Designing systems that think, and homes that listen.
I'm Juan, a Technical Lead at DXC building enterprise platforms on ServiceNow. After hours I run a homelab full of Raspberry Pis, local LLMs, and far too many Zigbee sensors.
01 / Experience
Five years building on ServiceNow
ServiceNow Technical Lead
Technical Lead embedded in a client delivery team. Senior development, code reviews, and technical decisions across ITSM and CSM workstreams.
ServiceNow Technical Consultant
ServiceNow Technical Consultant delivering implementation projects for international clients.
Multiple Roles
Technical coordination for an ITSM module implementation. Defined the technical approach and worked across teams to hit go-live.
Led a team of three for an international telco client. User story gathering, development, and delivery using agile methodologies.
Built features across PPM, ServicePortal, ITSM, CSM, and Integrations. Business Rules, Client Scripts, UI components, and scripting day to day.
Technical support for an international telco client. Incident resolution and custom developments in ServiceNow Core.
ServiceNow development fundamentals, ITSM, and CSA basics.
Data Visibility Engine DVE
Configurable row-level security framework for ServiceNow
Enterprise instances need fine-grained control over which records each user can see. Native ACLs are rigid and hard to maintain at scale. There was no reusable, admin-friendly way to enforce record-level visibility without writing custom code per use case.
Built a configurable Before Query Business Rule framework that enforces record-level visibility at query time. Supports multiple match types including User Criteria, uses server-side session caching for performance, and includes an admin UI for managing rules without scripting plus a simulation tool for testing visibility logic before deployment.
R to randomize
02 / Lab
Things I build after the dayjob
Smart Home Stack
home-automationFully automated home running Home Assistant, Node-RED, ESPHome, and Zigbee. Custom automations backed by MariaDB, dashboards, and secure remote access.
Local LLM & Voice Assistant
ai-pipelineSelf-hosted Ollama running LLMs on local hardware. Integrated into a distributed, fully offline voice assistant pipeline.
Homelab & Self-hosting
infrastructureRaspberry Pi cluster with Tailscale VPN mesh. Self-managed services focused on privacy, control, and reliability.
03 / Toolkit
The stack I reach for
/ NOW
Let's build something good together.
Open to ServiceNow consulting, freelance engagements, and technical advisory. Based in Málaga, available remotely worldwide.