Nicolas is available for hire

Nicolas Queijo

Verified Expert in Engineering

Android Developer

Orlando, FL, United States

Toptal member since June 18, 2024

Expertise

Android Studio Slack Java Kotlin Unit Testing Computer Science Software Engineering Jetpack Compose GitHub MacOS GraphQL

Bio

Nicolas is an Android engineer with over half a decade of experience building robust and scalable apps for millions of users. He is proficient in Kotlin, Java, MVVM, Jetpack Compose, GraphQL, and unit testing. Additionally, he is skilled in the financial sector, as demonstrated by his professional Series 7 and 65 licenses. Nicolas' collaborative spirit and comprehensive financial and technical know-how make him an invaluable team player who drives innovative solutions.

Portfolio

M1 Finance

Android, Kotlin, Java

Experience

Android Studio - 7 years Java - 7 years Android - 6 years Kotlin - 5 years Unit Testing - 5 years GraphQL - 3 years REST - 3 years Jetpack Compose - 2 years

Availability

Part-time

Preferred Environment

MacOS, Android Studio, Slack, GitHub

The most amazing...

...thing I've single-handedly developed was a currency conversion app that reached tens of thousands of downloads.

Work Experience

Android Software Engineer

2021 - 2024

M1 Finance

Rebuilt the security/crypto trading flows used to trade millions of dollars daily, enhancing daily transaction speed by 35%, reducing friction, and improving user experience.
Coordinated with a cross-functional team to design and implement a set of reusable UI components, including buttons and lists, using Jetpack Compose and Figma.
Drove a shift to a test-driven culture, contributing over 300 unit and 20 snapshot tests for enhanced code coverage and project stability using JUnit 5, MockK, Strikt, Espresso, and Dropshots.

Technologies: Android, Kotlin, Java

Experience

Currency Converter

https://github.com/nicoqueijo/Android-Currency-Converter

An Android app that serves as a currency conversion tool using live exchange rates. The app implements the MVVM architectural pattern using a single activity with a fragment-swapping approach and data-caching capabilities that use a repository to fetch local or remote data. It was published on Google Play and has reached over 10,000 downloads.

Education

2015 - 2017

Bachelor's Degree in Information Technology

Florida International University - Miami, FL, United States

Certifications

JUNE 2023 - PRESENT

Series 65 - Uniform Investment Adviser Law Examination

FINRA

SEPTEMBER 2022 - PRESENT

Series 7TO - General Securities Representative Examination

FINRA

Skills

Tools

Android Studio, Slack, GitHub

Languages

Kotlin, Java, GraphQL

Paradigms

Dependency Injection, Unit Testing, REST

Platforms

MacOS, Android

Other

Finance, Computer Science, Software Engineering, Jetpack Compose

Collaboration That Works

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