- Senior Full Engineer with 9+ years of extensive experience in developing and maintaining high-performance web applications. - Senior Mobile App Developer with 6+ years of extensive experience in developing mobile app using React Native, Ionic, Flutter and Expo. - Experienced in developing web and mobile app using Firebase and Supabase. - Demonstrated expertise in leveraging modern JavaScript frameworks including React, Vue.js, Angular, and Next.js to build scalable and maintainable frontend solutions. - Strong experience with advanced CSS frameworks and libraries such as Tailwind CSS, Material UI, and Bootstrap to ensure responsive and visually appealing interfaces. - Demonstrated expertise in developing scalable and maintainable backend solutions using Node.js, PHP, Python languages. - Developed a robust AI applications using Langchain, LLM and AI services like AWS bedrock, Azure AI and OpenAI. - Adept at integrating RESTful APIs and GraphQL endpoints, ensuring seamless data flow and dynamic user experiences. - Extensive knowledge in building and maintaining CI/ CD pipelines using Jenkins, Docker, and Kubernetes. - Experienced in deploying and managing applications on cloud platforms like AWS, Azure, and GCP. - Strong command of version control using Git, GitHub, and GitLab. - Excellent problem-solving skills and a proactive approach to overcoming technical challenges. - Strong communicator and team player, dedicated to contributing positively to collaborative development environments and ensuring project success.…

Juan Lopez

PRO

- Senior Full Engineer with 9+ years of extensive experience in developing and maintaining high-performance web applications. - Senior Mobile App Developer with 6+ years of extensive experience in developing mobile app using React Native, Ionic, Flutter and Expo. - Experienced in developing web and mobile app using Firebase and Supabase. - Demonstrated expertise in leveraging modern JavaScript frameworks including React, Vue.js, Angular, and Next.js to build scalable and maintainable frontend solutions. - Strong experience with advanced CSS frameworks and libraries such as Tailwind CSS, Material UI, and Bootstrap to ensure responsive and visually appealing interfaces. - Demonstrated expertise in developing scalable and maintainable backend solutions using Node.js, PHP, Python languages. - Developed a robust AI applications using Langchain, LLM and AI services like AWS bedrock, Azure AI and OpenAI. - Adept at integrating RESTful APIs and GraphQL endpoints, ensuring seamless data flow and dynamic user experiences. - Extensive knowledge in building and maintaining CI/ CD pipelines using Jenkins, Docker, and Kubernetes. - Experienced in deploying and managing applications on cloud platforms like AWS, Azure, and GCP. - Strong command of version control using Git, GitHub, and GitLab. - Excellent problem-solving skills and a proactive approach to overcoming technical challenges. - Strong communicator and team player, dedicated to contributing positively to collaborative development environments and ensuring project success.…

Available to hire
  • Senior Full Engineer with 9+ years of extensive experience in developing and maintaining high-performance web applications.
  • Senior Mobile App Developer with 6+ years of extensive experience in developing mobile app using React Native, Ionic, Flutter and Expo.
  • Experienced in developing web and mobile app using Firebase and Supabase.
  • Demonstrated expertise in leveraging modern JavaScript frameworks including React, Vue.js, Angular, and Next.js to build scalable and maintainable frontend solutions.
  • Strong experience with advanced CSS frameworks and libraries such as Tailwind CSS, Material UI, and Bootstrap to ensure responsive and visually appealing interfaces.
  • Demonstrated expertise in developing scalable and maintainable backend solutions using Node.js, PHP, Python languages.
  • Developed a robust AI applications using Langchain, LLM and AI services like AWS bedrock, Azure AI and OpenAI.
  • Adept at integrating RESTful APIs and GraphQL endpoints, ensuring seamless data flow and dynamic user experiences.
  • Extensive knowledge in building and maintaining CI/ CD pipelines using Jenkins, Docker, and Kubernetes.
  • Experienced in deploying and managing applications on cloud platforms like AWS, Azure, and GCP.
  • Strong command of version control using Git, GitHub, and GitLab. - Excellent problem-solving skills and a proactive approach to overcoming technical challenges.
  • Strong communicator and team player, dedicated to contributing positively to collaborative development environments and ensuring project success.
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Skills

Experience Level

React JS
Expert
JavaScript
Expert
API
Expert
TypeScript
Expert
Node.js
Expert
Tailwind
Expert
SQL
Expert
Django
Expert
Docker
Expert
React Native
Expert
PostgreSQL
Expert
GraphQL
Expert
AWS
Expert
Stripe
Expert
Python
Expert
Kubernetes
Expert
Azure
Expert
Bootstrap
Intermediate
MongoDB
Intermediate
Jira
Intermediate
Redis
Intermediate
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Language

English
Fluent

Work Experience

Full Stack Developer at RS M Studio
November 1, 2024 - Present
Developed cross-platform mobile applications using React Native and Expo, integrating with a Django backend and Stripe payments to deliver seamless iOS and Android experiences with real-time features powered by Mapbox for location services. Built a full-stack web platform using React.js, TypeScript, Refin.dev and MUI (Material UI), connected to a Strapi headless CMS and deployed on Fly.io using Docker containers. Designed and implemented robust backend systems with Django and Docker, using PostgreSQL and optimized deployment on Fly.io for scalability, security, and maintainability. Integrated OpenAI APIs to build an intelligent AI chatbot feature for dynamic, context-aware customer support and content recommendations. Developed a content management and blogging platform using Ghost CMS integrated with React frontend and Strapi, enabling seamless content delivery and custom workflows. Implemented end-to-end CI/CD pipelines with Docker and Fly.io to automate deployments and improve devel
Senior Full Stack Engineer at Sp in nr
August 1, 2022 - July 1, 2024
Developed a modern web application and admin panel using React.js, TypeScript, and Tailwind CSS for responsive user-centric design. Used Next.js and Next.js for SSR, improving SEO performance and load times, and incorporated load balancing and data structure optimizations for telecommunications clients. Built a social media web application with React.js, Redux, and Tailwind CSS, integrating Firebase for real-time database updates. Implemented AI chatbot workflows using LLM, LangChain, Pinecone vector database and Azure OpenAI. Implemented automated testing for a web application using Jest and Enzyme for React.js components. Integrated GraphQL Apollo client in a React.js frontend for efficient data fetching. Designed and developed RESTful APIs using Django to support various client applications, ensuring robust and secure communication between services. Leveraged Agile/Scrum practices and used Git and Trello for version control and project management.
Full-Stack Developer at Onseo
June 1, 2021 - October 1, 2025
Built and maintained internal tools used by operations and support teams. Implemented backend components in Node.js and improved SQL-based workflows for reporting. Developed UI features in React and optimized component performance. Worked with engineering leads to estimate feature requirements and validate deployments for internal users. Integrated OpenAI API for messaging analysis, generating responses, and summarizing customer interactions.
Senior Full Stack Engineer at Uber
May 1, 2020 - July 1, 2022
Contributed to development of the Platform Insights application, an in-house platform that helps Uber teams discover and understand data related to datasets, internal dashboards, business metrics, and more. Used Fusion.js as the primary framework to construct a more opinionated web application. Leveraged Vue.js to build the frontend and implemented dynamic interactive components such as charts, tables, filters, and menus. Implemented Vuex for state management across the application. Designed and implemented RESTful APIs using FastAPI for seamless integration with frontend apps and third-party services. Focused on performance optimizations including lazy loading, memorization, and efficient rendering techniques to provide a responsive and smooth user experience. Conducted rigorous testing (unit, integration, end-to-end) and used tools like Jest and Enzyme for automated testing.
Frontend Engineer at Carp utty
June 1, 2018 - April 1, 2020
Architected and implemented a robust consumer dashboard and custom loan origination system using React, Next.js and Redux. Ensured scalability and maintainability using thoughtful state management and component design. Used Jest and Enzyme for comprehensive unit testing to ensure high code quality and reliability. Implemented Cypress for rigorous end-to-end testing simulating real-world user interactions. Translated design team mockups into responsive, interactive features for a seamless user experience across devices and screen sizes. Collaborated with UI/UX designers to refine and enhance the UI based on feedback and usability testing. Integrated Google Tag Manager and FullStory for comprehensive website conversion tracking and user event monitoring. Designed and implemented a robust CI/CD pipeline using Jenkins, GitHub Actions, and Travis CI to automate testing and deployments.
Automation Engineer at Tech Nova Digital Solutions
May 1, 2018 - April 1, 2021
Developed AI-powered CRM features including automated chat responses and lead-routing workflows. Built automation pipelines using n8n and Zapier to reduce manual tasks across support teams. Maintained and documented REST API endpoints supporting internal dashboards. Collaborated with design and product to plan new features and improve existing user flows.
Full-Stack Developer at Intellects of UA
February 1, 2017 - March 1, 2018
Developed backend microservices using Java (Spring Boot) and Node.js. Built data-processing jobs and optimized SQL queries for internal dashboards. Contributed to REST API documentation and code-review processes. Assisted with Docker-based deployments and basic Kubernetes operations. Worked closely with product managers to estimate tasks and deliver sprint commitments.
Frontend Developer at Safeguard Global
December 1, 2016 - June 1, 2018
Produced a data visualization dashboard for sales data using JavaScript, React.js, and Chart.js, fetching data from a JSON API and presenting it in an interactive format. Built a responsive company website using HTML5, CSS3, and Bootstrap, ensuring DOM manipulation best practices, cross-browser compatibility, and mobile responsiveness to enhance UX/UI and online branding. Developed backend servers using PHP with the Laravel framework. Constructed a user-friendly content management system (CMS) using PHP and MySQL, leveraging HTML5, CSS3, JavaScript, and jQuery for responsive design so non-technical users could easily update website content.

Education

Bachelor of Computer Science at Odessa I.I. Mechnikov National University
January 1, 2013 - January 1, 2016
Bachelor’s Degree in Computer Science at The University of Texas at Austin
April 1, 2012 - August 1, 2016

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Financial Services, Healthcare, Education, Computers & Electronics, Gaming, Professional Services
    HIPAA-Compliant MobileWoundCare App with AI Transcription&EMR Integrat

    Engineered HIPAA-compliant mobile app (iOS/Android) for wound care with AI-powered transcription and EMR integration. Transformed 2+ hour manual documentation process into 15-20 minutes using Deepgram AI. Implemented offline-first React+Capacitor with AWS backend, achieving 7x faster patient registration via AI email parsing. Built comprehensive security: AES-256 encryption, TLS 1.3, MFA, 7-year audit trails. Integrated ECW EMR with automatic route optimization. Cost-effective scaling: $750-850/month for 100 providers. Delivered complete technical architecture and phased roadmap.

    Food Delivery System

    Developed a robust food delivery platform similar to Foodpanda, using React Native (Expo) for three apps: user, rider, and vendor. Key features include real-time order tracking, secure payment integration, dynamic geolocation for deliveries, and vendor management. Ensured seamless functionality across all apps, delivering a user-friendly experience. This system significantly streamlined food delivery processes and enhanced customer satisfaction.

    AI-Powered Gmail Reply & Lead Handler

    Gmail trigger (new incoming email) → Code node parses sender, subject, body, attachments → Generate random delay (1–5 min to mimic human timing & avoid spam flags) → Lookup matching lead/contact in CRM/database (via search/record) → Filter node (skip if no match / already handled / spam) → Master AI Agent (tool-calling LLM like GPT-4o / GPT-4.1) with memory buffer → branches to tools: send_email_reply, update_CRM_record, schedule_event (Google Calendar), create/delete Zoom meeting, query_knowledge_base (RAG), get_calendar_availability → final reply sent or action logged.