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Rigel Kent E. Espiritu

Full-Stack Web Developer

I build scalable web applications, AI-powered workflows, assessment platforms, and modern full-stack systems.

About

I work across the full stack to build web applications that are fast, maintainable, and practical in production. My core toolkit includes SvelteKit, Laravel, Fastify, PHP, Node.js, Tailwind CSS, MySQL, and API integrations that connect product interfaces to reliable back-end services.

Recently, my focus has expanded into AI workflow orchestration: Azure AI Agents, vector search, streaming interfaces, Redis-backed caching, and deployment patterns that make AI systems usable inside real products rather than isolated demos.

I care about clear architecture, readable interfaces, and systems that can be explained under pressure. The goal is software that feels polished to use and straightforward to maintain.

AI

Agent workflows, retrieval, and streaming UX

API

Back-end contracts, integrations, and deployment

UI

Responsive SvelteKit interfaces with Tailwind CSS

Experience

Jan 2026 - Present

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.

Involved projects

AgentixPopAI Agents APIPopAI Call CenterPopAI Telemarketing UI
SvelteKitSvelte 5TypeScriptTailwind CSS.NET 8ASP.NET CorePrismatRPCDrizzle ORMDapperPostgreSQLMySQLRedisLiveKitAzure Service Bus

Jun 2023 - Present

Full-Stack Developer / Profiles Asia Pacific, Inc.

Design, develop, and maintain scalable web applications and AI-powered systems using SvelteKit, Laravel, Yii2, Fastify, and MySQL. Contribute to platforms such as FlowAI, FlowConnect, and Assessment Center, covering assessment workflows, AI integrations, vector search, streaming responses, reporting systems, and production-ready frontend/backend architecture.

Involved projects

FlowAI / FlowConnectAssessment Center
SvelteKitLaravelYii2FastifyPHPTailwind CSSMySQLAzure AI AgentsRedis

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

Projects

Company Work

Agentix AI agent workspace preview

PopAI Technologies

Agentix

SvelteKit AI agent workspace with agent catalogs, knowledge bases, chat experiences, workspace management, OAuth integrations, observability, and admin workflows.

SvelteKitSvelte 5TypeScriptTailwind CSSPrismaPostgreSQLtRPCRedisLiveKitSentry
PopAI Agents API service architecture preview

PopAI Technologies

PopAI Agents API

Multi-tenant .NET API for registering agents, managing workspaces, configuring chat flows, running pipeline requests, handling knowledge hubs, and publishing async jobs through Azure Service Bus.

.NET 8ASP.NET CoreDapperPostgreSQLMySQLAzure Service BusAWS S3SwaggerSerilogSentry
PopAI Call Center operations preview

PopAI Technologies

PopAI Call Center

AI customer-support call-center system with customer chat, operator and supervisor flows, LiveKit voice sessions, agent tool calling, SOP workflows, escalations, CSAT, reporting, and operational readiness checks.

SvelteKitSvelte 5TypeScriptDrizzle ORMLibSQLBetter AuthLiveKitRedisOpenTelemetryTailwind CSS
PopAI Telemarketing UI dashboard preview

PopAI Technologies

PopAI Telemarketing UI

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 CSSViteLucideCampaign OpsCall Monitoring
Architecture preview for FlowAI and FlowConnect AI workflow platform

Profiles Asia Pacific, Inc.

FlowAI / FlowConnect

AI-powered professional development platform that combines SvelteKit, Laravel, Fastify, Azure AI Agents, vector search, Redis caching, and real-time SSE streaming to deliver candidate-specific behavioural insights and AI coaching workflows.

SvelteKitLaravelFastifyAzure AI AgentsVector SearchSSERedisMySQL
Assessment Center dashboard and reporting workflow preview

Profiles Asia Pacific, Inc.

Assessment Center

Yii2-based assessment and reporting platform for managing candidate assessments, scoring workflows, report generation, narrative updates, Excel imports/exports, and issue resolution for candidates and clients.

Yii2PHPMySQLPhpSpreadsheetHTMLCSSJavaScript

Personal Projects

Speech-to-text local server integration preview

Speech-to-Text Local Server

Local speech-to-text service exposed through Cloudflare Tunnel so a deployed frontend can securely connect to private transcription infrastructure without shipping heavy speech models directly to the browser.

Node.jsLocal ServicesCloudflare TunnelAPI IntegrationBrowser Mic API
E-commerce platform preview for FuzzyJARR Mart

FuzzyJARR Mart

Best capstone project: a MERN-based e-commerce platform for pet supplies with product browsing, Stripe payments, and an admin dashboard for managing products and orders.

MongoDBExpressReactNode.jsStripeBootstrap
Currency and cryptocurrency exchange rate website preview

JARR Exchange

Currency and cryptocurrency exchange-rate website using public APIs for fiat exchange rates, crypto rates, crypto news, and MetaMask wallet connectivity.

HTMLCSSJavaScriptFrankfurter APICoinPaprika APICryptoCompare APIMetaMask
Restaurant website preview for Sharkky's Kitchen

Sharkky's Kitchen

Static restaurant website showcasing menu and reservation information, built as an early frontend project with responsive layout and Bootstrap styling.

HTMLCSSBootstrap

Some live demos may be unavailable due to NDA restrictions, but architecture and implementation details can be discussed.

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.

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