Software Engineer · Madrid

Alejandro Pérez

I build the backend infrastructure that gets quieter, not louder, as traffic grows.

Founding engineer at Awtomic (YC S20). 10+ years across Eventbrite, EA, ING. Currently going deep on distributed systems, observability, and the next wave of frontend.

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01 / Now May 2026

What I'm working on this quarter. A snapshot, kept honest. Inspired by /now pages.

Building

An open-source web performance SDK. Lightweight, browser-first, OpenTelemetry-compatible.

Going deep on

ClickHouse for analytics workloads and OpenTelemetry for end-to-end observability.

Reading

"Designing Data-Intensive Applications" — second pass, this time with notes.

Writing

First technical post lands in June: lessons from running a multi-tenant Shopify pipeline at Awtomic.

02 / Selected work

2021 — Present

Founding Engineer · Awtomic (YC S20)

Designed and own a multi-tenant, event-driven AWS pipeline (Lambda + SQS + DynamoDB) processing Shopify webhooks across 200+ merchants.

Idempotent retries and per-tenant queue isolation: a noisy merchant cannot starve the rest of the platform.
Observability that catches drift before customers do — structured logs, metrics, and synthetic checks across the webhook path.
Built two production React/Next.js storefront integrations on a shared design system, used in millions of customer transactions.

2019 — 2021

Senior Software Engineer · Eventbrite

Migrated critical high-traffic surfaces from a Python monolith into event-driven services (Kafka + Redis + MySQL).

Led the Zoom + Online Events integration that grew the share of online events from ~6% to ~30% of the catalog.
Owned frontend slices in React/TypeScript through the migration, keeping the user-facing path stable while the backend reshaped underneath.

2013 — 2019

Previously · EA · ING · Solera · Mediaset · Babel

10+ years across gaming, banking, automotive data, broadcast media, and consultancy. Frontend engineering and JavaScript platforms — the foundation that the rest of this page is built on.

03 / Stack

Two lists, kept honest. What I'm investing time in right now, and what I'd reach for in production tomorrow without a second thought.

Currently investing in

◦ Distributed systems◦ OpenTelemetry◦ ClickHouse for analytics workloads◦ React Server Components◦ Edge runtimes◦ System design at scale

Production experience

◦ Node.js◦ TypeScript◦ React◦ Next.js◦ AWS (Lambda, SQS, DynamoDB)◦ Django◦ Kafka◦ Redis◦ MySQL◦ Design systems

04 / Contact

Let's talk.

me@alejandroperez.dev →

Roles, collaborations, and technical conversations all welcome. Open to short coffee chats and mentoring.

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