Taking on new work · Bydgoszcz & remote
I build, test and fix the technology your business runs on.
Custom software, websites and apps, test automation, DevOps and databases — and, when needed, the office computer that would not start this morning. No intermediaries: from the first call onwards you work with the engineer doing the actual work.
Experience from projects in enterprise environments: PwC · Roche · E.ON
Fig. 01 — scope of work: from a desk to a production platform
Eleven services. One person accountable.
I run every engagement personally — from analysis through delivery to maintenance. Pick the area where you need help.
Product engineering
Software, websites and mobile applications — designed and built from the ground up.
- 01Software developmentCustom web applications, internal systems, client portals and MVPs — designed around how your company works, not the other way round.
- 02WebsitesBusiness websites, online stores and landing pages — fast, lightweight and built to turn visitors into enquiries.
- 03Mobile appsAndroid and iOS apps built from one React Native codebase — loyalty, customer-facing and internal, taken all the way to store release and maintained after launch.
Quality & assurance
Testing, audits and independent consulting that tell you the true state of your systems.
- 04QA and software testingManual and automated testing, API, UI and regression tests, plus test strategy — a quality process that actually protects your releases.
- 05Technical auditsAudits of code, applications, websites, QA processes and infrastructure. Instead of opinions and reassurances, a written report with priorities and an action plan.
- 09IT consultingIndependent advice on technology decisions: choosing a stack, evaluating vendors, planning a product and rescuing projects that got stuck.
Platform & data
DevOps, cloud, databases and automation — the foundation software runs on reliably.
- 06DevOps and cloudCI/CD, Docker, Terraform and AWS, so releases become a single click and you hear about failures before your customers do.
- 07Databases and dataPostgreSQL design and optimization, migrations, reporting and automated data validation, so the numbers across your company finally agree.
- 08Automation and integrationsCopying data between systems, manual reports and retyping documents, replaced with scripts and integrations that run on their own.
IT support
IT care for companies and hands-on computer service for clients in and around Bydgoszcz.
- 10IT support for companiesOngoing IT care for companies without in-house IT: hardware, network, accounts and backups handled by one trusted person who knows your setup.
- 11Computer serviceComputer repair and speed-ups, virus removal, new-device setup, Wi-Fi and printers, all explained in plain language and priced honestly.
Projects you can inspect from the inside
Case studies with the technical decisions, the stack and the lessons learned — no marketing fog.
Habits from systems where mistakes are genuinely expensive
I have worked on projects delivered in enterprise environments — on systems connected with organizations such as PwC, Roche and E.ON. That means large-scale data, regulated processes, formal release procedures and teams spread across time zones.
I bring the same habits from those projects into every engagement: automated tests, version control, change reviews, monitoring and documentation. Whether it is a data platform or a local company's website.
Project environments
- PwCvia projects
- Rochevia projects
- E.ONvia projects
- Enterprise QA
- Test automation
- Data quality
- Cloud / AWS
- CI/CD
- Monitoring
These names describe environments where projects were delivered. They do not imply endorsement or partnership by the organizations listed.
From a conversation to a working system
The same predictable backbone of collaboration — scaled to the size of the project.
- 01
Conversation
You describe the problem — no commitment, no jargon.
- 02
Analysis & quote
You get the scope, approach and a cost range in writing.
- 03
Staged delivery
Regular working releases instead of progress reports.
- 04
Aftercare
Launch is the beginning of the collaboration, not the end.
Industries I serve
Different industries, one common denominator: technology should work and earn its keep, not get in the way.
- Small and medium businesses
- Startups and digital products
- Retail and e-commerce
- Software houses
- Service businesses
- Enterprise organizations
- Brick-and-mortar shops
- Private clients
A proven stack, chosen deliberately
I pick technologies for maintainability and cost — not fashion.
- TypeScript
- React
- Next.js
- React Native
- Node.js
- Python
- PyTest
- PostgreSQL
- Supabase
- AWS
- Docker
- Terraform
- GitHub Actions
Bydgoszcz and the surrounding area
Emergency? I'll come over or connect remotely.
Computer service and IT help for homes and small businesses: diagnosis, repairs, Wi-Fi, printers, backups. Explained in plain language, not tech-speak.
Before you write — quick answers
Directly with me, from the first conversation through delivery. There are no account managers or intermediaries: the person you agree the scope with is the same person who does the work and answers for it. Nothing gets lost in handovers, and decisions are made quickly.
Both. Software projects, consulting and IT support for companies run remotely for clients across Poland. On-site work covers Bydgoszcz and the surrounding area, mostly computer service and jobs that genuinely require being at the hardware or the network in person.
Polish and English. I run meetings and write documentation and correspondence in either language, which matters for international clients and mixed teams.
Yes. I run a registered business, Usługi informatyczne Jakub Zając, and every service is invoiced. VAT status: VAT-registered.
With a free, no-obligation conversation about the problem you want solved. I then do a short analysis and come back with specifics: a proposed approach, the scope written down and an estimate. Only then do you decide whether we go ahead.
Tell me what should work better
Write a few sentences about your project, problem or breakdown. I will reply with specifics: what I would do, roughly what it costs and where to start.
- Phone
- +48 573 021 012