Jose R.

Development of a B2B e-commerce application for a fashion company, based on scalable Spring Boot (2.7) REST API microservices developed in Kotlin (1.7).

The platform is composed by a "core" project (a Spring-Boot starter library with all the common components and services shared by all the microservices) and a set of microservices focused on specific business areas.

Some of the features I have worked on are:

- Defining JPA specifications to encapsulate repository queries.

- Creation of Spring-batch scheduled jobs for handling a large number of records with focus on performance and data transactionality.

- A fully configurable dynamic reporting engine to create complex reports in Excel just by defining the query.

- Mapping automation with MapStruct.

- Fine tuning of the Spring Websocket Message Broker for real-time process updates.

- Configuration of auto-generated Swagger clients to build clients from OpenAPI 3 definitions.

- Increased code coverage to 90% on average using unit and integration tests with JUnit 5.

- Creation of the core commons starter library to limit duplication and improve development speed due to the reduced complexity of the new microservices definitions.

- Impact analysis and technical definition for a new microservice based on the BFF (Backend for Frontend) pattern to increase user experience and performace.

These microservices are deployed in Kubernetes pods on AWS. This process runs automatically using Jenkins pipelines, but I am comfortable using kubectl commands, and command line in general, due to the fact that I am a Linux user. Finally, all these microservices are fully monitored using Kibana and Grafana dashboards.

Development of a new eHealth platform, based on Spring boot REST API microservices, designed to provide a common infrastructure and features for all the eHealth applications. Some of these features include: mobile notifications, customizable questionnaires, recommendation engine, integration with third-party APIs to retrieve user tracking data, load balancer, service discovery, security, API gateway, CDN, video calling, chat and reverse proxy, among others. These microservices are deployed in AWS inside Docker containers defined in a docker compose file. The tasks of the role include the development, deployment and management of the infrastructure.

Technologies and elements of the platform: Spring boot 2.3, Zuul API Gateway, Feign clients to communicate microservices, Eureka service discovery and load balancer, Nginx reverse proxy, RabbitMQ as messaging cue, REDIS as cache memory...

Development of new applications, from scratch, using the aforementioned platform. These applications provides specific functionalities such as: user management, patient monitoring, gamification, data collection through questionnaires and monitoring of physical activity and sleep. These features are exposed by a REST API and consumed by an Angular frontend. In relation to FE, the application uses common components provided by third-party libraries and custom ones using a layered pattern. Styles are defined using SASS templates.

Technologies used: Spring boot 2.3 for the backend (Java/Kotlin) and Angular 8 for the frontend.

Development of new features and lifecycle control of a Workforce Management System for retail