Christopher is available for hire
Hire ChristopherChristopher Pham
Verified Expert in Engineering
Mobile Engineer and Front-end Developer
Chino Hills, CA, United States
Toptal member since May 6, 2026
Bio
Christopher is an AI-native full-stack and mobile engineer who builds production AI automation, React Native apps, and TypeScript and Node.js systems. He's reduced insurance claims triage effort by 41%, architected mobile media experiences serving 1+ million users, and helped grow an iOS app from 800 to 40,000 ratings. Christopher turns vague workflows into reliable tools across AWS, React Native, Next.js, and Python.
Portfolio
Homee
TypeScript, Node.js, AWS Infrastructure, LangGraph, OpenAI API...
Turning Point Ministries
TypeScript, Expo, Fastlane, React Native, PHP, Node.js, JavaScript, React, Jest...
JPMorgan Chase
JavaScript, HubSpot, Figma, Jira, Jenkins, HubSpot Private Apps, Salesforce...
Experience
- React - 7 years
- iOS - 6 years
- TypeScript - 6 years
- React Native - 6 years
- Node.js - 5 years
- Expo - 5 years
- AWS Cloud Development Kit (CDK) - 3 years
- AI Automation - 3 years
Preferred Environment
Node.js, AI Automation, React Native, TypeScript, Python, iOS, Android, React, Amazon Web Services (AWS), Agentic AI
The most amazing...
...work I've done was building AI claims automation that cut triage effort by 41% while shipping mobile systems used by 1+ million people.
Work Experience
Senior Full-stack Engineer
2023 - 2026
Homee
- Built AI-powered claims automation workflows that process insurance claim data, apply business rules, and help route pros to insureds faster.
- Designed back-end systems that orchestrate claim intake, automation decisions, pro dispatch, and operational handoffs across production workflows.
- Architected mobile and workflow features for HOMEE's provider network, helping thousands of qualified professionals manage availability, receive matched jobs, and earn through on-demand work.
- Developed TypeScript services and AWS-based infrastructure for AI-integrated claim automation, improving reliability and reducing significant manual operational effort.
Technologies: TypeScript, Node.js, AWS Infrastructure, LangGraph, OpenAI API, Amazon Bedrock AgentCore, AWS Cloud Development Kit (CDK), AWS Lambda, AI Automation, Anthropic, Expo, React Native, JavaScript, React, GraphQL, Apollo, Jest, Detox, Amazon Web Services (AWS), MacOS, REST APIs, React Native for Web, Agentic AI, Agentic AI Systems, Full-stack, Vercel, Supabase, Leadership, Native Mobile Apps, AI Agents, APIs, Artificial Intelligence (AI), System Integration, Mobile Apps, PostgreSQL, Pgvector, Next.js, Vector Databases, Word Embedding, Full-stack Development, API Integration, Third-party APIs, Platforms, AI Integration, Claude Code, Auth, Cursor AI, MySQL, Stripe, Automations, Claude, Microsoft Graph API, SMS, Technical Leadership, AI-generated Code, Large Language Models (LLMs), Retrieval-augmented Generation (RAG), AI-assisted Development, Claude API, Security, Codex
Senior Mobile Engineer
2020 - 2026
Turning Point Ministries
- Developed React Native and full-stack features for Turning Point's digital media platform, supporting an official app with 1+ million downloads and on-demand teaching content.
- Built mobile and web experiences that helped users stream, download, and engage with radio, television, devotional, article, and premium teaching content across devices.
- Implemented push-notification workflows using Firebase Cloud Messaging (FCM), Redux, and back-end services to deliver timely ministry content and improve mobile engagement.
Technologies: TypeScript, Expo, Fastlane, React Native, PHP, Node.js, JavaScript, React, Jest, Detox, Redux, Swift, Amazon Web Services (AWS), MacOS, REST APIs, Full-stack, Leadership, Native Mobile Apps, Java, APIs, Artificial Intelligence (AI), System Integration, Mobile Apps, PostgreSQL, Full-stack Development, API Integration, Third-party APIs, AI Integration, Claude Code, Auth, Cursor AI, MySQL, Automations, Claude, SMS, Technical Leadership, AI-generated Code, Large Language Models (LLMs), AI-assisted Development, Security, Codex
Lead Front-end Developer
2023 - 2024
JPMorgan Chase
- Spearheaded the front-end delivery for Story by J.P. Morgan Chase, partnering with stakeholders and designers to ship responsive campaign experiences that supported MQL lead capture.
- Built dynamic content rendering workflows that personalized user-facing pages based on paid search ad terms and campaign context.
- Improved development efficiency and delivery speed by more than 200% through better source-code management, approval workflows, and release coordination.
- Reduced development budget costs by over 50% by streamlining front-end delivery processes, stakeholder approvals, and CMS implementation workflows.
- Designed HubSpot private app integrations that supported split-domain content management, page transfers, and campaign operations from a single portal.
- Coordinated with DevOps and networking teams to migrate digital experiences from Amazon Elastic Kubernetes Service (Amazon EKS) infrastructure to HubSpot CMS while preserving domain and content workflows.
Technologies: JavaScript, HubSpot, Figma, Jira, Jenkins, HubSpot Private Apps, Salesforce, Python, HubL, Matomo, Adobe Workfront, React, MacOS, REST APIs, Full-stack, Leadership, APIs, Artificial Intelligence (AI), System Integration, API Integration, Third-party APIs, Technical Leadership, Security
Senior Mobile Engineer
2023 - 2023
Groundswell Giving
- Guided the Corporate Grants initiative, building client-facing donation workflows that enabled companies to support tax-deductible giving to authorized charities.
- Migrated core application state from React Context to Apollo hooks, improving maintainability across consumer-facing web and mobile experiences.
- Established stronger mobile testing and release practices using Jest, Detox, CodePush, GitHub Actions, and AppCenter.
Technologies: React Native, React, GraphQL, Apollo, Go, Jest, Detox, Figma, Mixpanel, Datadog, JavaScript, MacOS, REST APIs, Full-stack, Native Mobile Apps, Java, APIs, System Integration, Mobile Apps, Full-stack Development, API Integration, Third-party APIs, Technical Leadership
Lead React Native Engineer
2021 - 2023
BallerTV
- Spearheaded the development of two React Native mobile applications supporting consumer streaming experiences and internal sports-operations workflows.
- Directed a company-wide migration from JavaScript to TypeScript, improving code quality, reducing bugs, and strengthening engineering standards.
- Built CI/CD automation with CircleCI, GitHub, Slack, and Fastlane to improve mobile release coordination across engineering and product teams.
- Supervised engineers through code reviews, architecture planning, and mobile application delivery practices.
- Contributed to API and mobile architecture serving large-scale sports streaming audiences across consumer and internal operational products.
Technologies: TypeScript, React, React Native, Ruby on Rails 5, Redux, RTK Query, Realm, Expo, JavaScript, Swift, Amazon Web Services (AWS), MacOS, REST APIs, React Native for Web, Full-stack, Leadership, Native Mobile Apps, Java, APIs, System Integration, Mobile Apps, PostgreSQL, Pgvector, Next.js, Vector Databases, Full-stack Development, API Integration, Third-party APIs, Platforms, Auth, MySQL, Stripe, Automations, SMS, Technical Leadership
Mobile Engineer
2020 - 2020
Tri Star Sports and Entertainment
- Deployed an encrypted full-stack iOS application using React Native, AWS infrastructure, and AWS Cognito authentication.
- Integrated QuickBooks APIs with custom Node.js services and database models to support client financial and banking workflows.
- Built RealmDB-based offline storage and sync workflows, improving mobile caching and local data access for iOS users.
- Implemented mobile chat functionality, including APNS notifications, socket communication, image handling, and user-friendly conversation flows.
Technologies: React Native, React, Realm, MobX, Node.js, Amazon Cognito, QuickBooks API, APNs, JavaScript, Amazon Web Services (AWS), MacOS, REST APIs, Full-stack, APIs, System Integration, Mobile Apps, Full-stack Development, API Integration, Third-party APIs, Auth, MySQL
Experience
Spixy Workspace
Spixy is a healthcare-focused coding and documentation workspace I built with a partner gastroenterologist professional to explore safer AI-assisted clinical workflows. I designed the system as a typed, audit-aware product surface with a React and Next.js workspace, Expo mobile and tablet capture flows, API-backed demo media, WebSocket protocol validation, and deterministic guardrails around AI-generated output.
My work covered the product architecture, front-end and mobile experiences, back-end service boundaries, validation schemas, traceable report-generation flows, and operator tooling for review loops. The goal was to show how AI can accelerate clinical coding support while keeping human review, structured evidence, privacy-conscious logging, and protocol safety at the center of the implementation.
My work covered the product architecture, front-end and mobile experiences, back-end service boundaries, validation schemas, traceable report-generation flows, and operator tooling for review loops. The goal was to show how AI can accelerate clinical coding support while keeping human review, structured evidence, privacy-conscious logging, and protocol safety at the center of the implementation.
TurningPoint Ministries Mobile App
https://www.davidjeremiah.org/mobile-appI worked as a Senior React Native Engineer on the Turning Point Ministries mobile app, a large-scale faith media experience for iOS and Android. I co-authored the TypeScript/React Native app, built the core media playback architecture and state management with React hooks, Redux, RTK Query, and RealmDB, and built offline storage/caching that synchronized with the phone file system.
I also worked on front-end API integration, release scripts, CodePush delivery, and App Store and Play Store release workflows. A key contribution was shipping native review and engagement flows that helped grow iOS ratings from roughly 800 to 40,000 at 4.9 stars, with Android reaching 4.9 stars and roughly 9,200 Google Play reviews.
I also worked on front-end API integration, release scripts, CodePush delivery, and App Store and Play Store release workflows. A key contribution was shipping native review and engagement flows that helped grow iOS ratings from roughly 800 to 40,000 at 4.9 stars, with Android reaching 4.9 stars and roughly 9,200 Google Play reviews.
BallerTV Mobile Apps
https://www.ballertv.com/I served as Lead React Native Engineer for BallerTV, a nationwide youth-sports streaming platform with consumer and internal mobile apps. I built and refactored three core React Native applications, led a company-wide JavaScript-to-TypeScript migration, and improved mobile architecture, developer experience, and release reliability.
My work included React Native, TypeScript, Redux/RTK Query, RealmDB, Ruby/Rails integrations, Fastlane, CircleCI, Appium, Instabug, Xcode, Android Studio, and Figma collaboration. I also created deployment automation integrated with GitHub and Slack, supported game-event operational workflows, and optimized internal tooling for coordinating contractors and streaming operations across events.
My work included React Native, TypeScript, Redux/RTK Query, RealmDB, Ruby/Rails integrations, Fastlane, CircleCI, Appium, Instabug, Xcode, Android Studio, and Figma collaboration. I also created deployment automation integrated with GitHub and Slack, supported game-event operational workflows, and optimized internal tooling for coordinating contractors and streaming operations across events.
Groundswell Giving Corporate Philanthropy Platform
https://www.groundswell.io/I worked as a Senior Front-end Software Engineer on Groundswell, a mobile-first corporate philanthropy platform that helps companies run giving, matching, grants, volunteering, and employee assistance programs. I contributed across React Native, React, TypeScript, GraphQL, Apollo, Go APIs, Jest, Detox, GitHub Actions, Datadog RUM, Mixpanel, AppCenter, and CodePush. I helped establish UI and end-to-end testing practices, migrated core libraries toward the newer React Native architecture to enable Detox coverage, moved state management from React Context to Apollo hooks, and led mobile release improvements with trunk-based feature PRs, automated changelogs, and CodePush delivery.
HOMEE Pro Mobile App and Claims Automation
https://www.homee.com/prosI work as a Senior Software Engineer on HOMEE Pro and related HOMEE insurance-claims automation systems. HOMEE Pro is a mobile platform for service professionals handling property repair jobs, documentation, availability, routing, and job-site workflows. My work spans React Native, TypeScript, React, Node.js, AWS, Python, Next.js, tRPC, Vercel AI SDK, LangGraph, Fastlane, Bitrise, and Kysely. I implemented mobile CI/CD, native privacy/security features, and production deployment improvements, and architected AI-driven automation for claims triage and deterministic routing. One major outcome was reducing insurance claims triage effort by 41% while improving operational speed and consistency.
Certifications
AUGUST 2019 - PRESENT
Hack Reactor JavaScript Immersive Course
Hack Reactor
Skills
Libraries/APIs
Node.js, OpenAI API, React, REST APIs, Claude API, Zod, Auth, Stripe, MobX, QuickBooks API, React DnD, React Native for Web
Tools
Expo, AWS Cloud Development Kit (CDK), RTK Query, Claude Code, Claude, Codex, Fastlane, Jira, Figma, Jenkins, Matomo, Amazon Cognito, Xcode, Android Studio, CircleCI
Languages
TypeScript, JavaScript, Python, GraphQL, PHP, HubL, Go, C++, Java, CSS, Swift
Frameworks
React Native, Jest, Detox, Redux, Next.js, Ruby on Rails 5, LangGraph, Appium
Platforms
iOS, Android, AWS Lambda, AWS IoT, MacOS, Amazon Web Services (AWS), Vercel, HubSpot, Salesforce, Mixpanel
Storage
MySQL, Datadog, Realm, PostgreSQL
Other
Anthropic, AI Automation, AWS Infrastructure, Full-stack Development, Agentic AI, Full-stack, Native Mobile Apps, AI Agents, APIs, Artificial Intelligence (AI), System Integration, Mobile Apps, API Integration, Third-party APIs, Platforms, AI Integration, Cursor AI, Automations, Technical Leadership, AI-generated Code, Large Language Models (LLMs), Retrieval-augmented Generation (RAG), AI-assisted Development, Supabase, Leadership, Pgvector, Vector Databases, Word Embedding, HIPAA, Microsoft Graph API, SMS, Security, Amazon Bedrock AgentCore, HubSpot Private Apps, Adobe Workfront, Apollo, APNs, Data Structures, Software Development Lifecycle (SDLC), WebSockets, CodePush, GitHub Actions, Agentic AI Systems
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