Track Record
Frontend engineer, full-stack capable. React/TypeScript core, Python when needed. Shipped across industries through senvio — from enterprise observability to cycling hardware to media intelligence to aviation training systems and voice AI. Led small teams, oversaw numerous web projects, mobile apps, and AI agents as technical lead.
Projects
Greenfield aviation Training Management System — LMS → full-blown TMS. Designed the architecture: Turborepo monorepo, Django + React + Expo, PostgreSQL RLS multi-tenancy, contract-first API with auto-generated clients. Set up AI-first development with 8 specialized Claude Code agents and CI/CD from day one. Leading a team of 4.
Voice agent SaaS for B2B restaurants — designed architecture, set up monorepo. Next.js dashboard, Python FastAPI voice agent, Expo mobile app. Supabase + Stripe.
Media intelligence & sponsorship sales SaaS — news-based lead generation platform analyzing 235k+ sources for buying signals. Fine-tuned AI system prompts for auto-outreach and pitch workflows.
Alerting → Dashboard/Platform → DBO (former VividCortex). Built core Alerting module, co-authored configurable dashboard framework. Post-acquisition, joined the DBO team. Senior engineer across 3 product areas.
Co-founded hiring platform — matched engineers with companies by open-source contribution scoring. Built and shipped. Failed startup.
jQuery → typed React migration of IMDG management portal. TDD, module-by-module, zero production disruption. Also co-authored the Hive design system — 20 merged PRs building accessible components (Button, Badge, Alert, Toast, Dialog, Select, DateTimePicker).
Co-founded license scanning SaaS — tried to raise VC when COVID hit. Failed startup.
Real-time cycling performance tracker — native mobile app with BLE hardware integration. Early RN + BLE when neither was stable. Greenfield to production, designed the stack, shipped with a team of 3.
Media intelligence platform — built Alerting module end-to-end, full feature ownership from design to production.
Web + mobile event platform — full-stack build, NoSQL schema design, DX from scratch. Own features end-to-end, ship with a team of 2.
Talks & Writing
Co-hosted SolarWinds + senvio meetup at Cafe Prah, Brno. Presented React Server Components after their release.
Deep dive into React Server Components after their release.
Comparing RSC with SSR/SSG/ISR. Featured in This Week In React by Sebastien Lorber.
11+ articles across blog.jankoritak.com, dev.to, and senvio.com/blog. Writing about React internals, rendering strategies, performance, and developer tooling.
Open Source
20 merged PRs building accessible design system components (Button, Badge, Alert, Toast, Dialog, Select, DateTimePicker).
Open-source license compliance scanner. npm, pip, Maven support.
2 merged PRs: strict TypeScript migration, special characters path fix.
Merged PR for geodistance service options.
Side Projects
Prediction market trading system. PnL tracking, cash flow optimization, profitability analysis.
Next.js demo showing prompt injection via markdown input. AI security awareness.
Plus LLM model routing gateways, hackathon MVPs, Raycast extensions, scrapers, Slack bots, and a growing list of things that shouldn't have been built at 2 AM.