SaaS Billing Portal Redesign
Karina delivered clean, reliable code and improved the checkout flow quickly. Communication was excellent throughout. 5 stars.
Hourly Rate
$33 / Hr
Total Earned
$28,525
Experience
9 Years
Skills
- JavaScript
- TypeScript
- React
- Node.js
- Python
- REST APIs
- PostgreSQL
- AWS
Senior Full Stack Developer
I am Karina Ivanovna, a full stack developer with over 8 years of experience building modern web applications and backend systems. I specialize in designing scalable, secure, and maintainable solutions for startups, agencies, and enterprise teams. My work spans frontend development, API design, database architecture, cloud deployment, and performance optimization. I focus on clear communication, clean code, and delivering products that align with business goals. I am comfortable working independently or collaborating with cross-functional teams in agile environments.
Reviews
31 reviews on file.
E-commerce Inventory Sync Platform
Great work integrating our store with suppliers. Karina solved edge cases we had missed and shipped on time. Highly recommended.
Mobile Fitness App Backend
Karina built a stable API with thoughtful documentation. The app launch went smoothly thanks to her careful work.
CRM Automation Workflow Upgrade
She understood our sales process fast and automated repetitive tasks perfectly. Professional, responsive, and detail-oriented.
Executive Analytics Dashboard Build
Karina created a fast dashboard with clear metrics and polished UX. Stakeholders loved the result.
AI Support Chatbot Integration
Excellent implementation of the chatbot and knowledge base sync. Karina tested thoroughly and explained everything clearly.
Fintech KYC Verification Module
Karina handled sensitive compliance requirements with care. The module is secure, fast, and easy for our team to maintain.
Healthcare Appointment Scheduling System
She delivered a dependable booking flow for clinics and patients. Great communication and strong problem-solving from start to finish.
Marketplace Vendor Onboarding Portal
Karina streamlined our vendor registration process beautifully. The code quality was excellent and deployment was painless.
Hotel Booking Engine Optimization
Our booking pages are much faster now. Karina identified bottlenecks quickly and delivered measurable improvements.
Social Community App Features
Karina added notifications, profiles, and moderation tools with great attention to detail. Smooth collaboration and timely delivery.
IoT Device Monitoring Dashboard
She built a real-time dashboard that is stable and easy to use. Karina was proactive and handled technical challenges well.
Retail Analytics Data Pipeline
Karina designed a clean pipeline that reduced manual reporting hours. Reliable delivery and very clear status updates.
Real Estate Listing Platform
The platform is fast, searchable, and easy for agents to manage. Karina exceeded expectations with architecture and execution.
Learning Management System Migration
Karina migrated our LMS with no data loss and minimal downtime. She planned carefully and communicated every step.
Restaurant Ordering Web App
Great developer with strong product instincts. Karina built a simple, dependable ordering system our staff could use immediately.
Logistics Route Planning Tool
Karina delivered a smart routing interface that saved dispatch time. Excellent testing, documentation, and support.
Cybersecurity Audit Reporting Portal
She created a secure portal with clear reports and role-based access. Very professional and precise work.
HR Onboarding Automation Suite
Karina automated forms, approvals, and reminders flawlessly. The project was delivered ahead of schedule.
Subscription Video Streaming Platform
The streaming experience is smooth and the subscription logic works perfectly. Karina was responsive and technically strong.
Travel Itinerary Mobile Prototype
Karina turned our concept into a polished prototype quickly. Great UX suggestions and clean implementation.
Legal Document Management System
She built secure document workflows with excellent search and permissions. Our team appreciated her clarity and reliability.
Manufacturing Quality Control Dashboard
Karina delivered a practical dashboard for tracking defects and production KPIs. Fast, accurate, and easy to maintain.
Nonprofit Donation Platform Upgrade
Our donation flow is simpler and conversions improved. Karina was thoughtful, patient, and very efficient.
Blockchain Wallet Admin Console
Karina built a secure admin console with clean audit trails. She communicated risks clearly and delivered solid code.
Telemedicine Patient Portal Integration
Excellent work connecting patient records, appointments, and messaging. Karina delivered a secure and user-friendly solution.
Marketing Campaign Automation Dashboard
She built a dashboard that made campaign tracking much easier. Karina was organized, quick, and great to work with.
Property Maintenance Request App
Karina created a simple app for tenants and managers that works reliably. Great attention to workflow details.
Food Delivery Partner API
The API integration was clean and well documented. Karina handled third-party issues calmly and kept the project moving.
Recruitment Matching AI Tool
Karina built an effective matching tool with clear scoring and review screens. Strong technical judgment and great communication.
Cloud Deployment Cost Optimization
She reduced our cloud spend while improving performance. Karina provided clear recommendations and implemented them safely.