Antonio L.

Back-end and Systems Engineer

Senior Full Stack
4/30/2022 - Present

Served as Tech Leader for the B2B Connector project, which catered to multiple marketplaces and e-commerce platforms, leveraging technical expertise in Node.js, TypeScript, Google Cloud Pub/Sub, and microservices architecture. Managed the Quality Assurance of an NFT system architected with Node.js. Led the front-end team in the development of an e-commerce platform for a biotechnology company, utilizing Node.js, React, and TypeScript. Applied knowledge in MongoDB, Google Cloud Platform (GCP), CommerceTools, and Mirakl to ensure project success and system efficiency.

Structuring and Availability Leader
6/1/2021 - 4/30/2022

Contributed to the development of microservices for a leading interoperability project involving the conversion of examination results from a proprietary format to the international FHIR standard. The project demanded high volume and precision, processing 250 million clinical examinations annually. Faced the challenge of handling up to 3 examinations per second during peak periods across each Kafka topic, managing real-time results and batches of 50 thousand medical alert messages. The project also required processing historical data since 2016, covering approximately 26 million patient records.

Developed a meticulous approach to code analysis and planning to ensure optimal performance. Ensured the highest data accuracy standards were met, given the critical nature of medical information. Implemented rigorous practices such as code reviews, unit and integration testing, and validation with internal and external clients to ensure quality delivery.

Software Factory Leader
6/2/2020 - 6/30/2021

Developed a server responsible for maintaining a React-based front end and managing SSO authentication for the system. Achieved noteworthy performance and security benchmarks, including an A grade in security from Security Headers evaluation and obtaining a RedBelt certification following a rigorous penetration test conducted by a specialized team. This project highlighted technical expertise in React, SSO authentication protocols, and security evaluation and certification processes.

Totvs Partner
7/2/2017 - 6/30/2021

Developed the TOTVS Project Management (GPT) system for supporting projects within the Curitiba franchise, with seamless integration to Protheus through REST APIs. Enhanced the system to retrieve project information within seconds, utilizing a NodeJS job that calculates and compiles data efficiently for user-friendly presentation. Gained expertise in NodeJS and REST API integration while improving system performance.

Provided ongoing development support for WebConta, addressing specific support requirements and furthering proficiency in maintaining and enhancing existing systems.

Independent Software Developer
12/2/2015 - 7/2/2017

Developed three distinct systems with a focus on various industries and technological integrations. Created a management system for a chain of gyms, successfully integrating technologies such as biometrics, turnstiles, and an efficient billing system. Implemented a management system for an event company, featuring capabilities to generate invoices and CNAB files efficiently, thereby handling a large volume of clients. Designed and built an embedded system on a Raspberry Pi for temperature control in grain silos, demonstrating expertise in hardware-software integration and IoT applications.

Developer
9/2/2014 - 12/2/2015

Developed LiveClock, an electronic timekeeping system utilizing MySQL for database management, effectively integrating with legacy systems. Key features included user tracking, precise time clocking, and the implementation of an auditing system for time entries. Created a NodeJS-maintained web application for handling various approval processes such as purchase orders, terminations, production releases, and other user approvals, with a standout feature being real-time integration with Protheus (TOTVS) via a REST server.

Developer
4/2/2007 - 12/2/2015

Gained expertise in NodeJS by developing a new routine for generating system installation packages, significantly improving efficiency by reducing execution time from 4 hours to 37 minutes. This process, executed on a Linux server hosted in AWS, also resulted in substantial cost savings, reducing server expenses to a fifth of the original amount.

Additionally, played a key role in implementing an AI server capable of supporting up to 30 thousand simultaneous users. The server was responsible for receiving GPS tracking data, sending push notifications based on user location, and integrating with news content from Tribuna do Paraná. Furthermore, demonstrated proficient use of MongoDB for storing user data, preferences, and conversations, ensuring seamless and efficient data management for the system.

Systems Analyst
12/31/1999 - 1/31/2007

Implemented and supported the Protheus ERP system provided by TOTVS, focusing on the development of billing, inventory, CRM, Field Service, and Portals modules. Planned and implemented system functionalities based on requirement specifications, enabling significant improvements and providing user and client guidance on the developed programs. Managed projects with a focus on scope, deadlines, hours estimation, and quality, using various programming languages and project construction methodologies. Developed new requirements and maintained existing systems, identifying and resolving technical and procedural issues. Conducted compilation, debugging, testing, and correction of programs, while researching and evaluating available market systems. Budget planning for the technology department was conducted, along with maintaining contact with service providers and external suppliers. Achieved customization of special projects for over 50 clients.

Electronics Technician at Federal Center of Technological Education of Paraná
1994 - 1998

Bachelor's Degree in Computer Science at State University of Ponta Grossa
1998 - 2001

Specialization in Information Technology at Pontifical Catholic University of Paraná
2002 - 2003

MBA in Technological Entrepreneurship at Pontifical Catholic University of Paraná
2009 - 2010

Mirakl - Techno-Functional Introduction at Mirakl
5/31/2022

How to Create High Performance Teams at LinkedIn
11/30/2021