John Callaghan

person 8 connections

Ruby on Rails engineer with 15 years of experience. At the time of the talk works at BiggerPockets, soon moving to Dynatrace to develop a Ruby client. Recognized in the community as an observability expert. Has delivered a workshop on logging and tracing earlier in 2025 in Kraków and writes articles and videos shared via a link-tree QR code.

rails_experience_years

person John Callaghan

attended

wroclove.rb 2025 event

Delivered the talk and took questions; noted he was leaving at 4pm to catch a flight.

person John Callaghan

authored

Fix Production Bugs 20 Times Faster talk

Callaghan is the sole speaker for this talk.

person John Callaghan

recommends

Semantic Logger tool

Evaluates logging libraries against criteria and recommends semantic_logger.

person John Callaghan

recommends

OpenTelemetry Semantic Conventions concept

Recommends adopting OTel semantic conventions even without the SDK.

person John Callaghan

recommends

Structured Logging concept

Core advocacy of the talk: structured over plain logs.

person John Callaghan

recommends

Faraday tool

Jokingly endorses Faraday as the best Ruby HTTP client while demonstrating logging middleware.

person John Callaghan

works_at

BiggerPockets company

Rails engineer at BiggerPockets at the time of the talk; all production stories are from there.

role: engineer

person John Callaghan

works_at

Dynatrace company

Joining Dynatrace after BiggerPockets to develop a Ruby agent/client.

role: Ruby agent developer status: upcoming

Provenance

Created in: Fix Production Bugs 20× Faster with Structured Logging — ... 2026-04-18 07:42
Read by: 2 extractions