Blockchain infrastructure for institutions that can't afford downtime.

Work

1. 2025 — Now

   Cold Storage Engineer III · Coinbase

   • Built pre-call automation integrating Calendly, Snowflake, Datadog, and Slack to auto-surface institutional client context — transactions, duress status, identity, approver eligibility — before high-stakes approval calls.
   • Automated cold-to-hot wallet balance restoration with multi-source enrichment (Snowflake, Datadog, Glean, Messari) via Slack, cutting team AI token spend by $500–$1,000 USD/month.
   • Approved high-value institutional cold-storage transactions and conducted video verification calls under Coinbase Prime and Custody operational protocols.
   • Provided white-glove support to institutional clients on staking, cryptographic, and transaction issues across multiple chains.
   • Operated in 24×7 global rotation under strict compliance and security standards. Partnered with Security, Product, and Engineering on operational improvements.

   • Snowflake
   • Datadog
   • Slack
   • Custody ops
   • Compliance
2. 2023 — 2025

   Senior Blockchain Security DevOps Engineer · Crypto.com

   • Provisioned and operated validator and RPC nodes across TON, Conflux, Celestia, Oasis, Fetch.ai, NEO3, Neutron, ZetaChain, and Vara — including upgrades and incident response.
   • Built node deployment pipeline using Terraform, Docker, Ansible, and Azure DevOps CI/CD with auto-pull of updated container images.
   • Standardized Cosmos-family deployments by consolidating multiple Ansible playbooks into one modular template, reducing rollout time for new chains.
   • Built developer environment POC: Terraform-provisioned Azure VMs accessed via Teleport from VS Code Remote, with automated idle-instance shutdown after 6pm to reduce developer cloud spend.
   • Wrote custom Prometheus exporters for chain-specific node health monitoring.

   • Terraform
   • Ansible
   • Docker
   • Cosmos
   • Azure DevOps
   • Prometheus
3. 2022 — 2023

   DevOps Engineer · Tencent

   • Primary point-of-contact for PUBG Mobile production infrastructure: 6,000+ VMs supporting 4–10M daily concurrent users.
   • Reduced alert noise from 600+ rules to 140 actionable alerts by reclassifying and rewriting system and network monitoring logic.
   • Built FastAPI-based alert automation integrating Bash scripts and CI/CD pipelines for incident auto-triage and WeCom responder notification.
   • Solution presented to the Director of Tencent Overseas Games and adopted as best-practice reference across teams.

   • FastAPI
   • Prometheus
   • Grafana
   • Bash
   • CI/CD
4. 2021 — 2022

   DevOps Engineer · UP DevLabs

   • Managed environments across AWS, Aliyun, and Tencent Cloud. Built CI/CD pipelines for repeatable deployments.
   • Implemented ELK Stack for developer self-service log search, reducing ops support load.
   • Established Grafana and Prometheus monitoring for system health and capacity planning.

   • AWS
   • Aliyun
   • ELK
   • Grafana
5. 2021

   System Analyst · Kenrich Partners

   • Day-1 phishing incident response. Coordinated with legal counsel (Rajah & Tann) and performed root cause analysis.
   • Led MAS TRM compliance initiatives: asset tracking, system hardening, SIEM setup.
   • Migrated on-prem infrastructure to Azure.

   • MAS TRM
   • SIEM
   • Azure
   • Incident response
6. 2020 — 2021

   SNOC Engineer · Government Technology Agency (GovTech)

   • Monitored and maintained uptime for critical government systems using AWS CloudWatch, Grafana, Splunk, and SolarWinds.
   • Supported real-time incident triage, root cause analysis, and cyber threat detection for national digital services.

   • CloudWatch
   • Splunk
   • SolarWinds
   • Grafana
7. 2020

   NOC Engineer · Netpluz Asia

   • Provisioned and troubleshot circuits (Baccess, GPON, MetroE) and configured Cisco and Sophos network devices.
   • Built Python automation tools to streamline operations, reducing manual ITSM reporting by 80%.

   • Cisco
   • Sophos
   • Python
   • Networking

Projects

1. 2025

   Site Reliability Engineer · Valigator (independent contract)

   • Built production-grade Solana staking infrastructure for a white-glove validator service.
   • Authored Ansible playbooks to automate validator provisioning, upgrades, and monitoring setup.
   • Developed a custom Solana Node Exporter integrated with Prometheus and Grafana dashboards.

   • Solana
   • Ansible
   • FastAPI
   • Prometheus
   • Grafana
2. 2024 — 2025

   Senior Infrastructure Support Engineer · Thoughtworks (independent contract)

   • Designed and deployed enterprise-scale cloud infrastructure using Infrastructure as Code, improving scalability and resilience.
   • Led end-to-end build and maintenance of SNTC.org.sg, a public-good project supporting Singapore's special needs community.
   • Delivered government-requested website updates within 2 weeks, ensuring compliance and uninterrupted service.
   • Partnered with CTO/CIO/COO stakeholders to align technical delivery with organizational goals.

   • AWS
   • Terraform
   • IaC
   • Compliance

Open source · github.com/angpenghian

1. 2025

   Agent Times

   x402 pay-per-request news API designed for AI agents to consume. Node.js, Express, Docker, SearXNG, SQLite on DigitalOcean. 28,000+ articles indexed across 1,100+ RSS feeds. Received first real USDC payment on Base mainnet.

   • Node.js
   • Express
   • Docker
   • SearXNG
   • x402
   • Base
2. Ansible

   solana-ansible-kit

   Production-grade Ansible automation provisioning Solana validator fleets with security hardening, performance tuning, and zero-downtime upgrades.

   • Ansible
   • Solana
   • Linux
3. CI/CD

   solana-repro-builds

   Automated CI/CD pipeline (GitHub Actions) publishing reproducible Solana validator binaries with hermetic Docker builds and checksum verification.

   • GitHub Actions
   • Docker
   • Solana
4. Prometheus

   solana-exporter

   Prometheus exporter (Python/FastAPI) for Solana validator observability — exposes 26+ metrics, ships with a 21-panel Grafana dashboard.

   • Python
   • FastAPI
   • Prometheus
   • Grafana

Skills

• Blockchain

  Solana · TON · Cosmos (Neutron, Fetch.ai, Vara) · Celestia · Oasis · Conflux · NEO3 · ZetaChain · validator and RPC node operations · staking infrastructure

• Cloud & IaC

  AWS · GCP · Azure · Tencent Cloud · Terraform · Ansible

• Containers & CI/CD

  Docker · Kubernetes (CKA) · Helm · GitHub Actions · Azure DevOps · Jenkins · ArgoCD

• Data & Observability

  Snowflake · Prometheus · Grafana · Datadog · ELK · Splunk · PagerDuty

• Scripting & Automation

  Python (FastAPI, Flask) · Bash · JavaScript

• Integrations

  REST APIs · Slack · Calendly · Glean · Messari

• Security & Compliance

  SIEM · MAS TRM · incident response · root cause analysis · post-mortems

• AI Tooling

  OpenAI API · Claude Code · Cursor · n8n · agentic patterns (tool orchestration, context management) · AI-assisted development workflows

Certifications

• CKA

  Certified Kubernetes Administrator · CNCF

• Terraform

  HashiCorp Certified — Terraform Associate

• AWS SAA

  AWS Certified Solutions Architect — Associate

• AWS CCP

  AWS Certified Cloud Practitioner

• Tencent SA

  Tencent Cloud Solutions Architect — Associate

• Tencent SysOps

  Tencent Cloud SysOps — Associate

• Azure AZ-900

  Microsoft Certified — Azure Fundamentals

• Sophos CE

  Sophos Certified Engineer