Founders
Two people who spent years on both sides of the same projects: he on infrastructure, security and automation, she on design, interfaces and operations. Kol•ski is that collaboration as a company.
The first conversation is free: 30 minutes online, no preparation and no commitment.
Jakub Kołakowski
Co-founder. Technology, infrastructure and security.
More than 20 years in software engineering, cloud, infrastructure and security. For years he has designed and run cloud architecture, automation and security for high-traffic platforms at large organisations. Since 2009 he has run his own consulting practice, combining software with electronics and devices. Co-founder of Google Developer Group Warsaw, speaker and mentor.
- In projects: architecture and migrations, infrastructure and cost reviews, platform security, automation and integrations, devices and distributed systems.
- Leads cloud & infrastructure and AI & automation; responsible for custom R&D and building systems.
- In technology communities since 2002, as an organiser since 2011; more under training & community.
- j.kol.ski · LinkedIn
Agata Kołakowska
Co-founder. Projects, UX/UI and digital operations.
More than 10 years in digital projects, including many years with large portfolios of brand websites. She runs web projects from needs analysis to launch, designs interfaces in Figma and builds in WordPress herself, also with the help of AI. She handles the operations of website ecosystems: standards, access and compliance, which means licences, user consent and AI-generated content.
- In projects: needs analysis and scope, wireframes and prototypes, interfaces, running the implementation, content and the editorial process after launch.
- Leads digital products & platforms; responsible for UX/UI and digital compliance: licences, consent, GDPR, AI-generated content.
- Tidies what usually has no owner in a portfolio of sites: standards, permissions, analytics and consent.
How we work
- System first: technology and operations as a whole, not as a list of features.
- Scalability, maintainability, resilience and security are part of the scope, not an add-on.
- We combine engineering, UX, infrastructure, operations and business, because in practice they are one problem.
- Strategic thinking paired with practical execution: we build what we design.
- We quickly understand and stabilise complex systems before we start changing them.
What we have done
Experience from projects delivered before the company was set up, directly and in cooperation with agencies, for startups, agencies and large organisations in sectors including healthcare, FMCG, e-commerce, telecom, aviation, insurance and e-mobility. Figures and details under achievements on the home page.
- Many brands on one platform, across several markets at once.
- Infrastructure and operating costs down by 80% while the number of sites grew.
- More than 6 years without a security incident on the sites we ran.
- Permissions for the client, agencies and media houses in one model.
- Around 250 events organised and more than 20 years in technology communities.
A company since 2026, a practice since 2009
Kol.ski sp. z o.o. has existed since 2026. The people, the practice, the community and the tools are older; the legal form changed, the responsibility did not.
Own practice. The first contracts signed in his own name: software, electronics and devices, consulting. The beginning of an own technology brand.
Co-founding GTUG Warsaw, today Google Developer Group Warsaw. A community run without interruption since then: around 250 events, workshops and mentoring programmes.
Running large digital environments: site portfolios of many brands, more than 100 machines, more than 250 cloud projects in one model of roles. The in-house tools still in use today date from this time.
The sole proprietorship Sand Group Jakub Kołakowski is founded: the same practice in the form of a business, named J.KOL.SKI since 2025. In parallel, Agata has been running digital projects, for more than ten years with site portfolios of large brands: from analysis, through interfaces, to operations and compliance.
The business is reorganised into the limited company Kol.ski sp. z o.o.; the sole proprietorship is suspended on the day of the shareholders’ resolution, with no parallel period. Continued work with existing clients and the previous decade’s work brought in: tools, frameworks and documentation, under contracts transferring copyright and with an IP register. We count the company’s history from 2026 and the experience from 2009.
How to start
Free consultation
30 minutes online with one of us, depending on the topic. You tell us what you have and what hurts. We tell you whether and how we can help, and where we would start.
A first stage at a fixed price
A review, a pilot or a workshop, depending on the area. Fixed scope and a fixed price agreed before we start, the result reviewed with your team.
Implementation in stages
Acceptance criteria and a price agreed for each stage. After every stage you decide whether we continue or your team takes over.
Let’s talk
Tell us what you do and what you want to change. The person who will work with you replies, not a sales department.
The first conversation is free: 30 minutes online, no preparation and no commitment.