K4 Tech Solutions

K4 Tech Solutions is a Polish development shop focused on full-cycle web and mobile product delivery. Founded by Daniil Kozyr (CEO) and led by engineering head Bohdan Kuba, the company claims to ship products 30% faster than typical timelines. They've completed 25+ projects spanning fintech platforms, SaaS tools, crypto wallets, and neobanks. The team operates on a transparent, milestone-driven model with regular demos and structured updates. K4 offers a one-month post-launch support window at no additional cost.

Services and capabilities

K4 divides its work across four core areas. Backend development uses Node.js, Express.js, and NestJS to build what they describe as secure and scalable systems. Frontend work centers on React, Next.js, and Angular, layered with Tailwind CSS for responsive design.

Mobile app development covers both native (Swift for iOS, Kotlin for Android) and cross-platform builds using Flutter. The fourth pillar is AI integration—they use OpenAI and Python to add automation and AI tooling, often paired with Zapier for workflow automation.

The company positions itself as product-focused rather than purely technical, emphasizing involvement from "fintech teams" and "startups" throughout the development cycle. Clients have visibility at every key milestone.

How they work

K4 operates on a collaborative, transparent model. Regular demos, detailed updates, and structured deliverables keep clients aligned at each stage. They guarantee no delays and promise one month of free support post-launch. The site does not specify pricing models, contract minimums, or team composition per project.

Team and credentials

The site names two leaders: Daniil Kozyr (CEO & Founder) and Bohdan Kuba (Engineering Lead). No team size, certifications (ISO, SOC 2, GDPR compliance), or third-party ratings are mentioned in the source material.