Piotr Pałka, Full-stack Developer in Kraków, Poland
Piotr Pałka

Full-stack Developer in Kraków, Poland

Member since September 11, 2017
Piotr is an experienced full-stack software engineer and IT consultant, who understands client perspectives, and turns ideas into high-quality products. He has expertise in both enterprise and startup environments. Having worked for corporations, banks, and software houses, Piotr has developed products used worldwide and helped startups and internal corporate systems using a variety of tech stacks.
Piotr is now available for hire


  • Toptal (via Toptal)
    Ruby on Rails, CanCanCan, RSpec, PostgreSQL, Jenkins
  • HSBC
    Java, SpringBoot, Microservices, Netflix Eureka, Maven, Git, Angular 7...
  • u2i
    React, Redux, Ruby on Rails, Sidekiq, Java, Chef, Jenkins, Docker, Hive...



Kraków, Poland



Preferred Environment

macOS, RoR, Java, React, Ruby, AWS, Git, JetBrains

The most amazing...

...platform I've built was Nielsen Social, a low latency system that continuously consumes hundreds of thousands of Twitter, Facebook, and Instagram posts.


  • Software Engineer

    2019 - 2020
    Toptal (via Toptal)
    • Member of the Toptal core platform team.
    • Participated in the security and permissions framework migration project.
    Technologies: Ruby on Rails, CanCanCan, RSpec, PostgreSQL, Jenkins
  • Full-stack Engineer

    2019 - 2019
    • Implemented microservices in the application integrating HSBC trader data.
    • Interviewed candidates for the software developer position.
    Technologies: Java, SpringBoot, Microservices, Netflix Eureka, Maven, Git, Angular 7, Jenkins, Lombok, Oracle
  • Full-stack Developer and Consultant

    2017 - 2019
    • Re-implemented part of the system consuming hundreds of thousands of Tweets, using Twitter PowerTrack API as a member of the team that built the Nielsen Social platform.
    • Optimized queries for fetching Nielsen Social reports.
    • Added exciting, new features to the platform.
    • Worked directly with the client based in New York and Chicago.
    • Involved in the development of internal tools.
    Technologies: React, Redux, Ruby on Rails, Sidekiq, Java, Chef, Jenkins, Docker, Hive, MySQL, PostgreSQL, AWS EMR, RDS, EC2, S3, Lambda, Athena, Twitter PowerTrack API, Facebook and Instagram Graph API
  • Full-stack Developer

    2015 - 2017
    • Oversaw the development, client consultancy, analysis, problem-solving, testing, and deployment.
    • Built a management system for Westshore Terminals with the development team–the busiest coal export terminal in North America.
    • Facilitated excellent cooperation with teams from Toronto and Vancouver.
    Technologies: Java, SpringBoot, MS SQL, JWT, Git, Jenkins, SonarQube, JUnit, Mockito, Angular 2, TypeScript, HTML, CSS
  • Software Engineer

    2015 - 2015
    Enterprise Software Group: UBS
    • Worked on the project for six months in the UBS Switzerland headquarters.
    • Developed a UBS internal application for client advisors.
    • Participated in some internal products development, such as the mobile Ionic application.
    Technologies: Java, Spring, Hibernate, JSP, JavaScript, jQuery, AJAX, Maven, Apache Tomcat, AngularJS
  • Java Developer

    2014 - 2015
    • Developed the Oracle product, Taleo application.
    • Implemented a framework for new methods of authentication, such as the use of 3rd-party applications accounts.
    • Added a variety of new features to the platform.
    Technologies: Java, Spring, JavaScript, jQuery, JUnit, Mockito, Git, Maven, Apache Tomcat


  • Toptal Platform (Development)

    As a part of the Toptal core platform team, I took part in the permissions framework migration project working closely with Toptal project managers and the development teams.

  • HSBC Internal System (Development)

    An internal HSBC application, consisting of multiple microservices, that aggregates trader data.

  • Nielsen Social (Development)

    A big data analytics platform for Nielsen Social. A really complex, low latency system that continuously captures and aggregates hundreds of thousands of TV-related social content using Twitter, Facebook, and Instagram APIs.

  • Retrotool (Development)

    An internal u2i project for performing remote retrospectives.

  • Westshore Terminals (Development)

    A management system for Westshore Terminals–the busiest coal export terminal in North America.

  • UBS Internal System (Development)

    An internal application for UBS client advisors.

  • Oracle Product: Taleo (Development)

    Oracle's fully integrated talent acquisition solution includes recruitment marketing and employee referrals to source talent, provide end-to-end recruiting automation, and streamline employee onboarding.


  • Languages

    Java, Java 8, Ruby, JavaScript, Bash, HTML, CSS, SQL, HTML5
  • Frameworks

    Redux, Spring Boot, Swagger, Ruby on Rails (RoR), JSON Web Tokens (JWT), Mockito, JUnit, Bootstrap 4, Spring Security, Factory Girl, Hibernate, Angular
  • Libraries/APIs

    React, REST APIs, Lombok, React Redux, Facebook API, Instagram API, Twitter API, Sidekiq, jQuery, Rollbar, CanCanCan
  • Tools

    Git, Git Flow, GitHub, Redux Thunk, AWS Athena, JetBrains, Slack, Jenkins, Chef, Maven, Postman, Jira, Trello, RSpec, SonarQube, AWS CloudWatch, AWS CLI, Terraform
  • Paradigms

    REST, Agile, Clean Code, Agile Software Development, REST API Architecture, Scrum, Functional Programming
  • Other

    Software Development, IT Consulting, Full-stack, APIs, RESTful APIs, Agile Sprints, Interviewing, Analysis, Software Design, Minimum Viable Product (MVP), Sprint Planning, Enterprise, Project Lombok, Startups, Front-end, Enzyme, Semantic UI, API Documentation, AWS
  • Platforms

    MacOS, AWS EC2, AWS Lambda, Docker, PagerDuty, Amazon Web Services (AWS)
  • Storage

    MySQL, PostgreSQL, AWS S3, Apache Hive


  • Bachelor of Engineering degree in Computer Science
    2011 - 2015
    AGH University of Science and Technology - Cracow, Poland

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