Dejan VelimirovićDejan Velimirović
Available for part-time hire
per hour

Dejan Velimirović

Full-Stack Developer

19+ years of experience
Dejan Velimirović FatCat

Part of FatCat Coders since:
August 2020

Dejan is an experienced software architect and engineer specializing in web technologies. With over 19 years of experience, Dejan is an expert in React, React Native, Next.js, Node.js, PostgreSQL, and MySQL. He is also quickly adaptable and versatile in other technologies such as Go, Electron, PHP, Java, and AWS. Besides leading complex software architecture, Dejan has rich product development experience in healthcare, finance, and SaaS solutions, as well as DevOps experience

Software ArchitectureDevOpsProduct DevelopmentJavaScriptTypeScriptReactReduxMobXReact NativeNode.jsNext.jsPHPJava/KotlinGoElectronStripeGatsbyPostgreSQLMySQLContentfulAWSSufficient Self-managing

FatCat Work Experience

Enjoy Good Health

July 2023 - ongoing

  • Clean and pure vitamin supplements specifically designed for people who experience sinus and allergy problems.
  • Led as the responsible Lead Engineer Architect, integrated Contentful CMS to enable flexible and efficient content updates, ensuring up-to-date product information and engaging website content.
  • Enabled secure and convenient monetary transactions through Stripe integration, fostering trust and minimizing checkout friction for customers.
  • Streamlined product additions by leveraging existing APIs and code from the admin panel, reducing development time and resource allocation.
  • Improved product listings and search engine visibility by integrating Google Merchant Center.
  • Established a modular and scalable architecture for future website growth and feature expansion.
  • Meticulously adhered to American data privacy regulations and relevant industry standards, building trust and ensuring legal compliance.
  • Developed a custom user review system to encourage transparent feedback and build trust with potential buyers.
  • Worked within an e-commerce team alongside two additional developers, a product owner, two marketing managers, and a designer, following the Scrum methodology.
Main tech stack

ProvideHealth (Vitamed)

February 2021 - ongoing

  • ProvideHealth is an App created by doctors that offers custom product selections for your health needs.
  • Implemented the Custom Provider Share Medication Recommendation Process with SMS Deep Linking using Twilio, providing personalized product suggestions based on user preferences, resulting in enhanced engagement and conversion rates.
  • Integrated Shippo to streamline shipping workflows, ensuring efficient order fulfillment and reliable, timely product delivery.
  • Improved user satisfaction with a smooth checkout process powered by Stripe for secure and convenient money transfers and subscriptions.
  • Ensured compliance of all integrated features with relevant industry regulations and data privacy laws.
  • Developed a robust admin panel, granting app owners complete control over purchases, metrics, product management (including item creation, classification, and inventory), and other critical operational aspects.
  • Led the development team, showcasing exceptional technical skills to resolve challenges and ensure app functionality and performance.
  • Optimized payment infrastructure for exclusive reach within the United States.
  • Worked within an m-commerce team alongside two additional developers, a product owner, scrum master, and designer, adhering to the Scrum methodology.
Main tech stack
NodeJS (Nest.js)PostgreSQLReactReact NativeAWSStripe


August 2022 - December 2022

  • A customizable widget that helps you get more customers from your current website visitors.
  • Improved the Convertmore service by introducing new features and addressing bugs for a customizable widget designed to convert website visitors into customers.
  • Implemented features including support for Mexican phone numbers, tracking addition, account deletion, phone number spoofing, and analytics integration.
  • Specialized in resolving complex technical challenges as one of the most experienced and reliable engineers on the team.
  • Collaborated with the Convertmore team, including the project manager and QA, to ensure seamless project execution.
Main tech stack

Other work experience


January 2017 - February 2020

Main tech stack
NodeJSPostgreSQLRedisInfluxDBAWSReactReact Native

ShiftPlanning / Humanity

September 2011 - June 2016

Main tech stack


October 2009 - May 2011

Main tech stack


March 2008 - September 2009

Main tech stack

First Beat Media

November 2005 - August 2008

Main tech stack


  • Masaryk University, Faculty of InformaticsBrno, Czech Republic


  • English
  • Serbian
  • Czech


  • With an entrepreneurial spirit Dejan, has turned his passions into a business, which is why he is the owner of the PetShop “Moja Mačkica” and the founder of “DVSoftware”.
Dejan Velimirović
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