Kolosek

Kolosek is a software agency that now builds AI-powered products, from custom AI agents to full-stack web and mobile development. It takes projects from discovery and planning through to deployment, monitoring and ongoing updates, and clients keep full ownership of the code.

What Kolosek offers

• Custom AI agents: autonomous agents designed around a client's domain and workflows.
• Model integration: commercial and open-source language models built into products.
• Rapid prototyping: turning an idea into a working prototype in days.
• Automation and data pipelines: AI-ready API and data infrastructure that removes manual bottlenecks.
• Full-stack product engineering: products built with Rails, React and other stacks, including CI/CD and monitoring.
• Developer tools: its own products for Ruby on Rails CI, automated GitHub code review and code transparency.

Customers and markets

Kolosek works with startups and enterprises. Past work includes a marketplace in the Netherlands for second-hand designer brands, a sexual wellness platform and a virtual classroom app with live streaming.

Key facts

• Certifications: ISO 9001 and ISO 27001
• Engineering: senior engineers with experience in LLMs, RAG, fine-tuning and production ML