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$
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I will build interactive charts dashboards and data visualizations in react
Cesar Araujo
About this gig
Got data that needs to make sense visually? I'll turn it into clean, interactive,
and performant charts and dashboards that your users will actually understand.
I recently built a full data visualization layer for an international environmental
intelligence platform integrating 20k+ records into multi-format charts with
dynamic filtering, real-time updates, and export capabilities. I know what it takes
to make data visualization work at scale.
What I can build:
· Interactive dashboards with multiple chart types (line, bar, area, donut, scatter, heatmap)
· Data tables with sorting, filtering, pagination, and custom cell rendering
· Real-time data updates and optimistic UI patterns
· API integration with React Query for efficient data fetching and caching
· Interactive maps with data layers (Mapbox GL)
· Export functionality (CSV, PDF, image)
Libraries I work with:
ApexCharts · Chart.js · AG Grid · React Data Table · Recharts · Mapbox GL · React Query
Built with React or Next.js, TypeScript, and your preferred styling system.
If you have a complex dataset and need it presented clearly let's talk.
Get to know Cesar Araujo
Cesar Araujo
Frontend Developer, Fullstack Capable
- FromVenezuela
- Member sinceJan 2019
- Last delivery1 year
Languages
English, Spanish
Full Stack Engineer with 4+ years building production web applications. I own the complete development cycle: frontend, backend, database design, infrastructure, and testing.
I write clean, maintainable code and communicate clearly throughout the project. I don't disappear after delivery.
Core stack: Next.js · React · TypeScript · NestJS · Prisma · PostgreSQL · TailwindCSS · Playwright · AWS · Supabase
cesararaujo.dev
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FAQ
What information do I need to provide to get started?
I'll need to know what data you're working with (structure, volume, and source), what type of visualizations you have in mind, and how the data will be delivered — static file (JSON, CSV) or via API. If you already have a design or reference, that helps too.
Can you connect the charts to my existing API or backend?
Yes. I work with REST and GraphQL APIs using React Query, including caching, background refetching, and loading/error states. If you have an existing backend, I just need the endpoint documentation or a sample response.
What if I don't know which chart type is best for my data?
That's part of what I bring to the project. Once I understand your data and what decisions your users need to make from it, I'll recommend the right chart types. Good data visualization is about clarity, not just aesthetics.
Do the charts work on mobile?
Yes, all deliveries are fully responsive. Charts adapt to screen size and remain readable and interactive on mobile and tablet.
Can I request changes after delivery?
Yes. Every package includes one revision round. If you need additional changes beyond that, we can discuss it depending on the scope.
