Porto, Porto, Portugal
Brazilian Software Engineer graduated in Information Systems. Fluent in English and Spanish. Microsoft and ITIL certified Software Engineer with degrees in Ecommerce and Informatics. Possessing a strong background in software implementation, integration, and maintenance. Over 15 years of experience in designing, developing, and deploying solutions for diverse industry segments, including Human Resources, Editorial, Telecommunications, Entertainment, Health, Logistics, and Energy. My international experience includes collaboration with professionals from various countries such as Spain, Italy, Belgium, Portugal, the Netherlands, Ireland, United Kingdom, USA, Colombia, and Mexico. Work Authorization: Brazil, Portugal, Mercosur. I have preference for full remote work positions. – 10 years of experience in systems analysis, requirements gathering, object-oriented analysis, data modeling, and technical specification. – 15 years in systems development, maintenance, and testing for national and international companies. – 4 years of interaction with professionals from different countries, including 2 years in a technical project leadership role abroad, involving delegation and task follow-up. – 3 years of experience in negotiating with infrastructure and service providers. – 2 years of experience in defining IT tools and infrastructure for process improvement aligned with organizational requirements. – 2 years of experience in organizing and supervising the acquisition and updating of computer systems, both hardware and software (licenses, servers, contracts). Specialties: Systems Analysis, Requirements Analysis, Functional Analysis, Software Development, Project Management, SCRUM Agile methodology, Waterfall methodology, ITIL, Software Testing, Continuous Integration, C# programming language, ASP.NET MVC, Entity Framework, Windows Forms, WPF, WCF, .NET Core, ASP.NET Web API, JavaScript, Angular 6, TypeScript, jQuery, HTML5, CSS3, XML, XSD, XAML, Redis, SQL Server, PHP, MySQL, MongoDB, BPM, UML, Git, Prototyping, Database Modeling, and Administration. https://www.juniormayhe.com
- Contributed to the design, development, and enhancement of scalable, reliable, and maintainable SaaS KYC products within an Agile framework, collaborating with UK and Ireland teams including Principal Engineering, DevOps, SRE, Architecture, and Product Management. - Designed and developed robust framework components supporting both existing and new product capabilities, ensuring adaptability to evolving requirements. - Applied best practices such as Event-Driven Architecture and the Outbox Pattern to improve product quality, resiliency, and fault tolerance. - Built RESTful APIs, defined their contracts, and authored comprehensive documentation to support integration and maintenance. - Deployed and managed cloud applications in Microsoft Azure using Docker, Kubernetes, and Infrastructure as Code methodologies. - Utilized Apache Kafka and Confluent Cloud for distributed messaging, enabling reliable communication between microservices. - Drove continuous improvement of engineering processes and fostered a positive engineering culture by delivering demos to wider audiences and running onboarding sessions for new team members. Technologies: .NET, C# 12, REST API, xUnit, Moq, Apache Kafka, Confluent Cloud, MongoDB Atlas, Azure Key Vault, Azure Config Store, Azure App Configuration, Azure DevOps, Azure Pipelines, Azure Artifacts, Azure App Insights, Docker, Kubernetes, Visual Studio 2026.
- Development of Backend for Routing Service and Routing API Gateway for consumption of e-commerce microservices such as Order Management, Checkout and Create Order Service. - Development of the Frontend and Backend of the SHIELD system for CRUD of the Service Level Objective (SLO) monitoring tool. - Development of API REST endpoints, unit tests and integration tests. - Participation in SCRUM ceremonies in an Agile environment, focused on the delivery and commitment and continuous improvement of the software. - Migration of the Routing Service platform of the NET Framework for NET Core and NET Standard. - Development for contribution to other services and internal frameworks API Gateway and Cassandra; - Benchmark of different caching structures in REDIS for technical decision making on the structure that offers the fastest read and writes operations. - Creation and review of load scripts for Cassandra. - Deployment monitoring and utilization of services in Octopus, Kibana, Grafana and New Relic. - Technical documentation of services for Logistics cluster and development team regarding software architecture and existing and updated microservices functionalities. - Deployment of microservices Helm charts with ArgoCD to Kubernetes cluster for running and autoscaling containerized apps. Technologies: C# 7 and 8, .NET Core 2.x, .NET Core 3.1, React, Apache Cassandra, Redis, MongoDB, ASP.NET Core, Moq, Autofac, Autofixture, Apache Kafka, Microservices, LINQ, JSON, MockServer, GitLab, Proget, Team City, Grafana, Kibana, Jenkins, Octopus, Visual Studio 2019, Helm, ArgoCD.
- Plan, organize, manage, and oversee maintenance for Passenger and Driver Taxi Apps. - Implementation of software to migrate the Customer Service System development platform, from classic ASP to ASP.NET Core. - Development of a web page for real-time display of active taxi services on televisions, accompanying self-service terminals where taxi requests are made. - Development of WebAPI services to retrieve information from Oracle and coordination of .NET software development team to build a queue management system and control of customer service calls (DigiTurno). - Development of Email Marketing management app for sending newsletters and invoices to business partners, using Angular 6 with JWT authentication, NET Core WebAPI, and SMTP retransmission through Amazon Simple Email Service and Office365. - Functional testing of information systems, databases, and problem-solving; - Optimization of queries against Oracle database and creation of scheduled tasks for data loading between SQL Server servers. Technologies: .NET Framework 4.6, .NET Core 2.1, .NET Standard 2.0, C# 6, ASP .NET MVC 5.2, ASP.NET WebAPI, Angular 6, Ninject WebAPI 3.2, LINQ, JavaScript, jQuery 3.2, CSS3, HTML5, Bootstrap 4, Entity Framework 6, SQL Server 2012, Oracle 10g, VBScript, Classic ASP.
- Management of development team for registration of commercial negotiations between supermarket chain Éxito and its suppliers. - Development of integration with Teradata views (BigData) and formulas library for calculation of total business value, based on past business settlement bases. - Follow-up of change requests from users. - Development of unit tests with NUnit and Moq. - System architecture documentation for knowledge base. Technologies: SQL Server, Teradata, C#, .NET Framework, Visual Studio 2017, Jenkins, NUnit, SpecFlow, Software development in C#, Entity Framework, LINQ, ASP.NET, MVC 5, Javascript, Moq, WebAPI, Autofac.
- Management of external systems development teams in technology projects aligned with the company’s strategy. - Follow-up of project-related change requests, ensuring the scope, costs and deadlines agreed with IT suppliers. - Intermediation of suppliers responsible for integration between corporate systems, to ensure availability, efficiency, and security; - Evaluation of technical proposals from suppliers for new IT projects such as new Corporate Website, E-commerce platform, Firewall, Antivirus, Database Marketing, SEO, Print Outsourcing, Production and Backup Storage, E-mail Cloud Service, SSL Server Digital Certificate, Android, and iOS mobile app builders, considering market practices and technical perspective. - Development of availability tests in .NET for corporate systems; - Documentation of corporate network architecture, corporate backup, IT's work procedures and instructions for quality management and knowledge base. Used technologies: SQL Server, MySQL / MariaDB, Galera Cluster, PostgreSQL, Linux RedHat 6.5 / 7.1, Linux Fedora 23 Workstation, Linux CentOS 7, Zabbix, RedHat IDM/FreeIPA, PHP, WordPress, OpenSSL, OpenLDAP, Active Directory, Site24x7, PuTTY, WinSCP, C#, .NET Framework, Visual Studio 2017, Jenkins, MSTest, VirtuaBox, VmWare Workstation, HyperV, Bizagi, Enterprise Architect.