Backend software engineer

Brilian Firdaus

I work on distributed systems, mostly around orders, loyalty, identity, and search. I've spent 8+ years building and operating backend services at Grab and Blibli.

My work includes API performance, cloud migrations, and service reliability. I use Go and the JVM, with PostgreSQL, Kafka, Redis, and Elasticsearch.

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Current: GrabTransaction Platform
Previous: Blibli
Location: Jakarta, Indonesia

Selected projects

Backend systems

GrabAPI performance

Cross-sell API latency

Introduced concurrent downstream calls and a bulk caching layer. Reduced p99 latency from 2.5s to 1s, a 60% reduction.

BlibliInfrastructure

Loyalty Platform cloud migration

Led the migration from on-prem infrastructure to GCP across ~20 services. Added support for autoscaling, faster deployments, and improved observability.

BlibliIdentity & access

IAM rewrite and migration to GKE

Co-led the rewrite and migration, scaling throughput to ~5K QPS. Used Redis caching and Resilience4j circuit breakers to improve resilience.

Experience

Nov 2024 — Present
Grab
Jakarta
Senior Software Engineer, Backend
Transaction Platform
- Engineering Owner for cash payments on bundled orders. Resolved a cross-service pricing mismatch for a launch projected to add ~10K daily orders.
- Designed and launched Live Activity for cross-sell products, contributing approximately 5% of total cross-sell order volume.
Apr 2018 — Nov 2024
Blibli
Jakarta
Principal Software Development Engineer
Associate → Staff → Senior Staff → Principal
- Led Dream On for the 2023 year-end campaign, issuing ~2M unique raffle tickets at peak and designing fair, low-latency winner selection.
- Built event-driven search systems for ticket, voucher, and hotel products using Elasticsearch.