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Johnny H.

@Coredev794

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Full Stack Developer | Web + Mobile + AI Solutions

$60 USD / Hour

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United States (3:50 AM)

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Joined on August 18, 2025

$60 USD / Hour

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Senior Full Stack Developer specializing in Web Applications, Mobile Apps, and AI Integration - 7+ Years Experience Building Scalable Digital Solutions About Me Passionate senior full stack developer with over 10+ years of experience transforming ideas into powerful digital solutions. I specialize in creating seamless web applications, native mobile apps, and integrating cutting-edge AI technologies to solve real business problems. What sets me apart: End-to-end development expertise from concept to deployment Proven track record with 150+ successful projects delivered AI integration specialist with experience in machine learning and LLMs Performance optimization expert achieving 40% faster load times on average Client satisfaction rate of 98% with long-term partnerships I believe great software isn't just about code - it's about understanding your business goals and delivering solutions that drive real results. Whether you need a responsive web application, a cross-platform mobile app, or AI-powered features, I bring both technical expertise and strategic thinking to every project. Core Technical Skills Frontend Development: React.js, Next.js, Vue.js, Angular TypeScript, JavaScript ES6+ HTML5, CSS3, SASS, Tailwind CSS Responsive design and mobile-first approach Progressive Web Apps (PWA) Backend Development: Node.js, Express.js, NestJS Python (Django, FastAPI, Flask) PHP (Laravel, CodeIgniter) RESTful APIs and GraphQL Microservices architecture Mobile Development: React Native (iOS and Android) Flutter (Dart) Native iOS (Swift) and Android (Kotlin) Cross-platform optimization App Store and Google Play deployment AI & Machine Learning: OpenAI GPT integration and fine-tuning TensorFlow and PyTorch Computer Vision and NLP Chatbot development AI-powered recommendation systems LangChain and vector databases Database & Cloud: MongoDB, PostgreSQL, MySQL, Redis AWS, Google Cloud, Azure Docker, Kubernetes CI/CD pipelines Serverless architecture Why Choose Me Technical Excellence: Writing clean, maintainable, and scalable code Following industry best practices and design patterns Staying current with latest technologies and frameworks Comprehensive testing and quality assurance Business Focus: Understanding your market and user needs Providing strategic technical recommendations Optimizing for performance, security, and scalability Delivering solutions that drive measurable business results Communication & Collaboration: Daily progress updates and transparent communication Flexible working hours to accommodate different time zones Collaborative approach with your existing team Post-launch support and maintenance Let's Build Something Amazing Together Ready to turn your vision into reality? I'm here to help you build robust, scalable, and innovative digital solutions that give you a competitive edge. I'm excited to learn about your vision and show you how we can bring it to life with cutting-edge technology and proven development practices.

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Experience

Senior Full-Stack Developer

Oct, 2024 - Present

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1 year

T-Mobile

Oct, 2024 - Present

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1 year

Implemented intelligent chatbot system that handles 80% of customer inquiries automatically while seamlessly escalating complex issues to human agents. Developed a telemedicine app serving 10,000+ users with features like video consultations, appointment scheduling, and AI symptom checker. Achieved 4.8-star rating on both app stores.

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Alhambra, United States

Oct, 2024 - Present

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1 year

Full-Stack Developer

Jan, 2018 - Oct, 2024

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6 years, 9 months

AT&T

Jan, 2018 - Oct, 2024

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6 years, 9 months

Built a complete e-commerce solution with AI-powered product recommendations that increased sales by 35%. Features included real-time inventory management, payment gateway integration, and predictive analytics dashboard.

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Walnut, United States

Jan, 2018 - Oct, 2024

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6 years, 9 months

React Developer

Apr, 2016 - Dec, 2016

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8 months, 1 day

Surefront

Apr, 2016 - Dec, 2016

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8 months, 1 day

Created a comprehensive business intelligence platform with real-time data visualization, automated reporting, and machine learning insights. Reduced client decision-making time by 50%.

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Los Angeles, United States

Apr, 2016 - Dec, 2016

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8 months, 1 day

Education

California State University-Los Angeles

2012 - 2016

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4 years

Bachelor of Computer Science

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United States

2012 - 2016

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4 years

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