Steven Ceballos León
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Detail
Senior Android Engineer - Tech Lead
Colombia
Contact Steven regarding:
Flexible work
Starting at
USD50/hour
Résumé
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Senior Android EngineerGlobantJan 2022 - Current (4 years 6 months)- Android Tech LeadPerficient Latin AmericaJan 2021 - Jan 2022 (1 year 1 month)• Lead Developer for the transportation industry based on Canada. SafeFleet. • Led a mobile developing team that was responsible for creating, testing and implementing new features. • Maintained a high-quality coding throughout all phases of development and ensured all submitted code meet this standard. • Increased the code coverage for all applications from 4% to 51% in less than a year. • Led the company’s mobile growth development department and oversaw conducting technical interviews for promising candidates. • Managed tasks within the Agile framework, cleared sprinted tasks and controlled JIRA workflows. Stack: Android - Kotlin CLEAN Architecture + MVVM SOLID Principles Jetpack Library(Room, Hilt) Coroutines & LiveData Unit Testing wi
- Senior Android EngineerPerficient Latin AmericaNov 2019 - Jan 2021 (1 year 3 months)• Mobile Developer for the transportation industry based on Canada. SafeFleet. • Oversaw designing the overall mobile architecture from scratch for an app used in the transportation industry. • Developed and implemented features for various native Android applications in Kotlin. • Worked with US and Canada based clients to define and implement solutions for their apps. • Wrote elegant, self-documenting code, easy to read and adapt for other developers. • Fixed bugs and improved application performance. • Tested code for robustness, created unit test and UI test using Espresso. Stack: Android - Kotlin CLEAN Architecture + MVVM SOLID Principles Jetpack Library(Room, Hilt) Coroutines & LiveData Unit Testing with Mockk - Junit4 - Junit5 Jenkin
- Android & Web DeveloperWaco ServicesSep 2018 - Nov 2019 (1 year 3 months)• Created an android app called "Quote & Buy" where I had to design, develop and test all the way to deployment in the Google play store. • Created a react js web platform for the video gaming industry where I had to design, develop and test a video games tournament platform all the way to deployment in the web. • Created a react js web site for the supermarket industry called "Supermercados Canaveral" where I had to design, develop and test all the way to deployment in the web. Stack: Android - Java MVP Firebase(functions, cloud messaging, firestore, remote config, analytics, crashlytics) NodeJs ReactJs
- HAndroid DeveloperHabacuc Soluciones Empresariales SASOct 2017 - Nov 2018 (1 year 2 months)• Created an android app for residential apartments to manage all day-to-day events such as keeping track of who entered and exited the apartment by scanning their id, setting up meeting events for all the tenants and vehicle inspection by taking picture or creating alert notices to the tenant if something happened to their vehicle. • Created an android app for "Comfandi" an NGO dedicated to providing social services. The main feature was to create a voting system where the representatives could scan their candidates’ barcodes and vote for the next executive board of the company. Also, the data of the results would be shown in the form of graphs, voting lists and voting totals. • Created an android app for political campaigns in Panama. The
- HAndroid DeveloperHappy Happy IncFeb 2017 - Sep 2017 (8 months)• Created 2 mobile apps for a Start-up both based on a collaborative economy where users could offer services/goods. • The first called "HappyHappy" for users to choose which homemade food they wanted to eat and by using real time chat could cater the food to their taste. • The second app called "HappyExpress" was for deliveries to be sent to their address based on geolocation services. Stack: Android - Java MVC Firebase(cloud messaging) PHP Webservices Postgress Database
- Software Developer & ResearcherServicio Nacional de Aprendizaje SENAApr 2016 - Dec 2016 (9 months)• Worked in an internship for a research center of electricity and industrial automation CEAI, where I worked on 2 national award-winning mobile apps related with home automation. • Collaborated with a team of 4 developers to develop an IoT android app that turned on/off light bulbs, security alarms, air conditioning, opened/closed doors, windows, camera live-feed transmission and read the thermostat sensor. • Worked on a graduation project with 2 developers that consisted of creating an AR application that interacted with a plastic model attached to a raspberry-pi with sensors. Where objects were scanned and could be interacted with in the AR space with the same functionalities as previously mentioned. Stack: Android - Java MVC Raspberry
- WorldSkills Colombia CompetitorWorldSkills InternationalOct 2015 - Jun 2016 (9 months)• Competed in the World Skills Colombia 2015 - Bogota competition. The contest consisted of 5 days where each day a new android mobile app must be created. Was awarded second place silver for the work done on the mobile apps. • Due to the silver medal obtained in 2015, In 2016 competed in the World Skills - Popayan competition again this time was awarded 1st place. • This award led to competing in one final knockout round to decide who would go to represent Colombia in the World Skills International tournament. Was awarded second place.
Education
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- Especialización tecnológica en desarrollo de aplicaciones móviles, Ingeniería de softwareServicio Nacional de Aprendizaje SENAJan 2019 - Dec 2020 (2 years)• Learnt how to develop native android applications using Kotlin. • Learnt how to develop hybrid applications using Flutter.
- ISystems Engineer, Systems EngineeringInstitucin Universitaria Antonio Jos CamachoJan 2017 - Dec 2020 (4 years)• Thesis: Technological development of a T-Learning training platform based on HbbTV to support ubiquitous training processes in complementary courses at UNIAJC. [https://repositorio.uniajc.edu.co/handle/uniajc/243] • Led several academic investigations on topics related to T-Learning services. • Presented these findings in peer reviewed symposiums. • Learnt how to work with Scrum agile methodology. • Learnt how to develop web applications using frameworks such as Angular, ReactJs. • Learnt how to develop hybrid applications using Ionic.
- Tecnólogo en Análisis y Desarrollo de Sistemas de Información, Tecnología/Técnico de software informáticoServicio Nacional de Aprendizaje SENAJan 2015 - Dec 2017 (3 years)• Learnt algorithms. • Learnt how to develop native android applications using Java. • Learnt how to develop web applications using HTML + CSS + JavaScript + PHP. • Learnt how to develop desktop applications using Java. • I competed in WorldSkills Colombia 2015 - Mobile apps development. 🥈 • I competed in WorldSkills Colombia 2016 - Mobile apps development. 🥇 • I competed in the final knockout WorldSkills Colombia 2016 - Mobile apps development. 🥈
- Técnico en programación de Software, Tecnología/Técnico de software informáticoServicio Nacional de Aprendizaje SENAJan 2013 - Dec 2014 (2 years)• Learnt algorithms. • Learnt how to develop web applications using HTML + CSS+ JavaScript + PHP. • I competed in SenaSoft Colombia 2014 - Algorithms. 4th place
Projects (professional or personal)
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