Open to opportunities

agustin koll

@agustinkoll

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Senior Flutter and Android developer delivering scalable mobile apps and leading engineering efforts.

Argentina

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What I'm looking for

I seek senior mobile roles where I can lead technical work, mentor teams, build cross-platform products with clean architecture, and deliver high-quality releases.

I am a Senior Mobile Engineer specializing in Flutter and Android (Kotlin/Java) with over eight years building scalable, high-performance applications across mobile, TV and desktop platforms. I lead small teams, mentor developers, design clean architectures, and drive end-to-end feature delivery while improving stability and performance.

My notable work spans fitness streaming, healthcare, finance, and IoT projects where I implemented modular architectures, optimized performance, increased test coverage, and handled deployments to Google Play, App Store and Microsoft Store. I collaborate closely with designers and product managers to deliver user-focused solutions and onboard teams to new technologies.

Experience

Work history, roles, and key accomplishments

Current

Lead Developer

Current

Mapple

Led development of a nutritionist platform with patient logging and professional analysis, delivering desktop and mobile apps available on App Store, Google Play and Microsoft Store.

Flutter Mobile Apps Analytics App Store Deployment Microsoft Store

Senior Flutter Developer

Rootstrap

Jan 2021 - Oct 2025 (4 years 9 months)

Led development of a new Flutter app replacing a legacy water-testing system, implemented clean modular architecture and performance optimizations, and mentored developers during Flutter onboarding.

Flutter Dart Performance Optimization Mentoring Modular Architectures REST APIs Firebase

React Native Developer

DinkSmart

Apr 2025 - Jun 2025 (2 months)

Fixed bugs and implemented UI features for a paddle tennis match-organizing React Native app, improving layout consistency and cross-platform visual performance.

React Native JavaScript REST APIs Performance Tuning

Senior Flutter Developer

Genemedics

Mar 2025 - Mar 2025 (0 months)

Collaborated with designers and PMs to deliver healthcare features, fixed multiple bugs and implemented UI improvements for patient progress and supplement tracking.

Flutter Dart UI REST APIs Firebase

Senior Flutter Developer

R&G Brenner Tax Apps

Jan 2025 - Feb 2025 (1 month)

Enhanced stability and performance across mobile and web Flutter tax apps and unified onboarding flows for three related applications.

Flutter Dart Performance Optimization Onboarding Firebase

Senior Android Developer

SprintFWD

Jan 2023 - Jan 2025 (2 years)

Developed and maintained Xponential+ fitness apps for multiple brands and delivered the Aktiv Tablet Android project end-to-end, including Bluetooth pairing and releases for a 21.5" device.

Kotlin Android Jetpack Compose Bluetooth MVVM Android TV Performance Optimization CI CD

Lead Developer

Flashmove

Jun 2017 - Dec 2024 (7 years 6 months)

Co-founded and led development of an IoT-based LED training system for athletes using Android native, WebSockets and Firebase, and implemented training algorithms for reaction speed and accuracy.

Android Kotlin Java Arduino WebSockets Firebase IoT Algorithm Design

Senior Android Developer

EXi

Nov 2023 - Jan 2024 (2 months)

Enhanced a fitness app with new Kotlin features, streamlined performance through refactoring and reduced crashes while estimating Jira tasks and managing Bitrise workflows.

Kotlin Android Refactoring Performance Tuning Crash Reduction Jira Bitrise Unit Testing

Senior Android Developer

RS Admin

Oct 2022 - Jan 2023 (3 months)

Led design and implementation of an internal admin and analytics app using Jetpack Compose, added invoice upload features and documented feature plans with Jira.

Kotlin Android Jetpack Compose OpenAI SDK Jira Documentation Firebase

Senior Android Developer

MasterClass

Jan 2021 - Sep 2022 (1 year 8 months)

Built and maintained Android mobile and TV apps, delivered features like Picture-in-Picture, multi-profile, dynamic homepage and improved test coverage and ADA compliance.

Kotlin Android TV Jetpack Compose PIP Accessibility Testing Code Review CI CD

Ssr Android Developer

Banco Hipotecario

Apr 2020 - Dec 2021 (1 year 8 months)

Contributed to the bank's Android app transformation by redesigning navigation, adding expense-tracking modules, refactoring legacy code and improving stability and Play Store deployments.

Kotlin Java LiveData Android Refactoring Navigation Stability Improvements Stability Improvement

Junior Android Developer

Royal Caribbean

Aug 2018 - Mar 2020 (1 year 7 months)

Developed modules for the guest app including interactive ship maps and emergency video features, and supported planning, estimation and delivery activities.

Android Java Kotlin MVVM Jenkins

Education

Degrees, certifications, and relevant coursework

Universidad Nacional del Sur

Bachelor's Degree, Computer Systems Engineering

2011 - 2017

Bachelor's Degree in Computer Systems Engineering completed at Universidad Nacional del Sur, focusing on software development and systems engineering between 2011 and 2017.