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Rigel Kent E. Espiritu

Full-Stack Developer · AI Applications & Agents

I build production-ready full-stack applications, AI-powered workflows, and intelligent agent systems using modern web technologies and Azure AI.

About

With over three years of professional full-stack development experience, I build web applications that are fast, maintainable, and practical in production. My core toolkit includes SvelteKit, TypeScript, Node.js, Fastify, Laravel, Yii2, MySQL, PostgreSQL, and API integrations that connect product interfaces to reliable back-end services.

I also develop production AI-powered systems with Azure OpenAI and Azure AI Agents, including RAG, vector search, agent workflows, real-time streaming, Redis caching, and backend integrations that make AI useful inside complete products rather than isolated demos.

I care about clear architecture, readable interfaces, and systems that can be explained under pressure, supported in production, and straightforward to maintain. Microsoft Certified: Azure AI Apps and Agents Developer Associate.

AI

Agent workflows, retrieval, and streaming UX

API

Back-end contracts, integrations, and deployment

UI

Responsive SvelteKit interfaces with Tailwind CSS

Certifications

Microsoft

Microsoft Certified: Azure AI Apps and Agents Developer Associate

Issued August 2026 Expires August 2027

Online verifiable

View Credential

Experience

Jun 2023 - Present

Full-Stack Developer / Profiles Asia Pacific, Inc.

Design, develop, and maintain production full-stack web applications using SvelteKit, Laravel, Yii2, MySQL, and Node.js. Lead AI-powered features and backend services with Fastify, Azure OpenAI, AI agents, RAG, vector search, prompt engineering, Redis caching, and real-time SSE streaming.

SvelteKitLaravelYii2FastifyNode.jsPHPTailwind CSSMySQLAzure OpenAIMicrosoft FoundryAzure AI AgentsOpenAI APIRAGVector SearchSSERedis

Jan 2026 - Aug 2026

Full-Stack Developer / PopAI Technologies

Build and maintain AI product surfaces and service integrations across Agentix, Agents API, call-center systems, and telemarketing operations tools. Work includes SvelteKit interfaces, multi-tenant agent workflows, API integrations, LiveKit voice support, and production-facing dashboards for AI-assisted operations.

SvelteKitSvelte 5TypeScriptTailwind CSS.NET 8ASP.NET CorePrismatRPCDrizzle ORMDapperPostgreSQLMySQLRedisLiveKitAzure Service Bus

Dec 2022 - Apr 2023

Full-Stack Web Development Trainee / KodeGo Web Development Bootcamp

Built full-stack projects using frontend, backend, database, and third-party API integrations, including e-commerce, exchange-rate, and static business websites.

ReactNode.jsExpressMongoDBJavaScriptBootstrap

Featured projects

Two recent products that best represent my full-stack and AI systems work.

Some professional projects are subject to NDA and confidentiality agreements. Public descriptions focus on technologies, architecture, and my contributions without exposing proprietary information.

PopAI Technologies

PopAI Telemarketing

Operations interface for telemarketing workflows covering campaign monitoring, live call feeds, lead management, escalations, intelligence modules, playbooks, reports, voice configuration, and workspace settings.

SvelteKitSvelte 5TypeScriptTailwind CSS 4BunDrizzle ORMLibSQLBetter AuthRedisLiveKitPi Agent CoreDocker
Illustrative outbound operations dashboard with fictional labels and synthetic data

PopAI Telemarketing

Project preview

Profiles Asia Pacific, Inc.

FlowConnect

AI-powered professional development platform delivering candidate-specific behavioural insights and personalised coaching through contextual AI interactions. Built and integrated full-stack and AI services for a production platform, rather than a standalone AI demo.

SvelteKitLaravelFastifyNode.jsAzure AIAzure OpenAIAzure AI AgentsOpenAI APIRAGVector SearchSSERedisMySQL
Illustrative FlowConnect candidate insights dashboard with a floating AI chatbot

FlowConnect

Project preview

See past projects Browse all work grouped by company

Contact

Contact

Interested in collaborating, building AI-powered systems, or discussing a project?

Feel free to reach out for full-stack web development, AI workflow architecture, or production deployment work.