Josué André da Silva Barros (Josh Barros)

Builder / Senior Software Engineer — Performance • Data Platforms • Event-driven Systems • Cloud (Azure + GCP)

I build fast web experiences, data pipelines, and event-driven backends that scale in production—focused on Core Web Vitals, reliability, and cost.

Keywords: React • Next.js • TypeScript • Java/Spring • Golang • Python/FastAPI • Redis • Kafka • Databricks/PySpark • Azure (ADF, ADLS, AKS) • GCP (Cloud Run, Pub/Sub, BigQuery) • Terraform • Kubernetes • Observability (OpenTelemetry, Prometheus, Grafana)

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What I ship

• Performance engineering (React/Next.js): Core Web Vitals, LCP/CLS/FID, render & bundle optimization
• Data engineering (Azure): ADF + ADLS Gen2 + Databricks/PySpark pipelines
• Event-driven systems: Kafka / RabbitMQ / Pub/Sub, idempotency, retries, durability
• Cloud + platform: AKS/GKE, Terraform IaC, CI/CD, secure secret management
• Observability by default: OpenTelemetry, Prometheus, Grafana, Loki, Jaeger, Sentry

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Proof (high-signal outcomes)

• 65% homepage render-time reduction on Sephora e-commerce (React performance + Core Web Vitals)
• Built Promotion Activation System powering personalized offers across web/mobile for peak campaigns
• 30%+ cost reduction on Azure data workloads (Databricks/ADF + FastAPI service + IaC)
• 40% MTTR reduction through dashboards/alerting (Prometheus + Grafana)
• Up to 60% API latency reduction using caching + performance tuning (Redis)
• 99.99% uptime experience in banking/regulated environments; zero security incidents reported

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Work (recent)

Stateside Agency (Sephora) — Software Engineer (Contract) • Los Angeles / Remote • 07/2025–11/2025
TRIAD Integration (CCR) — Data Engineer (Contract) • São Paulo / Remote • 11/2024–03/2025
Keyrus (SulAmérica) — Software Engineer (Contract) • 05/2024–11/2024
Xogito Group (NYC) — Software Engineer (Contract) • 10/2023–05/2024

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Stack (for humans + SEO)

Frontend: React, Next.js, Angular, TypeScript, Redux
Backend: Java, Spring Boot, Golang, Node.js, Python, FastAPI • REST, GraphQL, gRPC
Data: Databricks, PySpark, Airflow • PostgreSQL, MySQL, MongoDB, Redis
Cloud: Azure (ADF, Databricks, ADLS Gen2, Functions, App Service, AKS) • GCP (Cloud Run, Functions, Pub/Sub, BigQuery)
DevOps: Terraform, Docker, Kubernetes, GitHub Actions, Jenkins, NGINX, Traefik, CI/CD
Observability: OpenTelemetry, Prometheus, Grafana, Loki, Jaeger, Sentry

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Leadership & collaboration

• 1.5 years mentoring Mid/Junior devs
• Worked with multicultural teams across LATAM / NA / EMEA / APAC

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Connect

• Website: https://josuebarros.com
• Company: https://goldenglowitsolutions.com
• LinkedIn: https://linkedin.com/in/joshbarros
• Email: goldenglowitsolutions@gmail.com

Open to: Senior/Staff SWE • Performance • Data Platform • Backend • Cloud (Azure/GCP) • Consulting