Walter F.
Back-end and Systems Engineer

Skills

Spring Boot

Spring

Hibernate

Github

Microsoft Sql Server

Oracle Database

Java

Python

Postgresql

Mysql

Amazon Aws

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Bio

Back-end developer with over two years of professional experience specializing in the development of scalable REST microservices using Java Spring Boot. Involved in projects employing technologies including Hibernate, Jenkins, SonarQube, and version control systems such as GitLab, BitBucket, and GitHub. Proficient in both Test Driven Development (TDD) and Behavior Driven Development (BDD) frameworks, utilizing Cucumber for enhanced testing processes. Skilled in database management with expertise in Oracle, PostgreSQL, MySQL, MongoDB, and DynamoDB. Additionally, possesses experience with Apache Camel and Kafka middleware technologies.

Java Developer
3/1/2023 - Present

Developed proficiency in managing business billing processes, focusing on back-end development and maintenance. Maintained and enhanced existing microservices while addressing incidents and developing new scalable microservices using REST, Spring Boot, JPA, Hibernate, Maven, and Gradle. Demonstrated expertise in version control with BitBucket, and utilized Jenkins for deployment processes. Worked extensively with Oracle and MongoDB databases. Applied test-driven development principles to create unit tests using WireMock and JUnit.
Junior Software Engineer
7/1/2022 - 1/1/2023

Successfully implemented the Online Settlement Project, focusing on Back-End development of scalable microservices utilizing REST and Kafka. Employed frameworks such as Spring Boot, JPA, and Hibernate, and maintained code with GitLab. Leveraged various AWS services including CI/CD with CodePipeline, SonarQube, DynamoDB, Amazon S3, Lambda, CloudWatch, and EMR. Developed unit tests using Test-Driven Development (TDD) and Behavior-Driven Development (BDD) methodologies, incorporating Cucumber and JUnit for comprehensive testing coverage.
Junior Software Engineer
6/1/2021 - 5/1/2022

Developed expertise in back-end development with a focus on creating scalable microservices using REST and Spring Boot. Leveraged JPA and Hibernate for object-relational mapping and database interaction. Extensive use of GitLab for version control along with continuous integration and continuous deployment (CI/CD) pipelines orchestrated via Jenkins and SonarQube to ensure code quality and automated testing. Created comprehensive unit tests following Behavior-Driven Development (BDD) principles using Cucumber. Demonstrated proficiency in database modeling and table creation in PostgreSQL, employing Liquibase for schema management. Utilized Apache Camel for integrating transactions from a mainframe system to be consumed by the application via JSON, ensuring seamless data flow between platforms.
IT Infrastructure Analyst
7/2/2019 - 6/1/2021

Analyzed and managed systems and infrastructure, monitoring credit card transactions with Amex, Elo, Master, and Visa networks. Ensured high availability and business continuity through preventive and reactive performance measures. Managed and implemented changes and improvements across various platforms, including data centers and mainframes. Demonstrated expertise in DB2, SQL Server, Teradata, and Oracle through extensive database scripting and execution.
Call Center Operator
1/2/2014 - 6/2/2019

Provided support to clients concerning corporate products, focusing on accessing the corporate website and various bank programs designed for cash flow management. Analyzed CNAB files associated with general payments and billing documents submitted by clients to ensure compliance with standard layout requirements. Developed expertise in financial analysis, corporate finance systems, and customer service. Enhanced skills in troubleshooting, documentation verification, and adherence to financial protocols and standards.
Technical Assistant Level 1
4/1/2012 - 12/1/2013

Provided expert support to clients in relation to the bank's corporate products, including troubleshooting issues with access to the corporate site, utilizing various bank programs for cash flow management, and conducting detailed analysis of CNAB files for payments. Ensured the accuracy and compliance of collection titles submitted by clients, verifying adherence to the bank's standard layout.