Your apps, at peak performance

I design, build and maintain web applications, internal systems and cloud infrastructure that grow with your business – reliable, secure, and ready to scale when you need them to. If you’re looking for someone to take care of your project end-to-end...

Let's talk

What I do?

Web Applications

I design and build web applications — from business logic and APIs to integrations with the systems your business already relies on.

Automation

I automate repetitive processes and apply AI where it genuinely speeds up your team's work.

Infrastructure

I set up and maintain infrastructure (in the cloud or on your own servers) with monitoring and security built in as standard.

& more with my team

For larger-scale projects, I work with a seasoned, multi-disciplinary team.

About me

Photo of Andrzej Kocjan

I have been working in IT for over a decade, and since 2021 I have been building web applications in Python. Before that, I spent four years as a network and systems administrator, so I can also handle servers and their configuration. I have been running my own business since 2023. I take on smaller projects from start to finish, from infrastructure through the API to the user interface. In larger projects, I am mainly responsible for the backend.

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Technologies

  • Python The language I write application logic and automation tools in.
  • Django REST Framework The toolkit I build the core of an application on.

  • GitLab CI The automation that checks every change and puts it live.
  • Ansible The tool that sets up servers identically, without any manual work.

  • Terraform A whole environment described in files, so it can be recreated.
  • AWS The cloud applications run in, growing along with their traffic.

  • PostgreSQL The database that safely holds all of an application's data.
  • Redis Fast temporary memory that relieves the database and speeds pages up.

  • TypeScript A front-end language that catches many mistakes before release.
  • Vue.js A toolkit for building screens that react without reloading the page.

  • Linux The system servers run on and the one I work on daily.
  • Bash Scripts that take repetitive server work off a person's hands.

Projects

ROOF3D

Backend, admin panel and infrastructure for a roof configurator with built-in photovoltaics.

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Testimonials

For two years he was one of the pillars of our development team. He did an excellent job as a backend tech lead. During this time, he solved countless problems we encountered.
Wacław Skorny
Wacław Skorny Project Manager, Milenium IT
Thanks to Andrzej Kocjan's IT knowledge and commitment, we were able to take the computerisation of Karkonosze National Park to a higher level.
Zygmunt Jała
Zygmunt Jała Główny specjalista ds. ochrony przyrody w Karkonoskim Parku Narodowym | Kierownik Zespołu GIS
Translation
Mr Andrzej Kocjan showed considerable knowledge and a professional approach to the task entrusted to him. We can recommend working with Mr Andrzej to other companies with a clear conscience.
Michał Piaścik
Michał Piaścik NETFACTORY Michał Piaścik
Translation
Wacław Skorny
Wacław Skorny Project Manager, Milenium IT
I highly recommend working with Andrzej. For two years he was one of the pillars of our development team. He did an excellent job as a backend tech lead. During this time, he solved countless problems we encountered. Andrzej is not only a high-class programmer, but also a friendly person with a positive attitude to teamwork.
Zygmunt Jała
Zygmunt Jała Główny specjalista ds. ochrony przyrody w Karkonoskim Parku Narodowym | Kierownik Zespołu GIS Translation
Andrzej Kocjan - an IT and GIS specialist - did a great deal for Karkonosze National Park over almost four years. Thanks to Andrzej Kocjan's IT knowledge and commitment, we were able to take the computerisation of Karkonosze National Park to a higher level. His very good command of Python deserves particular mention, as does his grasp of the tools used to configure computer networks and servers. He is very much at home in GIS - he set up ArcGIS Enterprise, on which the park's geoportal and many other applications are based. He made decisions and carried out tasks independently, was eager to keep developing and solved IT problems on his own. I recommend working with Andrzej Kocjan! Zygmunt Jała, Senior Specialist for Nature Conservation at Karkonosze National Park | Head of the GIS Team.
Michał Piaścik
Michał Piaścik NETFACTORY Michał Piaścik Translation
Mr Andrzej Kocjan was responsible for building a system for displaying advertising articles for our company, written in PHP and using a MySQL database. The application was delivered in December 2010 under a contract for specific work, in line with the agreed specification. During our cooperation, Mr Andrzej Kocjan showed considerable knowledge and a professional approach to the task entrusted to him. We can recommend working with Mr Andrzej to other companies with a clear conscience.

Contact

If you have a project, or just an idea for one, that I can help with, send me a short message. I'll reply as soon as I can, and we'll find a time that suits you to talk through the details.

[email protected]

Open to smaller engagements

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