Ronnie Pereira

I have over 8 years of experience in IT and 6 years as a Software Engineer, specializing in back-end development. I am proficient in microservices using JavaScript, Node.js, and TypeScript, with solid experience in AWS Cloud services such as S3, SQS, and EC2. I also have strong knowledge of infrastructure fundamentals, including networking and Linux (LPIC-1 and Linux+ certified), as well as experience with Infrastructure as Code, primarily using AWS CloudFormation for infrastructure provisioning and management.

Backend Developer at Efí Bank (2022-10 – Present)

Team member responsible for developing systems for money laundering detection and prevention.

• Supported and enhanced the performance of critical functions within the existing system.
• Developed features for a prevention system related to a new company product.

Backend Developer at Enext Company (2021-09 – 2022-10)

Backend team member tasked with designing new features and upkeeping Node.js checkouts for a significant e-commerce in Brazil.

• Supported and developed new functionalities for an online checkout processing over 3,000 orders monthly.
• Created an important tool to facilitate the integration of e-commerce with Google Ads Shopping.

Backend Developer at Weesu Technologies (2020-11 – 2021-09)

Responsible for developing integrations with marketplace platforms such as Amazon and Shein

• Developed 2 new integrations with international markets.
• Developed 3 new integrations with national markets.
• Monitored and provided support for dozens of product and order integrations daily.

Fullstack Developer at SMARAPD (2020-04 – 2020-11)

Member of the team responsible for developing a new tax product (made for city halls).

• Member of the team responsible for developing the system's tax module.
• Mainly using ReactJS and .Net Core Performing activities such as developing new screens, fixing bugs, and suggesting improvements in the software

Development Analyst at CCM Technologies (2019-08 – 2020-04)

Responsible for maintaining legacy systems and developing new integrations for the company.

• Developed one integration responsible for integrating client's payments and billets.
• Correction of dozens of bugs in the monitoring system.

Monitoring Analyst at CCM Technologies (2018-10 – 2019-08)

Team member responsible for managing the monitoring tool (Zabbix).

• Supervising approximately 1000 hosts, developing templates to enable monitoring of new applications, and performing improvements and corrections in the tool.
• Helped to make improvements in operating systems (Windows Server, Linux).
• Helped to deploy and manage the firewall, including connectivity through VPN.

Backend Developer at Duko - CRM Performance (2025-08 – 2025-10)

Led the design and development of integration systems connecting Salesforce CRM to multiple ERP platforms.

• Planned, developed, and maintained three integration solutions connecting clients, products, and order data with ERP systems such as Totvs, Auditor, and Atak.

Bachelor in Computer Science – Unifran University (2024)

Associate in Information Technologies – SENAC (2016)