Jose is available for hire
Hire JoseJose Quintero
Verified Expert in Engineering
Software Engineer and Developer
Guatemala, Guatemala
Toptal member since September 15, 2026
Bio
Jose is a senior software engineer specializing in iOS and mobile development, with experience building products for companies including Airtable, PayPal, Disney, and Getaround. He combines hands-on engineering and technical leadership, focusing on scalable architecture, polished user experiences, and reliable production software. Jose developed Airtable's iOS app, enhancing mobile workflows with Swift and SwiftUI, and ensuring seamless integration with the web platform.
Portfolio
Airtable
iOS, Swift, Product Engineering, Architecture, App Store, Apps, Mobile Apps...
Getaround
Swift, Objective-C, GraphQL, Architecture, App Store, Apps, Mobile Apps...
Hugo
Swift, Objective-C, GraphQL, Architecture, App Store, Apps, Mobile Apps...
Experience
- Swift - 12 years
- UIKit - 12 years
- iOS - 12 years
- TypeScript - 10 years
- JavaScript - 9 years
- SwiftUI - 8 years
- React Native - 6 years
- React - 6 years
Work Experience
Senior Software Engineer
2024 - PRESENT
Airtable
- Developed and maintained Airtable’s iOS product, delivering native mobile experiences for a collaborative, data-driven platform.
- Partnered with product, design, and engineering teams to translate complex product requirements into scalable, maintainable iOS features.
- Contributed to mobile architecture, code quality, debugging, performance, and the evolution of Airtable’s iOS user experience.
Technologies: iOS, Swift, Product Engineering, Architecture, App Store, Apps, Mobile Apps, Mobile App Development, TypeScript, TestFlight, Web Development, Agentic Coding, A/B Testing, Front-end, AI Agents, API Integration, APIs, Large Language Models (LLMs), OpenAI SDK, Server-side Rendering (SSR), AI Integration, Artificial Intelligence (AI), Claude, Airtable, Claude Agent SDK, Workflow Automation, Workflow Automation & System Integration, AI Chatbots, Chatbots, Data Engineering, Full-stack Development, Machine Learning, Claude Code, AI Architecture, AI Engineering, Web Security, IT Security, Application Security, Progressive Web Applications (PWAs), Data Privacy, Software as a Service (SaaS), Communication, User Interface (UI), REST APIs, feature flags, Third-party APIs, Native Mobile Apps, Mobile, AI-assisted Development, Front-end Development, AI Development, Location Services, Security, Design Systems, App Store Acceptance Process, Dependency Injection, Concurrency, Model View ViewModel (MVVM), Modularization, Observability, Charting, Combine
Senior Engineer
2022 - 2024
Getaround
- Developed and maintained production iOS features behind feature flags in close partnership with product and back-end teams.
- Improved application usability, dependability, and performance while addressing crashes, memory issues, and production defects.
- Built and integrated internal tooling and APIs. Collaborated with design to deliver new product experiences.
- Contributed to code quality through testing, debugging, reviews, and scalable architecture decisions.
Technologies: Swift, Objective-C, GraphQL, Architecture, App Store, Apps, Mobile Apps, Mobile App Development, TestFlight, A/B Testing, API Integration, APIs, Web Security, IT Security, Application Security, Data Privacy, Communication, User Interface (UI), Jira, REST APIs, feature flags, Third-party APIs, Native Mobile Apps, Mobile, Google Maps API, Minimum Viable Product (MVP), Location Services, Location Tracking, Bluetooth, Security, Design Systems, App Store Acceptance Process, Dependency Injection, Concurrency, Model View ViewModel (MVVM), Modularization, Observability, Charting, Combine
Head of iOS
2021 - 2022
Hugo
- Led iOS engineering and delivery for a production consumer application, balancing product velocity, quality, and budget constraints.
- Designed scalable, high-performance application architecture and implemented high-quality product experiences.
- Coordinated with UI/UX, product managers, and back-end engineers to deliver cohesive end-to-end features.
- Mentored junior developers and established engineering practices that improved maintainability and team effectiveness.
Technologies: Swift, Objective-C, GraphQL, Architecture, App Store, Apps, Mobile Apps, Mobile App Development, TypeScript, TestFlight, Web Development, Expo, A/B Testing, CSS, Front-end, API Integration, APIs, Server-side Rendering (SSR), SEO Tools, Search Engine Optimization (SEO), eCommerce, Chatbots, Data Engineering, Full-stack Development, Machine Learning, API Design, Cloudflare, Cloudflare Durable Objects, Web Application Architecture, Payment APIs, Web Security, IT Security, Application Security, Logistics, Shipping, Data Privacy, Technical Leadership, Communication, User Interface (UI), Jira, REST APIs, feature flags, Third-party APIs, Native Mobile Apps, Mobile, Google Maps API, Minimum Viable Product (MVP), Location Services, Location Tracking, Bluetooth, Marketplaces, Security, Design Systems, App Store Acceptance Process, Dependency Injection, Concurrency, Model View ViewModel (MVVM), Modularization, Observability, Charting
Senior Software Engineer
2020 - 2021
PayPal
- Developed features and resolved production issues in the PayPal iOS application.
- Integrated new signature capabilities with PDF rendering and data-management APIs using GraphQL and REST.
- Contributed to development using Swift and Objective-C and collaborated across mobile and web technologies.
Technologies: Swift, Objective-C, GraphQL, Architecture, App Store, Apps, Mobile Apps, Mobile App Development, TestFlight, Web Development, A/B Testing, CSS, API Integration, APIs, Payment APIs, Web Security, IT Security, Application Security, Data Privacy, Communication, User Interface (UI), Jira, REST APIs, feature flags, Third-party APIs, Native Mobile Apps, Mobile, Minimum Viable Product (MVP), Location Services, Security, Design Systems, App Store Acceptance Process, Dependency Injection, Concurrency, Model View ViewModel (MVVM), Modularization, Observability, Charting
Full-stack Developer
2020 - 2020
Accointing
- Built web and mobile experiences for a cryptocurrency portfolio and tax-management product.
- Implemented REST endpoints, authentication, notifications, and product functionality using React, React Native, Node.js, JavaScript, and TypeScript.
- Collaborated with a 15-person engineering team and worked across blockchain-related technologies.
Technologies: Swift, React Native, Node.js, Next.js, GraphQL, HTML5, App Store, Apps, Mobile Apps, Mobile App Development, App Design, TypeScript, TestFlight, Web Development, Stripe Connect API, Expo, NestJS, Tailwind CSS, A/B Testing, CSS, Front-end, API Integration, APIs, Server-side Rendering (SSR), Core Web Vitals, SEO Tools, Search Engine Optimization (SEO), Full-stack Development, Python, API Design, Web Application Architecture, Payment APIs, Web Security, IT Security, Application Security, PostgreSQL, Prisma, Progressive Web Applications (PWAs), Data Privacy, Software as a Service (SaaS), Communication, User Interface (UI), Jira, Full-stack, Web Applications, Kotlin, REST APIs, feature flags, Responsive Web Apps, Third-party APIs, Native Mobile Apps, Mobile, Google Play Store, Minimum Viable Product (MVP), Front-end Development, HTML, Location Services, Bluetooth, Security, Design Systems, CSS3, Concurrency, Modularization, Charting
Senior iOS Developer – Star Wars
2019 - 2020
The Walt Disney Company
- Built iOS experiences for the Star Wars application, including QR-scanning and augmented reality features.
- Implemented a platform for StarWars.com and delivered features across the application stack.
- Worked with RESTful APIs and GraphQL in a large consumer product environment.
Technologies: Swift, Objective-C, GraphQL, App Store, Apps, Mobile Apps, Mobile App Development, TestFlight, A/B Testing, API Integration, APIs, Web Security, IT Security, Application Security, Communication, User Interface (UI), Jira, REST APIs, feature flags, Third-party APIs, Native Mobile Apps, Mobile, Streaming, Location Services, Security, Design Systems, App Store Acceptance Process, Dependency Injection, Concurrency, Modularization
Full-stack Developer – Climate
2019 - 2020
Mango Chango
- Built a weather and climate platform using React, Node.js, iOS technologies, GraphQL, and data-driven recommendations.
- Tracked and fixed bugs in React, Node.js, and other technologies that were crucial to the product's success.
- Architected the software design as part of a team, as well as later on implemented such design on the codebase.
Technologies: React, Node.js, iOS, GraphQL, HTML5, TypeScript, Web Development, Expo, NestJS, Tailwind CSS, A/B Testing, CSS, Front-end, Next.js, API Integration, APIs, Server-side Rendering (SSR), Core Web Vitals, SEO Tools, Search Engine Optimization (SEO), Full-stack Development, Python, API Design, Web Application Architecture, Payment APIs, Web Security, IT Security, Application Security, PostgreSQL, Prisma, Progressive Web Applications (PWAs), Software as a Service (SaaS), Communication, User Interface (UI), Jira, Full-stack, Web Applications, REST APIs, feature flags, Responsive Web Apps, Third-party APIs, Front-end Development, HTML, Location Services, Security, Design Systems, CSS3, Concurrency
Mobile Developer – BI en Línea
2018 - 2019
Milk and Cookies
- Built and improved mobile banking experiences, including account access, transaction history, and software architecture.
- Designed and implemented the architecture for the iOS app.
- Modularized the application for easy developer experience on large or specialized teams, which also allows for low-risk updates.
Technologies: iOS, Mobile Banking, Architecture, App Store, Apps, Mobile Apps, Mobile App Development, App Design, TestFlight, A/B Testing, API Integration, APIs, API Design, Web Security, IT Security, Application Security, Data Privacy, Communication, User Interface (UI), Jira, Kotlin, REST APIs, feature flags, Third-party APIs, Native Mobile Apps, Mobile, Location Services, Security, Design Systems, Dependency Injection, Concurrency, Model View ViewModel (MVVM), Modularization
Mobile Developer – Fox Sports App
2017 - 2019
Fox Networks
- Improved app stability and performance, built iOS features and services, and worked on Android/iOS development, testing, and app-store delivery.
- Implemented video playback experiences for live and VOD.
- Implemented in-app purchases and refined winback experiences.
Technologies: iOS, Android, Mobile Development, Testing, App Store, Apps, Mobile Apps, Mobile App Development, App Design, TestFlight, A/B Testing, API Integration, APIs, API Design, Web Security, IT Security, Application Security, Communication, User Interface (UI), Jira, REST APIs, feature flags, Third-party APIs, Native Mobile Apps, Mobile, Front-end Development, Streaming, Security, Design Systems, Concurrency, Model View ViewModel (MVVM), Modularization
Mobile Developer – Visa VPT
2017 - 2018
Milk and Cookies
- Improved UX, performance, stability, and crash handling for a wallet/payment application.
- Tracked and fixed bugs using Jira as a tracking and management tool.
- Oversaw the launch and tracked user feedback to improve the platform and application.
Technologies: iOS, User Experience (UX), Performance, HTML5, App Store, Apps, Mobile Apps, Mobile App Development, App Design, TypeScript, TestFlight, Web Development, CSS, API Integration, APIs, Full-stack Development, API Design, Web Security, IT Security, Application Security, Data Privacy, Communication, User Interface (UI), Jira, Full-stack, Kotlin, REST APIs, feature flags, Third-party APIs, Native Mobile Apps, Mobile, Google Play Store, Minimum Viable Product (MVP), Front-end Development, Location Services, Security, Design Systems, CSS3
Mobile Developer – Coca-Cola
2017 - 2017
Milk and Cookies
- Built a store-owner rewards application with barcode scanning, testing, web integration, and iOS/Android delivery.
- Worked in an Agile environment with multiple people and in-field investigation.
- Oversaw launch and production usage, fixing bugs along the way.
Technologies: iOS, Android, Testing, App Store, Apps, Mobile Apps, Mobile App Development, App Design, TypeScript, TestFlight, Web Development, CSS, API Integration, APIs, Full-stack Development, API Design, Web Security, IT Security, Application Security, Communication, User Interface (UI), Jira, Full-stack, Kotlin, REST APIs, Third-party APIs, Native Mobile Apps, Mobile, Minimum Viable Product (MVP), Front-end Development, Location Services, Security, Design Systems, CSS3
Mobile Developer – Verto
2016 - 2016
Milk and Cookies
- Built a nonprofit mobile application that generated advertising revenue and directed proceeds to selected organizations.
- Worked closely with organizations to better communicate information about them.
- Oversaw releases and bug fixing triage throughout the lifetime of the app.
Technologies: iOS, Mobile Development, HTML5, App Store, Apps, Mobile Apps, Mobile App Development, App Design, TestFlight, API Integration, APIs, Web Security, IT Security, Application Security, Communication, User Interface (UI), Jira, REST APIs, Third-party APIs, Native Mobile Apps, Mobile, Minimum Viable Product (MVP), Front-end Development, Security, Design Systems
Mobile Developer – Hugo
2016 - 2016
Milk and Cookies
- Developed a medication-adherence application using iOS, Android, PHP, HTML/CSS, Sketch, Swift, and Objective-C.
- Tracked and fixed issues using Jira as a tracking tool.
- Oversaw releases and issue triage and led product and QA meetings.
Technologies: iOS, Android, Swift, Objective-C, PHP, HTML5, App Store, Apps, Mobile Apps, Mobile App Development, App Design, TypeScript, TestFlight, Web Development, CSS, API Integration, APIs, API Design, Web Security, IT Security, Application Security, Communication, User Interface (UI), Jira, REST APIs, Third-party APIs, Native Mobile Apps, Mobile, Front-end Development, HIPAA Compliance, Security, Design Systems, CSS3
Mobile Developer – Dominos Pizza
2015 - 2016
Milk and Cookies
- Improved the conversion and ordering UX, added order tracking and new product flows, and delivered iOS features in Swift and Objective-C.
- Improved the design software pipeline to improve delivery times and releases.
- Oversaw releases and ASO to improve user adoption.
Technologies: iOS, Swift, Objective-C, App Store, Apps, Mobile Apps, Mobile App Development, App Design, TestFlight, API Integration, APIs, API Design, Web Security, IT Security, Application Security, Communication, User Interface (UI), Jira, REST APIs, Third-party APIs, Native Mobile Apps, Mobile, Minimum Viable Product (MVP), Front-end Development, Security, Design Systems, CSS3
iOS Developer
2014 - 2015
Milk and Cookies
- Worked across multiple client projects as an iOS developer, building and maintaining native applications before the Domino's engagement.
- Tracked and fixed bugs using Jira as a tracking tool.
- Improved design-software relations by introducing an optimized pipeline for deliverables.
Technologies: iOS, App Store, Apps, Mobile Apps, Mobile App Development, App Design, TestFlight, Web Development, CSS, API Integration, APIs, Web Application Architecture, Web Security, IT Security, Application Security, Communication, User Interface (UI), Jira, REST APIs, Third-party APIs, Native Mobile Apps, Mobile, Front-end Development, Security, Design Systems
Project History
Airtable for iOS
https://www.airtable.comI worked on Airtable’s native iOS application, bringing powerful workflows from the web platform to a polished mobile experience. My work included developing and evolving complex interface features using Swift and SwiftUI, including Kanban-style workflows with stack-based organization, drag-and-drop interactions, search, record details, and real-time data updates. I collaborated closely with product, design, and back-end engineers to maintain behavioral consistency between web and mobile while adapting interactions for iOS. I also contributed to architecture, feature rollouts, debugging, code reviews, and the application's long-term maintainability.
PayPal Mobile Experiences
https://www.paypal.comAs a senior software engineer at PayPal, I contributed to production features and digital experiences within PayPal’s ecosystem. My work included developing user-facing functionality, integrating back-end services via REST and GraphQL APIs, and implementing document-related experiences, including PDF generation and digital signatures. I collaborated with product, design, back-end, and engineering teams throughout development, testing, and release, with a strong focus on code quality, maintainability, and reliability. Working within a large-scale financial technology platform also required careful attention to established engineering standards and robust production-ready implementations.
Getaround iOS App
https://www.getaround.comI worked as a software engineer on Getaround’s production iOS application, a large-scale car-sharing marketplace for discovering, booking, and accessing vehicles. I developed and maintained customer-facing features while contributing to the application's architecture and reliability. My work included Swift development, API integrations, feature-flagged releases, automated testing, performance improvements, and debugging complex crashes and memory-related issues. I collaborated with product, design, back-end, and mobile engineers through implementation, code review, testing, and production rollout, helping deliver reliable features within a mature consumer application.
Website for Sports Insurance Company
http://www.playershealth.comI developed the company’s WordPress website, building a responsive digital presence that communicates its insurance products, athlete safety solutions, and resources to sports organizations. The implementation focused on creating a flexible content-driven experience that could support marketing initiatives and ongoing updates through WordPress.
Website for Biotech Client
http://www.concarlo.comI developed a responsive WordPress website that translates complex scientific and biotechnology content into a clear and accessible digital experience. The site presents Concarlo’s research, technology, leadership, partnerships, publications, and company updates through a flexible content structure that allows the team to manage and update information through WordPress.
Marketing Website for a Hedge Fund Portfolio Intelligence Platform
http://www.arcana.ioI developed the public-facing marketing website for a portfolio intelligence platform serving hedge funds and asset managers. I was responsible for implementing the landing experience and translating the product and brand direction into a responsive website.
Platform for Property Insurance Claims and Repairs
http://www.westhill.comI contributed to the front end and back end of a web platform that digitizes the property insurance repair process. The platform connects homeowners, insurance carriers, and contractors, allowing users to select contractors, coordinate repairs, and track restoration projects from initial claim through completion. I contributed across the web stack, implementing and maintaining user-facing experiences as well as the back-end functionality supporting the platform and its workflows.
Website for a Digital Healthcare Platform
http://www.empass.comI developed the public-facing website and content management system for a digital healthcare platform connecting patients with healthcare services. I implemented the site using WordPress, building a responsive experience for presenting the company’s services and solutions while providing a flexible CMS that allowed the team to manage and update content independently. My work focused on the marketing website and its supporting content infrastructure rather than the underlying healthcare platform.
Website for Tech Founders and Investors
http://www.joincolectivo.comI developed the public-facing website for Colectivo, a technology community connecting founders, investors, and operators across the U.S. and Latin America. I built the landing experience using SvelteKit and integrated third-party services to support the site’s community and business workflows. My work focused on delivering a responsive, performant front end while connecting the website with the external tools required to support Colectivo’s growing community.
AI-powered CV Generation Platform for McDonald’s
http://www.cvdevida.comI developed the full-stack web application for CV de Vida, an interactive career platform created for McDonald’s that helps users identify professional skills from their everyday experiences and turn them into content for their CV. I built both the front end and back end using SvelteKit, with Supabase providing the application’s data infrastructure. My work covered the complete user experience and application workflows, including the integration of AI-powered functionality used to generate personalized CV content from user input.
Website for a Creative Agency
http://www.alt-black.nycI developed the complete website for Alt-Black, a New York-based creative agency, using a headless WordPress architecture with SvelteKit. I was responsible for the full implementation, using WordPress as the content management system and building the front end in SvelteKit. This approach gave the team the flexibility to manage content through WordPress while delivering a modern, responsive, and performant web experience through a decoupled front end.
Education
2014 - 2018
Bachelor's Degree in Computer Science
Universidad Francisco Marroquin - Guatemala
Skills
Libraries/APIs
Node.js, React, REST APIs, Stripe Connect API, Google Maps API
Tools
TestFlight, Jira, Git, Expo, Claude, Claude Agent SDK, Claude Code, Google Analytics, Prisma
Languages
Swift, JavaScript, TypeScript, CSS, HTML, CSS3, HTML5, Kotlin, Objective-C, GraphQL, PHP, SQL, Python
Frameworks
React Native, Next.js, UIKit, SwiftUI, Tailwind CSS, Svelte, NestJS, Combine
Paradigms
Mobile Development, Responsive Web Design (RWD), Model View ViewModel (MVVM), Modularization, Model Context Protocol (MCP), Search Engine Optimization (SEO), Web Application Architecture, HIPAA Compliance, Dependency Injection, Testing, Unit Testing
Platforms
iOS, Mobile, Webflow, Android, WordPress
Storage
PostgreSQL
Other
feature flags, App Store, Apps, Mobile Apps, Mobile App Development, Web Development, A/B Testing, Front-end, API Integration, APIs, Server-side Rendering (SSR), Airtable, Full-stack Development, Communication, User Interface (UI), SvelteKit, CMS, Responsive Web Apps, Third-party APIs, Native Mobile Apps, Minimum Viable Product (MVP), Front-end Development, Streaming, Location Services, Location Tracking, Bluetooth, Design Systems, App Store Acceptance Process, Design, Architecture, User Experience (UX), App Design, Agentic Coding, AI Agents, OpenAI SDK, AI Integration, Artificial Intelligence (AI), Workflow Automation, Workflow Automation & System Integration, Core Web Vitals, SEO Tools, eCommerce, AI Chatbots, Chatbots, API Design, Payment APIs, Web Security, IT Security, Application Security, Progressive Web Applications (PWAs), Data Privacy, Software as a Service (SaaS), Technical Leadership, Full-stack, Web Applications, Supabase, AI-assisted Development, AI Development, Marketplaces, Security, Dashboards, Data Visualization, Real-time Data, Concurrency, Observability, Charting, Product Engineering, Mobile Banking, Performance, real-time updates, CI/CD Pipelines, Debugging, Accessibility, Optimization, Software, Large Language Models (LLMs), Data Engineering, Machine Learning, Cloudflare, Cloudflare Durable Objects, AI Architecture, AI Engineering, Logistics, Shipping, Squarespace, Google Play Store, Vite, Macros
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