Maksym P.

CTO-Level Engineering and Architecture for Desktop, Web, Mobile, and AI-Powered Apps 🚀 🤝 How I Work I work with AI-generated codebases and make them production-ready. I help founders and product teams turn MVPs into reliable apps, extend existing products, and finish projects with confidence. I use a modern, AI-assisted development workflow with Claude Code and Codex, supported by automated testing and CI/CD. I review AI-generated code, make the technical decisions, and take responsibility for what ships. Web application and SaaS development My full-stack development work includes customer portals, dashboards, admin panels, and subscription products. I connect React, Next.js, or Angular interfaces with Node.js APIs and PostgreSQL databases, including authentication, permissions, onboarding, and billing. For an existing SaaS platform, I can add features or take responsibility for ongoing development. Front-end development with React, Next.js, and Angular I build responsive interfaces in TypeScript and JavaScript, working with HTML and CSS to make complex forms, data tables, and dashboards usable across screen sizes. I also improve existing React and Angular applications through UI polish, performance fixes, and clearer user flows. Backend development and API integration I develop Node.js and NestJS backends, Python/FastAPI services, and PostgreSQL databases. API integration work includes Stripe subscriptions, external business services, and connections between frontend applications and REST or GraphQL APIs. I also work with Supabase when it fits the product. Electron desktop application development I build Windows and macOS applications with React or Angular interfaces. My Electron work includes native desktop recording, offline workflows, code signing, Apple notarization, automatic updates, and packaging. I also take over existing desktop applications to fix performance issues and prepare releases. AI app development and code review I integrate the OpenAI API into web applications and build features such as document extraction and workflow automation. For inherited codebases and AI-built prototypes, I review access controls, data handling, and the workflows that need attention before planning the next development milestone. Selected work • IslandMetrics: took over an AI-built Next.js SaaS and brought it to production. The stack included TypeScript, NestJS/Node.js, and PostgreSQL. I delivered hotel reporting dashboards, onboarding, permissions, and PDF exports. • Eviflow: full-stack web application development for a Swiss pharmacy platform using React, Next.js, Python/FastAPI, and PostgreSQL, with versioned consultation forms and role-based access. • Capsure: built AI invoice extraction, Stripe subscription billing, and a browser extension that fills government claim forms. The platform uses React and Angular interfaces. • Storylane: delivered an Electron desktop application using React for Windows and macOS, with native recording, code signing, notarization, and automatic updates. I clarify scope, explain technical trade-offs, and flag risks early. Send me your current stack, the application’s current state, and what you need to build or improve. We can start with a focused review or a defined first development milestone. Tech stack & skills Development: Full-Stack Development, Front-End Development, Backend Development, Web Application, Web Application Development, SaaS Development, MVP, Progressive Web App, Learning Management System. Frontend & UI/UX: JavaScript (Java Script), TypeScript, React (ReactJS, React.js), Next.js (NextJS), Angular, AngularJS, Vue.js, React Native, HTML, CSS, Tailwind CSS, Bootstrap, MUI (Material UI), Formik, TanStack Table, RTK Query, i18n, SurveyJS, Quill, Figma, Responsive Design, mobile-first, User Interface Design, User Experience Design. Motion: Motion, Framer Motion, GSAP, Lottie, SVG animation, interactive campaign sites. Backend & APIs: Node.js (NodeJS), NestJS (Nest.js), ExpressJS (Express.js), Python, FastAPI, API, API Integration, REST, GraphQL, webhooks, PostgreSQL, PostGIS, SQL, MongoDB, Supabase, Prisma, RxDB, IndexedDB, Casbin, Stripe, Resend. Desktop: Electron, ElectronJS, Electron.js, Desktop Application, Windows, macOS, Linux, Chrome Extensions, FFmpeg. AI: AI App Development, AI Development, AI Agent Development, AI Bot, AI Chatbot, Chatbot, OpenAI API, Claude Code, Codex, AI-assisted development. Delivery: Git, Vercel, AWS, Docker, CI/CD, automated testing, Code Review, Software Debugging, Core Web Vitals, Lighthouse, accessibility, security. Additional technologies: Swift, Flutter, ASP.NET Web API, Webflow API, Web3.