Luka PatarčićLuka Patarčić
Available for full-time hire
55 - €65
per hour

Luka Patarčić

React/Node.js Developer

5+ years of experience
Luka Patarčić FatCat

Part of FatCat Coders since:
October 2022

Luka is a technical leader with over 5 years of experience in web and mobile development and architecture design. The core of Luka’s tech stack encompasses technologies such as React.js, React Native, Node.js, Next.js, as well as Tailwind, Elasticsearch, AWS, Docker, and other related JavaScript technologies. Luka’s mentorship and leadership skills have enabled him to successfully lead teams in developing challenging SaaS products, complex webpages, and mobile applications.

Technical leadershipMentoringArchitecture DesignWeb&Mobile DevelopmentReact.jsReact NativeNode.jsGatsbyNext.jsNest.jsJavaScriptTypeScriptStyled ComponentsJamStackTailwindMolecular.jsHeadless CMSPostgreSQLMySQLMongoDBElasticSearchRedisContentfulStrapiAWSDockerGoogle Maps

FatCat Work Experience

Calendly (Marketing Website)

September 2023 - December 2023

  • Calendly leads the way in automated meeting scheduling, offering team-based scheduling solutions and integrations with advanced security features.
  • Led a team of two FatCat Coders developers for Calendly's Marketing Website (
  • Conducted thorough research and gathered insights to develop prototype solutions, which were presented to the Calendly team.
  • Utilized the findings from the research to determine the optimal framework and CI/CD deployment for the main webpage, from research and presentation to development and release.
  • Collaborated closely with the Calendly marketing team to implement ideas, including transitioning the website from Gatsby to Next.js and supporting the overall transition process.
  • Demonstrated effective communication and consistently met project deadlines.
Main tech stack

Calendly (product)

June 2023 - September 2023

  • Calendly leads the way in automated meeting scheduling, offering team-based scheduling solutions and integrations with advanced security features.
  • Worked on the back-office/admin panel (namely ‘Active Admin‘;) initially written in Ruby on Rails, where he implemented tables, user database printing, and user information.
  • Added extra features for migrating users from one organization (company) to another.
  • Contributed to the main Calendly application by introducing features related to user migration, listing migrated users, displaying their current status, and implementing an email-sending feature, as well as facilitating import and export of 'event types' on Calendly.
  • Collaborated directly with the in-house Calendly team consisting of 3 developers, 1 QA, 1 PM, and 1 Designer, following the scrum methodology.
  • Maintained regular communication with the international Calendly team across different time zones.
Main tech stack
ReactRuby on RailsPostgreSQLJavaScriptRedux
Testimonial stars
“I appreciate the dedication and expertise that Luka brought to our project. His thorough research and commitment to identifying and implementing the most effective solutions to our challenges truly exceeded our expectations.”

Project Manager @Calendly


December 2022 - April 2023

  • Insightful is a team-automated tracking tool designed to monitor app and website usage, capture screenshots, and track activity in real-time for improved performance.
  • Contributed to the implementation of microservices and the development of new integrations with prominent tools such as Jira and Slack.
  • Successfully implemented automatic time mapping and project/task creation based on predefined rules.
  • Developed a feature for normalizing application names in the product to ensure seamless usage of the app.
  • Enhanced features through both independent work and collaborative efforts with the Insightful team, consisting of 1 team lead, 1 frontend developer, 1 QA, 1 Designer, and 1 Product Owner.
Main tech stack
Testimonial stars
“Luka is highly professional, and organized, and takes full responsibility for his work.”

CEO @Insightful

Fox Vision

October 2022 - December 2022

  • Fox Vision is an advertising company specializing in the food industry, specifically tailored for tablet displays to address the advertising needs of food delivery companies.
  • Developed tracking via Google Maps to follow the location of the table display, implemented SMS & Email verification for the app, and introduced a feature for real-time communication between mobile and tablet.
  • Led a team of four (4) full-stack FatCat developers, overseeing tasks such as conducting code reviews, facilitating brainstorming sessions, and actively contributing to the development process.
  • Contributed as a member of the Fox Vision scrum team, which included 1 PM, 1 Designer, and 1 QA.
  • Improved and refactored the codebase to ensure enhanced performance and maintainability.
  • Successfully delivered a Minimum Viable Product (MVP), enabling the client to pursue investment opportunities and effectively present their innovative idea.
Main tech stack
ReactPostgreSQLAWSReact NativeNest.jsTypeScript
Testimonial stars
“Luka has a great work ethic and is always positive and motivated. I am impressed with his understanding of the FoxVision project requirements and his ability to translate them into technical solutions. He is a valuable asset to the team.”

CEO @FoxVision

Other work experience


September 2020 - September 2022

  • Developed multiple banking applications utilizing .NET backend and Next.js frontend on AWS infrastructure, incorporating microservices for authentication, logging, and data importing.
  • Contributed to an e-commerce platform hosted on AWS, integrating .NET and Next.js with Stripe for payments, and implementing various enhancements such as keyword extraction and image manipulation. Led a team throughout the project.
  • Participated in the development of a Flutter mobile app leveraging Firebase and OpenStreetMap for landfill information, as well as a Due Diligence platform featuring React frontend, Node.js backend, and MongoDB database.
  • Typically collaborated within a scrum team consisting of 1 PM, 1–2 FullStack developers, 1 Designer, and 1 QA. Also led a team during certain projects.
Main tech stack
Next.js.NETFlutterFirebaseReact with ReduxNode.js with ExpressMongoDBAWSStripe IntegrationGoogleMaps

Independent contractor

October 2018 - September 2022

  • Independently developed full-stack applications for small businesses using Symfony (PHP) and MSSQL for the backend, and Twig and vanilla JavaScript for the frontend. Utilized Doctrine as the primary ORM and AWS SES for email sending.
  • Created a coffee shop management application with a simple admin back office built with Material UI and a scheduling system with a calendar synchronized with another web application.
  • Developed a website for an English language school from the ground up, incorporating SEO features and analytics. Implemented a headless CMS using JavaScript to manage content effectively.
Main tech stack
Symfony (PHP)MSSQLTwigJavaScriptDoctrineAWS SES


  • Master's Degree in Information TechnologySubotica Tech - College of Applied Sciences
  • Bachelor of Applied Science, Computer ProgrammingSubotica Tech - College of Applied Sciences


  • English
  • Serbian


  • Sports (basketball, tennis, running)
  • Learning Spanish
  • Reading books
  • Board games
Luka Patarčić
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