Customer-Facing Solutions Engineer
SaaS, Cloud, AI, and Technical Implementations

Hello, my name is
Chuck Hyun Choi

Customer-facing Solutions Engineer with 8+ years of experience translating complex requirements into scalable SaaS, cloud, and AI-powered solutions.

hyunchoi94@gmail.com949-233-0175
Tustin, CA
Developer Image

Projects

AI-enabled and operational applications that demonstrate my approach to solution design, APIs, and scalable implementation.

Multi-tenant SaaS AI knowledge base

Beacon

Live demo

Beacon helps teams upload company documents, manage workspace access, and ask natural-language questions that return grounded answers with citations from only the documents each user is authorized to access.

Beacon demo screenshot
  • Tenant, role, and department-aware authorization
  • Private document upload, parsing, chunking, and search
  • AI answers with citations from authorized context only
  • Supabase Postgres, Storage, RLS, and pgvector
Next.jsReactTypeScriptSupabaseOpenAI
Open Demo
Offline-first ordering workflow

CourtCraft Orders

Live demo

CourtCraft Orders gives tennis goods reps a tablet-friendly workflow for refreshing demo master data, creating location-specific orders, capturing buyer signatures, saving completed orders locally, and syncing queued orders when connectivity returns.

CourtCraft Orders demo screenshot
  • Customer, store, item, and location assignment refresh flow
  • Location-aware catalog filtering, cart review, and checkout
  • Buyer signature capture with saved checkout history previews
  • Offline local storage with queued sync retry when online
ExpoReact NativeTypeScriptZustandSQLite
Open Demo

Professional Work

Selected SaaS, cloud, AI, and data solutions from my work at Pulmuone and HubSpot, grounded in measurable customer and business outcomes.

cloud workflow system

Pulmuone NPD Workflow Transformation

Designed and implemented a cloud-based new product development workflow, replacing email- and Word-based processes across cross-functional teams.

  • Reduced planning timelines from 4 weeks to 1.5 weeks
  • Cross-functional discovery and solution design
  • Centralized workflow and structured business data
azure ai

AI-Powered Document Translation

Built a document translation platform using Azure Translator APIs while preserving the formatting of the original business documents.

  • Reduced turnaround time by over 80%
  • Cut translation time from 1 hour to under 10 minutes
  • API integration with formatting preservation
automation & reporting

Business Systems Automation & Reporting

Automated 10+ recurring BI reports to replace manual processes and provide teams with real-time operational insights.

  • Power BI dashboards and data modeling
  • SQL-backed reporting workflows
  • Power Automate process automation
enterprise saas

HubSpot Workflow Automation

Developed customer-facing Undo/Redo and hierarchical folder management features for HubSpot’s workflow automation platform.

  • Reliable state recovery for complex workflows
  • Organization for thousands of automation assets
  • TypeScript migration reduced runtime errors by 20%

About me

Experience

Pulmuone Foods USA, Inc.
Solutions Engineer / BI Developer
Designed 5+ cloud-based business applications, including an Azure AI translation platform that cut turnaround time by over 80% and an NPD workflow system that reduced planning timelines from four weeks to 1.5 weeks.
02/2024 - Present
HubSpot
Software Engineer — Automation Team
Built customer-facing Undo/Redo and folder management features for HubSpot’s workflow automation platform. Helped lead a JavaScript-to-TypeScript migration that reduced production runtime errors by 20%.
10/2021 - 02/2023
HubSpot
Technical Consultant — Professional Services
Led 20+ complex HubSpot CMS migrations and completed 70+ technical qualification reviews while maintaining 85%+ customer satisfaction.
10/2020 - 10/2021
HubSpot
Technical Support Specialist
Resolved 8,000+ complex customer issues across HTTP(S), DNS, SSL, REST APIs, and authentication while maintaining 90%+ NPS. Trained 45+ support engineers across four cohorts.
08/2018 - 10/2020

Skills

Solution Engineering

  • Technical Discovery
  • Proof of Concept (POC)
  • Solution Design
  • Technical Implementations
  • Customer Enablement

Data, Cloud & AI

  • REST APIs
  • OpenAI API
  • Azure AI Services
  • SQL
  • Python
  • Power BI
  • Power Automate
  • AI Development (Codex, Claude)

Web & Infrastructure

  • HTTP(S)
  • DNS
  • SSL/TLS
  • Authentication
  • Enterprise SaaS
  • React
  • TypeScript
  • JavaScript

Education

General Assembly
Software Engineering Immersive
2020
Cal Poly Pomona University
B.S. in Hospitality Management
2016