Web Developer & Systems Engineer
Building high-performance e-commerce platforms, secure API architectures, custom systems integrations, and optimized server networks.
About Giovanni Di Grezia
I am a Full-Stack Web Developer and Systems Administrator with a balanced skillset that spans frontend design and low-level server optimization. My work ranges from building lightweight, modern user interfaces to configuring bare-metal servers, orchestrating databases, and developing custom integration scripts.
By bridging computer science theory and infrastructure engineering, I design and run systems that are fast, secure, and scalable. I configure secure Nginx gateways, manage virtual private networks, deploy database replication clusters, and interface with deep learning endpoints to build modern, AI-powered web solutions.
Frontend Engineering
Developing responsive, semantic, and fast interfaces using modern Javascript and lightweight CSS layout techniques for optimal core web vitals.
Backend & APIs
Designing secure, modular API architectures (REST) with proper validation layers, caching, and clean request routing logic.
DevOps & Cloud
Deploying application stacks on VPS and bare-metal servers. Configuring SSL automation, reverse proxies, and continuous deployment workflows.
E-Commerce & Data
Structuring custom transactional platforms, optimizing relational/document schemas, tuning query indexes, and managing database clustering.
The Mechanics of Web Systems
A look into the fundamental technical pillars that power scalable web sites, from resource utilization to edge networking protocols.
HTTP/2 & Asset Delivery
Utilizing multiplexing, custom cache headers, and global CDN distribution layers to ensure assets load instantaneously close to the end user.
Reverse Proxy & Compression
Configuring Nginx gateways to manage SSL/TLS handshakes, load balance traffic to upstream servers, and compress payloads with Gzip/Brotli.
Database Optimization
Analyzing slow logs, creating performance indexes, tuning server buffer sizes, and structuring relationships to keep query response times minimal.
Session & Auth Security
Implementing stateless JSON Web Tokens (JWT), secure HTTP-only cookies, password hashing, and CSRF/CORS security policies.
State Management
Maintaining client-side data state in unified repositories to decouple UI rendering from network latency, providing a fluid user experience.
DNS & Infrastructure Security
Managing nameservers, SPF/DKIM/DMARC mail safety records, DDoS protection walls, and configuring local software firewalls (UFW/fail2ban).
System Automation & Cron Jobs
Authoring Python, Bash, and Node scripts to automate backups, synchronize databases across remote zones, check endpoint statuses, and deliver slack alerts.
AI-Powered Integrations & Web Platforms
Blending web applications and artificial intelligence by designing workflows that interact with language models, vector indexes, and cloud GPU instances.
Cloud GPU Orchestration
Interfacing with GPU runtimes via secure web sockets and REST APIs to process model inference tasks asynchronously.
Vector Databases
Setting up and querying specialized vector databases to support semantic searches and document matching tasks.
LLM Agents & Logic
Constructing pipeline microservices that clean prompt contexts, route queries to local/remote models, and parse outputs back into strict JSON schemas.
Need Custom Web Development, E-Commerce, or DevOps Services?
Whether you need to migrate ecommerce or create new ecommerce, manage an existing or new baremetal server, build a secure REST API architecture, automate cloud deployments, or integrate custom AI endpoints into your software — I offer transparent, direct, and focused freelance collaboration.
High-Performance Web Applications
Every application is engineered with performance and clean code structure in mind. By avoiding heavy bloated libraries, we ensure fast render speeds, optimal core web vitals, and excellent search engine indexing.
E-Commerce Migration & Development
Migrating legacy e-commerce catalogs and customer databases, or developing completely new transactional platforms. Designed with lightweight logic for fast checkouts, secure API gateway integrations, and reliable database layers.
Secure & Scalable Infrastructure
Building pipelines that handle spikes in traffic seamlessly. From caching servers and load balancers to redundant database setups and strict security configurations, your platform is designed to scale securely.
Bare-Metal & Server Management
Setting up, optimizing, and maintaining existing or new bare-metal servers. Expert configuration of custom virtualization nodes, operating system tuning, VPN tunnels, backups, and security hardening.
Let's Build Something Exceptional
Have a web portal to build, a database to optimize, a custom API to develop, or a server migration to plan? Get in touch and let's discuss your project.
Discuss Your Project →Projects & Case Studies
A small selection of public projects. I usually contribute to closed-source systems protected by strict NDAs, including Ethereum smart contracts, security-hardened backend engines (Node.js/Python), and low-level C codebase developments that cannot be shared.
Proteo
Heavy-duty, closed-source desktop encryption engine written in Node.js leveraging native OS operations to split and verify large files.
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Sognaresofa & CasaMiaIn
Managing Shopify e-commerce for shop.sognaresofa.it, AI-optimized ad campaigns, and bare-metal server infrastructure for caasamiain.it and sognaresofa.it.
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Kymera
Proprietary digital publishing image engine. Transforms content with custom fingerprint metadata and instant hot-reloading configurations in a standalone binary.
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Workitect
Web server migration, database performance debugging, advanced cache configuration, and multi-registrar domain consolidation.
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Car Relax
Centralized multi-site warehouse control, real-time inventory automation, and repair workflow tracking for automotive networks.
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3DRap
Scaling global simracing e-commerce to 70 countries, managing bare-metal servers, custom recursive WMS, and 3D print farm automation as CTO.
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LifeBag
Automating custom QR-code packaging, managing bare-metal servers, and orchestrating Amazon Seller Central channels.
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SMP
Bare-metal server operations, domain portfolio consolidation under a single registrar, and legacy codebase compatibility support.
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Rigenera
Orchestrating Magento 1 to Magento 2 migrations, custom B2B/B2C portals, global ads, and eBay automation scripts for Eumakers.
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M.A.C srl
Cross-platform speedtest mobile app utilizing Apache Cordova to collect client bandwidth and diagnostic telemetry logs.
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AC Finance
Multi-site corporate infrastructure maintenance, freelance client developments, and server migration advisory.
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Project X
A 3D spatial logic puzzle game developed as an academic study project utilizing Three.js and WebGL rendering pipelines.
View Case StudyOther Minor & Academic Projects
An archive of academic experiments, scripts, and utilities developed or used in production.
Low High Head
Academic experiment utilizing Three.js and custom shaders to dynamically transform a 3D head model between low-poly and high-poly resolutions, testing light propagation and custom effects.
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AES Custom Tiers
Native C/C++ implementation of the Advanced Encryption Standard (AES) modified during computer science studies to test extended block tiers (AES 384, 512, and 1024).
Visit ArchiveOpenStack Swift Backup
A secure Python backup and restore utility developed for restricted corporate cloud environments to back up Synology NAS datasets directly to OpenStack Swift storage.
View SourceiOS IPA Resign Script
Legacy Bash script utility developed to automate entitlements injection and sign own applications, increasing internal distribution speeds when needed (no longer actively maintained).
View Source