Oleh B.

I'm a Full-Stack Software Engineer with 𝟏𝟎+ 𝐲𝐞𝐚𝐫𝐬 of commercial experience building custom web platforms, enterprise software, SaaS products, internal business systems, marketplaces, CRM/ERP solutions, and mobile applications. Over the years I've worked with different technology stacks depending on business needs, allowing me to quickly adapt to existing projects as well as architect new ones from scratch. 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝: I develop modern, responsive applications using React, Next.js, Angular, React Native, TypeScript, JavaScript, Redux Toolkit, TanStack Query, RxJS, HTML5, CSS3, SCSS, Tailwind CSS, Material UI, Bootstrap, and integrate complex REST and GraphQL APIs into scalable user interfaces. 𝐁𝐚𝐜𝐤𝐞𝐧𝐝: My backend experience includes building APIs, business logic, authentication systems, payment integrations, and admin panels with Node.js, NestJS, Express.js, PHP, Symfony, Yii2, Pimcore, working with REST APIs, GraphQL, JWT, OAuth, WebSockets, Redis, RabbitMQ, Docker, and modern software architecture. 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬 & 𝐂𝐥𝐨𝐮𝐝: I'm experienced with PostgreSQL, MySQL, MongoDB, MariaDB, Firebase, Supabase, database optimization, caching, cloud storage, third-party API integrations, and scalable backend infrastructure. 𝐌𝐨𝐛𝐢𝐥𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Besides web development, I build cross-platform React Native applications for iOS and Android, including authentication, push notifications, payments, offline mode, BLE, camera, maps, media uploads, background services, AI integrations, and App Store / Google Play deployment. 𝐃𝐨𝐦𝐚𝐢𝐧𝐬: I've contributed to products in SaaS, FinTech, Healthcare, E-commerce, Enterprise Software, Real Estate, Manufacturing, Logistics, Education, AI, Marketplaces, CRM, ERP, CMS, PIM, and Digital Commerce, working with startups, SMBs, and enterprise clients. 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐖𝐨𝐫𝐤𝐟𝐥𝐨𝐰: My daily toolkit includes Git, GitHub, GitLab, Docker, Jira, Linear, Figma, Postman, Xcode, Android Studio, VS Code, PhpStorm, along with modern AI development tools like Claude, Cursor, and ChatGPT to speed up development while maintaining code quality. 𝐖𝐡𝐞𝐭𝐡𝐞𝐫 𝐲𝐨𝐮 𝐧𝐞𝐞𝐝 𝐭𝐨 𝐞𝐱𝐭𝐞𝐧𝐝 𝐚𝐧 𝐞𝐱𝐢𝐬𝐭𝐢𝐧𝐠 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦, 𝐦𝐨𝐝𝐞𝐫𝐧𝐢𝐳𝐞 𝐚 𝐥𝐞𝐠𝐚𝐜𝐲 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧, 𝐛𝐮𝐢𝐥𝐝 𝐚 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐒𝐚𝐚𝐒 𝐩𝐫𝐨𝐝𝐮𝐜𝐭, 𝐨𝐫 𝐝𝐞𝐯𝐞𝐥𝐨𝐩 𝐚 𝐦𝐨𝐛𝐢𝐥𝐞 𝐚𝐩𝐩 𝐟𝐫𝐨𝐦 𝐬𝐜𝐫𝐚𝐭𝐜𝐡, 𝐈 𝐜𝐚𝐧 𝐪𝐮𝐢𝐜𝐤𝐥𝐲 𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐞 𝐢𝐧𝐭𝐨 𝐲𝐨𝐮𝐫 𝐭𝐞𝐚𝐦 𝐚𝐧𝐝 𝐝𝐞𝐥𝐢𝐯𝐞𝐫 𝐫𝐞𝐥𝐢𝐚𝐛𝐥𝐞, 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧-𝐫𝐞𝐚𝐝𝐲 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬.