Krzysztof Raciniewski
Summary
Resourceful professional with successful track record in developing innovative web designs and features. Possesses solid knowledge of HTML, CSS, JavaScript and Angular with ability to quickly learn new technologies. Demonstrated success in identifying and resolving complex code issues.
Overview
10
10
years of professional experience
Work History
Senior Frontend Developer /Tech Lead
Asseco Poland S.A.
2021.01 - Current
- Led front-end development projects from inception to completion, resulting in successful launches of various web applications.
- Collaborated closely with back-end developers to integrate RESTful API endpoints into front-end architecture seamlessly.
- Managed source code effectively using Git branches, pull request reviews, and merge conflict resolutions.
- Implemented responsive design principles to ensure optimal display on various devices, improving overall usability for users on both desktops and mobile devices.
- Created proofs of concept for innovative new solutions.
- Work closely with UI/UX designers to create a seamless user experience
- Debugged complex software issues, leading to a more stable product release.
- Mentored junior developers, fostering a collaborative learning environment and supporting professional growth.
- Reduced development time by creating reusable code libraries for future projects.
- Collaborated with cross-functional teams to ensure seamless integration of new features.
- Task estimation and planning in collaboration with the team
- Working agile in a team of developers, testers, and product owners to deliver high-quality software
Frontend Developer
Asseco Poland S.A.
2019.07 - 2021.01
- Utilized HTML, CSS, and JavaScript to create visually appealing and responsive web pages that met client requirements.
- Worked closely with UX/UI designers to translate their designs into functional web applications.
- Collaborating with the project team
- Designed and updated layouts to meet usability and performance requirements.
- Collaborated with back-end developers to improve website functionality and integrate new features.
- Creating technical and user documentation
- Developed user-friendly web forms with validation and error handling.
Full-stack Developer
Connectis Sp. Z.O.O.
2017.05 - 2019.07
- Development and maintenance of web applications
- Configuring test environments on Linux servers
- Worked with back-end developers to design APIs.
- Reduced page load times by optimizing front-end assets such as JavaScript files, stylesheets, and images.
- Reviewed code, debugged problems, and corrected issues.
- Refactored legacy codebases to modernize software architecture and improve maintainability.
- Troubleshot and resolved complex technical issues, maintaining optimal system performance and uptime.
- Creating and maintaining CI/CD processes
- Ensuring code quality
- Writing unit tests
Full-stack Developer
INTERSON
2016.08 - 2017.03
- Development and maintenance of the CRM system biuro24h.pl
- Development and maintenance of the system centrumhandlowe.pl
- Development and maintenance of internal systems
- Working with PHP using Zend/Symfony/Laravel
- Creating technical documentation
- Maintaining applications on Unix/Linux servers
- Direct contact with clients
- Ensuring code quality
- Recruiting and onboarding new employees
- Developed unit test cases for testing and automation.
Full-stack Developer
Data Invest Sp. Z.O.O.
2015.06 - 2016.07
- Creation, development, and maintenance of web applications
- Designing database structures
- Creating REST APIs
- Development of existing projects (bug fixing, code refactoring, adding new features)
- Writing functional and unit tests (PhpUnit, Karma, Protractor)
- Managing applications on production servers
- Testing web applications for security
- Creating developer and user documentation
- Ensuring code quality
Full-stack Developer
SaaS Systems
2014.08 - 2015.05
- Development and maintenance of CRM software(SugarCRM)
- Development of web applications (Rest API)
- Creation of GUIs for web applications
- Development of native applications for Android OS
- Testing software for security and correctness of implemented features according to client requirements
Education
Master of Science - Computer Science
Nicolaus Copernicus University in Torun
Torun, Poland06.2016
Bachelor of Engineering - Computer Science
Nicolaus Copernicus University in Torun
Torun, Poland01.2015
Skills
- JavaScript/HTML/CSS
- TypeScript
- NodeJS/Nest.js
- PHP
- CSS/SASS/SCSS
- Angular.js/Angular
- Zend/Symfony/Laravel
- Bootstrap/Tailwind/Bulma
- Kendo UI, Nebular, PrimeNG, Material Design
- NRWL NX
- Akita, NGXS, NGRX
- Jasmine/Karma
Languages
Polish
Native language
English
Intermediate
B1
Timeline
Senior Frontend Developer /Tech Lead
Asseco Poland S.A.
2021.01 - Current
Frontend Developer
Asseco Poland S.A.
2019.07 - 2021.01
Full-stack Developer
Connectis Sp. Z.O.O.
2017.05 - 2019.07
Full-stack Developer
INTERSON
2016.08 - 2017.03
Full-stack Developer
Data Invest Sp. Z.O.O.
2015.06 - 2016.07
Full-stack Developer
SaaS Systems
2014.08 - 2015.05
Master of Science - Computer Science
Nicolaus Copernicus University in Torun
Bachelor of Engineering - Computer Science
Nicolaus Copernicus University in Torun
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