Valery M.

$4M+ earned on Upwork. 27+ years, 600+ projects, and platforms serving 20M+ users. I build production-grade SaaS, CRM, ERP, marketplaces, automation & AI systems with PHP, React, Python and modern cloud architecture - built to last, not patched together.

Senior Full Stack Developer leading a veteran Full Stack Development team for production-ready SaaS platforms, web applications, CRM, ERP, Marketplace Platforms, automation, and AI-powered applications. We work across full-stack development, web development, web application development, modern web products, B2B SaaS, SaaS applications, production SaaS, web and mobile products, and existing production systems.

Results:

• 100+ SaaS and CRM platforms launched from scratch
• 300+ automation tools built
• 150+ POS, Web-to-Print, and location-aware applications delivered
• platforms serving 20M+ users with 99.99% uptime
• ERP Systems reducing operational overhead by 40%+
• web automation saving 1,000+ hours per month per client

Our stack includes Laravel, PHP; Python, Django; React, Next.js; React / Next.js; Next.js, React; React, TypeScript; Next.js, TypeScript; React, Node.js; Node.js, Express.js; PostgreSQL, MySQL; MongoDB, PostgreSQL; AWS, Docker; AWS, Vercel; Tailwind CSS; Redis; GCP; GraphQL; React Native; HTML, CSS; and Node.js, Python.

Frontend: React, Next.js, TypeScript, App Router, Tailwind CSS, responsive web interfaces, and modern frontend tooling. Backend: Node.js, Express.js, Python, PHP. Our backend development covers backend services across frontend, backend, APIs, databases, data sources, background jobs, frontend and backend systems, front-end and back-end product layers, relational database environments, and relational databases.

We handle API Development, API development, REST APIs, REST API, API Integration, API integrations, API design, GraphQL APIs, third-party integrations, third-party APIs, APIs and third-party integrations, AI APIs, LLM APIs, Authentication and authorization, Secure authentication, role-based access, billing engines, reporting pipelines, and workflow automation.

Architecture matters. We design Scalable Architecture, clean architecture, Event-driven architecture, Multi-tenant systems, multi-tenant SaaS, SaaS architecture, application architecture, technical architecture, database architecture, database design, data model planning, architectural decisions, cloud infrastructure, production systems, production applications, production web applications, and Production deployment. We also handle code quality, code reviews, Automated testing, CI/CD pipelines, GitHub Actions, GitHub repository workflows, and ongoing maintenance.