Serhii P.

Full-Stack Product Engineer | SaaS Rescue | React & Node | AI

💯 PROVEN DELIVERY ✅ 100% Job Success on Upwork; ✅ 300+ software projects delivered since 2014;
 ✅ Experience across SaaS, CRM, e-commerce, subscriptions, fitness, customer-facing platforms and AI automation;
 ✅ End-to-end delivery across discovery, UX/UI, web, mobile, integrations, QA, and DevOps - backed by the Redlab team when needed. I help founders turn stalled SaaS products, inherited codebases, and AI-built prototypes into reliable software ready for real users. I assess the technical foundation, fix what is holding the product back, and take it all the way to production. You probably don’t need more code. You need the right technical decisions: what to keep, what to fix now, and what can wait. 💼 WHAT I TAKE OWNERSHIP OF I build products from the ground up, take prototypes to production, and stabilize or modernize existing platforms. I handle codebase and production-readiness audits, architecture and reliability improvements, full-stack development with React and Node.js, AI integrations and automation, launch, monitoring, and ongoing iteration. I do not recommend AI by default. If the problem is better solved through UX improvements, system integration, or simpler automation, I’ll say so. 🔝 WAYS TO WORK TOGETHER 1. Production Readiness Audit
Identify technical risks, launch blockers, and immediate priorities. 2. Codebase Rescue Sprint
Stabilize the product and resolve the most critical technical issues. 3. Product Engineering Partnership
Ongoing product development through launch and post-launch iteration. 📈 WHERE I ADD VALUE 💻 FULL-STACK PRODUCT & PLATFORM DEVELOPMENT • SaaS products, MVPs, and customer portals
 • Subscription, membership, booking, and payment systems • Web and React Native applications, CRM, admin tools, and dashboards
 • API architecture, integrations, modernization, scaling, and ongoing development 🤖 AI AGENTS & AUTOMATION I identify workflows where automation or embedded AI can reduce manual work, improve operations, or create a better customer experience. • AI agents for support, sales, onboarding, and operations
 • CRM and internal workflow automation
 • RAG assistants, knowledge search, and document processing
 • Embedded AI features, personalization, and recommendations
 • Human approval, access controls, monitoring, and cost management I do not recommend AI by default. If better UX, system integration, or simpler automation is the stronger solution, I will say so. CORE TECHNOLOGIES React, Next.js, Vue, Nuxt, Node.js, Laravel, PHP, React Native, PostgreSQL, MySQL, MongoDB, Redis, REST APIs, WebSockets, OpenAI, Claude, RAG, and vector databases. YOUR NEXT STEP You do not need to determine in advance whether the right solution is custom development, systems integration, automation, or AI. 📩 Send me a brief overview of your business, current product or workflow, and the outcome you want to achieve. We will start with the business challenge, identify the highest-value opportunity, and define the right technical path forward. Last updated: 08.09.2026