09/08/2026 updated
100 % available
Senior Full-Stack Developer | Web, Mobile, AI & SaaS Solutions
Albuquerque, USA
Only remote
Bachelor of Science in Computer ScienceAbout me
Senior Full-Stack Developer building scalable Web, Mobile, AI, and SaaS solutions. Passionate about clean code, innovative products, and solving real-world problems.
BlockchainReact.jsBinanceEthereumSolidityReact Native
Full-Stack Web Development
Expertise in building scalable full-stack applications using React, Next.js, Node.js, TypeScript, and PostgreSQL, with a focus on clean architecture, reusable UI components, and RESTful backend services.
E-Commerce & Checkout Systems
Proficiency with Shopify, WooCommerce, and PrestaShop, covering product catalogs, payment flows, admin operations, and end-to-end commerce delivery from catalog to checkout.
DevOps & Cloud Infrastructure
Hands-on experience with Docker, CI/CD pipelines, AWS, Linux VPS, Nginx, systemd, and production monitoring, ensuring reliable deployments and backend stability.
Analytics & Conversion Tracking
Implementation of GA4, Google Tag Manager, Google Ads, and Meta CAPI tracking with data-layer and transaction-ID validation, including diagnosis of payment-session breaks and analytics mismatches.
Android Background Systems
Development of mobile services designed for long-running background operation using Kotlin, foreground services, AccessibilityService, audio capture, and on-device speech processing.
Database Management
Strong command of PostgreSQL, MySQL, MongoDB, and Redis, including schema design, query optimization, and database/API optimization for production environments.
Authentication & Security
Implementation of JWT/OAuth authentication, role-based access control, third-party API integrations, payment gateways, and secure integrations across web applications.
Agile & Software Engineering Practices
Experience working in Agile/Scrum teams across planning, code review, testing, deployment, and maintenance, applying Clean Code, SOLID, OOP, Design Patterns, and Unit/Integration Testing.
Frontend Technologies
Proficiency in React.js, Next.js, JavaScript, TypeScript, HTML5, CSS3, Tailwind CSS, and Redux for building responsive, accessible, and performant user interfaces.
Expertise in building scalable full-stack applications using React, Next.js, Node.js, TypeScript, and PostgreSQL, with a focus on clean architecture, reusable UI components, and RESTful backend services.
E-Commerce & Checkout Systems
Proficiency with Shopify, WooCommerce, and PrestaShop, covering product catalogs, payment flows, admin operations, and end-to-end commerce delivery from catalog to checkout.
DevOps & Cloud Infrastructure
Hands-on experience with Docker, CI/CD pipelines, AWS, Linux VPS, Nginx, systemd, and production monitoring, ensuring reliable deployments and backend stability.
Analytics & Conversion Tracking
Implementation of GA4, Google Tag Manager, Google Ads, and Meta CAPI tracking with data-layer and transaction-ID validation, including diagnosis of payment-session breaks and analytics mismatches.
Android Background Systems
Development of mobile services designed for long-running background operation using Kotlin, foreground services, AccessibilityService, audio capture, and on-device speech processing.
Database Management
Strong command of PostgreSQL, MySQL, MongoDB, and Redis, including schema design, query optimization, and database/API optimization for production environments.
Authentication & Security
Implementation of JWT/OAuth authentication, role-based access control, third-party API integrations, payment gateways, and secure integrations across web applications.
Agile & Software Engineering Practices
Experience working in Agile/Scrum teams across planning, code review, testing, deployment, and maintenance, applying Clean Code, SOLID, OOP, Design Patterns, and Unit/Integration Testing.
Frontend Technologies
Proficiency in React.js, Next.js, JavaScript, TypeScript, HTML5, CSS3, Tailwind CSS, and Redux for building responsive, accessible, and performant user interfaces.
Experience
Professional experience5 - 10 years
Freelancer since2015
Languages
EnglishFluentJapaneseNative speaker
Project history
Designed and developed scalable full-stack applications using React, Next.js, Node.js, TypeScript, and PostgreSQL. Built reusable, accessible UI components and RESTful backend services; designed schemas and optimized SQL queries. Implemented JWT/OAuth authentication, role-based access control, third-party APIs, payments, email services, and external integrations. Maintained Docker/CI/CD deployments on AWS, wrote automated tests, reviewed code, and resolved production performance and security issues.
Developed and maintained production applications with React, JavaScript, Node.js, Express, MySQL, and REST APIs. Converted UI/UX designs into responsive components and delivered dashboards, admin panels, authentication, and business workflows. Integrated payment gateways, cloud storage, notifications, and third-party services while improving frontend and API performance. Worked in Agile/Scrum teams across planning, code review, testing, deployment, debugging, and ongoing maintenance.
Built responsive websites and web applications using HTML, CSS, JavaScript, and React. Created reusable UI components, connected REST APIs, and supported Node.js/MySQL backend functionality. Resolved browser compatibility and UI defects while assisting with Git workflows, testing, deployment, and documentation.