>_ Hello, I'm Horácio.

Android engineer building Kotlin products people actually use.

For more than seven years, I have shipped mobile apps professionally across fintech, retail intelligence, and product teams. These days I am also building backend systems for Markado, which gives me a full product view from client experience to operational infrastructure.

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Featured work

Projects with real-world scale.

I care about products that have to stay dependable in the real world, whether that means money movement, enterprise operations, or scheduling systems with a lot of moving parts.

Startup / Backend

Markado scheduling backend

Built the backend powering Markado's scheduling and event workflows. The platform handles appointments, guest management, invite delivery, check-in flows, payments, and Google Calendar synchronization for service businesses and event organizers.

Ktor, PostgreSQL, Exposed, Stripe, Twilio, SendGrid, Google Calendar

Visit markado.pt

Current work / Android

TrueVUE Cloud migration

Leading the migration of Sensormatic's TrueVUE Cloud app from a cross-platform foundation to Kotlin Android, with a focus on native control, maintainability, and a stronger long-term product base.

Kotlin, Android, app migration, native architecture

Learn about TrueVUE Cloud

Previous work / Fintech

M-Pesa Android apps across five markets

Worked on Android experiences for M-Pesa in Mozambique, Lesotho, Tanzania, DRC, and Ghana, contributing to mobile money products that operate at national scale and need to be dependable every day.

Android, fintech, multi-market delivery

About M-Pesa

About

Kotlin-first, product-minded, and curious about hard problems.

I'm a dedicated engineer driven by a love for Kotlin and by the challenge of turning ambitious ideas into useful products. I enjoy solving messy problems, simplifying systems, and shipping software that genuinely helps people.

What keeps me motivated is learning fast, pushing into unfamiliar territory, and bringing a fresh perspective to every team and product I work on. Android is still my main craft, but building Markado's backend pushed me to think more deeply about the whole product from client experience to operations.

What I bring

More than seven years of professional Android delivery
A practical engineering mindset shaped by real products and real users
Growing backend experience from building startup systems end to end

Contact

Let's build something useful.

If you're looking for Android expertise, Kotlin product engineering, or someone who likes owning problems end to end, send me a note.

mail@horacioco.me

Or find me around the internet.