
Lukasz Luczak
Verified Expert in Engineering
React Developer
Warsaw, Poland
Toptal member since September 10, 2021
Lukasz is a seasoned software developer specializing in JavaScript and React, with strong analytical skills and decade-long experience transforming ideas into working software solutions. With a master's degree in computer science, Lukasz has extensive knowledge of programming web and mobile apps' back ends, relational database modeling, REST API design, and agile approaches to delivering value.
Portfolio
Experience
- JavaScript - 10 years
- HTML - 9 years
- CSS - 9 years
- Responsive Web Design (RWD) - 7 years
- React - 6 years
- Node.js - 6 years
- SQL - 5 years
- Redux - 4 years
Availability
Preferred Environment
MacOS
The most amazing...
...project I've developed is a progressive web app for kids and their parents that got 4.67 out of five stars from the first reviewers.
Work Experience
Senior JavaScript and React Developer | Tech Lead
Weblify
- Implemented a dozen applications' front ends on React with Material UI, Redux, React Admin, React Charts, and more.
- Implemented application back ends with Node.js and PostGREST with requirements analysis and relational database modeling.
- Built mobile applications for iOS (Swift) and Android (Kotlin).
- Developed an in-house static site generator to quickly create websites with high scores in page speed tests.
- Carried out pair programming, code reviews, and junior developers' mentoring.
Founder | Web Development Manager
Weblify
- Owned the architecture of every application built for clients.
- Oversaw the introduction of Node.js as a platform for back ends and helped implement it for the first customers.
- Introduced React as a tool for SPAs and implemented web UIs with it.
- Managed team of Ruby and JavaScript developers and provided technical expertise.
Founder | Web Developer
One99
- Designed and led the implementation of a Polish FourSquare-inspired geolocation app.
- Designed and developed the app that allowed to group up customer purchases and obtain bulk-purchase discounts during the reverse auction for suppliers.
- Contributed to creating and executing algorithms for determining the winner of multi-params reverse auctions.
Senior Business Intelligence Consultant | Team Leader
SAP
- Implemented over 20 SAP BI solutions for top Polish enterprises in the fields of finance, controlling, materials management, and sales.
- Created and led the business intelligence consultants' team in SAP Poland, making it one of the most profitable teams in the consulting department.
- Contributed to each project implementation stage: business blueprint, system configuration, ABAP programming, tests cases preparation, and end-user training.
- Won the consultant of the year title for extraordinary performance and customer satisfaction.
- Provided dozens of business intelligence training courses in the SAP Poland training center.
Experience
App for Building Children's Good Habits
https://im2be.com/en/I was the front-end developer who designed and implemented the UI and I also owned database models, REST APIs design, and integration with the back end. Besides the common React applications elements, I implemented PWA features like a web push notification and adjusted the mobile look and feel to resemble a native mobile app.
App for Monitoring IoT Sensors Data
I was the front-end developer responsible for the charting module and the back-end developer (PostGREST and Node.js) that developed APIs for storing and transforming raw data, providing web and mobile apps to clients below the performance estimation of 250ms.
Custom Static Site Generator
I designed and implemented the app in Node.js.
Quiz App
I was the front-end developer who also designed database models used for storing data.
POP Comics Reader
http://www.popcomics.comI was the front-end developer who also helped back-end engineers define the format of the comics' content and the transformation from an ePub format to a POP Comics content structure.
Company Websites
I was the front-end developer who implemented the graphical designers’ visions and took care of the SEO correctness and performance optimization.
Some of my recent works include:
• https://www.apexit.com
• https://www.se16n.com/en/
Education
Master's Degree in Computer Science
Poznan University of Technology - Poznan, Poland
Skills
Libraries/APIs
Node.js, React, React Redux, REST APIs, PostgREST, React Testing Library
Tools
Redux Thunk, JSX, Slack, Knex.js, Rollup, Git, Create React App, Redmine, Jira, Amazon Simple Email Service (SES)
Languages
SQL, JavaScript, HTML, CSS, HTML5
Frameworks
Redux, Express.js, Jest, Material UI
Paradigms
REST, Web App Design, Responsive Web Design (RWD), Scrum, Agile, Functional Programming, Web UX Design, Jamstack
Platforms
MacOS, Docker, AWS Lambda
Storage
JSON, SQLite, PostgreSQL, Databases, Amazon S3 (AWS S3)
Other
IT Services, Responsive Web Apps, Progressive Web Applications (PWAs), Web Notifications, Domain Modeling, SAP Business Intelligence (BI), Team Management, IT Consulting, Web App UX, Web App Testing, APIs, Software Architecture, PWA
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