Darren Geary

Software Engineer | Incident Response | Production Observability

Ireland/UK

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I build software and dashboards that improve incident response and production visibility.

Incident response, triage and debugging, root cause analysisGrafana dashboards, Logs/metrics Correlation, ReliabilityTypeScript/React/Next.js, Java, SQL and Databases

Work Experience

LunchLog.ie
Software Engineer
Full-time | Sep 2024 — Present
  • Designed and built a production web application independently using Next.js.
  • Defined application architecture, data models, and overall design without external direction.
  • Implemented core product features end-to-end, from UI through backend logic to deployment.
  • Iterated on the product improvements based on user feedback.
Sky, London
Technical Analyst
Contract | Apr 2023 — Sep 2024
  • Improved production observability using Grafana by refining dashboards and alerts, increasing signal-to-noise during incidents.
  • Triaged and resolved P0/P1 ServiceNow incidents by analysing logs and runtime data to isolate root causes under time pressure.
  • Worked closely with SRE and development teams during major incidents to restore service and minimise customer impact.
  • Identified recurring failure patterns and visibility gaps that slowed detection and diagnosis.
Adenza NASDAQ, London
Technical Analyst
Contract | Jun 2022 — Dec 2022
  • Diagnosed client-specific production issues by analysing application code and logs on a financial system.
  • Reproduced defects in test environments to validate bugs and fixes before release.
  • Collaborated with Business Analysts and Developers to triage defects and confirm root causes rather than symptoms.
  • Maintained ServiceNow incidents and JIRA tickets, contributing documentation to reduce repeat issues.
SAP, Dublin
Support Engineer
Full-time | May 2020 — Dec 2021
  • Worked on custom ABAP code and reporting pipelines supporting customer-facing systems.
  • Consulted clients on performance bottlenecks and custom code issues in live production environments.
  • End-to-end incident resolution for applications generating customer reports backed by Oracle databases.
  • Led a graduate project building an internal cloud application with a Spring Boot backend.

Projects

Observability Improvements at Sky
Observability Improvements at Sky
sky.com

Improved visibility into frontend data pipelines by refining Grafana dashboards and alerts, making previously hard-to-detect issues obvious during incidents.

GrafanaObservabilityDynatraceContentSquareKibana
LunchLog (School Lunch Ordering)
LunchLog (School Lunch Ordering)
lunchlog.ie

Created a digital lunch ordering system for Irish schools and suppliers: allergy tracking, parent ordering, daily order lists, paperless workflows.

Next.jsTypeScriptPostgresProject Management

Skills

Strong
LinuxDebugging production systemsIncident responseGrafanaSystem observability
Working knowledge
TypeScriptNode.jsReactNext.jsSQLDockerNginx
Exposure
CI/CD pipelinesKubernetesCloud infrastructureSREPerformance tuning

FAQ

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Interests

  • Movies
  • Drones
  • Coding and Tech