PROJECTS

Projects & Case Studies

Eleven case studies. Two of them have not launched yet and are marked.

pooq.gr: Migration, Performance and Commerce Engineering

WordPress / WooCommerce / PHP 8.3 / MariaDB

Client

2026

View case study. Took over a live Greek WooCommerce store and rebuilt it across infrastructure, speed, structured data and checkout over months of work together, plus the shipping, payment and import tooling behind it. Lead Developer.

e-support Private KEP, Ioannina

Astro 7 / Tailwind v4 / Cloudflare Workers

Client

2026

View case study. Bilingual website for a private citizen-services bureau in Ioannina: 12 service categories, JSON-LD with GEMI/VAT identifiers, an AEO layer with build-time llms.txt and a markdown mirror, and CI gates at every step. From design comps to Cloudflare production. Lead Developer.

Kleidarakos B2B & Papanikolaou Doors

Medusa B2B / Next.js 16 / Express + TypeORM

Client

2024-present

View case study. A B2B marketplace replacing the spreadsheet-and-phone process for a Greek locksmith network. Quote workflows, multi-supplier catalog imports, and a 3D door configurator that lets customers visualise before ordering. Lead Developer.

Zosimades Nursing Home of Ioannina: Healthcare Ops Stack

Bun + Elysia / Hono / PostgreSQL 18

Volunteer

2024-present

View case study. Three systems that took the Zosimades Nursing Home of Ioannina off paper: clinical operations, inventory management, and a handheld scanner for shift inventory counts. Built as volunteer work, in production daily. Volunteer Lead Developer & Maintainer.

Heartbeat Pharmacy Platform

Medusa 2.14 / Next.js 16 / PostgreSQL

Employer

2024-present

Pre-launch
View case study. A full e-commerce platform for a Greek pharmacy, owned outright (no per-transaction SaaS bill), with AI shrinking SKU enrichment from days to hours. Lead Developer.

Komvos Connect

Fastify 5 / PostgreSQL 16 + Drizzle / Redis + BullMQ

Personal

2025-present

View case study. A self-hosted booking platform: drop a single script tag on any business website and you have availability, calendar sync, and confirmations. Replacing Calendly-class SaaS for clinics, hairdressers, and service providers. Lead Developer.

PGNI Hospital StorageManagement

Tauri 2 / Rust / React 19

Volunteer

2024-present

View case study. A Tauri + Rust + React desktop app that replaced a legacy C# WinForms system for tracking lab reagents and equipment at Ioannina University Hospital (Π.Γ.Ν.Ι.). Volunteer civic-tech work for a Greek public hospital. Volunteer Lead Developer.

Migraine Tracker

React Native 0.85 / Expo 56 / Express 5

Personal

2025-present

Pre-launch
View case study. A migraine-tracking mobile app whose export is real FHIR 4.0.1: attacks modelled as Observations coded in SNOMED CT and HL7 terminology, not ad-hoc JSON dressed up to look like it. iOS and Android, works offline. Lead Developer.

Rorsa Tools

TypeScript / Node.js 20+ / Vertex AI Nano Banana

Open Source

2025-present

View case study. An MCP toolkit that lets Claude (and other AI agents) generate, edit, and process images at production scale. 27 tools, batch processing, GPU-accelerated background removal. The toolkit that built this very portfolio's image set. Maintainer.

TaskFlow

Fastify / PostgreSQL + Drizzle / Redis + BullMQ

Personal

2024-present

View case study. An offline-first task-dispatch PWA for hospitality teams. Realtime updates via Socket.IO, BullMQ scheduler for recurring tasks, IndexedDB mutation queue so the app keeps working when the Wi-Fi drops. Multi-tenant SaaS, live and free at tasks.jimrarras.com. Lead Developer.

Delivery Tracker

Fastify / PostgreSQL + PostGIS / Drizzle ORM

Personal

2024

View case study. A real-time delivery-dispatch system that assigns orders to drivers based on distance, current load, and historical performance. PostGIS spatial queries, Socket.IO driver tracking, scoring-based assignment iterated with the dispatch team. Lead Developer.

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