Summary
Overview
Work History
Education
Skills
Work Preference
Languages
Work Availability
Timeline
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Łukasz Oleniuk

Łukasz Oleniuk

Sokołów,Bolimów

Summary

Frontend development professional with strong +15y focus on creating impactful user experiences. Skilled in HTML, CSS, JavaScript, and modern frameworks such as React and Angular. Known for team collaboration, adaptability, and achieving results in fast-paced environments. Reliable and flexible, consistently delivering projects that meet and exceed expectations.

Overview

20
20
years of professional experience

Work History

Senior Front End Developer

Payair
10.2022 - 10.2024
  • SDK Development for Payment Processing: Developed robust JavaScript Software Development Kit libraries to support multiple payment options, including Visa, Mastercard, ApplePay, GooglePay, and SamsungPay. Ensured high reliability and security by adhering to industry best practices for handling sensitive payment data.
  • Project Migration to monolith Structure: Successfully led migration of a complex, multi-service project (around 50 independent packages) to a monolith repository structure. This change reduced maintenance costs and simplified version control, enabling more efficient code management and faster integration across teams.
  • Mobile Payment Feature Development: Designed and implemented new features for mobile payment integration, enhancing user experience and expanding platform's functionality to reach more users.
  • UI Component Creation for Embedded Payments: Built a comprehensive UI component library for embedded payment solutions, allowing for seamless user interactions and a consistent, intuitive design across different devices and platforms.
  • Documentation and Architecture Planning: Played a key role in planning project architecture and creating detailed documentation to support future development and ease on boarding for new team members.

Senior Developer

Fujitsu
05.2015 - 10.2022
  • Frontend Development for CS8000 Project: Developed new features for CS8000 web interface, key system for hardware management, providing users with enhanced, more interactive experience.
  • Big Data Table Rendering Library: Engineered a JavaScript library from scratch to handle large datasets, achieving a render time of 1.2 seconds for 10 million records. This tool greatly improved data visualization performance and was integrated into various internal applications.
  • Proof of Concept for Cloud Storage Simulation: Designed and implemented backend library in C as proof of concept for emulating cloud storage file systems. This innovation provided efficient solution for data storage and retrieval, enabling rapid access to large volumes of data.
  • Custom Proxy Tool for Feature Testing: Created custom proxy tool that facilitated frontend-backend communication for development purposes, allowing team to emulate new features before their backend counterparts were fully implemented.
  • Internal Employee Management Tool: Developed an internal tool to manage employee data and streamline HR processes. This tool improved accuracy in data handling and reduced administrative overhead.
  • Jenkins CI Integration: Contributed to team’s CI/CD efforts by implementing Jenkins pipelines, automating testing, and deployment workflows. This significantly reduced time required to deploy new features and minimized errors in production.

Senior Software Developer / Architect

Raiffeisen / Raiffeisen Polbank
01.2012 - 05.2015
  • Customer Service Software Development: Designed and implemented internal customer service software, enhancing the customer support experience with streamlined processes. Great focus on performance processed data for loan decisions in less than 10 seconds.
  • Data Migration and Warehouse Expansion: Led data migration efforts and collaborated with IBM to expand the data warehouse, facilitating improved data storage, retrieval, and analytics.
  • API Integration: Developed connections with external APIs to assess customer creditworthiness, allowing for real-time credit evaluations.
  • OCR Tool Development: Created an OCR tool to recognize and process scanned documents attached to loan applications, improving data entry efficiency and reducing processing time.

Education

High School Diploma -

Pomorska Szkoła Informatyki
Szczecin
08.2008

Skills

  • PHP
  • Java
  • JavaScript
  • React
  • REST
  • Typescript
  • CSS
  • Laravel
  • Tailwind CSS
  • Payment gateways
  • CI/CD

Work Preference

Work Type

Full TimePart TimeContract Work

Work Location

Remote

Languages

Polish
Bilingual or Proficient (C2)
English
Upper intermediate (B2)

Work Availability

monday
tuesday
wednesday
thursday
friday
saturday
sunday
morning
afternoon
evening
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Timeline

Senior Front End Developer

Payair
10.2022 - 10.2024

Senior Developer

Fujitsu
05.2015 - 10.2022

Senior Software Developer / Architect

Raiffeisen / Raiffeisen Polbank
01.2012 - 05.2015

High School Diploma -

Pomorska Szkoła Informatyki

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