// senior software engineer
SDK & platform engineering for mobile, backend, desktop & web.
// summary
16+ years shipping developer-facing software at scale. SDKs that serve millions of deployments across Android, iOS, Web, and Server — built for enterprise customers including AWS, Google, Bosch, and Leica Geosystems. Technical author (Fundamental Kotlin, 3rd ed.) and open-source creator behind 240+ repositories spanning project management, AI/LLM platforms, infrastructure automation, and mobile. Deeply specialized in crafting stable, high-performance APIs and frameworks that other engineers build on.
// featured work
Curated from 240+ repositories across five organizations — selected for scale, technical depth, and real-world impact. Each represents months of dedicated engineering.
The open-source JIRA alternative — enterprise project & issue tracking with multi-platform clients (Web, Desktop, Android, iOS). Designed for teams that need performance without vendor lock-in.
github.com/Helix-Track/Core → Read more →Distributed multi-LLM AI development platform — coordinating intelligent agents across machines for collaborative code generation, review, and refactoring at scale.
github.com/HelixDevelopment/HelixCode → Read more →Enterprise-grade universal ebook translation toolkit — any input format, any language pair. REST + HTTP/3 API with real-time WebSocket progress streaming. Multiple LLM backends supported.
github.com/HelixDevelopment/HelixTranslate → Read more →Multi-LLM ensemble agent service — orchestrating multiple language models behind a unified interface with intelligent routing, fallback, and result aggregation.
github.com/HelixDevelopment/HelixAgent → Read more →Unified AI inference platform — run models faster at any scale with predictable costs. One API for deployment, monitoring, and orchestration across hardware backends.
github.com/Helix-Flow/Platform → Read more →Advanced multi-protocol media management system — automatically catalogs, deduplicates, and syncs media collections with intelligent metadata enrichment across protocols.
github.com/vasic-digital/Catalogizer → Read more →Systematic LLM benchmark and verification framework — run standardized evaluations across models, track regressions, and generate compliance reports for AI quality assurance.
github.com/vasic-digital/LLMsVerifier → Read more →Cross-platform automated testing tool — UI recording, screenshot comparison, and test orchestration across web, desktop, and mobile targets from a single configuration.
github.com/vasic-digital/Panoptic → Read more →Declarative mail-server deployment — JSON-driven automation that provisions fully-configured mail infrastructure across multiple OS distributions in minutes.
github.com/Server-Factory/Mail-Server-Factory → Read more →Universal URL processing pipeline — route shareable URLs to remote or local processing endpoints with plugin-based transformation and delivery chains.
github.com/vasic-digital/ShareConnect → Read more →Tube-services video downloader — cross-platform Flutter app for downloading media from multiple streaming platforms with a clean Material UI.
github.com/vasic-digital/GrabTube → Read more →Common Android abstractions and implementations — reusable components, utilities, and patterns extracted from production SDK work across multiple enterprises.
github.com/vasic-digital/Android-Toolkit → Read more →Additional projects: GrabTube (Flutter video downloader), Android-Toolkit, Asinka (Kotlin IPC), Herald (Go event system), Courses-Creator, and many more across vasic-digital, HelixDevelopment, Helix-Track, Helix-Flow and Server-Factory.
// experience
Architected and led the Feature Flag SDK family across 10 platforms (Android, iOS, Flutter, React Native, TypeScript, Java, Kotlin, Swift, Go, Ruby). SDKs reached millions of deployments serving enterprise customers including AWS and Google. Designed for sub-millisecond flag evaluation, offline resilience, and real-time streaming updates. Defined SDK architecture patterns adopted company-wide.
Built real-time iOS & Android applications for next-generation 3D laser scanners used in surveying, construction, and forensic mapping. Owned the full mobile stack: low-level hardware communication over Bluetooth/BLE, real-time point-cloud data processing and rendering, and cloud synchronization. Collaborated with Autodesk on format interoperability.
Led development of the Connected Vehicles SDK — real-time OBD-II communication over Bluetooth with high-frequency data acquisition, signal processing, and on-device persistence. The SDK powered in-vehicle diagnostics and telematics applications deployed across multiple automotive product lines.
Full-stack mobile and backend development across Android (Kotlin), iOS (C++/Qt), and server infrastructure. Key products include Globex Data's Sekur secure-communication suite (SekurMessenger, SekurMail, SekurSuite), the BusRide transit platform, and the Yuno productivity app.
// skills
// author & education
Author of Fundamental Kotlin (self-published, 3rd revised edition, 2022) — a comprehensive guide to Kotlin from fundamentals to advanced patterns. Contributing author for Packt Publishing UK. Read the latest edition (PDF) →
Contemporary Information Technologies — Singidunum University, Belgrade.
Informatics and Computing — Singidunum University, Belgrade.
// contact
Open to senior engineering, platform/SDK, and technical leadership roles worldwide. The fastest way to reach me is email.