Gustavo Pereira - Software Engineer, Freelancer

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Work Background

ChargeblastData and AI Engineer

Oct. 2023

Variant PerceptionSoftware Engineer

Apr. 2022 - Apr. 2023Charlotte, North Carolina, United StatesDaily tasks & accomplishments: ● Led the development of a finance research platform, enhancing investor access to reports and dashboards using technologies like Express.JS, React, and AWS. ● Collaborated with the Sales team to design an analytics dashboard, improving insights into client behaviors and interests. ● Optimized cloud infrastructure with Amazon RDS, achieving seamless and scalable data management. ● Implemented Serverless Lambda and ELB, enhancing traffic distribution and system reliability. ● Utilized CloudWatch for real-time monitoring, ensuring proactive issue resolution. ● Successfully migrated critical financial models to the cloud, boosting performance and scalability. ● Modernized legacy models using a Python stack with Prefect, Saturn, and Kubernetes, streamlining orchestration and execution. Projects: ● Finance Research Platform Development ○ Led the development of a platform providing investors access to a diverse range of reports, charts, and dashboards. Utilized technologies like Expres.JS, React, Salesforce API, and AWS services such as Cloudformation, S3, ELB, and Lambda. ● Sales Analytics Dashboard ○ Assisted the Sales team in building an analytics dashboard to gain insights from client data, understanding their behavior and the topics of interest within our platform. Skills & technologies used: ● Express.JS, React, Salesforce API, AWS, Cloudformation, S3, ELB, Lambda, Amazon RDS (Relational Database Service), Serverless Lambda, Elastic Load Balancing, CloudWatch, Python, Prefect, Saturn, Kubernetes, communication, team work, adaptability, time management.

IBMSoftware Engineer

Oct. 2021 - Apr. 2022Hortolândia, São Paulo, BrazilDaily tasks & accomplishments: ● Developed and maintained a data visualization web portal showcasing datasets and predictive analytics results. ● Integrated machine learning models into the web portal for real-time data processing. ● Designed and implemented APIs using Python and Flask, leveraging Pandas for data manipulation. ● Utilized Angular with Carbon for frontend development, enhancing user experience and interactivity. ● Created and optimized data pipelines to support seamless data flow and processing. ● Developed automation scripts to streamline operations and reduce manual intervention. ● Managed the deployment process of machine learning models, ensuring their reliability and efficiency (MLOps). ● Executed ETL tasks and performed data engineering to prepare datasets for analysis by data scientists. Projects: ● Web Portal for Data Visualization & ML Integration ○ Developed a web portal focused on data visualization which displays datasets, prediction results, and runs machine learning models. The backend API was crafted using Python and Flask, leveraging Pandas for data manipulation, while the frontend was designed using Angular and Carbon. ● MLOps and Data Engineering Infrastructure ○ Oversaw the creation and maintenance of data pipelines, automation scripts, and the deployment of ML models. Conducted ETL and data engineering tasks to seamlessly integrate and manipulate datasets, thus facilitating data scientists in executing their models and analyses. Skills & technologies used: ● Python, Flask, Pandas, Angular, Carbon, MLOps, ETL, communication, team work, adaptability, time management.

SSYS SistemasSoftware Engineer

Sep. 2020 - Aug. 2021Daily tasks & accomplishments: ● Developed and maintained the Developer Experience (DX) platform focusing on DevOps as a Service. ● Implemented infrastructure as code practices to streamline development and deployment processes. ● Configured Helm for optimal Kubernetes component management. ● Integrated automated testing processes using Sonar Cloud to ensure code quality. ● Supported over 20 internal teams with the DX portal, assisting in application creation and maintenance. ● Collaborated with the SRE team to standardize CI/CD pipelines across the organization. ● Enhanced the CI pipeline, automating build, test, and deployment processes for the IT team. ● Provided continuous integration services to the organization via the DX platform. Projects: ● Developer Experience (DX) Platform Creation ○ Developed a DX platform centered around DevOps as a Service. The platform offered infrastructure as code, CI/CD, Helm configuration for Kubernetes, image handling, and automated tests using Sonar Cloud. This platform became an essential tool for over 20 internal teams, assisting them in creating, maintaining, and deploying their applications using the provided pipelines. ● CI/CD Pipeline Standardization with SRE Team ○ Collaborated with the SRE team to establish a CI/CD pipeline as a standard for the entire organization, promoting a consistent and reliable developer experience on our DX platform. This pipeline focused on automating build, test, and deployment processes, providing these functionalities "As A Service" for the IT Team on the DX platform. Skills & technologies used: ● DevOps, Infrastructure as Code, CI/CD, Helm, Kubernetes, Sonar Cloud, Continuous Integration (CI), communication, team work, adaptability, time management.

Cadmus Soluções em TI Software Engineer

Oct. 2019 - Sep. 2020Daily tasks & accomplishments: ● Developed and maintained B2B marketplace modules with a focus on improving user experience for restaurant clients. ● Collaborated remotely with a team to refactor and enhance features of a legacy marketplace platform. ● Designed and implemented Microservices-based solutions, incorporating an API Gateway using Express.JS and GraphQL. ● Led the development of catalog and sellers API modules utilizing Java (Spring Boot). ● Managed product and category registration, inventory maintenance, and integrated third-party supplier APIs. ● Deployed and monitored services on EKS, ensuring optimal performance and reliability. ● Created and maintained CI/CD pipelines using Jenkins to streamline deployment processes. ● Developed Robotic Process Automation (RPA) tools and web scrapers tailored for the banking sector. ● Engaged in data extraction from government platforms, particularly for consigned loans. ● Applied machine learning techniques using Tensorflow, OpenCV, and NumPy to train models for Captcha recognition. Projects: ● B2B Marketplace Refactoring for Restaurants ○ Worked remotely with a client to refactor a legacy B2B marketplace targeted at restaurants. The newly developed marketplace utilized a Microservices architecture, featuring an API Gateway built with Express.JS and GraphQL. Personally developed the catalog and sellers API using Java (Spring Boot) which handled product and category registration, inventory, maintenance, and integrations with third-party supplier APIs. All services were deployed on EKS, with CI/CD processes managed using Jenkins. ● RPA and Scraper Development for Banking Sector ○ Created Robotic Process Automation (RPA) tools and scrapers specifically for the banking sector. These tools were designed to record consigned loans across various government agencies. Some tasks involved training Convolutional Neural Networks (CNNs) using Tensorflow, OpenCV, and NumPy to recognize Captchas.

Aska Assessoria ContábilIT Support Technician

Jan. 2019 - Oct. 2019• Performed maintenance of machines and servers. • Implemented backup routines and system updates. • Automated routine tasks using Python for reporting and integrations.