Martin Rajniak
Solo Engineer at Recall (AI Learning App)
Poprad, Region of Prešov, Slovakia
Summary
👤
Senior🎓
Top SchoolMartin Rajniak is a solo engineer and product-minded ML/mobile specialist with 13 years of experience building and shipping consumer mobile apps and leading multi-team engineering efforts at Avast/Gen. He moved from Android development into iOS leadership and Kotlin Multiplatform advocacy, then pivoted to machine learning and generative AI—now building Recall, a Socratic AI tutor combining computer vision, time-series forecasting, and book-specific grounding to reduce hallucinations. Martin blends hands-on backend and mobile engineering (Kotlin Spring Boot, Compose Multiplatform, SwiftUI) with practical ML tooling (Python, TensorFlow, PyTorch), and has a track record of accelerating delivery, improving product metrics, and launching the company’s first LLM-powered app. Based in Poprad, Slovakia, he pairs rigorous academic training in economic informatics with a startup mindset—often shipping cross-platform solutions and developer workshops that attract talent and drive adoption.
13 years of coding experience
13 years of employment as a software developer
Computer Science; Electrical and Space Engineering; Economic Informatics, Computer Science; Electrical and Space Engineering; Economic Informatics at Luleå University of TechnologyMaster's degree, Economic Informatics, Master's degree, Economic Informatics at University of Economics in Bratislava
Slovak, English
Stackoverflow
640reputation
113kreached
23answers
11questions
Github Skills (71)
firebase-remote-config10
ktor10
gradle-plugin10
firebase10
firebase-realtime-database10
viewmodel10
firebase-database10
google-play-services10
kotlinx-serialization10
groovy10
android-sdk10
openvpn10
android-architecture-components10
java10
android10
Programming languages (6)
Github contributions (5)
MartinRajniak/MartinRajniak
Dec 2021 - Mar 2026
Contributions:7 pushes, 1 branch in 4 years 2 months
MartinRajniak/CatViewerDemo
Oct 2021 - Feb 2022
Kotlin Multiplatform Mobile demo for Android and iOS. App for viewing Cat pictures
Contributions:82 commits, 6 PRs, 51 pushes in 3 months
androidioskotlin-multiplatform-mobilekotlinkotlin-multiplatform
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