Senior Backend Engineer specializing in Go, gRPC, and distributed systems. Currently building scalable platforms at SWORD Health.https://leogsouza.dev/https://leogsouza.dev/projects/common-concurrency-bugs-in-go/https://leogsouza.dev/projects/common-concurrency-bugs-in-go/The concurrency bugs I still see in Go codebases — data races, leaked goroutines, channel mistakes — and how to catch them before production.Thu, 20 Aug 2026 00:00:00 GMThttps://leogsouza.dev/projects/escape-analysis-in-go-what-actually-matters/https://leogsouza.dev/projects/escape-analysis-in-go-what-actually-matters/A practical look at escape analysis — when allocations move to the heap, how to see it, and when it is worth caring about.Thu, 20 Aug 2026 00:00:00 GMThttps://leogsouza.dev/projects/working-with-databases-in-go/https://leogsouza.dev/projects/working-with-databases-in-go/How I use database/sql and pgx in production — connections, context, transactions, scanning, and the mistakes that show up after traffic increases.Thu, 20 Aug 2026 00:00:00 GMThttps://leogsouza.dev/projects/building-a-grpc-service-in-go/https://leogsouza.dev/projects/building-a-grpc-service-in-go/A practical introduction to building high-performance gRPC services in Go — from defining the contract to implementing the server and client.Sat, 08 Aug 2026 00:00:00 GMThttps://leogsouza.dev/projects/graceful-shutdown-in-go/https://leogsouza.dev/projects/graceful-shutdown-in-go/How to shut down Go services cleanly — draining connections, finishing in-flight work, and avoiding the common traps that show up in production.Sat, 08 Aug 2026 00:00:00 GMThttps://leogsouza.dev/projects/mastering-concurrency-in-go-goroutines-and-channels/https://leogsouza.dev/projects/mastering-concurrency-in-go-goroutines-and-channels/A practical deep dive into Go's concurrency model — goroutines, channels, and the select statement — with real-world patterns every backend engineer should know.Sat, 08 Aug 2026 00:00:00 GMThttps://leogsouza.dev/projects/mastering-structs-methods-and-interfaces-in-go/https://leogsouza.dev/projects/mastering-structs-methods-and-interfaces-in-go/Learn how to model data and behavior in Go using structs, methods, and interfaces — the foundation of clean and idiomatic Go code.Sat, 08 Aug 2026 00:00:00 GMThttps://leogsouza.dev/projects/profiling-go-programs-with-pprof/https://leogsouza.dev/projects/profiling-go-programs-with-pprof/A practical look at CPU, memory, and goroutine profiling in Go — how to collect profiles, read them, and avoid the usual mistakes when debugging performance.Sat, 08 Aug 2026 00:00:00 GMThttps://leogsouza.dev/projects/structured-logging-in-go/https://leogsouza.dev/projects/structured-logging-in-go/Why unstructured logs become a liability at scale, how to use slog effectively, and the practical conventions that make logs actually useful in production.Sat, 08 Aug 2026 00:00:00 GMThttps://leogsouza.dev/projects/table-driven-tests-and-testing-best-practices-in-go/https://leogsouza.dev/projects/table-driven-tests-and-testing-best-practices-in-go/Learn how to write clean, maintainable, and effective tests in Go using table-driven tests and other proven practices used by experienced backend engineers.Sat, 08 Aug 2026 00:00:00 GMThttps://leogsouza.dev/projects/the-context-package-explained/https://leogsouza.dev/projects/the-context-package-explained/A practical guide to Go's context package — cancellation, timeouts, deadlines, and request-scoped values that every backend engineer needs to master.Sat, 08 Aug 2026 00:00:00 GMThttps://leogsouza.dev/projects/auto-escala/https://leogsouza.dev/projects/auto-escala/Pure Go admin system for shift and schedule management, with server-rendered UITue, 26 May 2026 00:00:00 GMThttps://leogsouza.dev/projects/escala-voluntarios/https://leogsouza.dev/projects/escala-voluntarios/Volunteer scheduling platform for church services — Go API + Next.jsMon, 05 Jan 2026 00:00:00 GMThttps://leogsouza.dev/projects/mastering-data-structures-in-go-arrays-slices-and-maps-explained/https://leogsouza.dev/projects/mastering-data-structures-in-go-arrays-slices-and-maps-explained/Sat, 14 Sep 2024 14:20:00 GMThttps://leogsouza.dev/projects/mastering-error-handling-in-go/https://leogsouza.dev/projects/mastering-error-handling-in-go/Mon, 09 Sep 2024 13:24:00 GMThttps://leogsouza.dev/projects/mastering-functions-in-go-a-deep-dive/https://leogsouza.dev/projects/mastering-functions-in-go-a-deep-dive/Fri, 06 Sep 2024 22:50:00 GMThttps://leogsouza.dev/projects/mastering-control-structures-in-go/https://leogsouza.dev/projects/mastering-control-structures-in-go/Learn about if-else switch conditionals and for loopsWed, 04 Sep 2024 10:29:00 GMThttps://leogsouza.dev/projects/variables-and-data-types/https://leogsouza.dev/projects/variables-and-data-types/Diving into Variables and Data TypesTue, 03 Sep 2024 16:03:00 GMThttps://leogsouza.dev/projects/go-program-syntax-and-structure/https://leogsouza.dev/projects/go-program-syntax-and-structure/Let's dive into the Go basicsTue, 03 Sep 2024 10:03:00 GMThttps://leogsouza.dev/projects/get-started-go/https://leogsouza.dev/projects/get-started-go/Let's start your Go journeyMon, 02 Sep 2024 00:00:00 GMThttps://leogsouza.dev/projects/why-go/https://leogsouza.dev/projects/why-go/Why use Go when you have many programming languages?Sun, 01 Sep 2024 13:30:00 GMThttps://leogsouza.dev/projects/i-am-back/https://leogsouza.dev/projects/i-am-back/Sun, 01 Sep 2024 11:30:00 GMThttps://leogsouza.dev/projects/mastering-go-understanding-pointers-and-memory-management/https://leogsouza.dev/projects/mastering-go-understanding-pointers-and-memory-management/Sun, 01 Sep 2024 09:50:00 GMThttps://leogsouza.dev/projects/superfin/https://leogsouza.dev/projects/superfin/Fintech-style application built with GoWed, 28 Aug 2024 00:00:00 GMThttps://leogsouza.dev/projects/bookstore-api/https://leogsouza.dev/projects/bookstore-api/Clean REST API example written in GoMon, 19 Aug 2024 00:00:00 GMThttps://leogsouza.dev/projects/new-website/https://leogsouza.dev/projects/new-website/Writing to improve my skillsWed, 03 Jul 2024 00:00:00 GMThttps://leogsouza.dev/projects/banking-app/https://leogsouza.dev/projects/banking-app/A banking web app built with Next.jsFri, 24 May 2024 00:00:00 GMThttps://leogsouza.dev/projects/meower/https://leogsouza.dev/projects/meower/Microservices demo with search, real-time updates, and event-driven architectureWed, 22 May 2019 00:00:00 GMT