Maciej Uniejewski
Staff Software Engineer In Payment Team, Cybersource at Visa
Greater Poland Voivodeship
Summary
👤
Senior🎓
Top SchoolMaciej Uniejewski is a Staff Software Engineer with 10 years of experience building Java-based payment systems, currently driving card-present transaction processing at Cybersource (Visa). He combines deep Spring and backend expertise with hands-on delivery from prior roles at Payworks and SNP Poland, where he implemented EDI business processes, PDF/reporting pipelines, and data-driven web features. A Poznań University of Technology graduate with top grades, he is an active Java enthusiast who attends community meetups and pursues machine learning and multiple-criteria decision aiding as personal interests. Known for bridging business-facing requirements with robust server-side implementations, he brings a strong academic foundation and a pragmatic approach to complex payment workflows.
10 years of coding experience
6 years of employment as a software developer
Bachelor’s Degree, Computer Science, 4.72 / 5 (grade A), Bachelor’s Degree, Computer Science, 4.72 / 5 (grade A) at Poznan University of TechnologyHigh School, IKA - Computer Academic Class, High School, IKA - Computer Academic Class at High School number 8 in Poznań
Polish, English, German
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (14)
mastercard8
emv8
java7
prometheus-exporter7
visa7
prometheus5
js4
encoding4
uuid-generator2
guid2
uuid1
matrix1
nanoid1
kotlin1
Programming languages (3)
Github contributions (5)
maciej7777/PrometheeDiviz
Sep 2016 - Sep 2018
Contributions:254 commits, 10 PRs, 231 pushes in 1 year 11 months
prometheus-exporterprometheeprometheus
maciej7777/AdventOfCode
Dec 2022 - Jan 2023
Solutions for Advent of Code tasks
Contributions:35 reviews, 98 commits, 327 PRs in 1 month
javajsadvent-of-code-2022advent-of-code-2023advent-of-code-2024
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.