Piotr J.

Work in computer science as Lead Software Engineer (J2EE, Java SE, SQL).

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Wejherowo, Poland

Experience

Jan 2025 - Dec 2025
1 year
Kraków, Poland
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OEC

  • Development, maintenance and tests of automotive projects related to parts management with Angular, Spring Boot and Apigee API
  • Usage of MyBatis, Swing and JGoodies frameworks
  • Migration of legacy code of frameworks and tools related to versioning, validation and conversion of data in authoring services managing parts, fluids and prices
  • Project organized in SCRUM methodology with Azure DevOps
Jan 2024 - Sep 2024
9 months
Gdańsk, Poland
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GlobalLogic

  • Designed, developed and tested IoT solution delivering UI, business logic and persistence tier for data retrieved by network of sensors as a consultant in Verizon company
  • Built software platform on Spring Boot WebFlux with Apache Kafka (MSK) as event streaming and JOOQ as database mapping solution
  • Developed GitLab CI/CD pipeline with Terraform and Helm to automate infrastructure creation and perform Kubernetes (EKS) deployments
Jan 2023 - Aug 2023
8 months
Gdańsk, Poland
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Astek Polska

  • Full stack web development and maintenance of the invoice handling application based on Websphere Liberty Profile with proprietary UI framework
  • Implemented backend business logic for semantic and syntactic validations of user inputs
  • Created flows and calls to invoke modules in the monolithic architecture
  • Developed, designed and tested replication module implementing Self Contained Service architecture using Kafka Streams to log database modifications
  • Wrote Mockito and JUnit tests meeting code coverage requirements
  • Applied object-oriented programming, SOLID principles and design patterns
  • Performed optimization, refactoring and static code analysis
  • Conducted code reviews and debugging in Eclipse and IntelliJ
  • Worked in SCRUM and SAFe methodologies
Jan 2023 - Mar 2023
3 months
Gdańsk, Poland
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Lufthansa Systems

  • Continued project for Hapag-Lloyd, working on employee shift scheduling application
  • Developed REST endpoints in the backend based on Spring Boot
Jan 2022 - Jan 2023
1 year 1 month
Wrocław, Poland
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Ryanair Labs

  • Developed backend Java projects on AWS infrastructure using Spring Boot with Spring Cloud, DynamoDB, Hibernate, SQS, RDS, EC2, Lambda, CloudFront and CloudFormation
  • Performed data migration with MySQL and Aurora
  • Utilized Spring MVC and Reactor frameworks
  • Monitored logs with Kibana and New Relic
  • Developed tool based on DynamoDB NoSQL database to replicate data and improve performance
Jan 2022 - Jul 2022
7 months
Gdańsk, Poland
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Astek Polska

  • Developed and maintained web application for Hamburg Sud based on JBoss AS with JSF and Hibernate allowing business users to manage cargo vessel schedules
  • Worked in SCRUM methodology
Jan 2020 - Nov 2020
11 months
Gdańsk, Poland
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Maxima Europe

  • Designed and developed monitoring tool for State Street Corporation to control financial data and transactions using Spring Boot, Apache Kafka, Oracle DB and ReactJS
  • Implemented Streams API, Consumer API and Producer API on multiple brokers and partitions
  • Handled REST API to transfer data between frontend and backend
  • Developed ReactJS application deployed on Spring Boot instance
  • Used Hibernate with HQL, JPQL and Criteria queries for persistence layer access
Jan 2019 - Sep 2021
2 years 9 months
Gdynia, Poland
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Vector Smart Data

  • Developed and maintained data acquisition system and monitoring center using JBoss AS, JSF and Hibernate
  • Created microservices handling domain-specific features with Spring Boot and REST
  • Worked in SCRUM methodology
Jan 2015 - Aug 2017
2 years 8 months
France
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Amadeus

  • Designed, developed and tested internal deployment software for company applications and data using SOA, J2EE and JBoss AS
  • Maintained continuous integration workflow with Jenkins, GIT Stash and Maven
  • Rolled out quality assurance procedures including ALM and code review
  • Supported release activities and implemented solution to replicate legacy application data to SQL database using SQL and JMS
Jan 2012 - May 2012
5 months
Grenoble, France
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France Telecom, Orange Labs

  • Researched and developed monitoring service for memory and processor resources usage on OSGI platform
  • Profiled threads and sampling methods in Java
  • Developed graphical interface in Java, Ajax and C/C++ to control services on OSGI platform
  • Detected malicious and low-quality bundles and implemented alerts and triggering using Package Resolver
  • Applied Autonomic Manager system design and worked with JVM API, JVMTI and native methods
  • Analyzed Felix OSGI environment and conducted performance tests with SIGPROF Unix signals
Jan 2011 - Dec 2011
1 year
Paris, France
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Alcatel-Lucent

  • Introduced test framework to automate functional tests of wireless network provisioning application
  • Developed technical documentation generator in Java and Ruby; tests in Cucumber, XML and XSL
  • Worked in Agile and SCRUM frameworks with JIRA and Hudson CI
  • Developed with DocBook, XSL, XSLT and Apache FOP
  • Created Eclipse plugin (OSGI) integrating semantic checks with proprietary IDE
  • Integrated with Hudson CI server and Maven build automation
  • Delivered gems and plugins to common repository
  • Designed test cases handling given-when-then logic and created domain-specific language for wireless management solution testing
  • Wrapped kernel methods with JRuby on JVM and used Nexus for artifact deployment and SVN for source code management

Languages

Polish
Native
English
Advanced
German
Intermediate
French
Intermediate

Education

Oct 2012 - Jun 2012

Gdansk University of Technology

Master of Science, majoring in Computer Electronics Systems · Gdańsk, Poland

Oct 2012 - Jun 2012

Telecom Bretagne

Master of Engineering, majoring in Software Systems and Networks · Rennes, France

Certifications & licenses

Oracle Certified Associate, Java SE 7 Programmer

Oracle

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