Automation that gives your time back.

WildFly 26.x · JBoss 6 (domain mode) · RESTEasy 4.7.7 · Elytron · Azure AD · JAX-RS · Spring Boot · Vaadin

Migration of an application suite from the legacy JBoss 6 platform to WildFly 26.x for a client running multiple JBoss servers in domain mode — all requiring adaptation for WildFly compatibility, including configuration adjustments and application-code updates driven by dependencies on outdated libraries.

• Upgraded RESTEasy from the 2.x bundled with JBoss to 4.7.7 in WildFly, with the corresponding application-code changes.
• Replaced the Elytron module with a patched version enhanced for Azure AD integration — contributed upstream (GitHub PR #2193) and opened a Red Hat support ticket.
• Restructured the security model, moving custom application-level security logic into standardized WildFly configuration.
• Developed JAX-RS REST endpoints exposing APIs for legacy applications (Apache Struts 1.x, Eclipse RCP) being modernized with Spring Boot, Vaadin and other contemporary libraries.

Java 11 · Spring Boot 2.2 · Gradle · Hystrix · Jenkins · GCP: GKE, Spanner, BigTable, Pub/Sub, MySQL

Streaming-service backend: user registration and accounts, payments and content engagement. The US version had a dedicated team in the States; 100% remote with quarterly meetings in Warsaw (team grew from 4 to ~10).

• Analysing existing component interoperability and bug-fixing; refactoring and building new features.
• Encapsulating features into Java packages to migrate them from the monolith to microservices.
• Improving code quality (Sonar, Spotless) and test coverage; reducing technical debt.
• Daily scrum, including daily syncs with the US part of the team.

REST API · Single Page Application

Web application supporting a bank relationship manager to profile a client and discuss customised products.

• Co-designing a REST API backend for an SPA frontend and the surrounding services.
• Implementing new features, testing and deploying to the available environments.
• Taking part in consultation sessions run by the client.

Spring Boot · Spring Cloud Config · CyberArk · microservices

Improving configuration and security across a suite of 30+ microservices — relocating file-based config to a config server and integrating with CyberArk.

• Initial implementation of microservices↔CyberArk integration.
• Liaising with client units to enrol sensitive data into CyberArk.
• Migrating configuration from files to a Spring Cloud Config Server.
• Handling the development lifecycle of the microservices.

Spring Boot · SOAP CXF · REST · Hystrix · DB2 · Jenkins/Bamboo · Nexus · JBoss

Taking over web services from a partner software house and launching them on an on-premise JBoss platform.

Java 8 · Spring Boot · Apache Camel · SOAP CXF · MyBatis · Oracle 11g CDC · Jenkins

A synchronization mechanism keeping data integrity between a legacy and a new system: every N minutes it polls 11 views fed by Oracle CDC, with Apache Camel EIP components (multicast, aggregator, splitter, seda) structuring the async pipeline. Also optimised in-house document-management SOAP clients and built scripted Jenkins CI/CD pipelines.

Spring · REST · Oracle · Docker · JBoss · LDAP/Kerberos

New features for a mobile payment platform per customer spec; Dockerizing JBoss and testing Kerberos-based authentication.

Spring Boot REST · MongoDB · Google Cloud Messaging · RabbitMQ

Back-end for a platform releasing and controlling IoT products for a major mobile provider.

Spring · Spring Boot · MVC · REST · Tomcat · Maven

Back-end for a web portal, as part of a team.

SOAP · SOA · BPEL · OSB · XML/XSLT · WebLogic · JDeveloper

An orchestration layer over Spring web services on Oracle’s SOA platform — file read/write and binary↔XML↔CSV transformations using Enterprise Integration Patterns.

Spring · JAX-RS · Postgres · JS/jQuery · Tomcat

Front and back-end for on-the-fly report downloads: the user picks criteria, JS validates and AJAX-posts to a Spring controller that streams CSV back to the browser.

Java SE · JAXB · Postgres · Shapefile/DBF/XML · multithreaded

A tool applying XML-described map changes (road and maneuver attributes) onto the Shapefile format. A reactive engine on a JAXB listener spawns a Callable thread per change.

Maven · Jenkins · Liquibase

Bringing Liquibase into the CI pipeline — converting SQL scripts to parameterized changelogs (two reworked schemas, 9+ tables each), packed in jars.

Java SE · Sonar API · Freemarker · Jenkins

An app pulling code-quality data (test coverage, critical/blocking issues) from the Sonar API for selected Jenkins projects and rendering health graphs via Freemarker.

Java SE · JAX-RS · Embedded Tomcat · Maven Surefire/Failsafe · Jenkins

A framework testing web-service interoperability — it deploys Nexus snapshots/releases to Embedded Tomcat and cross-fires requests; wired into the CI pipeline via the Maven test goal.

Java SE · JAX-RS · Postgres

An HTTP client reading gzipped XML files from designated locations, unpacking and streaming them to a web service that loads them into Postgres.

Java SE · JAX-RS · JAXB · Postgres · Liquibase · Jenkins · TDD

Full-cycle (requirements → maintenance) toolkit apps for the client; as a Scrum team member, championing TDD practices.

JavaScript · Ant

UI development for a major set-top-box (STB) vendor using the client’s own JS framework, as part of a team.

JavaScript · QUnit · Ant · YUI Compressor

A JavaScript test harness running on the STB before the UI loads, exercising the Qt back-end — automating volume, channel changes and other specified operations.

Java EE · JSF/Facelets · EJB · GlassFish · MySQL

A Java EE application with JSF/Facelets and EJB on a GlassFish container, backed by MySQL.