GuglielmoDigital Systems Architect & AI Strategist

I'm Guglielmo, a digital systems architect who ships secure production software solo: architecture, code, infrastructure, and the AI automation layered on top. 120K+ community, 20+ projects shipped.

Founder of PeakCore LLC. Self-taught, no degree. Everything I know, I built by shipping it.

I combine three skills that rarely overlap: full-stack engineering, offensive and defensive security, and AI implementation. The intersection of build, protect, automate is what separates me from specialists who only do one of them.

120K+
Community
20+
Projects shipped
5+
Years building

How I work

Delivery
Build, don't talk. Portfolio over promises.
Security
Not optional. Secure by default, from the first commit.
Quality
Production-grade from day one, or it does not ship.
AI
A force multiplier, never a crutch.
Focus
Deep work over context switching.

Tech stack, interactive

Featured Work

Live systems, shipped products, and ventures in progress. Every one designed, built and deployed by Guglielmo alone under PeakCore LLC: full-stack engineering, AI automation and security hardening.

In productionOwner & Founder

ReelVance

reelvance.com

Autonomous short-video engine with a paid SaaS console. It discovers trends, writes scripts, renders video with voice and captions, then publishes to TikTok, Instagram and YouTube on its own. Built end-to-end solo: engine, website, billing, Discord bot.

  • Born from a 20,000+ creator community
  • Runs entire channels autonomously, daily
  • Full pipeline: discover → script → produce → publish
TypeScriptRemotionNext.jsStripePlaywrightMCP
Visit reelvance.com
In productionOwner & Founder

AiGrow

aigrow.gg

SaaS growth platform brought to marketing-ready state: hardened security, SEO-prerendered frontend, and an auto-blogging engine that researches, writes and publishes optimized articles without human input.

  • 110K+ community built around the platform
  • SEO auto-blogging engine (Express + PostgreSQL)
  • Security hardened: risk cut from 8/10 to 2/10
React 19ViteExpressPostgreSQLTailwind 4
Visit aigrow.gg
ShippedTechnical Partner

SocrateOS

1o1.org

Cognitive operating system for 1o1.org, a verified nonprofit founded by Romanus Berg in collaboration with MIT. Built as Technical Partner on the team, not just for hire: dialectic chat with persistent Actor identity, cognitive memory graph, multi-persona board, artifact minting, document intelligence and admin tooling.

  • Technical Partner alongside founder Romanus Berg
  • Verified nonprofit, in collaboration with MIT
  • Dialectic chat, cognitive memory graph, artifact minting
Next.jsFastAPIpgvectorStripe
Visit 1o1.org
Security research
Active researcher on HackerOne. Multiple critical vulnerabilities found and reported to major companies. The findings themselves stay under NDA.

Tools & Side Projects

Internal tools, bots, security research, and automation built for personal and organizational use, including archived projects.

Centralized OAuth 2.0 Identity Provider built from scratch. Mandatory PKCE, RS256 JWT with key rotation, rotating refresh tokens with family-based reuse detection, Google SSO passthrough, Admin API.

PythonFastAPIPostgreSQLOAuth 2.0Docker

Red-team security research platform for authorized engagements. AI-powered copilot, isolated Docker-based lab, 200+ integrated tools, adversary emulation tooling, and a 22-phase engagement playbook modeled on real attacker workflows.

PythonDockerKali LinuxTorAI Copilot

AI agent that documents my work automatically. Personal operating system covering strategy, portfolio, projects and goals in plain Markdown. AI asks targeted questions to keep data current.

AI AgentMarkdownLife Management

…and many more projects built over the years.

Read how each of these was built, or see how an engagement works.

How Guglielmo builds software in four stages

Same order, every project. Solo engineering with AI-augmented tooling, security-first defaults and production standards from the first commit. The order never changes, because the cost of finding a threat model problem at stage four is the whole project.

  1. 01

    Research and threat model

    Map the problem space, the attack surface, and the constraints that are not negotiable. What "done" means is written down before any code exists, so scope cannot drift quietly.

    • Requirements and scope lock
    • Security threat modeling
    • Architecture decision records
  2. 02

    Architect and prototype

    Data models, API contracts, auth flows, infrastructure topology. The parts most likely to be wrong get answered first, with prototypes built to be thrown away rather than defended.

    • Database schema and RLS policies
    • API contract design
    • Infrastructure as code
  3. 03

    Build and harden

    Small increments, each one shippable. Every feature carries its own security review, performance budget and AI-assisted code analysis before it joins the trunk.

    • AI-augmented development
    • Security audit per feature
    • Automated CI/CD pipeline
  4. 04

    Deploy and iterate

    Docker-first releases with a rollback that has been tested, not assumed. What happens after launch is measured, and the next increment answers what the numbers actually said.

    • Containerized deployment
    • Production monitoring
    • Continuous improvement

What clients and engineers say about working with Guglielmo

Nothing here is paraphrased and nothing was written for this page. Every quote links back to the LinkedIn recommendation or the Trustpilot review it was taken from, so you can read each one at its source.

7 of many

Working with Guglielmo has been one of the most substantive technical collaborations of my career so far.

We built a working MVP of a dialectic AI engine in ten days. Within two hours of posting the job, I had 44 proposals. Guglielmo's stood out immediately, not for what he promised, but for how precisely he understood the problem.

What distinguished him throughout was his consistent delivery and his unusual clarity and honesty in communication. When he disagreed, he said so directly and with reasoning. When something needed flagging, he flagged it before I asked. His technical decisions were sound, and his architecture is clean enough that a student cloned it and ran it independently.

He also thought beyond the code. His strategic contributions (on privacy architecture, product differentiation, and the path toward a cognitive operating system) shaped the platform's direction in ways that went well beyond any single milestone.

He is a skilled negotiator and a serious thinker. Working with him required me to be more precise, accurate, and rigorous. That's rare.

While our work together is not done, I'm leaving this review now to honor what's been built so far, and to leave room for a future update when the next iteration proves itself equally excellent.

If you are building something that matters and need a technical partner who will hold you to a high standard (while having fun), Guglielmo is that person.

Romanus BergFounder, 1o1.org

Read it on LinkedIn

The reviews, in 19 seconds

The rest, in full
  • I had the pleasure of working with Guglielmo P, Founder of PeakCore, building a mock stock portfolio platform, including a landing page, credential/login flow, and dashboard. Even after his investor backed out and the terms of our engagement changed, he stood by his word and paid me for the work delivered, which says a lot about his integrity. Beyond the transaction, Guglielmo brought me into his Discord community focused on building with AI, genuinely investing in helping me grow my skills. He's someone who follows through on commitments and is generous with knowledge. I'd happily work with him again.

    Nwosa TochukwuFull-Stack Developer (Next.js, NestJS)Collaborator, PeakCore ·

    Read it on LinkedIn

  • Guglielmo displays exceptional leadership and strategic thinking. His professionalism and empathy make him an outstanding collaborator. He approaches complex problems with clarity and delivers solutions that are both technically sound and business-aware.

    Muhammad NomanAI, Full Stack and DevOps EngineerLinkedIn recommendation ·

    Read it on LinkedIn

  • It's a pleasure working with Guglielmo. He clearly communicates his vision, knows what he wants, and collaborates with energy and passion. His leadership in product development is precise, structured, and user-centric.

    Akram DoumaSoftware Engineer and Scrum MasterMorocco ·

    Read it on LinkedIn

  • Guglielmo is one of the hardest-working professionals I've ever collaborated with. He is consistently active, reliable, and always responsive when support is needed. You can count on him every time. He never leaves things undone.

    Daniel NangutiDigital ConsultantKenya ·

    Read it on Trustpilot

  • Working with Guglielmo was a smooth and professional experience. He delivered my website on time, fully functional, and precisely as requested. I appreciated his structured approach, communication, and efficiency. Highly recommended for any serious digital project.

    Giulio RossaniEntrepreneur and web clientItaly ·

    Read it on Trustpilot

  • Guglielmo exceeded my expectations. He not only delivered the online store earlier than expected, but also implemented features I hadn't even considered. The result was clean, fast, and conversion-ready. I'm genuinely impressed by his attention to detail and commitment.

    Tony H.E-commerce business ownerUnited States ·

    Read it on Trustpilot

Tell me what you are building

A new product, an existing platform that has outgrown its architecture, or a system that needs to be secured before it ships. I read every message myself and reply within a day.

What makes me say yes
Work where architecture, security and AI overlap, and where I own the outcome end to end rather than a ticket queue.
What to include
What the system has to do, what already exists, and when it needs to be live. Rough is fine. Specific is faster.

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