Senior Software Engineer · Tech Lead · Solutions Architect · Niterói / Rio de Janeiro, Brazil
🌐 Engineering Hub & Showcase (PT-BR) | EN · 🧭 Trajectory & About (PT) · 📝 Engineering Blog (EN)
📱 pwE on Google Play (177 Countries) · 💼 LinkedIn (in/evslopes) · 𝕏 X / Twitter (@evslopes) · ✉️ contato@jhhsolutions.dev
🇺🇸 EN: Senior Software Engineer, Tech Lead, and Solutions Architect (Postgraduate in Software Architecture @ FIAP, Top MEC Grade 5 in Systems Analysis @ Instituto Infnet, CS & Mathematics foundation @ UERJ) combining 15+ years in IT & Operations — including 10+ years dedicated to mission-critical B2B platforms, Tier-3 SRE/RCA, Oracle DB SQL tuning, and Operational Data Engineering at Serasa Experian & BrScan Tecnologia — with 0-to-1 full-cycle product engineering at my independent studio, JHH Solutions (Flutter/Dart, Java 17+/Spring Boot 3, Cloud-Native GCP/AWS, P2P Streaming, and On-Device Edge AI).
🇧🇷 PT: Engenheiro de Software Sênior, Tech Lead e Arquiteto de Soluções (Pós-graduado em Software Architecture pela FIAP, Análise e Desenvolvimento de Sistemas Nota 5 MEC pelo Instituto Infnet e base em Ciência da Computação & Matemática pela UERJ), unindo 15+ anos de vivência em TI e Operações — sendo 10+ anos dedicados a sistemas corporativos B2B críticos, Sustentação N3 / SRE / RCA, tuning SQL em Oracle DB e Engenharia de Dados na Serasa Experian e BrScan Tecnologia — à concepção de produtos Full-Cycle no estúdio autoral JHH Solutions (Flutter/Dart, Java 17+/Spring Boot 3, GCP/AWS, Streaming P2P e IA On-Device).
| Project / Ecosystem | Architecture, Scale & Verification Metrics | Code, Releases & Case Studies |
|---|---|---|
pwE — Pray With Me (v1.0.24+200)(Global Production App — Google Play 177 Countries, iOS & Web) |
411 Dart files, 1,430+ tests (236 suites), 69 ADRs, 16 SDD specs, 99.07% Crash-Free · Clean Arch + DDD (8 features, 16 BLoCs, dartz Either), Dual Edge AI (Gemma 4 E2B via Kotlin JNI/Swift FFI on LiteRT-LM + 384d TFLite RAG), Dart AOT Worker on GCP Cloud Run + GCS Static CDN (>98% Firestore offload), AES-256-GCM zero-knowledge vault & 18-agent AI governance |
GitHub Showcase (20 Slices) · Google Play Store · 69 Interactive ADRs · Web App · Case Study |
BabeView — P2P Multi-Camera Hub (v0.2.0)(Real-Time WebRTC P2P, C/C++ RTSP & Procedural DSP) |
186 Dart files, 95 test suites, 12 ADRs, 4-Layer DDD + Riverpod 3 · Polymorphic IMediaSource unifying Full-Duplex WebRTC P2P (~30 ms) + RTSP/ONVIF IP cameras (C/C++ media_kit H.264/H.265), 4-Byte Big-Endian TCP signaling (>90 KB SDPs), Constant-Time XOR PIN, mDNS/ONVIF discovery & pure-Dart procedural 16-bit WAV synthesis (Pink/Brown/pentatonic crossfade) |
GitHub Showcase (27 Slices) · Release v0.2.0 · Case Study (PT) · Case Study (EN) |
SRE & Tier-3 Incident Intelligence Engine (v1.0.0)(Observability, Pareto 80/20 RCA & MAD Anomaly Engine) |
Clean-room open-source Python engine (Pandas, NumPy, Plotly, Dash, Gunicorn, Pytest, Docker) · 100% synthetic B2B telemetry (Zero NDA), Pareto 80/20 chronic signature isolation, right-skewed MTTA/MTTR percentiles (p50/p90/p95), Modified Z-Score (MAD) anomaly burst detection & standalone Six Sigma / CAB HTML executive storytelling reports |
GitHub Repo · Release v1.0.0 · Engine Case · Enterprise SRE Case |
Sinatra Mini — Analytics SaaS API (v1.1.0)(High-Throughput Java 17, Spring Boot 3.2 & K8s HPA) |
O(1)-memory CSV streaming (100k+ rows), O(N) single-pass scans, PostgreSQL 15 (Flyway V1–V11 composite indexes), hybrid L1 Caffeine + L2 Redis cache, Testcontainers (54 automated tests across unit/integration/load), non-root multi-stage Docker & Kubernetes HPA (RPO <= 5 min / RTO <= 15 min) |
GitHub Repo · Release v1.1.0 · Case Study (PT) · Case Study (EN) |
FIAP SOAT Cloud-Native Platform (29 Public Repos)(Distributed Microservices, SAGA & Terraform IaC) |
Java / Spring Boot autonomous microservices, Clean Architecture, SAGA patterns, polyglot persistence (PostgreSQL + AWS DynamoDB), reusable Terraform (HCL) modules, AWS EKS (Kubernetes HPA), AWS ECS & reusable GitHub Actions CI/CD pipelines | Core Repo · 29-Repo Org (soat1-grupo18) · Case Study |
| Credit Score Clean Arch API & Studio Line (Financial Domain Isolation, OLED Optics & Distributed Web) |
Java 17 + Spring Boot 3 + Spring Security pure Clean Architecture credit-scoring API, plus studio & distributed products: Ritmo da Família (Montessori 24h astronomical arc), Sleep O'Clock (75%–85% OLED APL reduction, 126+ tests) & Mãe da Prole (5 repos, 162 PRs, Spring Boot 3.2, Vue 3, Strapi, Terraform, Cypress & Kotlin MVVM) |
Score API Repo · Ritmo Case · Sleep O'Clock Case · MDP Android · MDP Infra Case |
- 🚀 From
flutter buildto Google Play Store: The Invisible Toll of Shipping an Independent App to Global Production (Ler em Português) — 14-tester Closed Testing gates, diagnosing a real Google Play Billing restore bug, i18n visual QA, and first-submission approval across 177 countries. - 📐 Behind the Scenes of pwE: 69 ADRs, 18 AI Agents, On-Device Gemma 4 & Serverless FinOps (Ler em Português) — Executable SDD governance, local LLM streaming via LiteRT-LM, and offloading >98% of database reads to GCS Static CDN.
- Architecture & Governance: Clean Architecture, Modular Domain-Driven Design (DDD), Microservices, SAGA Patterns, C4 Model, UML, BPMN, ADRs, Spec-Driven Development (SDD), Zero-Knowledge Security (
AES-256-GCM, Constant-Time Handshakes). - Backend, Mobile & Edge AI: Java 17+ (Spring Boot 3, JPA Streaming, Bean Validation, Spring Security), Flutter / Dart (
flutter_bloc,riverpod,go_router,get_it,dartz), Kotlin (JNI / MVVM / Room), Swift C FFI, Python (Pandas,NumPy,Plotly,Dash), Gemma 4 (LiteRT-LM), Offline Vector RAG (TFLite384d), WebRTC P2P, RTSP/ONVIF (media_kit), Procedural Audio DSP. - Cloud, SRE & DevOps: Google Cloud Platform (Cloud Run, GCS Static CDN, Firebase), AWS (EKS, ECS, DynamoDB, API Gateway), Kubernetes (HPA), Docker, Terraform (IaC), GitHub Actions (CI/CD), Tier-3 SRE & RCA, CAB/GMUD Governance, Six Sigma Yellow Belt, Langfuse (LLMOps), Serverless FinOps.
- Data & Persistence: Oracle DB (Execution Plan Diagnostics & High-Volume SQL Tuning), PostgreSQL (
Flyway, Composite Indexing), Redis & Caffeine Multi-Tier Caching, AWS DynamoDB, Cloud Firestore, Encrypted Hive (HiveAesCipher), PowerBI & Executive Data Storytelling.