Jan Koriťák

Aviation training platform, greenfield rebuild — owned end-to-end including production tenant migration from v1. Designed tenant-isolated architecture via PostgreSQL row-level security and contract-first APIs across React web, Expo mobile, and Django backend. Custom Claude Code skills tuned to the stack; five engineers shipping at the velocity of more.

Voice agent SaaS for B2B hospitality — owned greenfield to production. Next.js dashboard, Python FastAPI voice agent on Deepgram + GPT-5, Expo mobile, Supabase + Stripe. Recovered intent accuracy and cut end-to-end latency from 5.2s to 1.2s over a weekend via an eval harness and Karpathy's autoresearch loop with Claude Code.

Four years across Alerting, Dashboard/Platform, and DBO teams (former VividCortex). Co-authored the Alerting module and the platform-level configurable dashboards framework reused across every product module. Stepped off in 2025 to commit fully to AI product work.

Hiring platform matching engineers with companies by open-source contribution scoring. Shipped, onboarded first users, never found PMF. Folded.

jQuery → typed React migration of the IMDG management portal — incremental rewrite, TDD, module-by-module, zero production disruption across a customer base of banks and telcos. Co-authored Hive, Hazelcast's open-source design system.

License-scanning SaaS — open-source scanner for npm, pip, Maven dependencies plus a SaaS on top. Couldn't raise when COVID hit. Folded.

Real-time cycling performance tracker — native mobile app with BLE hardware integration for Swiss cycling electronics maker. Early React Native + BLE when neither was stable. Designed the stack, shipped greenfield with a small team.

Frontend of the alerting module at a Nordic media intelligence platform — real-time brand and topic alerts to PR and communications teams.

Seat-selection module for one of Europe's largest online travel agencies. Cabin layouts rendered as SVG per aircraft, seat-level pricing, integrated into the existing checkout.

Event platform — full-stack features across web and React Native mobile, team of two, Firebase data layer.

Brno University of Technology.

Recovering a production voice agent with an eval harness and an autonomous Claude Code loop. 27-min deep dive at blog.jankoritak.com.

Comparison of RSC with SSR/SSG/ISR. Featured in This Week In React by Sebastien Lorber.

Co-hosted SolarWinds + senvio meetup in Brno. Presented React Server Components shortly after their release.

Merged PR fixing a path bug in the indexer (87K★).

Open-sourced design system behind Hazelcast Management Center. 20 merged PRs across accessible components.