Messias Junior

MJ

Open to opportunities

Messias Junior

@messiasjunior

Senior Android engineer specialized in Kotlin and Jetpack Compose.

What I'm looking for

I seek senior mobile roles focusing on Kotlin/Android where I can lead architecture, deliver secure fintech/travel products, collaborate cross-functionally, and grow into technical leadership.

I am a Senior Android Engineer with over 7 years focused on mobile and a 12-year software engineering background, experienced in delivering scalable Fintech and Travel solutions using Kotlin, Jetpack Compose and Kotlin Multiplatform. I have deep proficiency in Hilt, Coroutines and modern Android SDK practices, and a strong track record building regulated fintech products and consumer travel apps.

I have contributed as an Android developer for companies and clients including Chip, Trainline, TUI, Volkswagen AG, Natixis and SIBS, working across architectures such as MVI and Clean Architecture and technologies including Retrofit, Room, RxJava and Dagger/Hilt. I prioritize clean, testable code, cross-functional collaboration, and shipping secure, user-focused mobile experiences.

Experience

Work history, roles, and key accomplishments

CH

Current

Android Engineer

Current

Chip

Jan 2023 - Present (2 years 11 months)

Develop and enhance features for Chip's savings and investment products in a regulated fintech environment, delivering secure, scalable user experiences.

Kotlin Jetpack Compose Hilt Kotlin Multiplatform MVI Firebase CI CD

YL

Android Engineer

YLD

Jan 2021 - Jan 2023 (2 years)

Consulted at Trainline to develop features for ticket search and purchase, improving travel booking functionality and app reliability.

Kotlin RxJava Dagger 2 Retrofit Android Jetpack Material Design Cross Functional Collaboration

CP

Android Engineer

COCUS Portugal

Jan 2020 - Jan 2021 (1 year)

Consulted at TUI to implement holiday travel app features using modern Android patterns and libraries to improve user experience.

Kotlin RxJava Dagger 2 Retrofit ROOM MVI Android SDK

AS

Java Software Engineer

Alter Solutions

Jan 2019 - Jan 2020 (1 year)

Developed and maintained backend applications for Volkswagen AG and Natixis Portugal, handling investment and retail portal functionality.

Java Spring Boot MongoDB MySQL Docker Git Firebase CI CD

SI

Android Engineer

SIBS

Jan 2018 - Jan 2019 (1 year)

Contributed to MB Way rewrite from Java to Kotlin and developed payments features to improve reliability and maintainability of the payments app.

Android Kotlin RxJava Android Jetpack Material Design Mobile Payments Testing

Education

Degrees, certifications, and relevant coursework

FC

Federal University of Ceará

Bachelor, Systems and Digital Media

2012 - 2017

Bachelor in Systems and Digital Media with coursework in systems and digital media completed from 2012 to 2017.

JS

José Maria Falcão Professional School

Technical Education, Computer Science and Programming

2009 - 2011

Technical education in computer science and programming completed between 2009 and 2011.

Tech stack

Software and tools used professionally

Retrofit

GitHub

MySQL

MongoDB

Gmail

Spring Boot

Android SDK

RxJava

Java

Kotlin

DBFlow

Firebase

Android Jetpack

Bitrise

Jetpack

Dagger

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Messias Junior - Android Engineer - Chip | Himalayas