Ilija Košanin
Fullstack Software Engineer (TypeScript)
Open to work · TypeScript & AI · remote or Belgrade
Architect of Enchantment
Fullstack TypeScript engineer with 4+ years of experience building products end to end. Hands-on experience in AI product development: chat interfaces, streaming, and structured content generation with the Vercel AI SDK and the OpenAI API.
I am a co-organizer of JS Belgrade, the local JavaScript community. We organize meetups, find speakers, handle sponsorships, and bring people together around JavaScript in Belgrade.
I am co-founder of Kosmonaut, a platform and pass for coworking spaces. Part-time, I act in short, fun, and silly videos on social media. I love writing, and I have a full blog section you can check out.
4+ years of experience
Co-founder of Kosmonaut
Fullstack Software Engineer @ EvolveWell
Jul 2024 – Jul 2026
Belgrade, Serbia (Remote)
- Built an employee wellness platform: owned features end to end across two Next.js frontends and a NestJS backend — UI, business logic, and database queries — in a system that also included a dedicated AI service integrating the OpenAI API.
- Developed an AI-first coaching application on TanStack Start (deployed on Vercel) pairing a chat interface with classic UI; implemented streaming, AI content generation, and structured outputs with the Vercel AI SDK.
- Delivered a product for frontline workers: drove the TanStack Start web app on Neon Postgres with shadcn/ui, shipped alongside an Expo / React Native iOS and Android mobile app; researched and prototyped a RAG approach for the product's knowledge features.
Software Developer @ PlusPlus NT
Apr 2022 – Jul 2024
Belgrade, Serbia
- Lead engineer for key clients (G4S, RTS): gathered requirements directly from clients, translated them into features, and owned delivery and bug resolution.
- Built document management and enterprise solutions with Spring, Angular, Alfresco, PostgreSQL, and Apache Solr.
Co-Organizer @ JS Belgrade
Feb 2024 – Present
Co-organizing meetups for the local JavaScript community: event planning, speaker outreach, and sponsorships.
Earlier
One year of full-cycle SaaS sales in parallel roles (Generation Zeal, Talks and Folks): prospecting, cold outreach, discovery calls, pipeline, closing. Competitive debater.
Skills
TypeScript · React · Next.js · TanStack Start · React Native (Expo) · Node.js · NestJS · PostgreSQL / Neon · Tailwind CSS + shadcn/ui · Vercel AI SDK · OpenAI API · RAG · Angular · Spring
Education
2015 – 2021
Engineer's degree, Information Technology, Faculty of Organizational Sciences, University of Belgrade
Languages: Serbian (native) · English (professional)