Senior Product Engineer
Product engineer shipping high-integrity web and mobile applications.
I build secure transactional systems, B2B platforms, and real-time operational dashboards. U.S. work authorization: EAD (no sponsorship required).
ReactNext.jsTypeScriptKotlinAndroidSQL
Open to remote, hybrid, or on-site software engineering roles across product, platform, and transactional systems.
Android downloads
10,000+
Digicorp DigiApp public distribution
Production engineering
8+ years
Products shipped across LATAM and the U.S.
Daily users
3,000/day
Digicorp commerce usage in Bolivia
Daily operations
1,000/day
Octopus payment collections
Selected Work
Three products that show how I build
These are the clearest examples of app delivery, payment workflows, and internal systems shaped around real team needs.
Featured project
Digicorp DigiApp & Commerce
10,000+ downloads and a custom B2B web platform still active in production.
What I owned
Owned mobile app releases (Android/iOS) and engineered the core B2B commerce platform.
- Vanilla JavaScript commerce platform
- Multi-country B2B deployment
Featured project
Octopus Payments Platform
Processes ~1,000 daily utility payments across active credit unions.
What I owned
Owned payment collection architecture, native Android printing integration, and settlement logic.
- Android thermal print integration
- Automated commission & settlement logic
Featured project
Playfit Game Assistant
A local-first recommendation engine that eliminates sign-up friction and game selection fatigue.
What I owned
Architected local-first IndexedDB state, Supabase RLS policies, and serverless edge functions.
- Zero-Login onboarding with IndexedDB
- Open source codebase on GitHub
Core Skills
Technical Stack & Expertise
The tools, languages, and frameworks I use to build and support production applications.
Languages
KotlinJavaObjective-CJavaScriptTypeScriptDartSQLPHP
Frontend & Mobile
Android (Kotlin/Java)iOS (Objective-C)FlutterReact / Next.js 15/16Tailwind CSS v4HTMLCSSWordPress
Backend & APIs
REST APIsNode.jsFirebase (Auth, Firestore)Supabase (Postgres, Edge Functions)SQL ServerMySQL
Mobile Distribution
Google Play ConsoleApp Store Connect
Tools & Quality
GitCI/CD (GitHub Actions)BiomeVitestPlaywrightAgile
How I Work
I like work that connects product context and implementation detail
The strongest projects I have worked on needed someone who could build, communicate clearly, and keep decisions grounded in real usage.
Messy → clear
I translate messy workflows into software that people can actually use day to day.
Ship + iterate
I am comfortable owning both the first release and the iteration work that follows after launch.
Clear tradeoffs
I communicate clearly with product, ops, and non-technical teammates when tradeoffs need to be made.
Recommendation
What a former executive said about working with me
A short external reference from my time at Digicorp.
External reference
“Excellent professional and person: responsible, loyal, and committed.”
Samuel Soliz Adaos · CEO at Digicorp Ltda · View full recommendation · Jul 27, 2022
Relationship: senior to Carlos, not direct manager.
Hiring
Hiring? Start here
If you want the quick recruiter version, these are the details and channels I would start with.
Availability
Immediate / Full-time
Experience
8+ Years (LATAM & U.S.)
Preferred Roles
Product, Full-Stack, Mobile
Send a direct message or reach out via my standard channels below. I usually reply within 24-48 hours.
Alternative channels: