I will build custom ai agents, rag systems and llm features for your saas


Level 2
Gig Summary
About this gig
Struggling to add real AI to your product, stuck between demos that impress and features that never reach production? I build AI agents, RAG systems and LLM features that actually ship.
I'm Carlos, a backend and automation engineer with 10+ years building production systems (M.Sc. in Cloud Application Development). I turn your idea into a reliable, scalable AI layer, not a fragile prototype.
What you get:
- Custom AI agents that take real actions inside your app, not just chat.
- RAG systems that answer from your own data (docs, database, knowledge base), with sources, not hallucinations.
- LLM integration with OpenAI (GPT), Anthropic (Claude) or private/local models when data privacy matters.
- Production-grade APIs built for security, speed and scale.
Why me: you get an AI feature your users trust and your team can maintain, delivered with clear milestones, clean documented code and honest communication from day one.
Please message me before ordering so we scope the right solution for your stack.
Get to know Carlos S
Scale your business with intelligent automation and time saving AI solutions
Level 2
- FromSpain
- Member sinceAug 2015
- Avg. response time1 hour
- Last delivery2 weeks
Languages
English, Spanish, French, German
HISPALEMAN
Kiosko y más
My Portfolio
Other Software Development Services I Offer
FAQ
Do you work with existing projects?
Yes. I can extend or fix existing Node.js backends.
Can you integrate third-party services or APIs?
Yes. I can integrate payment providers, CRMs, email services, and other APIs.
Can you sign an NDA?
Yes, if required.
Can you work with local AI models for greater privacy?
Absolutely. If your project requires that data never leaves your servers, I can implement local models (such as Llama or Mistral) to ensure maximum data privacy.
Is my current software compatible with these integrations?
Most modern systems support API integrations. However, I recommend contacting me before placing an order so I can review your tech stack and ensure perfect compatibility.
Do you deploy the backend?
I provide Docker-ready setup and deployment guidance. Full deployment can be discussed.
Do I need to have my own API keys?
Yes. To maintain security and control over your costs, I will guide you through setting up your own accounts with OpenAI, Anthropic, or the provider of your choice.
What level of security do the solutions offer?
I specialize in developing secure backends. I implement encryption practices and data handling standards that comply with privacy requirements, ensuring that AI integration does not become a vulnerability for your SaaS.
Do you offer maintenance after delivery?
I deliver clean, well-documented code to make it easy to maintain. If you need ongoing support or future updates, we can discuss a customized maintenance plan.
16 reviews for this Gig
| (16) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
D dodo222
Repeat Client

France
Very good 2nd experience with Carlos. Thanks again !
Up to $50
Price
1 day
Duration
S 
Seller's Response
Helpful?D dodo222
Repeat Client

France
The rate seems to me very cheap compare the work Carlos achieve. Carlos was very helping, when I had questions he always helped me ! He is a very good and professional developer.
$50-$100
Price
4 days
Duration
S 
Seller's Response
Helpful?R ramporandla
Repeat Client

United Kingdom
Amazing work.
$200-$400
Price
3 months
Duration
S 
Seller's Response
Helpful?L 
llopisventures

Spain
Todo genial! Gracias!
$50-$100
Price
7 days
Duration
S 
Seller's Response
Helpful?R ramporandla
Repeat Client

United Kingdom
Amazing work.
$50-$100
Price
3 days
Duration

S 
Seller's Response
Helpful?
16 reviews for this Gig
| (16) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
D dodo222
Repeat Client

France
Very good 2nd experience with Carlos. Thanks again !
Up to $50
Price
1 day
Duration
S 
Seller's Response
Helpful?D dodo222
Repeat Client

France
The rate seems to me very cheap compare the work Carlos achieve. Carlos was very helping, when I had questions he always helped me ! He is a very good and professional developer.
$50-$100
Price
4 days
Duration
S 
Seller's Response
Helpful?R ramporandla
Repeat Client

United Kingdom
Amazing work.
$200-$400
Price
3 months
Duration
S 
Seller's Response
Helpful?L 
llopisventures

Spain
Todo genial! Gracias!
$50-$100
Price
7 days
Duration
S 
Seller's Response
Helpful?R ramporandla
Repeat Client

United Kingdom
Amazing work.
$50-$100
Price
3 days
Duration

S 
Seller's Response
Helpful?

