👋 I am a Senior Java Developer • Contractor • Freelancer 𝐰𝐢𝐭𝐡 7+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢�...

Oleg is a decisive, results-focused, and action-oriented professional with a solid theoretical background in software development, primarily...

20+ extensive experience and expertise in many areas: backend, hi-load system, big data, cluster computation, security, optimization, full c...