AI Developer & Full-Stack Engineer
Based in the Philippines · Working globally
I build AI systems, CRM workflows, APIs, and web and mobile applications
that connect business needs with practical, maintainable software.
I'm a product-minded developer with experience across AI integrations, business automation, CRM platforms, real-time applications, and backend systems.
My work includes projects for Australian clients, local transport and delivery services, internet access and billing systems, point-of-sale applications, and educational tools.
I work across architecture, data modeling, interfaces, integrations, deployment, and maintenance. I focus on clear user journeys, secure access, reliable workflows, and software that teams can operate and maintain.
- AI systems and agents — LLM integrations, tool calling, streaming, structured output, and workflow-specific agent instructions.
- CRM and automation — Lead-response workflows, voice integrations, retention dashboards, and connected business tools.
- Backend and API integrations — REST APIs, webhooks, job queues, retries, idempotency, data migration, and reconciliation.
- Web and mobile products — Responsive applications, operational dashboards, and real-time experiences with React, Next.js, React Native, and Go.
- Background processing — Durable jobs and asynchronous workflows using Python, Celery, Redis, and PostgreSQL.
- Deployment and delivery — Docker-based environments, Linux VPS hosting, and Git-based deployment workflows.
| Project | Engineering focus |
|---|---|
| One Ride Balingasag | Transport, delivery, scheduled pickup, and local-store workflows using React Native, Go, PostgreSQL, and WebSockets. |
| Enterprise CRM Platform | CRM workflows, retention and revenue dashboards, Twilio browser calling, data migration, and reconciliation. Private client system. |
| Hasti | AI receptionist and lead-response workflows covering enquiry capture, qualification, routing, and follow-up. Public demo featured in my portfolio. |
| Zalio | Gym operations platform spanning CRM, member retention, campaigns, analytics, and connected business tools. |
| GymFactories | Equipment research, manufacturer discovery, gym space planning, and supplier enquiries. |
Explore the case studies and additional projects in my portfolio.
- meditrack — Healthcare tracking system.
- qado-automation — End-to-end automation tests for QADO Medisource using Playwright and TypeScript.
- smsotp — SMS OTP notification system built with React and Go.
| Area | Technologies |
|---|---|
| Frontend | TypeScript, JavaScript, React, Next.js, Tailwind CSS, TanStack Query, Zustand, shadcn/ui |
| Backend | Python, FastAPI, Django, Flask, Node.js, Express, Go, Gin, PHP, Laravel |
| Mobile | React Native, Expo, Android, Firebase |
| AI & automation | OpenAI API, Anthropic API, tool calling, streaming, structured output, MCP, n8n |
| Databases & storage | PostgreSQL, MySQL, Supabase, Redis, Firebase |
| DevOps & deployment | Docker, Linux VPS, Vercel, AWS Lambda |
| CI/CD & version control | Git, GitHub, GitLab CI, Buddy CI/CD, Jenkins |
| Integrations & testing | REST APIs, WebSockets, webhooks, Twilio Voice, GoHighLevel, Playwright |
| Background processing | Celery, durable job queues, bounded retries, idempotency, reconciliation |
| Application security | RBAC, JWT, OTP/2FA, row-level security, audit trails |
- Product architecture — Clear API contracts, modular applications, thoughtful data models, and maintainable interfaces.
- Deployment and delivery — Containerized applications, Linux VPS environments, and Git-based deployment workflows.
- Reliable integrations — Durable background jobs, bounded retries, idempotent operations, and data reconciliation.
- Application security — Role-based access, authentication, row-level authorization, and auditable workflows.
- Workflow testing — Playwright end-to-end automation and verification of important user journeys.
- Maintainability — Readable code, reusable components, documented interfaces, and clear failure-recovery paths.
I maintain practical resources for developers, students, and operators:
- awesome-internet-cafe — Software, tools, and resources for internet cafes, cybercafes, and PC bangs. Covers billing, captive portals, diskless boot, MikroTik configurations, and monitoring.
- awesome-apis-for-students — Free public APIs for student projects, capstones, and learning, with practical project ideas.
Open to AI, full-stack, and backend development opportunities, as well as mobile applications, automation, and integration projects.
- Portfolio: https://portfoliobboy.vercel.app/
- LinkedIn: https://www.linkedin.com/in/charlie-james-abejo-26362638a/
- Email: capstonee2@gmail.com
"Build the thing. Ship the thing. Help someone else build the thing."