eos.xavier / sre

Campo Grande, Brazil · UTC−4 · running production since 2025

Production should be boring.
Evidence should be reproducible.

I’m Eos Xavier, Site Reliability Engineer at Seazone and software engineering researcher at LEDES / UFMS. I operate AWS and Kubernetes/EKS workloads in production, standardize CI/CD and security gates, and publish open-source tooling where reproducibility is enforced by the pipeline, not promised in the README.

NOW SRE @ Seazone RESEARCH LEDES / UFMS · 2025–26 PAPERS SBBD · SBES · VEM 2026 THIS PAGE monitors itself ↓
EKS MIGRATIONS IN PRODUCTION●SAST GATES ON EVERY PR●DELTA = 0.0 REPRODUCIBILITY●SBBD 2026 · LEAD AUTHOR●SBES 2026 · TOOLS TRACK●VEM 2026 · BRANCHING ECHOES●LIVE AT CAPES SINCE 2026-06●AWS CERTIFIED●2× INPI-REGISTERED SOFTWARE●RUNNING PRODUCTION SINCE 2025-08●NO FRAMEWORKS · NO TRACKERS●
Production

What I run day to day at Seazone

since 2025-08

AWS + EKS operations

Availability, deployment safety and capacity for production workloads; application migrations to Amazon EKS including CI/CD, DNS and runtime configuration.

CI/CD & security gates

Standardized GitHub Actions pipelines across engineering repositories, with SAST quality gates wired into every pull request.

Self-service platform tooling

AI-assisted internal consoles that give product teams safe, scoped access to deployments, logs, rollbacks and environment variables, instead of tickets to the SRE queue.

Incident response & RCA

Triage and root-cause investigation that correlates monitoring, deployment and repository context; the repetitive diagnostic steps get automated away.

Most of this work lives in a private company org. I’m glad to walk through the architecture and the trade-offs over a call.

Deploy log

Career, as the system saw it

tail -f career.log
DateEventReferenceDetailStatus
2026PAPERvem-2026/branching-echoesaccepted · cbsoft workshop · second authorok
2026PAPERsbes-2026/pbi-gridaccepted · tools track · second authorok
2026PAPERsbbd-2026/rampartaccepted · lead author · best-short-papers sessionok
2026-06RELEASEcapes/agenda-nacionalpbi-grid live in production, gov.brok
2026-01PROMOTEseazone/sreintern → junior site reliability engineerok
2025GRADUATEufms/software-engineeringb.sc. · federal university of mato grosso do sulok
2025-08DEPLOYseazone/sre-internmonitoring · capacity · cloud cost · incidentsok
2025-01DEPLOYledes-ufms/researchledes/ufms research beginsok
2024-12CERTaws/cloud-practitionervalid through 2027-12ok
2024-08DEPLOYcompass-uol/data-engpython · spark · glue · athenaok
Research & open source

Reliability thinking, applied to tooling

3 accepted papers

SBBD 2026 · lead author · best-short-papers session

Rampart

Reproducible benchmarking of data processing paradigms: DuckDB, Polars and Dask processing the same data and models, with automated anti-leakage verification.

  • ETL integrity validated by requiring bitwise-identical predictions across engines: Δ must equal exactly 0.0
  • Hashed data snapshots separate upstream data revisions from code changes
  • Pinned Docker digests and explicit core budgets: every published latency is conditional on a recorded environment
  • Demonstrated on Brazilian municipal school-dropout prediction (INEP + World Bank, 2007–2024)
Repository
Delta equals zero point zero: bitwise-identical predictions, or the pipeline fails
duckdb · polars · dask
yaml in → deterministic 12-column pbir out

SBES 2026 · tools track · in production

PBI Grid

Dashboard-as-Code for Power BI: declarative YAML layouts compiled into PBIR reports by a deterministic 12-column grid engine, with design-token theming and a govBR reference package.

  • Git-versioned, reproducible dashboards with CI/CD integration: IaC principles applied to BI
  • Powers the CAPES Agenda Nacional public dashboard, live since June 2026
  • Archived release with DOI on Zenodo
Repository Live at CAPES Demo video DOI

VEM 2026 · CBSoft · second author

Branching Echoes: Exploring Branching Models as Sociotechnical Lenses for Community Smells

An exploratory case study reading branching-model evidence as a proxy for community smells in an ML-based system: coordination problems, fragmented ownership and delayed integration, surfaced from the branch graph itself.

Accepted papers ↗
Bench notes

Smaller work I keep around

DateTypeReferenceDetailStatus
2026-04REGISTERinpi/farmvet-v3.0software registration BR512026002405-6 · held by ufmsok
2026-03STUDYtheycelz/copilot-sprint-reviewcopilot × code review · 95% merge-time cut · mann-whitney u · cohen’s dok
2025-10REGISTERinpi/aves-pantanal-v2.0software registration BR512025004894-7 · held by ufmsok
2025PRODUCTufms/farmvet + aves-pantanaldevops & qa for real users · docker · ci/cd · release reliabilityok
2024PIPELINEcompass-uol/aws-etlpython · spark · glue · athena over data lakes · partitioning + query optimizationok
Runbook

Standing orders I work by

RUNBOOK.md · rev 2026
§1

Boring is a feature.

Excitement in production is unpaid incident review. The goal is systems so predictable that the interesting work happens on purpose, during business hours.

§2

If it isn’t reproducible, it didn’t happen.

Pin the digest, hash the snapshot, record the environment. A result you can’t regenerate is an anecdote. This applies to benchmarks and incident timelines alike.

§3

Automate the third repetition.

Once is an event. Twice is a pattern. Three times is a script with an owner, a log line and an alert.

§4

Blameless, but not causeless.

Post-mortems name systems, not people, and they always name something. “Human error” is where the investigation starts, never where it ends.

§5

Self-service beats gatekeeping.

Every ticket to the SRE queue is a platform gap. The best access control is a paved road with guardrails, not a person saying no.

Stack

Inventory

tiers are honest
operate daily
AWS · EKS · ECR · SSMKubernetesHelmArgoCD / GitOpsGitHub ActionsDockerGrafana · Prometheus · LokiCloudflare DNS · CloudFrontPythonBash
used in anger
AWS LambdaSAST pipelinesSpark · Glue · AthenaDuckDB · Polars · DaskSQLkubeconform
background
Empirical methods: Mann-Whitney U · Cohen’s dLaTeX

Honest tiering: anything in row one, ask me about it and expect a real answer.

Signals

Credentials, one line each

SBBD 2026 · lead author, Rampart SBES 2026 · Tools Track, PBI Grid VEM 2026 · Branching Echoes AWS Certified Cloud Practitioner · 2024–2027 INPI · 2 registered software products B.Sc. Software Engineering · UFMS · 2025 PT native · EN working proficiency