Isaías Chávez
Verified Expert in Engineering
Full-stack Developer
Mexico City, Mexico
Toptal member since February 26, 2026
Isaías is a senior React Native developer with over 6 years of experience in the mobile app sector. His track record includes developing core features for major players like Aeroméxico in the airline sector and Walmart México in retail. He has also worked on large-scale fintech solutions for Spin Premia (OXXO-FEMSA) and retail projects for Bioderma. Currently, Isaías is focused on the tourism sector in Oaxaca with Eskenda, where he handles complex geographic data processing.
Portfolio
Experience
- Expo - 6 years
- Swift - 6 years
- React Native - 6 years
- App Store - 6 years
- React - 6 years
- iOS - 6 years
- Android - 6 years
- Mobile Security - 4 years
Preferred Environment
React Native, iOS, Android, App Store, Swift, React, TypeScript, MacOS, Linux, Claude Code
The most amazing...
...project I've done is Eskenda—a cultural tourism platform for Oaxaca with 500+ active users built with React Native and AI to empower local events and culture.
Work Experience
CEO | Founder
Eskenda
- Founded a mobile and web platform that connects people with events, cultural activities, and local businesses in Oaxaca. Its mission is to strengthen the community economy and promote culture through an intuitive, visual, and accessible experience.
- Built a platform using React Native for mobile and NestJS with PostgreSQL, integrating advanced geolocation, event recurrence logic, JSON Web Token authentication, and S3 storage, with smart filters, a recommendation system, and interactive maps.
- Created a cultural ecosystem with a geospatial engine (PostGIS/Mapbox) and AI-driven event scraping. It merges Oaxacan identity with high-tech mapping to bridge the community with local cultural and commercial life.
Senior Software Developer
Softtek
- Developed an ID document image recognition engine capable of processing, differentiating, and cataloging data from user images to include them in the check-in process, alongside standard maintenance tasks.
- Served as tech lead for a React Native analytics platform for Zebra TC20 devices with high performance, memory constraints, and crash resilience. Built a custom caching layer that cut API calls by 90%, improving stability and maintainability.
- Developed and implemented a passport scanner, which considerably reduced the time users spent completing the check-in flow and decreased errors in data capture.
- Supported other developers to ensure a smooth user experience, and contributed to maintaining project quality in a robust CI/CD environment, with multiple validations before each production release.
- Learned to collaborate effectively with multidisciplinary teams, adapt to a highly regulated environment, and operate within a development cycle where all work was rigorously tested, reviewed, and precisely approved before reaching end users.
React Native Developer
Icalia Labs
- Implemented the emotion matrix, which required applying advanced mathematical knowledge and working precisely with Reanimated, React Native's native API, and thread management to ensure smooth performance.
- Integrated Google Analytics for event and metric tracking, allowing the team to gain clear insights into app usage. The project was carried out with an international team, strengthening my collaboration skills in multicultural environments.
- Played a key role in the development of Oye App, a platform in the fitness and wellbeing sector. Led the creation of the application’s onboarding experience, designing and implementing a series of interactive screens and complex animations.
Full-stack Developer
Inmersys
- Developed a collection of around 15 CMS platforms for a diverse portfolio of high-profile clients, including global leaders like Walmart, Adidas, and Bioderma, leveraging React to provide premium interactive interfaces.
- Designed my first professional full-stack architectures by building robust RESTful APIs with Node.js and integrating PostgreSQL and SQLite, establishing a solid foundation for scalable deployments through Docker containerization.
- Engineered immersive 3D virtual environments using Three.js for high-profile Netflix marketing campaigns, delivering interactive web-based promotional experiences for major series launches.
- Collaborated with Nike Mexico, integrating live-stream video systems for major brand presentations into their web platforms.
Experience
Eskenda
https://eskenda.com/enRutas Oaxaca
https://rutasoaxaca.com/I built this platform as a community-led alternative to the official government app to improve public transit navigation in Oaxaca. I developed a custom routing engine that processes coordinates and location data to find the shortest bus paths for users. The project is currently active and scaling, reaching over 6,000 weekly visits.
Fotynder
https://apps.apple.com/mx/app/fotynder/id6749513362react-native-accelerometer
react-native-ambient-light-module
https://isaiaschavez.com/libraries/react-native-ambient-light-moduleEducation
Bachelor's Degree in Computer Engineering
Universidad Tecnológica de la Mixteca - Oaxaca, México
Skills
Libraries/APIs
React, Google Maps API (GeoJSON), Node.js, JSII, Fabric, REST APIs, Redux Form, Redux-Saga, Redux Persist, AndroidX, Claude API, React Testing Library, PostgREST, JavaScript Charting, Google Maps
Tools
Claude Code, Android Studio, Git, Sentry, Expo, GIS, Expo.io, JSX, GitHub, NPM, Amazon CloudFront CDN, Fastlane, Docker Hub, Docker Compose, Figma, AWS IAM, Claude, Xcode, Amazon CloudWatch, Fastly, AI Prompts, Webpack, ChatGPT, Google Analytics
Languages
TypeScript, JavaScript, CSS3, Swift, Kotlin, CSS, HTML, Java, Python
Frameworks
React Native, Android SDK, Express.js, Next.js, Redux, NestJS, Jest, tRPC, Tailwind CSS, Material UI, Bootstrap, SwiftUI
Paradigms
Mobile Development, App Development, Best Practices, Clean Architecture, Mobile App Design, Cross-platform, DevOps, Continuous Deployment, Continuous Delivery (CD), Agile, Testing, Clean Code, Scrum, Load Testing, REST, Search Engine Optimization (SEO)
Platforms
iOS, Android, New Relic, MacOS, Linux, Apple, Amazon EC2, DigitalOcean, Mobile, Firebase, Docker, Web, Mapbox, Mixpanel, Amazon Web Services (AWS)
Storage
PostgreSQL, PostGIS, Amazon S3 (AWS S3), SQLite, Databases, Amazon Aurora, Datadog
Other
Google Play Store, Gemini, Web App Testing, Deployment, AI Development, Native Mobile Apps, GeoJSON, System Design, Software Architecture, English, Business Logic, Problem Solving, Performance Optimization, Consulting, Mapping, Maps, Full-stack, Full-stack Development, AI-generated Code, Front-end, Mobile-first Design, React Native Reanimated, Mobile UI, API Integration, Cross-platform App Development, Application State Management, User Interface (UI), Mobile App Development, RESTFul APIs, iOS 17, Cross-platform Testing, Web Push Notifications, App Store Connect, Google Play Console, frameit, App Store, Mobile Security, Mentorship, Push Notifications, SEO Tools, Zustand, SOLID Principles, Supabase, English-Hindi Translation, Scalable Architecture, SaaS, Cloudflare, Power Sync, Web Mapping, Fitness, Exercise & Fitness, AI Chatbots, Images, AI-generated Assets, Mobile UX, Sensor Data, Image Recognition, Analytics, Resilience Testing, Mobile App Testing, User Interviews, Memory Management, Talend Cloud Integration, Architecture, Gemini API, AI Agents, Serverless, Leadership, OAuth, Apps, APIs, Algorithms, VPS, Business English, AI Integration, Videos, Document Recognition, Tailwind UI, CI/CD Pipelines, Mobile Apps, Pixel Perfect, Static Site Generators, Server-side Rendering (SSR), Agentic AI, Artificial Intelligence (AI), Prompt Engineering, Retrieval-augmented Generation (RAG), CSS3 Animation, Dashboards, Document Management, Mobile First, GitHub Actions, Cursor AI
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