# Diego Vieira Gonçalves de Souza, AI Engineer

> 4 years of software engineering, 2 in generative AI, shipping production agents. Remote, from Crato, CE, Brazil · Remote. Every project number on this site links to the saved run that produced it.

## Pages
- [Home](https://diego-portfolio-ai.pages.dev/)
- [Live demo](https://diego-portfolio-ai.pages.dev/demo/)
- [Evidence](https://diego-portfolio-ai.pages.dev/evidence/)
- [Method](https://diego-portfolio-ai.pages.dev/method/)
- [Experience](https://diego-portfolio-ai.pages.dev/experience/)

## Projects
- [SupportOps](https://diego-portfolio-ai.pages.dev/projects/supportops/): A support platform where AI can draft a refund, but only a second person can approve it. Code: https://github.com/DiegoVSouza/supportops-platform
- [Foundation and live evals](https://diego-portfolio-ai.pages.dev/projects/foundation/): The contracts every project shares, and the evaluation that told me my agent was not ready. Code: https://github.com/DiegoVSouza/supportops-foundation
- [Multi-agent orchestration](https://diego-portfolio-ai.pages.dev/projects/agents/): Multi-agent triage with a bounded loop, compared across frameworks on the same contract. Code: https://github.com/DiegoVSouza/supportops-agents
- [Production AI toolkit](https://diego-portfolio-ai.pages.dev/projects/toolkit/): The boring safety layer that keeps an agent from hurting production. Code: https://github.com/DiegoVSouza/supportops-ai-toolkit
- [Agent observability](https://diego-portfolio-ai.pages.dev/projects/observability/): See what an agent did without storing what users said. Code: https://github.com/DiegoVSouza/supportops-observability
- [Durable async workflows](https://diego-portfolio-ai.pages.dev/projects/async/): Agent work that survives a worker dying mid-task. Code: https://github.com/DiegoVSouza/supportops-async
- [This site and its design system](https://diego-portfolio-ai.pages.dev/projects/design-system/): A design system with contrast checked by tests, and a site that refuses unproven numbers. Code: https://github.com/DiegoVSouza/diego-portfolio-ai
- [The engineering harness](https://diego-portfolio-ai.pages.dev/projects/harness/): The engineering system that built all of the above with coding agents. Code: https://github.com/DiegoVSouza/ai-engineer-lab

## Evidence
- Unique cases that passed all three trials: 9 of 12 (live, commit 09d8c1e) https://github.com/DiegoVSouza/supportops-foundation/blob/09d8c1ec6c0efc9a57d65ca86e8c7c5fe4396d6a/artifacts/evals/live/free-dev-c2r1/report.json
- Failures by family in the development campaign: classification 3, routing 6, tool selection 3 (live, commit 09d8c1e) https://github.com/DiegoVSouza/supportops-foundation/blob/09d8c1ec6c0efc9a57d65ca86e8c7c5fe4396d6a/artifacts/evals/live/free-dev-c2r1/report.json
- Protected evaluation budget: 84 held-out calls and 60 confirmation calls stayed reserved (live, commit 6b84f9a) https://github.com/DiegoVSouza/supportops-foundation/blob/6b84f9aeed126519671d5e5066bafc0b46ce95c4/docs/harness/progress.md
- Real-model trials passed (development set): 27 of 36 (live, commit 09d8c1e) https://github.com/DiegoVSouza/supportops-foundation/blob/09d8c1ec6c0efc9a57d65ca86e8c7c5fe4396d6a/artifacts/evals/live/free-dev-c2r1/report.json
- Wilson 95% interval for the all-three pass rate: 0.47 to 0.91 (Wilson, 95%) (live, commit 09d8c1e) https://github.com/DiegoVSouza/supportops-foundation/blob/09d8c1ec6c0efc9a57d65ca86e8c7c5fe4396d6a/artifacts/evals/live/free-dev-c2r1/report.json
- One live synthetic workflow, four provider attempts (tokens): 1274 in, 261 out (live, commit 6c8e06d) https://github.com/DiegoVSouza/supportops-agents/blob/6c8e06d885b80437ba4ebad293aa9659485adc16/docs/harness/progress.md
- Locked fake gate: 82 unit tests plus fixture and adversarial checks (fake, commit 5b91e73) https://github.com/DiegoVSouza/supportops-ai-toolkit/blob/5b91e7349a22298a08b073644195f005e42a4a53/.planning/phases/016-accounted-local-operation/VERIFY.md
- Full fake service gate: 70 tests, service traces, a dashboard and four firing alerts (service, commit 83fe067) https://github.com/DiegoVSouza/supportops-observability/blob/83fe06752d4823c4af4843f66417542642e0f2c9/.planning/phases/025-accounted-local-live/VERIFY.md
- Isolated full fake gate: 127 tests, locked service scenarios, image build and Terraform plan (service, commit d3e694d) https://github.com/DiegoVSouza/supportops-async/blob/d3e694d64902d41d1409f6f79e4ef0687143a56b/.planning/phases/043-root-snapshot-gate/VERIFY.md
- demo-live-v1 ledger and failover tests against PostgreSQL 16: 17 passed (service, commit ffcdb81) https://github.com/DiegoVSouza/supportops-platform/blob/ffcdb81a301968a8fa0a6f68ed81d4c6fb651a4f/artifacts/evidence/demo-live-v1/pytest-demo-live-postgres.txt
- Requester cannot approve their own refund; a tenant cannot read another tenant's ticket: 2 passed (fake, commit 6e51483) https://github.com/DiegoVSouza/supportops-platform/blob/6e51483b6b4c6f35e4b3f988e8d5e097a9a85383/artifacts/evidence/portfolio-w7/dual-control-tests.txt
- P05 test suite at phase 033: 179 tests passed (fake, commit d859a50) https://github.com/DiegoVSouza/supportops-platform/blob/d859a5058b27bbef469644429b5f934f38f87d28/.planning/phases/033-console-blockers/VERIFY.md

## Contact
- WhatsApp: https://wa.me/5588997974229
- Phone: +55 88 99797-4229
- Email: dvsdiegovieira@gmail.com
- LinkedIn: https://www.linkedin.com/in/diegovsouza99
- GitHub: https://github.com/DiegoVSouza