Est. 2020
ImpulsoLeadArtificial Intelligence & Platform Engineering
Alex DE SOUZA
Chief Technology Officer
Aveiro, Portugal · contact@alexsouza.dev · github AlexSouzaDev
Open to senior AI & full-stack engineering workLLM systems · multi-agent orchestration · B2B SaaS
01 — Index
Selected work5 entries
- 2025 — Present
ImpulsoLead
B2B AI SaaS · CTO
Multi-tenant B2B SaaS for the Brazilian real-estate market, architected end to end (Next.js App Router, tRPC, Prisma, PostgreSQL). I designed a LangGraph + Claude agent layer spanning 11 task types for lead analysis, response generation, and campaign automation.
- 2026
CRAFT
LLM research · Python
Causal Rationale Attribution Faithfulness Test — an open-source library that empirically checks whether an LLM agent’s stated reasoning actually drove its decision, using a randomized perturbation experiment with a placebo control. Zero runtime deps, mypy-clean, CI-ready CLI.
- 2026
red-agent
AI safety · TypeScript
Adversarial stress-test harness that injects YAML-defined attacks into tool-using LLM agents and uses a Claude LLM-judge to classify compromise vs. safe refusal vs. detection. Covers 3 victim models, 5 attack categories, and 4 safety metrics, persisted via Prisma with a Next.js dashboard.
- 2026
treeport
Dev tooling · Python
Production CLI/library that runs AI coding agents (Claude Code, Aider, GPT-4o, Gemini) inside isolated Docker containers backed by git worktrees, then fast-forward merges the results. asyncio + Pydantic v2 + Typer, 5 backends, 48 passing tests.
- 2026
CADRE
Multi-agent security · Python
Multi-agent SIEM testing whether LangGraph-orchestrated agents beat a monolithic LLM on threat-detection accuracy and cost. Ingests real intrusion datasets (CIC-IDS2017, UNSW-NB15), streams events over Redis, and gates response actions behind a tRPC human-approval UI.
02 — Practice
Product judgment and hands-on technical ownership, in the same person.
Product & architecture
Engineering judgment, not ticket-level execution.
I turn unclear product ambition into system architecture and a shipping cadence that compounds. At ImpulsoLead I architected a multi-tenant B2B SaaS end to end and grew into the CTO seat.
Full-stack systems
Type-safe interfaces, resilient backends, and the operational spine underneath.
Next.js and tRPC on the front, FastAPI and async pipelines on BullMQ + Redis behind them. I care about speed, maintainability, and leverage in equal measure.
AI & LLM systems
Models earn their place when they sharpen the workflow.
I design multi-agent orchestration with LangGraph and the Claude SDK, RAG with pgvector, and the evaluation harnesses — faithfulness, safety, red-teaming — that keep them honest in production.
03 — Record
Built through repetitionCoding since 2020
- 2020
Started coding with a bias toward shipping
Moved quickly from fundamentals into real builds, learning by putting work under pressure instead of leaving it in tutorial mode.
- 2022
Freelance software developer
Solo-delivered websites, full-stack apps, and REST APIs for local businesses and research projects across TypeScript, Python, PHP, and C# — from requirements through deployment and maintenance.
- 2023
Computer programming at Universidade de Aveiro
Technical higher education (CTeSP) at ESTGA — systems & network programming, network security, algorithms, discrete mathematics, and databases.
- 2025
Joined ImpulsoLead as founding engineer
Architected a multi-tenant B2B SaaS for the Brazilian real-estate market end to end — Next.js App Router, tRPC, Prisma, and PostgreSQL.
- Now
Promoted to CTO within six months
Owning architecture, AI strategy, and infrastructure — including a LangGraph + Claude agent orchestration layer spanning 11 task types, on an async BullMQ + Redis pipeline.
04 — Figures
The count, so far.
7
Professional certifications across AI, security, and systems
11
AI agent task types orchestrated in production at ImpulsoLead
15+
Projects shipped across web, AI, ML, and systems
05 — Reply
When the brief is ambitious, the build should be too.
Enquiries welcome for
- Senior or lead AI / full-stack engineering roles
- Product partnerships where engineering quality changes the outcome
- Selective freelance work with clear scope and meaningful ambition
Clear scope beats vague hype. Send context and I will read it properly.
Aveiro, Portugal · replies within two days