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Lénárd-Sándor Tunya

@lnrd-sndortunya

Junior software engineer building crwsync, a real-time collaboration platform tested at ~40,000 deliveries/s with zero message loss.

Romania

Message

What I'm looking for

I'm an M.Sc. student available for part-time or full-time work remotely.

I built crwsync, a real-time collaboration platform, with shared TypeScript types across its Next.js apps and NestJS API. Its Socket.IO and Redis Pub/Sub sync was load-tested on six instances at ~40,000 deliveries/s with zero message loss and 409 ms p99 latency.

I deployed crwsync on Docker Swarm and set up GitHub Actions CI/CD to run Jest unit tests and Playwright end-to-end tests before each release. I also integrated Claude-powered features that summarize conversations, create tasks from messages, and generate task-board digests.

With KROMA, I built an online ordering platform and barista Kitchen Display System for a coffee shop. I automated order processing with verified Stripe webhooks and Vercel Cron jobs calling PostgreSQL functions to update stock and opening hours.

At Codespring, I developed the chat interface for an AI chatbot app in React Native and connected it to a backend REST API. At Egnosis, I implemented Flutter and Dart screens, connected them to GraphQL APIs, and tested the app on physical iOS and Android devices.

Experience

Work history, roles, and key accomplishments

Student Developer

Codespring

Oct 2024 - Jan 2025 (3 months)

Developed the chat interface of an AI chatbot app in React Native and connected it to the backend REST API. Implemented in-app camera capture and media upload with Expo modules.

React Native REST APIs Expo TypeScript

Mobile Development Intern

Egnosis

Jul 2024 - Aug 2024 (1 month)

Connected screens to GraphQL APIs and handled client-side data fetching, loading states, and rendering. Implemented Login, Navigation, and News screens in Flutter and Dart, translating Figma designs into responsive layouts.

Flutter Dart GraphQL Figma iOS Android

Education

Degrees, certifications, and relevant coursework

Babes-Bolyai University

Master of Science, Enterprise Software Design and Development

2026 -

Pursuing a Master of Science in Enterprise Software Design and Development, expected to graduate in July 2028.

Babes-Bolyai University

Bachelor of Science, Computer Science

2022 - 2026

Activities and societies: Presented thesis research at the XXIX. ETDK (Transylvanian Scientific Students' Associations Conference), Informatics II section.

Completed a Bachelor of Science in Computer Science, with a thesis on the design and development of a scalable, real-time collaborative platform.