Java/Kotlin Engineer
Freelancing via UpWork
Keywords
Java (Programming Language)
Hibernate (Java)
PostgreSQL
OAuth
Single Sign-On
Kotlin
Skills
Java/Kotlin Development
Extensive experience in Java and Kotlin programming, with 16 years in Java and 4 years in Kotlin.
Full Stack Development
Proficiency in both frontend and backend technologies, including Spring Boot, Google Cloud/AWS, and SQL.
Team Leadership
Experience as a Team Lead in Java/Kotlin and Ruby on Rails projects, managing and coordinating development teams.
Cloud Technologies
Expertise in Google Cloud Platform, AWS, and cloud-native application development.
Database Management
Proficiency in SQL databases including Oracle, MySQL, PostgreSQL, and MSSQL, as well as ORM frameworks like Hibernate.
DevOps and CI/CD
Experience with continuous integration tools, version control systems, and deployment automation using Jenkins, Git, and Docker.
Microservices Architecture
Design and implementation of microservices-based systems using Spring Boot and related technologies.
Extensive experience in Java and Kotlin programming, with 16 years in Java and 4 years in Kotlin.
Full Stack Development
Proficiency in both frontend and backend technologies, including Spring Boot, Google Cloud/AWS, and SQL.
Team Leadership
Experience as a Team Lead in Java/Kotlin and Ruby on Rails projects, managing and coordinating development teams.
Cloud Technologies
Expertise in Google Cloud Platform, AWS, and cloud-native application development.
Database Management
Proficiency in SQL databases including Oracle, MySQL, PostgreSQL, and MSSQL, as well as ORM frameworks like Hibernate.
DevOps and CI/CD
Experience with continuous integration tools, version control systems, and deployment automation using Jenkins, Git, and Docker.
Microservices Architecture
Design and implementation of microservices-based systems using Spring Boot and related technologies.
Project history
02/2024
-
Present
Research and develop Java/Kotlin/Spring Boot module for calculation of estimated prices of goods based on financing instruments and market demand.
11/2020
-
01/2024
Java/Kotlin and System Design Expert
Freelancing contract with DevOp1
Development and maintenance of a set of microservices for data synchronization and unification.
09/2019
-
11/2020
Lead Engineer
Freelancing contract with Catalogic
Implement a new version of REST API for an enterprise backup system.
07/2017
-
07/2019
Lead Engineer
Freelancing contract with HTDevelopers.com
Enterprise / multi-tenant application for supporting Environmental Health Safety management.
04/2018
-
04/2019
Running own startup
Niedziello.pl
Developed application to help customers find shops open on Sundays.
09/2015
-
06/2017
Principal Software Developer
Sabre Holdings (TripCase.com)
Same as Team Lead + participating in architectural decisions.
09/2014
-
09/2015
Team Lead Software Development
Sabre Holdings
TripCase.com is a leading traveler application in the US.
11/2010
-
09/2014
Senior Software Developer
Sabre Holdings
Messaging platform for one of most popular traveler's applications in US (tripcase.com)
09/2008
-
10/2010
Java Software Developer
ComArch S.A Cracow
Responsible for design, development and testing of a SOA/Web Java messaging application.
02/2008
-
10/2008
Symbian C++ Developer
ComArch S.A Cracow
DLNA module which enables mobile devices to act as a client/server for multimedia content.
10/2004
-
01/2008
Java Developer
ComArch S.A Cracow
Responsible for developing OSS Console in 20 person team during implementations for DIS.
Local Availability
Only available for remote work
