Serhii Viunnikov

About Me I’m a software engineer and mentor with over 20 years of experience in the IT industry. I hold a degree in engineering mathematics, and over the years, I've worked on a wide range of projects — from startups to enterprise-level systems — with a core focus on Java and related technologies. ⠀ Throughout my career, I’ve conducted hundreds of technical interviews for roles ranging from Junior to Lead, which gives me a clear understanding of what companies are really looking for at each stage of a developer’s journey. ⠀ Mentorship is a big part of who I am. I’ve taught complete beginners, including adults without a technical background and teenagers, and helped many junior developers find their way in tech. My approach is always structured and goal-oriented: we define a goal, build a plan, track progress, and adjust when needed. ⠀ I’m here to make things clear, practical, and focused — and to help you grow, not just learn. What I Can Offer 💡 If you’re just starting to explore IT I’ll explain different career paths and roles Help you understand if IT is the right fit for you Give you a clear starting point and avoid overwhelm 👨‍💻 If you want to learn Java from scratch I’ll guide you through the basics of programming Teach Java step by step, in a clear and logical way Break down complex concepts into simple ideas 🌐 If you're ready to go beyond the basics I’ll introduce you to web development fundamentals Teach you relational databases and SQL Show you how to apply your knowledge in real projects 🔍 If you have a pet project or want a strong GitHub profile I can review your code and suggest improvements Help you refine or refactor your project Or suggest a new idea that will stand out in your portfolio 📊 If you're already coding and want to level up I’ll assess your current skill level (Junior / Middle / Senior) Identify weak points and build a personalized learning plan Help you prepare for technical interviews with mock tests and real fee