You will get an amazing React extension for HubSpot CRM
Top Rated
Project details
Do you want to take your HubSpot CRM capabilities to the next level? As an expert in React development, I specialize in crafting tailored extensions that streamline your CRM processes, enhance user experience, and unlock new functionalities within HubSpot's powerful ecosystem.
Key Services:
• Custom React Components: I create intuitive and performant user interfaces that integrate flawlessly with HubSpot, enabling your team to work smarter and faster.
• API Integration & Development: Leveraging the HubSpot API, I ensure seamless data flow and actions within the CRM, from automating tasks to synchronizing with other systems.
• Secure Authentication: Full OAuth 2.0 implementations for public apps or API key usage for internal ones, adhering to best practices in security and data privacy.
• Scalable Architecture: My solutions are built to scale, ensuring that as your business grows, your CRM infrastructure grows with it.
• Responsive Support & Maintenance: I offer ongoing support and updates, keeping your custom extensions ahead of the curve and functioning perfectly.
Key Services:
• Custom React Components: I create intuitive and performant user interfaces that integrate flawlessly with HubSpot, enabling your team to work smarter and faster.
• API Integration & Development: Leveraging the HubSpot API, I ensure seamless data flow and actions within the CRM, from automating tasks to synchronizing with other systems.
• Secure Authentication: Full OAuth 2.0 implementations for public apps or API key usage for internal ones, adhering to best practices in security and data privacy.
• Scalable Architecture: My solutions are built to scale, ensuring that as your business grows, your CRM infrastructure grows with it.
• Responsive Support & Maintenance: I offer ongoing support and updates, keeping your custom extensions ahead of the curve and functioning perfectly.
Programming Languages
HTML & CSS, JavaScript, TypeScriptWhat's included $3,200
These options are included with the project scope.
$3,200
- Delivery Time 14 days
- Number of Revisions 1
- Design Customization
- Responsive Design
- Source Code
Frequently asked questions
135 reviews
(125)
(10)
(0)
(0)
(0)
This project doesn't have any reviews.
AS
Andy S.
Mar 23, 2026
Automated VERI*FACTU Reporting Integration with Agencia Tributaria
I've been really impressed with Filip's communication and attention to detail throughout the whole project, I would 100% work with him again.
JH
John H.
Nov 14, 2025
API Integration & Automation for Member Communication
WP
Waterpolo P.
Mar 17, 2025
Full Stack Developer for a HubSpot UI Extension
Filip did an excellent job developing a deal summary UI extension in React. He was proactive, collaborative, and ensured the extension was both functional and secure. His attention to detail and commitment to quality made the process smooth and efficient. Highly recommend!
AR
Aurio R.
Feb 17, 2025
Desenvolvedor Full-Stack para criar um site para conhecer pessoas
We couldn’t be happier working with Filip. He is highly professional, incredibly friendly, and a pleasure to collaborate with. He didn’t just complete the tasks we assigned him - he truly engaged with the project, offering his insights and perspectives with the sole aim of helping it grow. The MVP he delivered was not only solid and well-executed but also a testament to his ability to manage the entire project efficiently. From planning to execution, he ensured everything was aligned with our goals, all while providing exceptional value for money. There’s still much work ahead, and we’re looking forward to continuing this collaboration. A full-stack developer we highly recommend. Thank you, Filip
WP
Waterpolo P.
Sep 26, 2024
React App for an Amateur Waterpolo Team in Barcelona
Great experience working with Filip on the Waterpolo Team E-Commerce React App project. He demonstrated strong expertise in React.js, Node.js, Express, MongoDB, and Stripe integration. Communication was clear, he really gets UX/UI and all tasks were completed efficiently. I highly recommend him for future projects!
About Filip
Full Stack Developer (MERN) | Hubspot Expert | RevOps Expert
100%
Job Success
Barcelona, Spain - 7:10 am local time
Right now I'm the builder behind a healthcare startup I'm developing, where I own the entire stack end to end:
- Front end: React / Next.js web app
- Back end: Node + NestJS, RESTful APIs, MongoDB, OAuth2 auth, Socket IO realtime chat
- Mobile: native iOS app (SwiftUI) talking to the same API
- Integrations: HubSpot CRM, third-party insurance-eligibility verification, and AI-assisted support features
That range is the point: I can ship a feature and the HubSpot automation, attribution, and lead flow behind it - without three separate hires and a translation layer between marketing and engineering.
What I do for clients:
- MERN application development - React, Node, Express/NestJS, MongoDB, RESTful APIs
- Backend systems, third-party API integrations, and deployment
- Native iOS (SwiftUI) clients on top of existing APIs
- HubSpot implementation, automation, pipelines, reporting, and attribution
- Demand generation: funnels, paid acquisition, lifecycle email
I work Agile/Scrum and collaborate over GitHub. Top 1% on Upwork, 14 years on the platform, 3,000+ hours delivered.
Open to equity / cofounder roles - I bring real commercial experience and the ability to build the thing.
Tell me about your goals and I'll map the most direct path there. I won't shoehorn a solution just to close a deal.
Steps for completing your project
After purchasing the project, send requirements so Filip can start the project.
Delivery time starts when Filip receives requirements from you.
Filip works on your project following the steps below.
Revisions may occur after the delivery date.
Initial Scoping
Development