Hi, I'm Ryo Kusnadi
Backend & distributed systems engineer
I specialize in high-scale services, data correctness, and resilient payouts with measurable impact.
About Me
Principal-minded backend engineer at Shopee, owning reliability, migrations, and data quality at scale. I drive architecture decisions, production readiness, and measurable business outcomes.
Work Experience(Job)
Shopee
Sat NusapersadaEducation(School)
Universitas Internasional Batam- Graduated with high distinction, building a strong foundation in programming, systems design, and data management.
- Completed the Bangkit Academy (2021) — a prestigious tech program led by Google, Tokopedia, Gojek, and Traveloka:
- Specialized in Machine Learning with hands-on projects.
- Selected as a graduate with distinction for outstanding performance and team collaboration.
- Active member of the Information System Student Council:
- Developed internal web tools for organizing campus events.
- Mentored junior students during onboarding and technical workshops.
🛠 Skills & Expertise
My core technologies and tools:
💻 Programming Languages
- ⚡️ Golang — Scalable backend services
- 🐍 Python — Automation, scripting, data tasks
- 🏢 C# — Enterprise & manufacturing apps
- 🌐 JavaScript/TypeScript — Web & API development
🗃 Databases & Messaging
- 🗄️ PostgreSQL/MySQL — Relational data & transactions
- 🚀 Kafka — Event streaming & messaging
- ⚡️ Redis — Caching & pub/sub
- 📦 Protobuf — Fast RPC serialization
🧱 Infrastructure & DevOps
- 🐳 Docker — Containerization & orchestration
- 🔄 CI/CD — Automated deployment & testing
- 🔎 CDC — Real-time sync & anomaly detection
- 📊 Monitoring — Dashboards & alerting
🧩 System Design
- 🌍 Distributed Systems — Scalable, reliable services
- 🧩 Microservices — Modular architecture
- 🔒 Data Consistency — Idempotency, accuracy
⚙️ Tools & Frameworks
- 🛠️ Git, Postman, Insomnia, VS Code, IntelliJ
- 🤖 Arduino — Automation & prototyping
- 🔗 EDI, REST, SOAP — System integration
My Works
Selected builds and recent writing
Featured Projects
Case Studies
Reliability, migrations, and automation with measurable outcomes.
Zero-downtime migration to distributed DB
Led migration from legacy financial databases to a distributed architecture with phased cutovers, shadow traffic, and contract-based validation.
- Phased replication with CDC; dual-write guards; automatic drift detection
- Failover playbooks and SLO-based readiness checks before final switch
- Improved throughput and consistency for high-volume seller transactions
Real-time monitoring via CDC + contracts
Built anomaly detection using CDC streams and schema contracts to validate events and prevent silent data issues.
- Contract tests on payload shape, currency/amount bounds, and idempotency
- Alerting on divergence between source-of-truth and downstream consumers
- Runbooks with auto-mitigation hooks for common failure modes
Escrow lifecycle re-architecture
Redesigned escrow pipeline with layered validation and resilience patterns to protect payouts.
- Idempotent orchestration; retries with backoff and poison-queue isolation
- Boundary checks on amounts, FX, and duplicate events across services
- Recovery playbooks for partial failures and out-of-order messages
Get in Touch
Want to know more about my experience?
Download ResumeFeel free to reach out to me through any of these platforms. I'm always open to discussing new projects, creative ideas, or opportunities to be part of your visions.