Looking for a job

Alfonso Frias

@alfonsofrias

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Full-stack developer who integrated a conversational AI assistant with the WhatsApp Business API at Nucleoo.

Spain

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What I'm looking for

I’m looking for junior software development opportunities, especially in backend and full-stack. I want to keep developing my judgement through hands-on work, feedback, and code reviews.

At Nucleoo, I integrated an AI assistant with the WhatsApp Business API so users could perform platform actions conversationally. I also built REST APIs, data models, webhooks, and end-to-end user flows for production web applications.

At Kienpay, I designed and built the product interface and implemented the group payment flow, including its screens, API routes, and error handling. I’m interested in applied AI and want to keep growing through hands-on backend and full-stack work, feedback, and code reviews.

Experience

Work history, roles, and key accomplishments

Full Stack Developer

Nucleoo

Feb 2026 - Aug 2026 (6 months)

Full-stack development on production web applications: frontend, backend, databases and external integrations.

- Integrated an AI assistant connected to the WhatsApp Business API, letting users perform platform actions conversationally.
- Built REST APIs, data models, validation, webhooks and complete end-to-end user flows.
- Contributed to architecture, module design and technology selection a

Frontend Developer

Kienpay

Jul 2025 - Dec 2025 (5 months)

Frontend development at an early-stage startup, working in a small team.

- Designed and built the product interface and user experience.
- Implemented the group payment flow end to end: screens, reusable components, API routes and proxies, and error handling.
- Handled state management and data persistence across invitations, payment collection and confirmation.
- Integrated Stripe Payments.
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