Denis Varennikov

Skilled Backend Developer with 5+ years of experience in building scalable backend systems. Proficient in Node.js, PHP,Ruby on Rails , Go , Python , C#, Java and Rust , focusing on API design , cloud infrastructure , and databaseoptimization . Experienced in both remote and hybrid environments for international companies, delivering high-qualitysolutions in agile teams. Passionate about optimizing system performance and ensuring reliability.