Javier Ramirez

• Architecture & Platform:

• Built a multi-tenant SaaS platform with strict data isolation per account across every query and model.

• Designed a monorepo structure (Turborepo + npm workspaces) with 3 apps and 5 shared packages with internal dependencies.

• Implemented event-driven architecture with async processing via SQS and a complete audit trail.

• Full-Stack Development:

• Developed 18+ API modules with Express 5, Zod validation, and rate limiting with Upstash Redis.

• Built 30+ feature modules in Next.js 14 App Router with Server Components and Server Actions.

• Created a shared UI component library with shadcn/ui, Radix primitives, and Tailwind CSS.

• Integrated external services: IoT sensor providers (Tive, Berlinger), AI-powered OCR (OpenAI GPT-4V), and transactional email (Resend).

• DevOps & Infrastructure:

• Set up serverless deployment with AWS Lambda and API Gateway across multiple environments.

• Configured CI/CD with GitHub Actions for automated builds, S3 uploads, and Lambda function updates.

• Designed a database schema with 50+ models using Prisma, with universal soft-delete and audit logging patterns.

• AI & Automation:

• Built an SEO-focused landing page generator using n8n automation pipelines.

• Configured the project development harness with skills and tooling for AI-assisted workflows (OpenCode, Claude Code, Copilot Cloud).

• Set up a marketing agent (Hermes) using MCP and connectors to automate marketing tasks.

• Contributed to the Gaia4Sustainability outreach project:

• Worked on raising awareness about light pollution and its effects on ecosystems and human life.

• Collaborated with cross-disciplinary teams to translate satellite data into accessible outreach materials and demonstrations.

• Developed hardware and firmware for the FreeDSM initiative:

• Designed and prototyped an affordable, long-lasting device to measure local irradiance for light-pollution studies.

• Integrated sensors, power management and data-logging features to allow distributed deployments and reliable field measurements.

• Implemented data validation and calibration routines to enable comparison with Gaia satellite irradiance products.

• Built data infrastructure, modelling and backend services:

• Implemented a model that estimates irradiance for a given time and place using astronomical parameters and observational metadata.

• Developed Flask-based backends and containerized services (Docker) to collect, store and serve device and model data.

• Created pipelines to compare ground measurements with satellite observations and produce metrics for light-pollution analysis and outreach.

• Wrote documentation, tests and helped maintain reproducible deployments for field teams.

• Collaborated on the Classpip open-source gamification project:

• Implemented improvements and new features to support classroom gamification scenarios.

• Worked closely with maintainers to submit clean, documented contributions and PRs.

• Designed and implemented a geocaching mode:

• Built geolocation-based gameplay using browser/device geolocation APIs and OpenStreetMap services.

• Integrated map tiles, marker management and route handling to support location-based challenges.

• Delivered supporting work and thesis documentation:

• Implemented front-end logic, UI improvements and performance refinements for the new mode.

• Packaged a demo and deployment-ready assets for evaluation by supervisors and users.

• Thesis (memory) available at: https://errezeeta.github.io/javier.dev/assets/JRM_thesis.pdf