Jakub Zieliński

Experienced Software Developer with a robust background in developing and testing web applications. Proficient in modern frameworks such as React and experienced in creating efficient and scalable solutions for both internal and customer-facing products.

Work Experience + Education

Grand Parade

Software Developer

2022 - Present

As a Software Developer in the Trading UI team, I develop internal React applications that enable users to efficiently manage sport events. Key achievements include:

  • Enhanced productivity by designing and implementing a keyboard shortcut system, streamlining common workflows
  • Achieved a 20% reduction in initial page loads by optimising request waterfall
  • Improved team efficiency by restructuring GitLab CI pipelines, reducing build times by 15% and increasing stability
  • Played a key role in developing "Build Your Odds" feature for NFL and NBA markets, enabling customers to create custom betting combinations

Intern & Jr Software Developer in Test

2021 - 2022

Starting as an Intern and progressing to a Junior Software Developer in Test, I worked with the payments platform team. My responsibilities included preparing test cases and gathering requirements with the Product Owner, developing API tests in Java, and creating E2E tests using WebdriverIO. I collaborated closely with developers to diagnose issues and identify testing needs.

Aptiv

Intern

2019 - 2020

Developed a Django application to streamline hardware inventory management, enhancing the efficiency of tracking and maintaining hardware assets.

Fast IT

IP Networks Engineer

2019 - 2021

Managed and maintained network infrastructure, including a successful migration from Fortigate 60 to 100 model. Also administered web hosting services, ensuring optimal performance and security.

AGH University of Science and Technology

Absolutorium

2017 - 2021

Studied Information and Communications Technology at Faculty of Computer Science, Electronics and Telecommunications

Certificates

  • ISTQB Certified Tester Foundation Level2023
  • AWS Certified Cloud Practitioner2024