Java Developer in Warsaw, Poland
Member since July 21, 2015
Tomasz is a creative developer with over ten years of experience at designing and implementing Java applications. He is a team player, enthusiastic about learning new technologies and trying out different ideas and approaches to process improvement. Tomasz has worked for international companies (Hewlett-Packard) as well as for Silicon Valley startups. Currently he helps small and medium companies to create Java-based solutions.
Tomasz is now available for hire
Portfolio
- DextCloudSpring Boot, Camel, Google Cloud Platform, AWS
- Volunteer in NGOs in Warsaw. PolandScratch, Java, Various Robots
- UAfjord, Ltd. (via Toptal)Amazon API Gateway, Amazon SNS
Experience
- Java, 11 years
- SQL, 8 years
- Spring, 6 years
- Hibernate, 6 years
- JBoss Drools, 3 years
- JAX-RS, 2 years
- JAXB, 2 years
- AngularJS, 2 years
Availability
Part-time
Preferred Environment
IntelliJ IDEA, Eclipse
The most amazing...
...thing I've coded is a keyword-based language for performing business operations on objects in a rapid application development system.
Employment
Developer and Architect
2018 - PRESENTDextCloud- Created a REST API for the front-end application.
- Implemented OAuth2 Authorization Server.
- Implemented WebSocket server for the communication between the back-end and front-end apps.
- Designed and implemented the main logic of the application.
- Implemented a Spring Boot-based scheduler.
Technologies: Spring Boot, Camel, Google Cloud Platform, AWSProgramming Teacher
2013 - PRESENTVolunteer in NGOs in Warsaw. Poland- Taught programming to adults (Java) and kids (Scratch, robotics).
Technologies: Scratch, Java, Various RobotsAmazon API Gateway Expert
2018 - 2018UAfjord, Ltd. (via Toptal)- Integrated Shopify with Amazon SNS.
Technologies: Amazon API Gateway, Amazon SNSJava Back-end Developer
2016 - 2018Online Consulting Portal- Created a job portal for business consultants in Germany.
Technologies: Java 8, Play Framework, HTML, Angular 2Java Developer
2016 - 2018Optile GmbH- Integrated an online payment system with several payment providers and banks (e.g., Stripe, ConsultaPay, APCO, Payvision). The online payment system was written in Core Java.
Technologies: Java 8Developer
2016 - 2017Eprintwerx International- Built an AWS Lambda (Java) and AWS API gateway back-end for an application that served data for marketing purposes. The project had microservice-oriented architecture.
Technologies: Java 8, AWS Lambda, AWS API GatewayJava Back-end Developer
2016 - 2016ChessVision- Built a Spring-based complex client-server system for an application that allows users to record chess games.
Technologies: Java 8, AWS EC2, RESTful MicroservicesJava/Liferay Developer
2015 - 2016PFacto- Created a CRM application for a Dutch energy provider company. The application based on Java portlets implemented with Liferay.
Technologies: Java, LiferayJava AWS Developer
2015 - 2015Graywill, LLC- Created an application for online document generation for a small travel agency. The application was based on AWS Lambda functions.
Technologies: Java 8, AWS Lambda FunctionsSenior Java Developer
2011 - 2013Altkom (Poland)- Designed and implemented about five web applications for various customers using Spring and Hibernate.
- Created a desktop application using Swing and Drools.
- Completed two security and performance audits of online web applications (banking applications).
- Conducted technical interviews.
- Prepared around five high-level technical proposals for customers.
Technologies: Java, Spring, Hibernate, Drools, Liferay, SwingSenior Developer/Designer
2004 - 2011Hewlett-Packard- Designed and developed web and desktop applications for various customers (around fifteen projects for big international companies).
- Prepared around fifteen high-level and low-level designs.
- Planned teamwork and reviewed results for two projects.
- Provided software measurement (e.g., function point analysis).
- Helped analyze business processes and gather user requirements for around ten projects.
Technologies: Java, Spring, Hibernate, iBATIS, Ajax, Oracle, EJB, SQL, UML
Experience
- Using Spring Boot for WebSocket Implementation with STOMP (Publication)The WebSocket protocol is one of the ways to make your application handle real-time messages. The most common alternatives are long polling and server-sent events. In this article, Toptal Freelance Java Developer Tomasz Dąbrowski shows us how to implement WebSockets with the Spring Boot framework, and use STOMP for effective client-server communication.
Skills
Languages
Java, UML, SQL, C, Python, HTML, JavaScriptFrameworks
JUnit, Spring, Spring Boot, TestNG, Hibernate, Apache Camel, Selenium, Swagger, Swing, AngularJS, JSON Web Tokens (JWT), Apache CXF, Play FrameworkLibraries/APIs
JAX-RS, JAXB, JDBC, Commons HttpClient, JAX-WSParadigms
REST, Microservices, Continuous Integration (CI), Test-driven Development (TDD), Test AutomationTools
Apache Tomcat, Jenkins, JBoss Drools, AWS SDK, Papertrail, BrowserStack, Apache AntPlatforms
AWS EC2, Oracle, OpenShift, Amazon, Linux, AndroidStorage
AWS DynamoDB, AWS S3, MySQL, Redshift, MongoDB, PostgreSQLOther
AWS API Gateway, Apache Commons, WebSockets, Liferay, RESTful Microservices, Intercom, KSQL
Education
- Master's degree in Organization Managment2003 - 2007Gdansk University of Technology - Gdansk, Poland
- Master's degree in Computer Science1999 - 2004Gdansk University of Technology - Gdansk, Poland
Certifications
- Sun Certified Enterprise ArchitectAPRIL 2009 - PRESENTSun Microsystems
