Strong knowledge of Redis (Open or Enterprise)
Distributed application architectures using gRPC and Apache Kafka
Strong knowledge of Kubernetes, OpenShift and/or Amazon EKS
HTTP/HTTPS server: NGINX
Knowledge of techniques and patterns for developing high-performance, self-healing, and auto-scaling applications

Proven experience developing systems using Java/J2EE and related technologies:
Java 8, Java 17 and Java 21
Spring Framework
Spring Boot
EJB
JPA and Hibernate
Application servers JBoss and WildFly and HTTP servers Jetty, Undertow
Maven
IntelliJ or Eclipse
Use of digital certificates / Java Secure Socket Extension (JSSE)
Distributed application architectures using REST, SOAP web services, RMI
Implementation of REST APIs using Swagger
Excellent knowledge of implementing HTTPS (TLS) and Mutual TLS (mTLS) communication in Java
Good knowledge of application containerization and Docker
Strong understanding of integration concepts and architectures applying Event-Based Architecture and Event Streaming
Good knowledge of databases: Oracle Database and MongoDB
Strong skills in Object-Oriented Modeling and UML
Good knowledge of Apache Kafka or ActiveMQ
Basic knowledge of cloud computing principles
Solid knowledge of data formats, encoding and structures involving: JSON, XML, ProtoBuf (Google Protocol Buffers) or Apache Avro
Good knowledge of common design patterns (Reference: Gang of Four)
Intermediate English (reading, writing and speaking).

Senior Java Developer

Key skills