Кирило

Kyrylo Synelnyk (Front-end developer)

Technical skills
Front-end:
 JavaScript (OOP, functional programming, design patterns, ES6+)
 Frameworks/Libraries: React.js, TypeScript, Material-UI, Jotai, Redux Toolkit Query
(RTK Query), Axios, Next.js, jQuery, Yii (1/2), Redux State manager (Basic
knowledge), Webpack (Basic knowledge), React Testing Library (Basic knowledge)
 API & Testing: Postman, Docker, PageSpeed/Lighthouse
 Databases: MySQL (MySQL Workbench)
 Performance Optimization: Lazy loading, code splitting, React hooks for enhanced
web performance

Markup & Styling:
 HTML5, CSS3, SASS/SCSS, Bootstrap (v3-v5), Tailwind CSS
 Pixel-perfect, responsive, and adaptive web development
 Accessibility: Ensuring WCAG compliance and ARIA attributes for inclusive web
applications

Other skills:
 Version control: Git (+Bitbucket)
 Task trackers: Jira
 Design tools: Adobe Photoshop
 Collaboration: Worked closely with design, product, marketing, and QA teams to align
UI/UX with business goals
 Project management: Experience working with Scrum, Agile, and Kanban
methodologies
 Software Design Principles: SOLID, OOP, Design Patterns
 Architecture: REST, Client/Server Architecture
Previous experience
Front-end Developer | Digicode
May 2021 – Present (4 years 4 month)

Technologies:
JavaScript (ES6+), React.js, TypeScript, Redux Toolkit Query (RTK Query), Axios, Jotai,
Material-UI, PHP (Yii 1), jQuery, Bootstrap, HTML5, CSS3, SCSS, Docker, Postman, Jira,
Git (+Bitbucket), React Router.

Responsibilities/Achievements:
 Led the migration from a Yii-based PHP front end to a React-driven UI, enhancing
performance, maintainability, and user experience.
 Implemented lazy loading of React components to improve initial load time,
enhancing performance by loading only the required content as users interact with
the application, reducing page load times and improving user experience.
  Developed high-quality, accessible, and performant UI components with React,
ensuring seamless cross-device compatibility.
 Ensured cross-browser compatibility through responsive, adaptive design, optimizing
the user experience on all major devices.
 Contributed to front-end platform infrastructure to enhance scalability and optimize
developer workflows.
 Integrated and tested APIs with React applications, using Postman for validation to
ensure functionality.
 Conducted daily standups and collaborated in Agile workflows using Jira, managing
code through Bitbucket and participating in code reviews.
 Focused on user-centric UI/UX design, working closely with design teams to
implement consistent design patterns.

Front-end Developer | Intellica Group
May 2018 – May 2021 (3 years 1 months)

Technologies:
JavaScript, jQuery, Bootstrap, PHP (Yii 2), HTML5, CSS3, SCSS, PHP, MySQL, Docker,
Postman, Git.

Responsibilities/Achievements:
 Developed and updated website modules, added new features and ensured smooth
functionality using PHP, JavaScript, and Bootstrap.
 Collaborated with cross-functional departments to implement and refine features,
ensuring technical feasibility of UI/UX designs.
 Actively participated in code reviews and daily stand-ups, contributing to team
coordination, problem-solving, and coding best practices.
 Managed database changes and ran deployment scripts to ensure smooth updates to
the system.
 Utilized and maintained a local development environment using Docker for consistent
workflow across the team.
 Utilized Postman to test API updates, ensuring successful integration with front-end
systems.
 Built interactive features using JavaScript, jQuery, and PHP for dynamic content and
improved performance.
 Integrated front-end components with backend APIs for seamless data exchange.

Front-end Developer | Freelance
Oct 2017 – Feb 2019 (1 year 5 month)

Technologies:
HTML, CSS, Bootstrap, WordPress, JavaScript, Adobe Photoshop

Responsibilities/Achievements:
 Developed and optimized websites from scratch using PSD layouts, implementing
 front-end style guides, and ensuring maximum speed, scalability, and SEO
 Built responsive websites with HTML, CSS, JavaScript, and WordPress, ensuring
cross-browser compatibility and smooth user experience.
 Managed website hosting, including uploading websites to servers and requesting
and activating SSL certificates.
 Set up and maintained a local development environment using Docker for consistent
workflow across the team.
 Troubleshot and resolved technical issues to enhance the overall website
performance

Education
Master’s degree in Economics | Kyiv National University of Trade and Economics
2013 – 2018

Additional courses
CyberBionic Systematics – jQuery Programming
Aug 2017

Danco educational center – JavaScript Programming
Jul 2017

Prog.kiev.ua – Front-end Web Development (HTML5, CSS3)
Feb 2017

BrainBasket Foundation – Foundations of Programming (CS50 course)
Sep 2016

Languages
English - upper-intermediate
German - pre-intermediate

About me
I’m a dedicated front-end developer with a passion for cycling, tennis and board games.
I enjoy connecting with new people, learning from diverse perspectives, and consistently
striving for both professional and personal growth.

Contacts
Telegram: t.me/kirillsinelnik
Cell Phone: [open contact info](look above in the "contact info" section)
Email: [open contact info](look above in the "contact info" section)
LinkedIn: [open contact info](look above in the "contact info" section)