Istvan took substantial ownership of the mobile experience at Credo, working across our React Native application, onboarding and GPT-4-powered personalised recommendations. He thought through the details that matter in a live product: response times, usage costs, how the recommendations fitted into the user journey, and how we would measure their impact.
He also rebuilt the mobile build and release workflow, cutting build times by 40%. That breadth was particularly valuable in a small team, where the same person often needs to make a technical decision and see it through to release.
I could trust him to work independently, raise issues early and follow through. I would absolutely work with him again.