r
rat1la

Daniel

@rat1la
5.0(5)

I create things that make your life easier and better

Belarus
English, Russian
About me
🚀 Hi! I’m Daniel, a freelance developer & designer from Europe with 4+ years of experience building production-ready systems — from Telegram bots and backend services to mobile apps and UI/UX designs. 💡 I specialize in Java/Spring backend, mobile apps (Java/Kotlin/Flutter), Telegram bots, automation, and UI/UX design. I handle full project lifecycles, optimize high-load systems, and bring modern, creative solutions. ⚡ Let’s build something amazing! https://ratiladev.netlify.app... Read more

Skills

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rat1la
Daniel
Offline • 

Portfolio

Work experience

Java Developer

BelBot • Part-time

Dec 2021 - Jun 2025 • 3 yrs 6 mos

− Developed and maintained 15+ commercial Telegram/VK bots on Java + Spring Boot (from e-commerce to CRMs for salons and arbitrage projects). − Implemented Kafka in two projects to handle queues — prevented message loss under peak load. − Set up Docker + Kubernetes deployments — rollout time reduced from hours to 5–10 minutes. − Increased unit test coverage (JUnit 5 + Mockito) to 75–80% on key projects — regressions nearly eliminated. − Optimized a heavy algorithm for finding arbitrage paths — speed increased from 60–70 to 400+ operations in 25–30 seconds. − Managed projects end-to-end, from requirements to production.