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  • SK Telecom

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Achievement: Pair Extraordinaire

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Achievement: Pair Extraordinaire

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ronjay1827/README.md

Sungchan Jo

Data Platform Engineer  ·  Seoul, Korea

I run Spark and StarRocks as a service on Kubernetes, and I came to it from the infrastructure side:
CI/CD, IaC and monitoring first, then the data pipelines, then the query engines themselves.
Currently at SK Telecom, on a multi-tenant data platform.

LinkedIn Email Work email at sktelecom.com

What I work on

  • Query engines as a self-service platform. Per-user Spark and StarRocks clusters on Kubernetes: a Java and Spring Boot orchestration service for the cluster lifecycle, plus custom operators.
  • Engine tuning. FE and CN memory, data cache, CPU, query queue, and Iceberg external catalog behavior.
  • Observability. Metric sidecars per cluster, rule-based diagnostics, Grafana dashboards.
  • Pipelines. Kafka streaming and orchestrated batch jobs.
  • Cloud-native infrastructure. Kubernetes, Terraform, ArgoCD and GitOps, CI/CD, LGTM stack monitoring.

Tech

Query & dataSpark StarRocks Iceberg Kafka Strimzi Dagster HDFS
PlatformKubernetes Helm ArgoCD Terraform Docker Jenkins GitLab AWS Naver Cloud Platform GCP
BackendJava Spring Boot Java Operator SDK Fabric8 Hibernate Python FastAPI SQLAlchemy
ObservabilityPrometheus Grafana Loki Tempo OpenTelemetry OpenSearch

Certifications

CKA CKAD KCNA KCSA

CKA (2022.12), CKAD (2025.07), KCNA (2025.07), KCSA  ·  The Linux Foundation
NCP Certified Professional (2021.12)  ·  Naver Cloud Platform
SQLD (2023.07)  ·  정보처리산업기사 (2022.06)  ·  네트워크관리사 2급 (2021.07)  ·  OPIc IH (2026.06)

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