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I build software that holds up in production.

Full-stack engineer and founder. Over seven years running Beyond The Brackets, I've shipped 30+ web, mobile, and AI products, and taken over many more that were breaking. Now I'm building Grace, infrastructure for AI software reliability.

Products shipped
30+
Running the agency
7 yrs
Projects listed
11
Based in
Paris

Based in Paris, France. Coding since 14, EPITA engineer.

What I can do, and what proves itlocked19 nodes · 18 edges
MobileProduct engineeringBackend and dataInfrastructure and DevOpsAI systemsBusiness systemsSpecializedLeading the workQLLOMedshieldBours'O JeuxInventozenBrandywineGraceLegacy ERPDMS reportingTelecom coreDeemeaBeyond The Brackets

How I work

Loïc Guillebeau

I've been writing code since I was 14. I started Beyond The Brackets at 18 and bootstrapped it, and people have come to me for two reasons ever since: to build a product from scratch, or to take over one that nobody dares to touch anymore.

The second kind taught me most of what I know. Inheriting a codebase whose author has left, or one generated by AI tools, taught me how software actually fails in production, and what it takes to make it dependable again.

I have rarely worked alone. I lead a team of developers and designers, and the work usually arrives as a business problem rather than a specification: what the product has to do, what it is worth building, and who keeps it running once we have gone. On the same project I will do the audit, the architecture, the product decisions and the handover, so I read a system end to end rather than only the part I was handed.

I always work in the same order.

  1. ReadRead the code and say plainly what holds and what doesn't.
  2. FixFix what breaks or puts data at risk.
  3. BuildOnly then build what comes next.

That habit is what led me to build Grace.

Selected work

All 11 projects

Taking over and stabilizing

Products inherited mid-flight, with no author left to ask.

02

Inventozen

Catalogue and artist-website platform

Took over the product blind after the previous freelance developer disappeared. Stabilized it, then kept building: public artist sites, a multilingual CMS architecture, and a release flow that keeps production predictable. The platform grew from 1 to about 100 customers, and we've run its ongoing support since July 2025.

  • Next.js
  • React
  • NestJS
  • PostgreSQL
  • Prisma
  • pgvector
  • Kubernetes
  • AWS
  • Scaleway

Rebuilding a legacy ERP

Manufacturer in the jewellery supply chain (anonymous)

Rebuilt an aging in-house ERP after its original developer retired. Automated lot tracing that was done by hand, and added OCR on incoming weight records, as the base for auditable chain-of-custody traceability.

  • ERP design
  • OCR
  • Data modeling
  • Compliance-oriented traceability

Building from scratch

From an idea to something running in production.

06

QLLO

Delivery and ride-hailing super-app

Outsourced CTO from idea to launch: shipped to the App Store and Google Play in four months on a tight budget. We still run maintenance and a CTO block.

  • Mobile architecture
  • Store releases
  • Technical leadership

Brandywine Homes

US real-estate platform

A Zillow-style listings platform built on top of the Yardi ERP, with a Strapi page builder for content. About 18,000 visitors a month. We maintained it for a year, then handed it over to their in-house team.

  • Yardi ERP integration
  • Strapi
  • Web platform
  • Handoff

Bours'O Jeux

Second-hand board game markets at festivals

Mobile app and back office. Designed a white-label architecture with a shared games catalogue and a multi-tenant database isolated with row-level security, plus an over-the-air build and update pipeline.

  • React Native
  • Expo EAS
  • NestJS
  • Refine
  • PostgreSQL RLS

Medshield Ascend

US health-tech startup

Marketing site and lead funnel connected to HubSpot, delivered in three weeks.

  • Next.js
  • HubSpot

Telecom core

Internal infrastructure at Beyond The Brackets

Built a telephony core from scratch on Asterisk, connected directly to a SIP provider instead of relying on Twilio.

  • Asterisk
  • SIP

Reporting on top of a DMS

IT services group (anonymous)

An internal reporting application on top of the company's document management system: order backlog, revenue still to invoice, and maintenance contracts.

  • Data integration
  • Reporting
  • Dashboards

Working inside other teams

Engineers placed under a client's CTO.

01

Deemea

Health-tech, 2024

Two of our developers joined their team under the CTO to build a 3D medical-imaging viewer on OHIF. A one-month mission extended to six.

  • OHIF
  • Medical imaging
  • Team augmentation

My own ventures

Companies I co-founded and ran.

01

Accelerio

Online booking platform for motorsport

Co-founder and CTO, 2021 to 2026

Driving experiences, events, and training. We closed it in 2026 because of market headwinds.

  • Booking platform
  • Product
  • Co-founding

What I can do

Each one is listed with the projects that prove it, not with a rating out of five.

Path so far

These overlap, on purpose. Beyond The Brackets has been running underneath everything since 2019.

  • 2026 → now

    Founder

    Grace

  • 2021 → 2026

    Co-founder and CTO

    Accelerio

  • 2021 → 2023

    Technical advisor (CTO)

    Packle

  • 2021 → 2022

    Applied Innovation Exchange intern

    Capgemini

  • 2020

    Exchange semester

    California State University, Los Angeles

  • 2019 → now

    Founder and CTO

    Beyond The Brackets

  • 2018 → 2023

    Diplôme d'Ingénieur

    EPITA, master's-level engineering degree in computer science

If you're building AI that has to work in production, I'd like to talk.

lguillebeau@orange.frWrite to me →