~/horacio/portfolio

stable build

source
mobileonline
serveronline
kotlinactive
product-fitopen

$ whoami

ANDROID ENGINEER

Horácio Comé

I build Kotlin Android apps, native migration work, and backend systems for products that get messy once they meet real users. I care about reliable flows, maintainable code, and staying close enough to the product to solve the actual problem instead of the neat one.

Right now I am focused on Kotlin Android migration work for TrueVUE Cloud and Ktor and PostgreSQL backend development for Markado.

$ ls selected-work/

Selected Work

A few systems where reliability and maintainability mattered.

kumbase-platform.kt

kumbase.com
saaspostgresqlbackupssecurity-first

Built Kumbase, a security-first SaaS for automated PostgreSQL backups with encrypted artifact storage and portable restore downloads. The work centered on dependable backup flows, data safety, and a product experience teams can trust when recovery actually matters.

stack: Kotlin, PostgreSQL, backup automation, encrypted storage, restore workflows

markado-backend.kt

markado.pt
backendschedulingpaymentsintegrations

Built the backend powering scheduling, guest flows, invites, check-in, payments, and calendar sync. The job was not just APIs, it was making the whole workflow hold up under real operational use.

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

truevue-migration.md

sensormatic.com
androidmigrationnative architectureRAIN RFID

Leading migration work from a cross-platform base to Kotlin Android with an eye on maintainability, better native control, and a healthier long-term foundation for the product.

stack: Kotlin, Android, native architecture, migration strategy

mpesa-multi-market.txt

about M-Pesa
fintechandroid5M usersreliability

Worked on Android experiences for Mozambique, Lesotho, Tanzania, DRC, and Ghana, shipping for mobile money products where reliability matters every day, not just at launch.

stack: Android, fintech, multi-market delivery, reliability

$ cat quick-facts.json

At A Glance

experience7+ years
primaryKotlin Android engineer
mobileKMP, CMP, Android native, Compose, Hilt, Koin, Retrofit, Ktor
serverKMP, Ktor, PostgreSQL, Exposed, auth, integrations, background jobs

$ tail -n 4 outcomes.log

Selected Outcomes

  1. 01Built Kumbase full stack as a security-first SaaS for automated PostgreSQL backups, encrypted artifact storage, and portable restores.
  2. 02Shipped Android work for M-Pesa across five national markets serving around 5 million users.
  3. 03Leading TrueVUE Cloud migration toward Kotlin Android for a product that connects with external devices and rain RFID workflows.
  4. 04Built Markado backend flows across scheduling, payments, messaging, and calendar sync for real operational use.

$ cat notes/work-style.md

How I Work

I prefer software that survives real usage and still makes sense later. Usually that means reducing moving parts, staying close to the product problem, and choosing solutions a team can keep operating after the launch energy is gone.

horacio@portfolio : ~/workspace $

open collaboration --mode practical --focus android backend reliability

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