Volodymyr Yefremov

Cross-platform mobile applications (iOS + Android) built with React Native, paired with a comprehensive web admin panel. Complete mobile solution including: React Native app development with native modules, RESTful API backend (Laravel/Node.js), user authentication (JWT, biometric login), push notifications (Firebase FCM, OneSignal), offline mode with local data sync, camera/gallery integration, geolocation and maps, in-app purchases (StoreKit, Google Play Billing), social media sharing, deep linking, app analytics (Firebase Analytics, Mixpanel), crash reporting (Sentry, Crashlytics), web admin panel for content/user management, real-time dashboard with statistics, CMS for app content, user management and moderation, push notification composer, analytics reports, and API documentation. Deployment support: App Store submission (iOS Developer account setup assistance), Google Play Console setup, ASO optimization, privacy policy generation, and compliance guidance (GDPR, CCPA). Optional: WebSocket real-time features, video streaming, payment integration, Bluetooth/ IoT connectivity, AR features. 3+ years React Native experience with 15+ apps published on both stores. Average app rating: 4.6+ stars.

Professional business websites that convert visitors into customers. Full-service development including: discovery call to understand your business goals and target audience, custom design mockups (Figma/Adobe XD), responsive development (mobile-first approach), CMS setup (WordPress or Laravel-based), contact forms with spam protection, Google Analytics 4 integration, basic on-page SEO (meta tags, schema markup, sitemap), fast hosting configuration (Vite, CDN), SSL certificate setup, Google Business Profile optimization, and 1-hour training session on content management. Optional: multilingual support (5 languages), blog setup, newsletter integration (Mailchimp), and ongoing maintenance packages. Delivery includes source files, documentation, and 30 days of free support.

Modern, responsive single-page applications (SPA) built with Vue.js 3 and Composition API. I specialize in creating fast-loading, SEO-friendly interfaces with Vue Router for navigation, Pinia/Vuex for state management, and seamless integration with Laravel backends. Services include custom component development, reactive forms with validation, real-time updates via WebSocket/Centri fugo, progressive web app (PWA) features, Tailwind CSS styling, Alpine.js interactions, and performance optimization (lazy loading, code splitting). All code follows Vue best practices with TypeScript support available.

Professional admin panels and dashboards built on Filament v4 (Laravel). I deliver complete backend management solutions with beautiful, intuitive interfaces. Features include: CRUD resources with advanced filtering and sorting, data tables with bulk actions, custom form fields and validators, export/import (Excel, CSV, PDF), custom widgets and statistics, role-based access control (RBAC), media library integration, real-time notifications, audit logging, multi-language support, and custom theme development. Perfect for SaaS platforms, e-commerce management, CRM systems, and internal business tools. 2+ years of Filament production experience.

Enterprise-grade RESTful and GraphQL API development with comprehensive documentation. I build scalable APIs with Laravel Sanctum/Passport authentication, OAuth2 support, rate limiting, request validation, API versioning, and OpenAPI/Swagger documentation. Third-party integrations include: payment gateways (Stripe, PayPal, WayForPay, Fondy), email services (SendGrid, Mailgun, AWS SES), SMS providers (Twilio, TextLocal), CRM systems (HubSpot, Salesforce), shipping APIs, social login (Google, Facebook, Apple), and cloud storage (S3, Cloudinary). Redis caching for sub-100ms response times, webhook implementation, queue-based async processing, and API analytics. Mobile-ready with JSON:API specification support.

Full-featured service marketplace platform connecting clients with service providers (similar to Fiverr, Upwork, or TaskRabbit). Complete solution built on Laravel + Vue.js with real-time features. Core functionality: user registration with email/Social login (Google, Facebook), dual-role accounts (client/provider profiles), service listing creation with galleries and pricing, advanced search with filters (category, price, location, rating), service ordering workflow with milestones, secure payment processing (escrow system, Stripe Connect), real-time messaging (Centrifugo WebSocket), file sharing in chat, video call integration (optional), review and rating system with moderation, dispute resolution center, notification system (email, push, in-app), favorites/wishlist, order tracking dashboard, earnings reports for providers, admin panel for user/content management, commission management, payout system, KYC verification, and comprehensive analytics. Optional: subscription plans, featured listings, geo-location services, mobile apps (React Native). 4+ years marketplace development experience with 10+ platforms launched. Scalable architecture supporting 10,000+ concurrent users.

Complete e-commerce solution ready to launch and start selling. Built on Laravel with Vue.js frontend for optimal performance. Features include: product catalog with unlimited categories, advanced filtering (price, attributes, tags), product variants (sizes, colors), inventory management with low-stock alerts, shopping cart with persistent storage, multi-step checkout, payment gateway integration (Stripe, PayPal, WayForPay, Fondy), shipping calculator (Nova Poshta, Ukrposhta, international), order management dashboard, customer accounts with order history, wishlist functionality, product reviews and ratings, discount codes and promotions, email notifications (order confirmation, shipping updates), admin panel for complete store management, SEO optimization, Google Analytics & Facebook Pixel integration, and mobile-responsive design. Optional: multi-vendor marketplace, subscription products, B2B wholesale pricing, POS system integration. 3+ years e-commerce development experience with 20+ stores launched.

Custom CRM system tailored to your business workflows. Built on Laravel with modern Vue.js interface. Core features: centralized client database with complete interaction history (calls, emails, meetings), visual sales pipeline with drag-and-drop deal stages, task management with assignments and deadlines, automated reminders (email, in-app, Telegram), calendar integration (Google Calendar, Outlook), document storage and e-signature support, team collaboration tools (internal comments, @mentions), customizable dashboards with KPI widgets, advanced reporting (sales funnel, conversion rates, team performance), role-based access control with granular permissions, API for third-party integrations (accounting, email marketing, telephony), mobile-responsive design, data import/export, audit logs, and automated backups. Optional: AI-powered lead scoring, chatbot integration, WhatsApp Business API, predictive analytics. Perfect for sales teams, real estate agencies, consulting firms, and service businesses. 5+ years CRM development experience.

Single-page websites engineered to maximize conversions and generate leads. I combine proven copywriting frameworks (AIDA, PAS, BAB) with conversion-focused design principles. Deliverables include: compelling headline and value proposition, benefit-oriented copywriting, strategic CTA placement, trust elements (testimonials, case studies, certifications), lead capture forms with validation, exit-intent popups, urgency/scarcity elements, mobile-optimized responsive design, fast loading (<2 seconds, 90+ PageSpeed score), A/B testing setup (Google Optimize), heatmap tracking (Hotjar), Google Analytics 4 with conversion goals, Facebook Pixel & Google Ads tracking, email marketing integration (Mailchimp, SendGrid, ActiveCampaign), CRM integration (HubSpot, Pipedrive), SSL certificate, hosting setup, and 30-day performance monitoring. Optional: video production, professional photography, multilingual versions, chatbot integration. Average conversion rate improvement: 40-150%. 50+ landing pages delivered with proven results.

Reliable ongoing maintenance and support for your Laravel/Vue.js applications. Keep your website secure, fast, and up-to-date with professional maintenance services. Services include: bug fixes and troubleshooting (24-48h response time), security updates and patches, Laravel/framework version upgrades, dependency updates (Composer, npm), performance monitoring and optimization, database optimization and cleanup, backup management and disaster recovery, SSL certificate renewal, uptime monitoring (99.9% SLA), content updates (text, images, products), small feature additions, third-party integration maintenance, Google Analytics/Search Console monitoring, technical support via email/Telegram, monthly performance reports, and priority support for retainer clients. Available as hourly packages or monthly retainers (10/20/40 hours). All work tracked in your project management system (Jira, Trello, Asana) with detailed time logs. 8+ years production support experience with 99.9% client retention rate.

Transform your legacy or poorly-performing codebase into clean, efficient, maintainable software. I provide comprehensive code audit using static analysis tools (PHPStan, Psalm), identify performance bottlenecks with profiling (Blackfire, Xdebug), refactor spaghetti code following SOLID principles and design patterns, optimize N+1 queries with eager loading, implement database indexing strategies, add comprehensive PHPUnit/Pest test coverage, configure CI/CD pipelines, and document architecture decisions. Specializing in Laravel applications with 1000+ refactoring hours completed. Results: 5-10x faster page loads, 80%+ test coverage, reduced server costs.

Complete web application development on Laravel with 8 years of expertise. I'll build your project from scratch following best practices: clean architecture, SOLID principles, comprehensive testing, and scalable database design. Includes RESTful API development, secure authentication system, admin panel (Filament or custom), modern Vue.js frontend, third-party integrations (payment gateways, email services, SMS), performance optimization, and deployment assistance. Perfect for startups, MVPs, and enterprise applications requiring robust backend infrastructure.