Herlangga Yusuf Syailendra
Backend / Data / Infrastructure Engineer
Building scalable backend systems, data pipelines, and cloud infrastructure with a relentless focus on performance, reliability, and cost efficiency.
Reduced latency from ~4s to <100ms via backend and infra optimization.
Lowered cloud costs by ~40% through architecture & query improvements.
Built observability stacks achieving 5x faster anomaly detection.
Tech Stack
Backend
Data
Infrastructure & Cloud
Observability
Systems & Architecture
High-Volume Email Pipeline
AWS SES → SNS → Service → ClickHouse
- Processed 500K+ events (delivery, bounce, engagement).
- Handled 50K+ emails with strong deliverability guarantees (SPF, DKIM, DMARC).
- Designed an idempotent, retry-safe ingestion architecture.
Monitoring Email from SES Dumped to Clickhouse for low-cost lead generation and engagement tracking.
Data Platform Modernization
- Migrated from Athena to BigQuery to drastically improve query performance and cost control.
- Built robust OLAP pipelines for internal analytics.
- Engineered OLAP → OLTP synchronization to power real-time dashboards and microservices.
Comprehensive Observability Stack
Cloud Run → Log Router → BigQuery → Grafana → Discord
- Centralized logging and monitoring for highly distributed services.
- Implemented query-driven metrics to detect anomalies swiftly.
Website Latency and Load Monitoring
Analyzing Token Usage & Cost for AWS Bedrock Wrapper
Other Notable Systems
- AWS Bedrock Wrapper: Built an OpenAI-compatible API Gateway for AI services (OpenAI / Ollama → Bedrock) using Rust, ClickHouse, and SQLite. [View Repository]
- Distributed Rendering: Configured multi-node distributed Blender rendering infrastructure.
- n8n Automation: Built complex email processing workflows integrating Listmonk and Discord.
n8n Triggered from Email → Listmonk → Discord → Review → Send