About Carlos

I started in infrastructure, moved into Android, and grew into designing and engineering high-integrity products.

That path taught me to care about delivery after launch, not just the build. Across Bolivia, Peru, Chile, and the U.S., I have worked on public mobile apps, internal tools, payment workflows, and role-based platforms that teams rely on every day.

I do my best work where business processes are messy, users need clear flows, and teams want someone who can collaborate across product, engineering, and operations without losing execution speed.

LATAM + U.S. contextApps + internal toolsPayments + business systems

How I Work

I like projects where clear communication matters as much as implementation

These are the working habits I bring when a team needs someone who can build, collaborate, and keep scope practical.

How I work

I like turning ambiguous business workflows into clear product decisions and straightforward code paths.

How I work

I keep scope honest so teams can ship, learn, and improve without losing trust.

How I work

I collaborate comfortably with product, design, ops, and business stakeholders.

How I work

I treat accessibility and maintainability as part of the feature, not cleanup.

Languages: English (professional working) · Spanish (native)

Education

Bachelor's in Systems Engineering

Universidad Católica Boliviana · 2012 – 2017

Bachelor's degree in Systems Engineering from Universidad Católica Boliviana, completed between 2012 and 2017.

Technical Skills

Languages, frameworks, and tools I use

Full list of technologies across my professional experience.

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

Career Timeline

A path built through support, Android, and product delivery

The timeline below keeps the full arc, from infrastructure support through product engineering.

Some roles overlapped by design. V@COMM and Digicorp ran in parallel from Dec 2019 to 2020 with separate products, clients, and ownership boundaries.

Senior Product Engineer

Playfit

Latest Project

Remote

Personal Project

Architected a Next.js 16 (App Router) and React 19 monorepo application separating apps/web and @playfit/core.
Open-sourced the codebase (github.com/carloseav15/playfit) and structured the roadmap for native Android, iOS, and Flutter variants.
Engineered a real-time recommendation scoring engine for user game affinity and friction risk.

Product Engineer (Side Project)

MatchdayOS

Oct 2025 - Present

Remote

Personal Project

Designed and built an end-to-end soccer operations platform with 70 route-level pages (active in development).
Implemented strict role boundaries across 5 user access modes: org-admin, team-admin, referee, representative, and player.
Engineered state-driven workflows for live matchday events (roster verification, timeline, scoreboard) and post-match reporting.

Senior Product Engineer

Diaz Brothers Company LLC

Jul 2024 - Sep 2025

Bonita Springs & Naples, FL

Operational systems remain active

Designed and built a real-time operational dashboard for logistical transparency and technician/vehicle dispatch tracking.
Created an internal service order logistics system with custom pricing logic, PDF invoice generation, and automated workflows.
Eliminated manual phone coordination between field teams and administration by establishing real-time scheduling tracking.

Mobile & E-Commerce Systems Engineer

DIGICORP LTDA

Dec 2019 - Jun 2024

Bolivia / Peru / Chile

Active in Production

Main programmer for public Android & iOS applications (DigiApp), achieving 10,000+ public downloads and maintaining stability for 4+ years.
Designed and built the B2B e-commerce web platform from scratch in Vanilla JavaScript, HTML, CSS, and SQL Server.
Built backend REST APIs from scratch in PHP; engineered reverse-engineering flows on the legacy database due to a lack of documentation.

Co-Founder & Technical Advisor (Parallel Advisory Engagement)

V@COMM

Jan 2017 - Jun 2024

Bolivia

Active in Production

Developed 'Octopus' online payment and collection architecture, Android printing integration, and settlement logic as a secondary advisory role.
Designed Android point-of-sale flows with thermal printer integrations and automated settlement logic.
Built a Flutter digital wallet app with OTP verification, SMS gateways, and Firebase integrations.

Full-Stack Systems Developer

Tiempo de Cambio Operations Platform

Jun 2016 - Dec 2019

Bolivia

Active in Production

Built daily registration and reporting systems used by 100+ active users.
Implemented geospatial branch coverage tools with geofencing.
Delivered role-based websites and internal dashboards.

Junior Android Developer

TISMART (DATEC Division)

Jan 2015 - May 2016

Bolivia

Integrated REST APIs for billing and inspection tracking (CRE electric cooperative).
Implemented UI updates for banking mobile apps (BancoSol, Banco BISA) and the official Datec mobile app.
Contributed to Agile development cycles and production maintenance.

IT Support / Data Center Operations

DATEC LATAM

Aug 2014 - Dec 2014

Bolivia

Supported early-stage D-Cloud monitoring systems.
Maintained secure infrastructure workflows, monitoring tools, and followed operational protocols.
Built a foundational discipline in reliability, incident management, and production operations.