Microsoft-certified IT architect and developer, building enterprise-grade infrastructure by day and consumer apps that actually ship by night, now live on Google Play and the Microsoft Store.
IT professional by day, app developer by night, bridging enterprise systems thinking with hands-on product building.
I design and operate the infrastructure that keeps thousands of users productive every day, then go home and build software people actually download.
I'm Krasimir Borisov, an IT professional based in Solihull, UK, specialising in application deployment, endpoint management, and hybrid environment administration.
With a MSc in Computer Science. and five years of hands-on experience across Microsoft cloud services, I architect systems built to scale and stay secure.
Outside of work I build consumer-facing software: a zero-knowledge encrypted file vault, a native TV tracker, and a cross-platform internet radio app, all designed around zero-cost backend architectures and real-world usability. Two of them now ship on both Google Play and the Microsoft Store.
KBIS (KB Interactive Systems) is my umbrella for personal projects that sit at the intersection of infrastructure thinking and user-focused product design.
Personal projects applying enterprise-grade thinking to consumer software problems.
A zero-knowledge encrypted file vault. Every file is encrypted on-device with AES-256-GCM before anything reaches the cloud, so only ciphertext ever leaves the device. PBKDF2 key derivation (310,000 iterations), hardware-backed Android Keystore, biometric unlock, and Google Drive sync.
A native TV show tracker that replaced a £30/month AWS backend with a zero-cost architecture on the TVmaze API and a local Room database. Live search, drag-to-reorder watchlist, per-episode tracking, an On Tonight tab, push notifications before air time, and a cast/Person explorer.
A cross-platform internet radio app streaming from the Radio Browser API with a 3-server fallback. True background playback via a native foreground service, MediaSession integration for car dashboards and watches, station discovery across 14 genres and 21+ countries, favourites, and custom stations.
Design, deploy, and maintain hybrid Azure and on-premise infrastructure in enterprise IT environments, covering endpoint management, identity, compliance, and application delivery at scale.
This portfolio and development home base. A single-file, zero-dependency static page: fast, self-contained, and instantly deployable anywhere. No frameworks, no build step.
13 industry certifications across Microsoft, CompTIA, and JAMF, covering cloud architecture, security, identity, and endpoint management.
Spanning cloud architecture, endpoint management, and native software development.