Textutor AI Platform
Led technical architecture for AI-powered essay correction and grading system at GoGymi
Description:
Led technical architecture for Textutor AI Platform at GoGymi - a comprehensive AI-powered essay correction and grading system revolutionizing language education. Built sophisticated GPT-4 integration with function calling for structured educational assessment, processing 1000+ student submissions daily with 99.9% uptime.
Project Duration:
2024 - 2025 (Technical Lead, Freelance)
Key Technical Achievements:
- AI Integration Excellence: Built sophisticated GPT-4 integration with function calling for structured educational assessment
- Multi-Language Processing: Implemented LanguageTool integration supporting English, German, Spanish, French, and Italian with cultural adaptations
- Real-Time Collaboration: Architected Yjs-powered collaborative editing with live feedback, comments, and presence indicators
- Database Architecture: Designed complex 16-table PostgreSQL schema with audit trails, versioning, and educational analytics
- Performance Optimization: Achieved sub-10 second comprehensive essay analysis with 99.9% uptime
- Hybrid Grading System: Implemented AI-human hybrid grading workflow for quality assurance
Technical Implementation:
- AI/ML Stack: OpenAI GPT-4 with function calling, Google Gemini, Custom prompt engineering
- Frontend: Next.js 15, React 19, TypeScript, Tailwind CSS, Yjs for collaboration
- Backend: Python FastAPI, PostgreSQL with Drizzle ORM, Redis for caching
- Language Processing: LanguageTool API integration, Custom grammar rules, Multi-language support
- Real-time Features: WebSocket connections, Presence tracking, Live cursor positions
Business Impact:
- Scale: Platform processes 1000+ student submissions daily across 5 languages
- Efficiency: Reduced grading time by 75% while maintaining quality standards
- Accuracy: AI-powered suggestions with 95% acceptance rate by human reviewers
- User Satisfaction: 4.8/5 rating from students and teachers
Technical Innovations:
- Structured Assessment: GPT-4 function calling for consistent, rubric-based grading
- Cultural Adaptation: Language-specific feedback patterns and educational conventions
- Audit System: Complete history tracking for educational compliance
- Collaborative Infrastructure: Real-time multi-user editing with conflict resolution
Skills Demonstrated:
Technical Leadership, AI/ML Integration, Database Design, Real-time Systems, Educational Technology, Multi-language Processing, System Architecture, Performance Optimization