Available for Projects

Senior React Frontend Engineer — Specialist in Premium Dashboards & Data-Driven Interfaces

I build enterprise-grade dashboards, real-time interfaces, and scalable UI architectures for SaaS, AI platforms, and data-heavy products.

6+
Years Experience
Multiple
Dashboards Built
100%
Client Satisfaction
Profile
Available for projects
About Me

Turning Complex Data Into Elegant Experiences

I'm a Senior Frontend Engineer with 6+ years of experience building premium dashboards, advanced data visualization systems, and scalable React architectures. I help companies turn complex data into intuitive, elegant user experiences.

My work focuses on the intersection of data, design, and performance — creating interfaces that not only look beautiful but handle massive datasets with ease.

Specialized in Data-Heavy UIs & Dashboards

Expert in building multi-chart analytics, comparison views, and real-time data interfaces

Strong Architectural Decision-Making

Component systems, state management patterns, and scalable frontend foundations

Experienced with SaaS, Energy Tech, AI, and Healthcare

Deep domain knowledge across multiple industries and product types

Services

Premium Frontend Engineering Services

Specialized expertise in building enterprise-grade dashboards and data-rich interfaces

Enterprise Dashboards & Data Visualization

  • Multi-chart layouts
  • Trend analysis modules
  • Real-time KPIs
  • Chart.js and custom components

Complex Tables & Workflow Interfaces

  • Sorting, filtering, pagination
  • Dynamic columns
  • High-performance rendering
  • Mantine UI, Ant Design, or custom solutions

Audio Insights & Review Tools

  • Audio players (Wavesurfer.js)
  • Transcript and annotation UIs
  • High-volume session review
  • Real-time playback controls

Scalable Frontend Architecture

  • Component systems
  • React Query data layer design
  • Testing foundations
  • High-performance UI patterns
Case Studies

Dashboard Projects That Scale

Real-world enterprise dashboards built for leading SaaS, AI, and healthcare companies

StepwiseEnergy SaaS

Multi-Dashboard Analytics Platform

Built comprehensive analytics dashboards with Chart.js visualizations, comparison pages, PDF export system, and advanced tables featuring filters, attachments, and activity logs.

  • Multiple analytics dashboards with real-time data
  • Comparison pages for period-over-period analysis
  • Chart.js integration for custom visualizations
  • PDF export using paged.js
  • Advanced tables with sorting, filtering, attachments, and logs

Energy Performance Dashboard

Comparison Analysis

Total Energy
1,248 kWh
-12% vs last period
Cost Savings
$3,420
+8% improvement
Efficiency
94.2%
+2.1% increase
PythiaAI Recommendations Platform

Audio Waveform & Review Dashboard

Created sophisticated audio review interfaces with waveform visualization, transcript tools, and high-volume workflow management for AI-driven recommendations.

  • Audio waveform dashboards with Wavesurfer.js
  • Transcript review and annotation tools
  • Store and device management interfaces
  • High-volume audio session handling
  • Real-time playback and analysis controls

Audio Review Dashboard

Session #A4729

1:24 / 3:47AI Confidence: 94%
0:12
Hello, I'd like to schedule an appointment...
0:28
Of course! What time works best for you?
ViewlyMarketplace Platform

Scheduling & Activity Dashboards

Designed clean, intuitive dashboards for scheduling and activity tracking, custom audio player components, and integrated analytics stack with GTM, GA, Hotjar, and Cookiebot.

  • Scheduling and activity dashboards
  • Custom audio-introduction player
  • Clean Mantine UI design system
  • Landing page with conversion optimization
  • Analytics stack: GTM, GA, Hotjar, Cookiebot

Scheduling Dashboard

January 2026

Total Bookings
124
+12% this month
Active Sessions
18
In progress today
Providers Online
42
Available now
January 2026
Upcoming Sessions
Sarah Johnson
Today
Initial Consultation • 60 min
2:00 PM - 3:00 PM
Michael Chen
Tomorrow
Follow-up Session • 30 min
10:00 AM - 10:30 AM
CernerEnterprise Healthcare

UI Modernization & Accessibility

Led enterprise-scale UI revamps focusing on responsive design, accessibility enhancements, SCSS to JSS migration, and code quality improvements with comprehensive testing.

  • Large-scale UI modernization projects
  • Responsive UI system implementation
  • WCAG accessibility enhancements
  • Code quality improvements with Jest and SonarQube

Healthcare Portal

Patient Management System

WCAG AA Compliant
Patient ID
Name
Status
Last Visit
PT-1042
John Anderson
Active
2 days ago
PT-1043
Sarah Mitchell
Scheduled
1 week ago
PT-1044
Michael Chen
Active
Today
Total Patients
2,847
Active Cases
124
Scheduled
48
Technical Skills

Enterprise-Grade Technology Stack

Battle-tested tools and frameworks for building premium dashboards at scale that I usually work with.

Core Stack

React
TypeScript
React Query
JavaScript
React Hook Form

UI & Visualization

Tailwind CSS
Mantine UI
Ant Design
Chart.js
Wavesurfer.js
CSS3

Build & Quality

Vite
Webpack
Jest
React testing library
Storybook
ESLint
Prettier
Get In Touch

Need a Premium Dashboard? Let's Build It.

Whether you're building a new product or modernizing an existing platform, I can help transform your data into elegant, high-performance interfaces.

Email
stefanmares.contact@gmail.com
Typical Response Time
Within 24 hours
Project Types
Dashboards, Data Viz, Frontend Architecture

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© 2026 Ștefan Mareș. All rights reserved.
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