Jap D.

I help businesses build and improve Python applications, from Django and FastAPI APIs to AI integrations, databases, payments and deployment. I also develop LLM-powered features, including document Q&A, RAG workflows and AI assistants connected to your application’s data and APIs. With nearly five years of development experience, I’ve worked on education platforms, ERP inventory and finance workflows, SaaS integrations and automation. If you have an existing application with bugs, slow endpoints or unfinished features or want to add AI capabilities I can review the code, explain the priorities and implement maintainable improvements. I am also ai developer helping integrate AI features into application workflows, with validation, access controls and reliable API handling. 🏆 Top Rated on Upwork | 100% Job Success Score | $30K+ Earned RELEVANT PROJECT EXPERIENCE • Education platforms - On Eddi, I worked on multi-role application features and purchasing workflows over a long-term engagement. • ERP and business applications - My work includes Python/Django inventory and finance modules, business logic and backend-to-frontend integration. • SaaS and API integrations - I have worked on subscription onboarding and lifecycle integrations, Stripe and Plaid integrations, and scheduled API-to-database imports with filtering and duplicate prevention. WHAT I CAN HELP YOU WITH • Python Backend Development Django, Django REST Framework, Django Ninja, FastAPI and Flask applications with clean architecture, validation, authentication and maintainable business logic. • REST APIs and Integrations Third-party API integrations, webhooks, OAuth, payment systems, scheduled synchronization, idempotency, retries and structured data processing. • PostgreSQL and Supabase Relational database design, SQL queries, migrations, constraints, indexing, data imports, duplicate prevention and performance optimization. • AWS and Deployment Docker, EC2, RDS, S3, SES, Lambda, CloudFront, Route 53, Nginx, Gunicorn, Redis, Celery and CI/CD pipelines. • AI Development OpenAI API integration, structured model outputs, document Q&A, RAG workflows, embeddings and controlled tool calling connected to real application data.