Location: Paraguay
Contact: +595961178540 | padiazg@gmail.com
Links: LinkedIn | GitHub | Blog

Profile Summary

Go developer and open-source maintainer with a track record of building tools the Go community actually uses. Specialized in taking ambiguous or AI-generated (“vibe-coded”) codebases and turning them into tested, maintainable systems — raising coverage, cutting cyclomatic complexity, and enforcing clean-architecture practices. Comfortable owning a project end-to-end, from first commit through production, with a habit of solid code review and mentoring that sticks after the handoff.

Available for immediate remote opportunities globally.

Expertise Highlights

Languages: Go (Golang), JavaScript, TypeScript, Node.js, Python, PHP, Java
Architecture: Domain-Driven Design, Event-Driven Architecture, CQRS, Event Sourcing, Hexagonal / Ports & Adapters, Microservices, Serverless (FaaS)
Cloud & DevOps: Google Cloud Platform (GCP), AWS (Lambda, EC2, API Gateway, Aurora, EventBridge, Secrets Manager), Docker, Kubernetes, Terraform, CI/CD, LocalStack
Messaging & APIs: NATS JetStream, AMQP, MQTT, gRPC, REST, GraphQL, WebSockets
Databases: PostgreSQL, MySQL/MariaDB, MongoDB, Redis, InfluxDB, Oracle, IBM DB2
Identity & Auth: OAuth2/OIDC, JWT, RBAC, multi-tenant access control, Authentik
Observability: Prometheus, Grafana, Fluentd, OpenTelemetry
Frameworks: React, Vue.js, GORM, QOR, Echo, Gin, Chi, Fiber
Testing & Quality: Unit / E2E / mutation testing, static analysis (go/packages), CRAP score analysis

Key Professional Experience

Senior Software Engineer

SEGEL SI | June 2025 - Feb 2026

Highlight: IoT data pipeline, payment gateway, and enterprise technology modernization. Designed a zero-dependency Go library for BLE IoT sensor payload decoding, built a real-time hexagonal IoT pipeline (MQTT ingestion → concurrent worker pool → InfluxDB with exponential-backoff retry, 12 Prometheus metrics), and led development of POSsible Payments, a cloud-native payment system covering the full transaction lifecycle (authorization → batching → clearing → settlement) with CQRS, Event Sourcing, and NATS JetStream, plus OAuth2/OIDC with RBAC-based multi-tenant merchant isolation via Authentik and a Prometheus/Grafana/Fluentd observability stack

Technical Lead — Golang Backend

AR Santex LLC (Client Project) | Jun 2025 - Oct 2025 (4 month project)

Highlight: Cross-border financial integration between Argentinian digital wallet and Chilean banking institution. Led a 3-engineer team delivering a scalable integration platform end-to-end on a serverless AWS architecture (Lambda, API Gateway, Aurora, EventBridge, Secrets Manager) with a LocalStack + Docker + Kubernetes local dev environment; mentored 2 backend developers

Senior Software Engineer / Technical Lead

Tyk Technologies Ltd | Nov 2020 - May 2024

Highlight: Incubated the Enterprise Developer Portal from PoC to production-ready product, built the team from 1 dev to a full squad, and delivered 100% of the roadmap

DevOps Engineer / Full Stack Developer

On Campus Marketing | Oct 2019 - Sep 2020

Highlight: Integrated third-party platforms with the company's stack, developed critical features, and improved cloud resource usage on GCP

Senior IT Consultant

Vision Banco SAECA | May 2012 - Oct 2019

Highlight: Developed 3 mission-critical systems introducing cutting-edge technologies and implemented private cloud solutions for serverless functions

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Go Struct Analyzer

Role: Owner

GitHub

A VS Code extension to show memory size and padding information for Go structs, helping you optimize memory usage and understand struct layout. Published at [Visual Studio Code Marketplace](https://marketplace.visualstudio.com/items?itemName=PatricioDiaz.go-struct-analyzer) and [Open VSX Registry](https://open-vsx.org/extension/PatricioDiaz/go-struct-analyzer), featured at [The Applied Go Weekly Newsletter](https://newsletter.appliedgo.net/archive/2025-06-22-go-before-you-wait/)

HexaGo

Role: Owner

Docs | GitHub

An opinionated CLI scaffolding tool for Go developers building applications following the Hexagonal Architecture (Ports & Adapters) pattern. Automates project structure and component generation with support for multiple HTTP frameworks (stdlib, Echo, Gin, Chi, Fiber), component generators (services, domain entities, adapters, workers, database migrations), architecture compliance validation, and a multi-source customizable template system.

go-crap

Role: Owner

Docs | GitHub

CRAP score (Change Risk Anti-Pattern) calculator with mutation testing integration. Calculates cyclomatic complexity × coverage per function, flags CoverageUntrusted when go-gremlins mutations survive, and outputs SARIF 2.1.0 (IDE/GitHub Code Scanning), PR-comment, and text formats — the final guardrail ensuring AI-generated tests aren't just coverage theater.

go-testgen

Role: Owner

Docs | GitHub

A CLI tool to generate unit test scaffolding for Go projects. It produces closure-based check functions, a before hook for mock setup, and table-driven tests that compose cleanly as test suites grow.

test-finder

Role: Owner

GitHub

A CLI tool to discover Go modules and analyze their test coverage across directories.

unit-test-book

Role: Owner

Docs | GitHub

A hands-on guide to Go unit testing through real-world patterns extracted from 7 production Go projects. Covers table-driven tests, closure-check pattern, mocking, HTTP/I/O, concurrency, and integration testing.

codapi/sandboxes

Role: Contributor

GitHub

Contributed the LaTeX sandbox

go-oas/docs

Role: Contributor

GitHub

Auto-generate RESTful API documentation for GO projects aligned with Open API Specification

OpenFaaS

Role: Contributor

GitHub

Collaborated in early stages of this serverless framework for Kubernetes

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Speaking Engagements

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View All Education & certifications

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