Martin Rajniak

Senior software engineer with 12+ years building and shipping production systems, most of it at a privacy and security company.

Poprad, Slovakia · CET · EU citizen · LinkedIn · GitHub · Email

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Recruiter or hiring manager? Full-time or B2B · Remote (EU), CET · Available now CV, stack and experience →

What I've built

Recall: the app's website and a tutoring session on a phone

Recall: Read & Remember

iOS · Android · Web · AI · Backend

Recall - an AI Socratic tutor for readers to help them remember what they read. It is now available to everyone on Google Play and the App Store.

Try it: Google Play · App Store · Web app

The Android app classifying a bean leaf as bean rust

Bean disease classifier

Android · Computer vision · On-device ML

Android application for classifying bean disease using TFLite for local inference.

See it: GitHub

Air quality forecast for Poprad

Forecasting · ML pipeline · Cloud

An air quality prediction system designed to forecast AQI for Poprad, Slovakia using historical air-quality and meteorological data.

See it: GitHub

Before Recall: led a team of 6 shipping Avast Secure VPN, AVG Secure VPN and HMA from a single codebase. More in Projects.

How it works

1. Describe itWhat you want to build.
2. Short callScope, timeline, fit.
3. ProposalPlan and estimate, in writing.

First is user - are we actually solving something for them? Then there is budget - how much time or people do we have for the problem? Then there is technical solution.

What people say

The app was an engineering marvel with outstanding architecture, stability, QA automation, and release pipeline.

— Ján Švehla, Software Engineer @ Google

[…] always considering customer needs and business expectations. He keeps everything organized, everyone around informed and happy, and helps us to improve.

— Michal Polačko, Head of Product, AI Builder & Automation Architect

I also appreciate his pragmatic approach and that he didn't put ego into decisions. One of few developers I met, who really cares about product quality and user experience.

— Jan Marek

From LinkedIn recommendations.

Start a project

Opens your email app with this filled in. Or email rajniak.m@gmail.com.