Command: stack

Stack

Technologies with an evidence level and where they were used. No percentage bars.

Strong: central to a large project with tests, CI or deploys, or to three projects. Moderate: central to one or two smaller projects. Weak: study or configuration only. Professional: technology used in past work, with no public repository here — listed separately, linked to the career.

Languages

Technology	Evidence level	Where	Last used
JavaScript (Node.js)	strong	A question pipeline with style measurement and an acceptance gate A product and project management office, with concurrent editing and no lost work A factory of technical hiring challenges, with a live defense and a human decision	Sep 2026
PHPModernizing an existing codebase.	moderate	A national confederation's member system, modernized with the legacy still live Reviewing and modernizing a live event-control system	Sep 2026
PythonA complete async API in a short project; in the case studies, comparing the screens before and after a review.	moderate	Reviewing and modernizing a live event-control system	Sep 2026
SQL (PostgreSQL, SQLite, MySQL)	strong	A study platform with payments, access control and timed exams A security review of the business logic of my own system A multi-company onboarding platform with isolation in the database A corporate site and an in-house CRM at the edge, with privacy as a requirement A national confederation's member system, modernized with the legacy still live	Sep 2026
TypeScript	strong	A study platform with payments, access control and timed exams A multi-company onboarding platform with isolation in the database A corporate site and an in-house CRM at the edge, with privacy as a requirement A high-end tourism portal prototype, with a data contract ready for the back end This site	Sep 2026

Frameworks and libraries

Technology	Evidence level	Where	Last used
Astro	strong	A corporate site and an in-house CRM at the edge, with privacy as a requirement This site	Sep 2026
Turborepo and pnpm monorepo	strong	A study platform with payments, access control and timed exams	Sep 2026
Next.js (App Router)	strong	A study platform with payments, access control and timed exams A multi-company onboarding platform with isolation in the database A creative holding's website with an admin panel, secret-link proposals and invoices A luxury vehicle and asset registry, from editorial site to sales console	Sep 2026
Preact	moderate	This site	Sep 2026
React	strong	A study platform with payments, access control and timed exams A product and project management office, with concurrent editing and no lost work A high-end tourism portal prototype, with a data contract ready for the back end	Sep 2026
Tailwind CSS	strong	A corporate site and an in-house CRM at the edge, with privacy as a requirement A luxury vehicle and asset registry, from editorial site to sales console A high-end tourism portal prototype, with a data contract ready for the back end Exam intelligence that shows its math	Sep 2026
Schema validation with Zod	strong	A study platform with payments, access control and timed exams A luxury vehicle and asset registry, from editorial site to sales console Media Archive: a catalog and personal list of films, series and anime Exam intelligence that shows its math This site	Sep 2026

Data

Technology	Evidence level	Where	Last used
SQLite and Cloudflare D1	strong	A corporate site and an in-house CRM at the edge, with privacy as a requirement A creative holding's website with an admin panel, secret-link proposals and invoices A product and project management office, with concurrent editing and no lost work	Sep 2026
MySQL and MariaDB	moderate	A national confederation's member system, modernized with the legacy still live	Sep 2026
PostgreSQL	strong	A study platform with payments, access control and timed exams A security review of the business logic of my own system A multi-company onboarding platform with isolation in the database	Sep 2026
Prisma	strong	A study platform with payments, access control and timed exams Exam intelligence that shows its math	Sep 2026
Redis	moderate	A study platform with payments, access control and timed exams	Sep 2026
Supabase (Auth, RLS, Storage)	strong	A multi-company onboarding platform with isolation in the database A luxury vehicle and asset registry, from editorial site to sales console Media Archive: a catalog and personal list of films, series and anime	Sep 2026

Authentication and access

Technology	Evidence level	Where	Last used
Auth.js with mandatory TOTP 2FA	strong	A study platform with payments, access control and timed exams	Sep 2026
Custom authentication (modern hashing, opaque sessions, roles, audit trail)	strong	A creative holding's website with an admin panel, secret-link proposals and invoices A corporate site and an in-house CRM at the edge, with privacy as a requirement A product and project management office, with concurrent editing and no lost work	Sep 2026
Multi-tenant isolation with RLS	strong	A multi-company onboarding platform with isolation in the database A security review of the business logic of my own system	Sep 2026

Infrastructure and delivery

Technology	Evidence level	Where	Last used
Cloudflare Workers (D1, R2, KV)	strong	A corporate site and an in-house CRM at the edge, with privacy as a requirement A creative holding's website with an admin panel, secret-link proposals and invoices A product and project management office, with concurrent editing and no lost work	Sep 2026
Docker and Compose	moderate	A national confederation's member system, modernized with the legacy still live	Sep 2026
Gated deploys and migrations (backup, verification, rollback)	strong	A national confederation's member system, modernized with the legacy still live	Sep 2026
GitHub Actions	strong	A study platform with payments, access control and timed exams A national confederation's member system, modernized with the legacy still live A question pipeline with style measurement and an acceptance gate This site	Sep 2026
Vercel	strong	A study platform with payments, access control and timed exams A multi-company onboarding platform with isolation in the database This site	Sep 2026

Testing

Technology	Evidence level	Where	Last used
Playwright	moderate	A multi-company onboarding platform with isolation in the database A high-end tourism portal prototype, with a data contract ready for the back end A study platform with payments, access control and timed exams This site	Sep 2026
Security tests (isolation, role escalation, CSP, concurrency)	strong	A multi-company onboarding platform with isolation in the database A security review of the business logic of my own system A national confederation's member system, modernized with the legacy still live	Sep 2026
Vitest	strong	A study platform with payments, access control and timed exams A security review of the business logic of my own system A multi-company onboarding platform with isolation in the database A corporate site and an in-house CRM at the edge, with privacy as a requirement This site	Sep 2026

AI in the product

Technology	Evidence level	Where	Last used
LLM in the product with validated output and a spend cap	strong	A study platform with payments, access control and timed exams	Sep 2026

Security

Technology	Evidence level	Where	Last used
CSP and security headers	strong	A study platform with payments, access control and timed exams A creative holding's website with an admin panel, secret-link proposals and invoices This site	Sep 2026
Business-logic security review	moderate	A security review of the business logic of my own system	Sep 2026
Pentest methodology (PTES, OWASP WSTG, NIST SP 800-115)Being studied. No lab execution recorded here yet.	weak	—	Sep 2026
Privacy and LGPD in engineering	moderate	A corporate site and an in-house CRM at the edge, with privacy as a requirement A national confederation's member system, modernized with the legacy still live A study platform with payments, access control and timed exams	Sep 2026
Criticality-based rate limiting	strong	A study platform with payments, access control and timed exams	Sep 2026

Process

Technology	Evidence level	Where	Last used
Architecture decision records	strong	A multi-company onboarding platform with isolation in the database A national confederation's member system, modernized with the legacy still live A study platform with payments, access control and timed exams This site	Sep 2026
Runbooks and operations docs	strong	A national confederation's member system, modernized with the legacy still live A corporate site and an in-house CRM at the edge, with privacy as a requirement	Sep 2026

Professional experience (no public repository here)

Technologies I used in past work. Each row links to the role in my career, not to a repository on this site.

Technology	Evidence level	Where	Last used
Angular	professional	.NET developer · Software house (federal government systems) Trainee · Trainee program	Apr 2024
Azure DevOps	professional	.NET developer · Software house (federal government systems)	Apr 2024
C#	professional	.NET developer · Software house (federal government systems)	Apr 2024
Dapper	professional	.NET developer · Software house (federal government systems)	Apr 2024
.NET and ASP.NET	professional	.NET developer · Software house (federal government systems)	Apr 2024
Elasticsearch	professional	.NET developer · Software house (federal government systems)	Apr 2024
Entity Framework	professional	.NET developer · Software house (federal government systems)	Apr 2024
Java	professional	Trainee · Trainee program	Oct 2022
Spring Boot	professional	Trainee · Trainee program	Oct 2022
SQL Server	professional	.NET developer · Software house (federal government systems) Scrum Master · Software house (federal government systems)	Dec 2025
Vue.js	professional	Software engineer and DBA (freelance) · National professional association	Sep 2026