PRJ-002 // GUDCODClient work
Multi-tenant ERP
Operations backbone for manufacturing and logistics SMBs. Each tenant gets its own database; access is enforced by roles, tokens and API keys.
- Java 17
- Spring Boot 3
- MongoDB
- Hazelcast
- RBAC
Santiago Pulido//Backend engineer//Index
Rev. 2026 // Sheet 01 of 05Java · Spring · AWS
I build backend systems that move money and hold up when someone tries to break them.
I'm Santiago, a backend engineer who started out in infrastructure and SRE. These days I build payment processing on Java, Spring and AWS. I also hold a degree in Information Security, so I think about how a system can be broken while I design it.
- Role
- Sr. Software Engineer
- Focus
- Java · Spring · AWS
- Domain
- Payments & cloud
- Base
- Mendoza, AR · UTC-3
Readout● Nominal
Years shipping
6+
Since 2020, from SRE to backend
Runtime of choice
Java 21
Spring 6 · Jakarta EE · GraalVM
Degree
InfoSec
B.Sc. Information Security · 2026
Sec. 02//Log
Six years, from racking servers to running payment systems.
Entries 05
Order Newest first
Order Newest first
2025 — Now
Activeitti
Sr. Software Engineer//WEPA team · Remote, Paraguay
- Design and build payment processors and cash desks for WEPA, a bill-payment platform.
- Async, decoupled transaction processing on SQS so payments hold up during traffic peaks and third-party outages.
- Go services on AWS Lambda, REST API design, data modeling on PostgreSQL and DynamoDB.
2021 — Now
ActiveGUDCOD
Founder//Software studio
- Multi-tenant ERP for manufacturing and logistics SMBs: one isolated database per client, distributed cache, RBAC with JWT and API keys.
- End-to-end custom software for clients in production: architecture, backend, UI, data and CI/CD.
2022 — 2025
Slingr
Fullstack Developer
- Migrated the core backend from Java 11 / Spring 5 to Java 21 / Spring 6 / Jakarta EE.
- Co-led the frontend rewrite from DurandalJS to Angular 17+.
- CI/CD pipelines with Docker and Kubernetes on GCP, plus a steady cut of tech debt.
2021 — 2025
Toroide IT
Fullstack & DevOps//Part-time
- Web apps and multi-environment CI pipelines for builds, tests and deploys.
2020 — 2022
VAN P
SysAdmin / SRE
- Designed and rolled out networks for hundreds of client connections across several cloud and VPS providers.
- Linux and Windows server administration, plus internal automation tooling.
EducationB.Sc. Information Security // Universidad Siglo 21 // 2026
Sec. 03//Work
Selected builds: agents, platforms and tools that make other tools.
Index PRJ-001 → PRJ-004
PRJ-001 // 2025Thesis
Self-replicating vulnerability remediation agent
Native agents compiled with GraalVM spread across a cloud environment, find vulnerabilities and fix them on their own. A central platform tracks and steers the fleet.
- Java 17
- GraalVM
- Spring Boot 3
- MongoDB
- Angular
- AWS
PRJ-003 // 2025R&D
Real-time voice assistant
Talk to it and it gets things done. It calls custom tools over MCP and hands longer jobs to n8n workflows.
- React
- MCP
- n8n
- Realtime voice LLMs
PRJ-004 // 2025R&D
Fullstack app generator
A visual builder: describe the models, pick a stack, and it generates the endpoints and the UI.
- NestJS
- Angular
- MongoDB
- Docker
Sec. 04//Stack
Tools I trust in production, and the lab where I break things first.
Inventory25 items
Backend
- Java 8–24
- Spring Boot / Data / Security
- Go
- Node.js
- NestJS
- Python
Data & messaging
- PostgreSQL
- DynamoDB
- MongoDB
- MySQL
- AWS SQS
- Hazelcast
Cloud & ops
- AWS · Lambda · ECS
- GCP
- DigitalOcean
- Docker
- Kubernetes
- GitHub Actions · Jenkins
Frontend
- Angular 13–19
- Next.js
- TypeScript
Security
- Automated remediation
- RBAC · JWT · API keys
- Kali
- Nessus · OpenVAS
Lab // 01
Self-hosted Kubernetes
kubeadm, Gateway API on Envoy, Harbor and my own CI/CD. I'd rather own the cluster than git-push to a PaaS.
Lab // 02
Local LLMs
Running and tuning open models on my own hardware: quantization, KV cache, speculative decoding.
Lab // 03
Agent automation
Unattended coding-agent pipelines driven from the shell: specs in, retries on failure, diffs out.
Sec. 05//Contact