Alex Mercer
Senior Backend Engineer
alex.mercer@example.com · +1 415 555 0142 · Austin, TX · linkedin.com/in/alexmercer · github.com/alexmercer
Backend engineer with eight years building payment and identity systems at scale. Led the migration of a monolithic billing service to event-driven infrastructure handling 40M transactions per month.
Experience
Senior Backend EngineerMar 2021 – Present
Northwind Payments, Austin, TX
- Rebuilt the settlement pipeline as an event-driven service, cutting end-to-end reconciliation time from 6 hours to 11 minutes.
- Designed an idempotency layer that eliminated duplicate charges, reducing payment support tickets by 73%.
- Mentored four engineers; two were promoted to senior within 18 months.
Go · PostgreSQL · Kafka · AWS
Backend EngineerJun 2018 – Feb 2021
Fieldmark, Remote
- Built a multi-tenant permissions service adopted by all 12 product teams.
- Reduced p99 API latency from 840ms to 120ms by introducing read replicas and query batching.
Python · Django · Redis
Education
BSc Computer ScienceSep 2014 – May 2018
University of Texas at Austin, Austin, TX
Skills
Languages: Go, Python, TypeScript, SQL
Infrastructure: AWS, Kubernetes, Kafka, Terraform