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English
$
USD
I will build your backend with nodejs, python, go or java
Carlos Salguero
5.0
5.0
About this gig
Most backends work -- until they don't. They fail when traffic increases, features expand, or multiple teams start building on top of them. Fixing that later is expensive.
I design and build production-grade REST and GraphQL APIs that scale from day one.
What sets me apart
- Owned backend architecture at Fortune 500 scale -- microservices platform used by 50+ engineers
- Shipped a full CRM backend as architecture owner for a 15-person team (2 production releases)
- 95% test coverage on every delivery -- no black boxes, no surprises
What you get
- REST and/or GraphQL API
- Node.js, Java, GO, or Python backend
- PostgreSQL + Redis
- Authentication & RBAC
- Modular monolith, Hexagonal, or microservices architecture
- Swagger/OpenAPI documentation
- Deployment-ready (AWS, Docker)
What I build
- SaaS backends and internal APIs
- Microservices and distributed systems
- High-performance data pipelines
- Platforms multiple teams can build on
Not a fit
- WordPress / PHP backends
- Firebase-only projects
- Quick prototypes with no scalability needs
Get to know Carlos Salguero
Carlos Salguero
Senior AI Systems Architect and Backend Engineer
- FromMexico
- Member sinceNov 2024
- Avg. response time1 day
- Last delivery1 month
Languages
English, Spanish, German, Korean
Senior AI Systems Architect & Backend Engineer. I specialize in high-performance infrastructure and production-grade RAG pipelines. With experience processing 100k+ daily records at Fortune 500 scale (PPG Industries), I build secure, deterministic systems.
IEEE-published researcher (CHILECON 2025) and founder of Qantara Systems. I engineer using Go, Rust, and Python, ensuring a strict 95% test coverage standard. CS graduate from Tec de Monterrey. I don't build wrappers; I build production ecosystems. Message me for complex requirements.
My Portfolio
FAQ
Can you work with an existing codebase?
Yes, share your repo during our initial chat and I'll confirm scope. If it needs a cleanup pass first, I'll let you know upfront.
Do you use AI to generate the code?
I use AI as a tool where it helps with boilerplate, but every architectural decision, data model, and critical path is designed and reviewed by me. You're getting senior engineering judgement, not a prompt dump.
What if I need more endpoints than the package includes?
Message me before ordering with your full list -- I can create a custom offer to the right scope.
Will the code be well-documented?
Yes, every package includes at minimum a Postman collection or OpenAPI spec. The architect tier includes full inline documentation.
Do you offer ongoing maintenance after delivery?
I deliver clean, maintainable code. For ongoing support beyond the project, message me to discuss a maintenance retainer.
Reviews
1 reviews for this Gig
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| (0) | ||
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Rating Breakdown
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- Quality of delivery
- Value of delivery
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pera84
Repeat Client
United States
Carlos helped us with technical infrastructure and platform integration work. He was responsive, professional, and willing to investigate issues carefully rather than rushing through the job. He communicated well during the process and worked patiently through the server and configuration challenges...
$200-$400
Price
3 weeks
Duration
Helpful?
Reviews
1 reviews for this Gig
| (1) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
Sort By
Most relevant
P pera84
Repeat Client
United States
Carlos helped us with technical infrastructure and platform integration work. He was responsive, professional, and willing to investigate issues carefully rather than rushing through the job. He communicated well during the process and worked patiently through the server and configuration challenges...
$200-$400
Price
3 weeks
Duration
Helpful?
