Frederico Gassen

Software Engineer

Amsterdam, North Holland, Netherlands6 yrs 1 mo experience

Most Likely To SwitchHighly Stable

Key Highlights

Architected solutions for millions of users.
Led release trains for high-quality app rollouts.
Pioneered Jetpack Compose adoption in major projects.

Stackforce AI infers this person is a Fintech and E-commerce mobile engineer with expertise in high-performance Android applications.

Contact

Skills

Core Skills

AndroidKotlin

Other Skills

Jetpack ComposeGitGoogle Play ConsoleCI/CDAndroid App BundleJavaMySQLUnit TestingFirebaseGradle publishingCameraXMultithreadingModularizationMVVM

About

Sr. Android Engineer at Uber with 7+ years of experience building scalable, high-performance mobile applications. Proven track record of architecting robust solutions for millions of users across the Fintech, E-commerce, and Big Tech sectors. Highly skilled in driving architectural modernizations, including the adoption of Jetpack Compose and Clean Architecture and resolving complex performance bottlenecks. Recognized for leading release trains, building SDKs from scratch, and delivering frictionless, secure user experiences at massive scale.

Experience

6 yrs 1 mo

Total Experience

1 yr 6 mos

Average Tenure

3 yrs 6 mos

Current Experience

Uber

3 roles

Sr. Software Engineer, Android

Promoted

Feb 2026 – Present · 3 mos

Acted as a core engineer on the In-Person Payments team, developing and optimizing secure, frictionless checkout experiences for both cash and digital QR code transactions.
Ensured high reliability and seamless integration for point-of-sale operations, directly impacting the final customer journey.

AndroidKotlinJetpack Compose

Software Engineer II, Android

Feb 2025 – Feb 2026 · 1 yr

Acted as a core engineer on the In-Person Payments team, developing and optimizing secure, frictionless checkout experiences for both cash and digital QR code transactions.
Ensured high reliability and seamless integration for point-of-sale operations, directly impacting the final customer journey.

AndroidKotlinJetpack Compose

Software Engineer II, Android

Nov 2022 – Feb 2025 · 2 yrs 3 mos

Pioneered the adoption of Jetpack Compose within the Financial Products team. Completely rebuilt the Uber Pro Card onboarding flow using Compose and Use Cases, achieving an outstanding 90% test coverage.
Engineered a comprehensive, real-time monitoring and alerting system for the flagship product. Built custom dashboards from scratch to proactively track app health and ensure high availability.

AndroidKotlinJetpack Compose

Scrumlaunch

Android Engineer

Sep 2022 – Nov 2022 · 2 mos · United States · Remote

Provided continuous technical support and feature maintenance for a US-based financial application, operating within a software studio environment.

AndroidGitKotlin

Kobe - creative software house

2 roles

Code Owner

Oct 2021 – Aug 2022 · 10 mos · Remote

Served as the Release Train Leader for the Decathlon Brazil app (1M+ downloads), orchestrating the end-to-end deployment lifecycle to ensure stable, timely, and high-quality rollouts to a massive user base.

AndroidGitGoogle Play ConsoleCI/CDAndroid App Bundle

Android Engineer

Aug 2021 – Aug 2022 · 1 yr · Remote

Spearheaded technical initiatives for the Decathlon Brazil app (1M+ downloads), successfully boosting the Google Play Store rating from 3.3 to 4.8 in just two months.
Completely rearchitected the critical cart and checkout flows using Clean Architecture principles, adopting Use Cases, Repository abstractions, Room database, and MVVM.
Implemented server-driven SSL pinning across all network requests to ensure maximum data protection and compliance.

AndroidGitKotlin

Act digital

Android Engineer

May 2021 – Jul 2021 · 2 mos · Brasília, Federal District, Brazil · Remote

Engineered the complete revamp of the checkout flow for Coopera, an e-commerce app with 100k+ downloads, delivering a seamless and modernized purchasing experience.
Implemented scalable MVVM architecture and developed Custom Views to ensure a highly responsive and maintainable user interface.

AndroidKotlin

Nelogica

Android Engineer

Oct 2020 – May 2021 · 7 mos · Porto Alegre, Rio Grande do Sul, Brazil · Remote

Optimized the Profit app (500k+ downloads) by rearchitecting complex chart views, drastically reducing memory leaks and improving rendering performance.
Engineered a robust, app-wide solution to resolve persistent ConcurrentModificationException crashes, ensuring thread-safe data handling.
Spearheaded the modernization of the app's architecture by starting the adoption of Kotlin Coroutines and Flow within the data layer.

AndroidKotlinGoogle Play Console

Caf

Mobile Engineer

Oct 2019 – Oct 2020 · 1 yr · Venâncio Aires - RS · Hybrid

As the first mobile engineer, I built the company's mobile team from the ground up and led the end-to-end development of critical identity verification products (liveness and document capture).
Key Achievements:
Architected native Android SDKs from scratch, heavily utilizing CameraX, custom sensors, and multithreading.
Led iOS development and successfully implemented the complete automated release train for all mobile SDKs.
Developed native bridges/wrappers for Flutter and React Native, enabling integration into major apps that handle thousands of daily active users.

AndroidJavaGoogle Play Console

Matchpal

Android Engineer

Apr 2019 – Aug 2019 · 4 mos · Santa Maria, Rio Grande do Sul, Brazil · On-site

Decreased app startup sync time by 83% (from 3 minutes to 30 seconds) on MATCHPAL, a sports calendar app, by implementing parallel processing for independent operations.

MySQLAndroidJava

Lifes creative tecnologia

Software Engineer

Mar 2016 – Jun 2016 · 3 mos · Venâncio Aires, Rio Grande do Sul, Brazil · On-site

Engineered a Point of Sale (POS) system from scratch in just 2 months to manage ticket sales for the Fenachim festival, successfully supporting an event with over than 150k attendees.
Implemented offline support to guarantee uninterrupted sales during internet outages, alongside SQL data export integrations for reliable backup and financial reporting.
Built a custom Android scheduling application utilized by local politicians.