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Daniel Huang

@danielhuang

Senior Full-Stack Engineer at PolyAI building enterprise conversational AI workflows and integrations that reduced production failures by roughly 30%.

Finland

Message

At PolyAI, I design and deliver enterprise conversational-AI features across Python and Go services and React/TypeScript applications. I work across technical design, APIs, implementation, testing, rollout, and production support.

I built production LLM and agentic workflows using retrieval, tool execution, structured outputs, and evaluation datasets. I also developed reusable React and Next.js workflows for AI agent configuration and conversation review.

At Satispay, I built full-stack features for a European payments platform, including services for payment initiation and transaction processing. Improvements to idempotency, retries, and recovery reduced duplicate and failed processing incidents by approximately 25%.

At Sigma Software Group, I delivered full-stack applications for international clients and developed reusable React components that reduced implementation time for common workflows by roughly 20% on one client product. I work across frontend architecture, backend services, integrations, and production operations.

Experience

Work history, roles, and key accomplishments

Current

Senior Full-Stack Engineer

Current

PolyAI

Sep 2023 - Present (3 years 1 month)

Designed and delivered enterprise conversational-AI features across Python and Go backend services and React/TypeScript applications, owning technical design, API contracts, implementation, testing, rollout, and production support. Built reusable React and Next.js workflows and production LLM/agentic workflows, reducing integration-related failures by ~30% and cutting p95 latency by ~35%.

Python Go React TypeScript Next.js LLM Integrations RAG AI Agents OpenAI API Anthropic API REST APIs AWS Docker Kubernetes Terraform CI CD GitHub Actions PostgreSQL Redis Kafka Microservices Testing Observability

Software Engineer

Satispay

Apr 2020 - Sep 2023 (3 years 5 months)

Built full-stack features for a European payments platform using Java, Spring Boot, React, TypeScript, PostgreSQL, Redis, and AWS, working across transaction services and operational product workflows. Improved asynchronous payment processing with stronger idempotency and retry policies, reducing duplicate and failed processing incidents by ~25% and optimizing database queries by ~40%.

Java Spring Boot React TypeScript PostgreSQL Redis AWS Kafka REST APIs Microservices Docker CI CD Monitoring Incident Response

Full-Stack Developer

Sigma Software Group

Sep 2015 - Apr 2020 (4 years 7 months)

Delivered full-stack applications for international clients across SaaS, commerce, financial-services, and business-operations projects using JavaScript, TypeScript, React, Node.js, Java, and SQL. Built data-heavy React applications, designed REST APIs and backend services, and improved frontend maintainability by standardizing reusable components, reducing implementation time by ~20%.