Cleiton C.

Back-end and Systems Engineer

Senior Software Engineer at MEC
3/1/2022 - Present

Developed proficiency in maintaining and evolving complex systems such as SISU, FIES, SINAR, SigPET, and Carolina Bori. Demonstrated expertise in system architecture, software updates, and performance optimization. Skills honed include troubleshooting, patch management, and scalability improvements. Applied extensive knowledge in coding, scripting, and implementation of iterative updates. Worked collaboratively in a team setting to ensure system integrity and continuous operational improvements. Utilized various development tools and frameworks to provide robust and seamless system enhancements.

Senior Full Stack Developer
11/1/2021 - 3/1/2022

This role involved the architecture and implementation of APIs and microservices adhering to RESTful standards. Responsibilities included designing cloud architecture with FaaS, IaaS, and SaaS solutions, such as SNS/SQS, Lambda, Core IoT, and Serverless. Significant contributions were made in refactoring the UI/UX architecture for a mobile application and developing both the application layer (backend) and database systems. Key technologies utilized include Docker, NodeJS, React Native, Laminas, WebSocket.io, ExpressJS, HTML, CSS, TypeScript, JavaScript, Mezzio, Git, Gitlab, Jenkins, and Portainer. AWS services such as Lambda, SNS/SQS, S3, and Core IoT were integral to the cloud solutions developed. PostgreSQL was used for database management. Agile methodologies, specifically Scrum, were followed for project management. Achievements included improved performance, efficiency, and usability of a critical retail network application, enhanced business rule management, standardized infrastructure, and increased profitability through the release of new versions and products.

Senior Back-end Developer PHP
1/1/2019 - 7/1/2021

Architected and implemented new products and services encompassing the SEBRAE-DF platform including Totem, Supplier Portal, and a Mobile App with virtual store capabilities and Brain integration. Leveraged a diverse technology stack including Docker, NodeJS, Angular 7, Kotlin, Laravel 7, JQuery, JavaScript, Material, REDIS (PUB/SUB), AWS S3, Lambda (FaaS), SQL-Server (T-SQL), Moongo, and mongoose. Maintained code integrity and collaborative development using Git, Gitlab, and Git Actions.

Adopted Scrum methodology for efficient project management and iterative development cycles. Automated SEBRAE-DF supplier contracting systems which significantly optimized the bidding process by enhancing speed and convenience. Achieved notable recognition in the GP News magazine from Brasília in 2020 for the development of an innovative e-commerce platform. Extended product reach and increased sales with the mobile application, yielding record profits for SEBRAE-DF's e-commerce sector.

Senior Systems Analyst and Programmer
3/1/2012 - 9/1/2017

Specialized in solution architecture with a strong focus on microservices, developed expertise in designing and implementing distributed systems. Leveraged extensive experience as a Senior PHP Programmer to build robust applications, ensuring high performance and scalability. Conducted in-depth vulnerability analysis to identify and mitigate external and internal threats, enhancing overall security posture. Architected automated testing solutions to streamline development processes and improve code reliability. Provided critical support to the development team, fostering an environment of continuous improvement and knowledge sharing. Performed comprehensive API Gateway performance analysis to optimize system efficiency and ensure seamless integration across various services and platforms. Employed a diverse set of tools and frameworks to deliver high-quality, secure, and maintainable solutions.

Pleno PHP Developer
9/1/2008 - 5/1/2011

Developed and architected RESTful APIs and Microservices, implementing back-end and front-end programming solutions. Created sophisticated routines, procedures, and T-SQL functions, ensuring seamless integration with third-party APIs and financial systems. Utilized PHP Laravel framework extensively, alongside technologies such as SQL, JavaScript, jQuery, HTML, CSS, NodeJS, Sequelize, and Express, maintaining robust version control with Git. Adopted Scrum methodology to manage and streamline development processes. Contributed to the development of an e-commerce platform that became a benchmark in digital asset success, driving significant revenue growth. Enhanced user engagement and customer loyalty, receiving positive feedback from leadership and clientele.

Junior Back-end Programmer
4/1/2005 - 7/1/2008

Developed proficiency in PHP utilizing ZendFramework, coupled with extensive work in Javascript and Jquery for building interactive front-end functionalities. Utilized HTML and CSS to ensure responsive and semantic site design. Responsible for meticulous creation and optimization of SQL scripts, procedures, functions, and views, consistently prioritizing database performance. Developed a mobile application that seamlessly integrated with citywide HotSpots, enhancing user connectivity. Employed Scrum methodology for project management and development processes. Delivered notable achievements including client satisfaction through the automation of invoice generation and automatic debt settlements, contributing to the company's growth and regional expansion. Ensured stability and performance enhancements in both the application layer and front-end rendering, solidifying robust system operations.

Computer Science at Anhanguera
2013 - 2017

Computer Technician at Senac São Paulo
2013 - 2015

Computer Science at Harvard HBS CS50
2022 - 2022

Neo4j Graph Data Science Certification at Neo4J
11/1/2022

Cybersecurity Analysis Specialist at IBM
7/1/2022

Security Analyst Fundamentals Specialization at IBM
7/1/2022

Modern Supervisor Skills at ICPM Project Management Center
6/1/2022

Oracle Cloud Data Management 2022 Foundations Certified Associate at ORACLE
6/1/2022

IBM Cybersecurity Analyst Professional Certificate at IBM
6/1/2022

Linux and Private Cloud Administration on IBM Power Systems Specialization at IBM
6/1/2022

API Product Manager at API Academy Foundations
5/1/2022

API Designer at API Academy Foundations
5/1/2022

Oracle Cloud Infrastructure Foundations 2021 Associate at Oracle
5/1/2022

Advanced Web Development with PHP using Laravel and VueJS at Udemy
4/1/2022

Exploring Service APIs through Test Automation at Test Automation University
4/1/2022

Python Fundamentals for Data Analysis 3.0 at Data Science Academy
4/1/2022

NodeJS Expert at Hcode
3/1/2022

NodeJS Design Patterns at Udemy
3/1/2022