Looking for a job

Grzegorz Krajniak

@grzegorzkrajniak

Message

I build cloud infrastructure, banking, travel, and airport platforms end to end.

Poland

Message

I've built full-stack systems for SAP, Bank of New York Mellon, and Amadeus, including SAP's next-generation cloud infrastructure services for the EU Commission, a secure bank-client document exchange platform, and airport operations products used across the Amadeus airport suite.

I work across TypeScript, Node.js, Angular, React, Java, Spring, AWS, Kubernetes, and microservices. I bring experience in greenfield delivery, API design, testing, performance improvements, technical documentation, requirements gathering, and Agile/Scrum teams.

Experience

Work history, roles, and key accomplishments

Current

Senior Full Stack Developer

Current

SAP

Mar 2021 - Present (5 years 6 months)

Lead Developer building open source cloud infrastructures and services for the EU Commission, and a greenfield project for managing application projects using micro frontends architecture.

TypeScript JavaScript Angular UI5 RxJS NgRX GraphQL Web Components WebSockets Go Bootstrap Jest Jasmine Cypress Playwright HTML CSS Azure Pipelines Kubernetes React DynamoDB OpenSearch Python Postman Jira Jenkins YAML

Senior Full Stack Developer

Bank of New York Mellon

May 2020 - Mar 2021 (10 months)

Worked on the Client Exchange project to build a platform for secure documentation exchange between the bank and its clients, using Agile/Scrum methodology.

Senior Full Stack Developer

Amadeus

Jan 2012 - Feb 2020 (8 years 1 month)

Worked on Amadeus Airport IT projects including AODB, Sequence Manager, and Sell Connect platform, with responsibilities in requirements gathering, technical solutions, prototyping, and development.

Java JMS Spring Cloud Spring MVC Selenium JavaScript jQuery Angular React Junit Mockito XML Maven JBoss Git Mercurial YourKit Bitbucket Jenkins Jira Nexus Eclipse Windows Oracle MS SQL Server MongoDB Docker

Senior Full Stack Developer

IT Kontrakt

Feb 2010 - Jan 2012 (1 year 11 months)

Worked on projects for PKO BP, Eurobank, and Asseco Poland, developing systems with Java EE, Spring, and other technologies, with responsibilities including requirements gathering, development, and testing.

Java Spring MVC Hibernate Grails Groovy EXT JS XML Maven Oracle Windows JMS Spring Boot Eclipse SOA Jira Hudson OSGi JPA Informix Junit Continuum

Full Stack

Speednet

Jun 2008 - Jan 2010 (1 year 7 months)

Worked on projects for Alcatel-Lucent, Atena, and Sentaca, developing systems with Java EE, Spring, and other technologies, with responsibilities including requirements analysis, development, and testing.