You will get Full stack APIs .NET C#, Angular, Rect, AWS, Azure, GCP
Project details
What I do
• REST APIs and Microservices: ASP.NET Core Web API, Entity Framework Core, Dapper, clean architecture, performance tuning, caching (Redis)
• Frontend: React/Angular/Javascript
• AI & RAG Systems: LLM integration, retrieval-augmented generation, vector search (Pinecone), chatbots, semantic search, video/audio transcription pipelines
• Data Layer & Databases: SQL Server, PostgreSQL, MySQL, MongoDB, Firestore; schema design, indexing, query optimization, migrations, profiling
• Security & Auth: OAuth2, OpenID Connect, JWT; secure API design and best practices
• Cloud & DevOps: Azure, AWS, GCP; Docker and Kubernetes; scalable, cost-aware deployments; logging/monitoring
• Background Processing: Cron jobs, worker services, scheduled tasks, resilient retries
• Integrations: Stripe, SendGrid, Segment, GitHub; third‑party API integration
• Multi-Tenant SaaS: Tenant isolation, shared resources, and lifecycle management
• REST APIs and Microservices: ASP.NET Core Web API, Entity Framework Core, Dapper, clean architecture, performance tuning, caching (Redis)
• Frontend: React/Angular/Javascript
• AI & RAG Systems: LLM integration, retrieval-augmented generation, vector search (Pinecone), chatbots, semantic search, video/audio transcription pipelines
• Data Layer & Databases: SQL Server, PostgreSQL, MySQL, MongoDB, Firestore; schema design, indexing, query optimization, migrations, profiling
• Security & Auth: OAuth2, OpenID Connect, JWT; secure API design and best practices
• Cloud & DevOps: Azure, AWS, GCP; Docker and Kubernetes; scalable, cost-aware deployments; logging/monitoring
• Background Processing: Cron jobs, worker services, scheduled tasks, resilient retries
• Integrations: Stripe, SendGrid, Segment, GitHub; third‑party API integration
• Multi-Tenant SaaS: Tenant isolation, shared resources, and lifecycle management
Programming Languages
JavaScript, ASP.NET, C#Coding Expertise
Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$99
|
Standard
$599
|
Advanced
$899
|
|---|---|---|---|
| Delivery Time | 1 day | 5 days | 7 days |
Number of Revisions | 1 | 2 | 3 |
Number of Pages | 1 | 2 | 3 |
Design Customization | - | - | - |
Content Upload | - | - | - |
Responsive Design | - | - | - |
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$99 - $199
Additional Revision
+$20
Additional Page
(+ 1 Day)
+$50About Tuyen
AI Developer / RAG / Chatbots / LLMs / Senior .NET C#
Hanoi, Vietnam - 10:37 am local time
Top Rated Plus | $90K+ Earned | 10+ Clients | 3000+ Hours
I help startups and companies build production-ready AI applications using LLMs, AI agents, and scalable backend systems.
I specialize in building AI-powered SaaS platforms, agentic workflows, RAG systems, and high-performance APIs using .NET, OpenAI, and modern cloud infrastructure. My work focuses on turning AI ideas into real, scalable products.
If you need an AI developer who understands both LLMs and backend architecture, I can help design and build reliable AI systems that work in production.
Core Expertise
- AI Developer
Build AI applications using OpenAI, embeddings, vector databases, and LLM-powered workflows.
- LLM Engineer
Design and implement LLM features such as chatbots, copilots, AI assistants, semantic search, and automated reasoning systems.
- AI Agent Developer
Build autonomous AI agents and agentic workflows that interact with APIs, tools, and external systems.
- RAG Developer
Develop Retrieval Augmented Generation systems with embeddings, vector search, and knowledge retrieval pipelines.
- OpenAI Developer
Integrate OpenAI APIs for chatbots, copilots, AI automation, transcription, and AI-powered features.
- AI SaaS Backend
Build scalable backend systems and APIs that power AI applications and SaaS platforms.
- AI and LLM Stack
OpenAI, GPT models, embeddings, vector search, Pinecone, semantic search, AI agents, workflow automation, AI copilots, transcription pipelines
- Backend Development
.NET, C#, ASP.NET Core, Web API, microservices, distributed systems, event-driven architecture
- Databases
PostgreSQL, SQL Server, MySQL, MongoDB, Redis, Firestore, vector databases
- Cloud and DevOps
AWS, Azure, GCP, Docker, Kubernetes, CI/CD, scalable cloud infrastructure
- Security
OAuth2, OpenID Connect, JWT, Auth0
- Integrations
Stripe, Twilio, SendGrid, Segment, GitHub, Datadog
How I Work
- I focus on building reliable, production-ready systems with clear communication and structured delivery.
- Clear architecture and technical planning
- Milestones and frequent demos
- Clean, maintainable production code
- Scalable AI system design
- Reliable and on-time delivery
If you are building an AI product, AI SaaS platform, or LLM-powered application, I can help design and implement the system end-to-end.
Steps for completing your project
After purchasing the project, send requirements so Tuyen can start the project.
Delivery time starts when Tuyen receives requirements from you.
Tuyen works on your project following the steps below.
Revisions may occur after the delivery date.
Collecting Requirements
Implementation