We build systems that solve real problems.
Fractional CTO with single ownership from design to production. System architecture, legacy modernization, technical leadership — for companies that mean business.
What we do
System Architecture
We design and build core business systems from the ground up. Systems that last years, not months.
Legacy Modernization
We refactor and migrate systems that have outgrown their original design. No rewrites from scratch.
New Products
We turn business ideas into working software products. From MVP to production-grade.
Fractional CTO
Long-term technical partnership. We own your tech strategy, build the systems, and keep them running.
Technical Rescue
Projects that have gone off track. Course correction by an experienced hand.
Why Blocksei
Architecture that lasts years
Systems managing 2.7 billion m³ of gas, thousands of AI calls monthly, dozens of businesses on one platform. No rewrites from scratch.
Single ownership from design to production
No handoffs between teams, no lost context. One person responsible from first design to running production.
Business first
We don’t start with technology — we start with the problem. The result isn’t code, it’s a working solution that makes money or saves time.
Long-term partnerships
Most of our partnerships last years, not months. Because the best results come with time. Thajský Ráj: 10+ years.
Direct collaboration
No project managers in between. You talk to the person who writes the code and understands your business.
Specialist network on demand
When a project needs UX/UI design or DevOps, we bring in trusted specialists. You talk to us — we deliver the result.
Limited availability for new projects
Availability changes with every new engagement. First come, first served.
Let’s discuss your project
Looking for a technical partner for long-term collaboration? Drop us a line and we’ll schedule an intro call.