Sergii –

Sergii is a middle-to-senior full-stack engineer with 10 years of experience in Node.js, TypeScript, React/Next.js, PostgreSQL, and AWS. He has led backend architecture and CRM integrations, shipped production AI features, and contributed to both startups and large-scale SaaS platforms. Strengths include backend design, integration, and AI workflow automation. Communication is collaborative but can be fragmented under pressure; frontend React depth is developing.