Skip to content
JZ Technology

A small engineering company that doesn't hide how it works

JZ Technology is a technology company based in Bydgoszcz, Poland. We build software, look after the quality of systems already in production, and run day-to-day IT for companies. We trade as JZ Technology; the business is registered, and invoices, as Usługi informatyczne Jakub Zając.

Jakub Zając, founder and technology lead
Based in
Bydgoszcz, Polska
Languages
Polish, English
Ways of working
remote across Poland and abroad, on site in and around Bydgoszcz

The company started from a simple observation: in technology projects the expensive part is rarely the code — it is blurred accountability. So we run the company at a size where it is always clear who made a decision and who answers for its consequences.

We work in three areas: we build digital products, we look after the quality and infrastructure of systems already running, and we provide IT support for companies. Those areas feed each other — habits from audits and testing go into projects, and production experience goes back into audits.

The core structure is deliberately small, and we expand project teams with trusted specialists when the scope calls for it. There are no departments and no account managers. We take on as much work as we can deliver at the quality we promised — and if a project needs scale we do not have, we say so at the estimate stage.

Much of the experience behind this work comes from enterprise environments: large-scale data, regulatory requirements and formal release processes. We apply the same practice to a data platform and to the backup in a two-person office.

I built this company so the client talks to the person making the technical decisions, not to their representative. As long as I can keep it that way, I intend to.
From the founderJakub Zając, founder and technology lead

How we work

  • Clear accountability

    You know who agreed the scope, who does the work and who answers for the result. No chain of intermediaries.

  • Quality is not an upsell

    Tests, version control and documentation are part of every delivery, not a separate line on the invoice.

  • The language of decisions, not jargon

    We explain technical choices in terms of cost, risk and time. The jargon stays in the code.

  • Built for the long run

    We build so a system can still be maintained and extended three years from now — including without us.

The disciplines a project draws on

We maintain a focused delivery structure and expand project teams with trusted specialists when the scope requires additional expertise.

This is a list of capabilities, not a list of employees. On every project we say plainly who does which part of the work.

Technology

A short list — we pick what we can stand behind for the long run.

Languages & frameworks

TypeScriptJavaScriptPythonReactNext.jsReact Native

Testing & quality

PyTestTest automationAPI testingIntegration testingCI-integrated testing

Cloud & DevOps

AWSS3GlueRedshiftIAMCloudWatch

Databases & data

PostgreSQLSupabaseSQLETL / data pipelines

Let's see if we're a fit

Tell us what you're dealing with. If we are not the right supplier, we will say so directly and point you towards who to look for.