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AI AUGMENTED ENGINEER? signature

AI engineer shipping LLM-powered features, agent pipelines, and the interfaces that put them to work.

São José dos Campos, SP · 2025
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AI Engineering
How I Work

AI COMMODITIZED TYPING.
IT DID NOT COMMODITIZE ENGINEERING.

01

The engineer owns the thinking.

Understanding the problem. Exploring the solution space. Choosing the architecture. Weighing performance and cost. Designing the guardrails that catch regressions before users do. None of that gets delegated. AI accelerates the keystrokes, not the judgment.

02

Hidden decision debt is real.

Skipped judgment surfaces later as spec drift, performance regressions, and untraceable bugs. I keep decisions explicit so the debt stays visible.

03

Coherent output ≠ correct output.

LLMs are probabilistic compilers — they optimize for coherence, not correctness. Verification is structural: tests, types, guardrails. Not vibe-based.

04

Workflow is method, not ritual.

The tools change. The agents change. The pipelines get renamed. What stays constant is who's accountable for the result.

The signature I sign on the work is the judgment behind it.
That's the part worth paying for.

Mini Map
AI-ASSISTED DELIVERY · WORKFLOW MAP

How I route work between agents, gates & judgement

From Jira intake to a gated merge — I architect who does what, not just hand it all to the model.

Highlight path
Who acts
AGENTAI does the work
HUMANYou decide / review
AUTOMATEDCI & tooling
01

TRIAGE

Intake & routing

  1. AUTOMATED

    Pull from Jira

    Dev-ready tickets flow into the queue.

    jira API
  2. AGENT

    Read session-handoff.md

    Restore full context per active worktree.

    worktree
  3. AGENT

    Classify complexity

    Route each ticket — simple vs. intermediate.

  4. SYSTEM

    Prioritized queue

    Ordered & ready — fork by complexity.

02

EXECUTION

Two paths, by complexity

  1. HUMAN

    Scope the change

    Quick alignment on intent and approach.

  2. AGENT

    Implement → PR

    Agent codes the change and opens a pull request.

  3. HUMAN

    Template + system design

    You architect the approach before any code.

  4. AGENT

    Taskify → isolated worktree

    Break into tasks; spin up a clean worktree.

    git worktree
  5. AGENT

    Sub-agents per phase

    Phase-scoped agents write code against AC tests.

    sub-agentsAC tests
  6. AGENT

    Agent review → manual validation

    Self-review pass, then you sanity-check.

  7. HUMAN

    Human review

    Final read before anything can merge.

  8. AUTOMATED GATE

    Guard rails CI

    Any PR that regresses a metric gets automatic feedback — before it reaches human review.

    jscpdeslint-plugin-sonarjsknip
  9. MILESTONE

    Merge to main

    Gated, reviewed, green.

03

CLOSING

Merge, teardown & capture

  1. AUTOMATED

    Done

    Remove handoff + tear down the worktree.

  2. AGENT

    Still in progress

    Write session-handoff.md for the next run.

  3. SESSION

    Vault Session

    Capture the key decisions.

  4. SESSION

    Wrap-Up Session

    Process improvements.

  5. SESSION

    Learnings

    Technical takeaways.

↻ next run

Case Studies

Products I've
built & shipped

Each project documents not just what was built — but why. The tradeoffs, constraints, and decisions behind it.

Skills & Resume

WHAT I WORK WITH

Full Stack
Frontend
Re React
TS TypeScript
N↗ Next.js
Vi Vite
Rx Redux / Zustand
TQ TanStack Query
React Hook Form
Zd Zod
TW Tailwind
UI shadcn/ui
Testing
Jt Jest
Cy Cypress
Vi Vitest
TL Testing Library
Backend & Infra
No Node.js
Py Python
FA FastAPI
Pg PostgreSQL
Pr Prisma
Rd Redis
St Stripe
🐳 Docker
SB Supabase
AI / LLM
Claude API
An Anthropic SDK
PE Prompt Engineering
SO Structured AI Output
RG RAG Pipelines
Em Embeddings
Pv pgvector
CC Claude Code
Cu Cursor
V0 V0
Languages
Portuguese Native
English Fluent
French Advanced
Need the formal doc? Full Profile — PDF Jhéssiny Mattos · Updated 2026
CONTACT.OPEN

LET'S BUILD
SOMETHING WORTH SHIPPING.

~/josm $ ./reach-out --to=you
Primary channel · Email jhessinymattos@gmail.com Send
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