- 03
Alarm
Smoke or intrusion: all lights on, blinds up, doors locked or released by policy, cameras record at full quality.
Values
Quality, security, privacy.
01
Quality
We cannot be best at everything, so we choose carefully: C# / .NET web applications for finance, and high-end hardware from trusted brands for buildings.
02
Security
Current cybersecurity practice, secure devices and networks only, and the highest standards for handling customer data.
03
Privacy
Local-first by default. Data stays on your infrastructure and inside your building. Cloud features only when you ask for them.
Local-first, by design
- Software
- We work in your environment, on your hardware. You keep full control of code and data.
- Buildings
- UniFi and KNX run on controllers inside the building. Recordings, access logs and automation stay there.
Cloud features: on explicit request only
Delivery model
Remote by default. On site when it matters.
Remote delivery is the most cost-effective option and covers most of the work. We travel worldwide for the parts that need a person in the room; travel adds to the total cost.
Remote
- Design and consulting
- Provisioning and commissioning
- Configuration and migration
- Monitoring and management
- Software development and support
On site
- Site surveys and audits
- Hardware installation
- Oversight of structured cabling
- Meetings, workshops and social events
Available globally in English and Polish. Country-specific regulations for building work may add effort and cost.
Tarnów, Poland
Experience
A new company. A team with a long record.
2007
Exlab
Sole proprietorship. Five years of designing and configuring smart homes: KNX and other systems.
2012
ALM
Sole proprietorship. Automated testing first, then classic software development. Still active today.
2019
Polish Developer Network
A new limited company. The team moved here and has delivered software since.
2026
Smart Buildings
The building-technology experience returns as a second division: UniFi and KNX.
10+
years of software development, as a team
5+
years in smart homes and building automation, as a team
7+
years of PDN as a company
Exlab, ALM and PDN are separate legal entities. PDN is not the legal successor of either. What carried over is people and experience.
Client confidentiality
You will not find client logos here.
All our work is delivered under NDA. Publishing project details, even sanitised photos, narrows the attack surface around our clients, and a public client list would make us a target too.
So we publish nothing about our customers. References and details are shared in a private meeting, once we have verified that a prospect is a real, legitimate business or customer.
NDANo client listNo project photos
Tell us what you need.
A short call is the fastest way to find out whether we are the right fit.