Work
Jobs from recent years: the task, what I decided myself and what came of it.
SafestWay
SafestWay shows the safest route, not the fastest one. To do that it works through millions of records on crime, street lighting and cameras. I designed the whole system.
Monument (UK digital bank), via Nearform
Through Nearform I was the only engineer on the premium-services mobile app, CRM and back end of a UK digital bank. The product team now updates the content of five screens without a developer.
Tether Data (QVAC programme)
I built the desktop and mobile interface for an AI programme that runs on the user's own device, with no cloud. The tests I handed over can be run by the client themselves.
Florio GmbH (a Sobi subsidiary, Munich)
I led five mobile developers on Class IIa medical software. The app handles patient data without internet and syncs with the smart injector over Bluetooth; errors from manual data entry fell by 40%.
Endeavor Streaming (part of Deltatre since September 2025)
I worked on the TV apps of a live sports streaming platform whose peak traffic exceeded 500,000 concurrent viewers. Playback stayed stable even in long live 4K streams of over two hours.
Credo Therapies
As lead product engineer, I reworked the first steps of a therapy app that came out of the University of Oxford, and 25% more users kept using it afterwards. I also added personalised GPT-4 suggestions.
UIC Digital
I led improvements to several existing apps without a full rewrite. They shared one code repository and a server layer tailored to the apps, on a platform serving multiple customer organisations. I also added face and fingerprint sign-in.
Session Studio (Session.id Limited)
With the team, I rebuilt the app step by step. The embedded website gave way to the phone's own interface elements.
ASquared
I was responsible for the web interface, the back end and the shared interface components. The system ran on AWS.
ComAve
I designed and built the shop's catalogue interface and page layouts myself. I took the work from the client's written requirements through Figma designs and a React/Next.js build to handover.
Career
I spent nearly ten years in England (Bolton, Greater Manchester), and from 2018 to 2021 worked for Manchester product companies and agencies. Since then I have worked for British and international companies. I'm now based in Kecskemét, Hungary, and take on UK, Hungarian and other international clients.
2024–2026
Lead Fullstack React Native Engineer
As Lead Fullstack React Native Engineer I worked on SafestWay, which suggests the safest route for a walk at night, not the fastest. It works through millions of records on crime, street lighting and cameras. I designed how the whole system is built.
2026
Product Platform Engineer
As the only engineer, I had Staff-level responsibility for the mobile app, back-office tool and back end supporting a British digital bank's premium services. The content of five screens can be updated without releasing a new version of the app.
2026
AI Product and Cross-Platform Runtime Engineer
AI that runs on the device, on desktop and on mobile. The shared interface runs on Electron and Pear on desktop and on Expo on mobile, and it works without internet.
2025–2026
AI-First Lead React Native Developer
I led five mobile developers on Class IIa medical software for treating a rare disease, and brought four internal web products onto one UI foundation. The app worked offline and connected to a smart injector over Bluetooth. The code downloaded to the browser became 45% smaller and the app started 1.5 seconds faster.
2025
Senior Cross-Platform Engineer
I worked on a live sports streaming platform whose customers include UFC Fight Pass, WNBA League Pass and NWSL, and whose peak traffic exceeded 500,000 concurrent viewers. I built the navigation and controls for the tvOS and Android TV versions, and connected each device's own video player to the app for 4K streams.
2024–2025
Lead Product Engineer – Mobile, AI UX & Delivery
As lead product engineer I reworked the first steps of a digital therapy app, and 25% more users kept using it afterwards. I also added personalised GPT-4 suggestions. App builds took 40% less time, and I led the WCAG AA accessibility audit.
2025
UI/UX Frontend Engineer
Part-time, I built the interface for an online shop's catalogue. From the client's needs I made the Figma design on my own, then the React/Next.js interface, and I saw it through to handover. I designed the phone layout first.
2024
Lead Full-Stack Engineer
I worked with the team to rebuild an existing React property application using Next.js. Its dashboards showed building and tenant data as it changed.
2023–2024
Lead Fullstack React Native Development Expert
I led improvements to existing apps without a full rewrite. The apps shared one code repository and a server layer on a platform serving multiple customer organisations. I added face and fingerprint sign-in, and loading time fell from 10 seconds to 0.3 seconds.
2023
Senior Product Engineer
I worked on a system used by healthcare professionals in patient care: web interface, back end and shared interface components. I also looked at machine learning and OpenAI prototypes. The system ran on AWS, and about 60% less time went into building screens.
2023
React Native Contractor
I worked on a React Native app, automated the release of new versions and helped the other developers. Releases took 40% less time.
2021–2023
Senior React Native Developer
The mobile app was a website wrapped in an app, and we rebuilt it in React Native. Data on mobile and desktop updated in real time. The App Store rating went from 3.2 to 4.7, and bugs hitting live users fell by 98%.
2021
Senior React and React Native Engineer
I built a mobile and web app with secure mobile banking features from scratch, on new AWS infrastructure. The system reached 99.9% reliability.
2020–2021
Senior Software Engineer
In Manchester I designed the structure of the fashion retailer's mobile app from the ground up. According to my CV the app served millions of customers worldwide, and we tuned the flows for the Black Friday peak. We also used parts written separately for the phone in Swift and Kotlin. The app's rating went from 3.5 to 4.7.
2020
Freelance Web/Mobile Application Engineer
An enterprise dashboard in React/Next.js, a React Native app and interface design.
2020
React Native (TypeScript) Contractor
At a Manchester digital agency I worked on React Native apps in client projects. I reviewed code and automated how the apps were built and released.
2019–2021
React / React Native Contractor
We built apps from the ground up. We made interface components that could be reused in several places, and I helped the junior developers. Building the screens took 30% less time.
2019
Senior React / React Native Developer
In Manchester we turned the web app into a new mobile app for Android and iOS using React Native. Tests covered 100% of the code in the critical parts.
2018–2019
React Native and JavaScript Developer
In Manchester: a customer app for e-commerce in native Android and iOS, and a web app that worked offline.
2018
React / React Native Developer
In the Manchester area: a small team building for companies, working in short development stages. We rewrote the web app in React and the iOS app in React Native.
2015–2016
C# Developer
Industrial automation software in C# and .NET, in Kecskemét.