Chewoo – Golang, Kubernetes, Jenkins

A data-infrastructure software company that unifies unstructured data across data centers, clouds, and edge locations for AI, analytics, and high-performance computing.

• Architected a Kubernetes deployment solution for the company’s high-performance distributed file system for AI/ML infrastructure, focused on high availability, data protection, and disaster recovery.
• Led the design of the metadata cluster’s high-availability architecture, defining its technical scope and guiding end-to-end implementation planning.
• Shaped key design decisions by analyzing product requirements and running iterative feedback loops with stakeholders.
• Wrote and peer-reviewed system architecture documents and functional specifications.
• Implemented core components behind critical system capabilities.
• Worked with cross-functional teams to manage risks and keep delivery on track against milestones.

Cluster management for HPE’s highly available distributed storage cluster running on Kubernetes, covering cluster initialization, provisioning, lifecycle management, and TLS certificate management.

• Joined as a founding member of the Cluster Management Service (Compute) team.
• Architected and built a bootstrap service, deployed as a Kubernetes operator, that automates cluster initialization and lifecycle management;
• Designed and built a distributed Cluster Management Service that provisions, orchestrates, and manages Kubernetes clusters at scale, on a workflow-based framework.
• Built a TLS certificate management service for the HPE Trust Store, covering the full PKI/TLS certificate lifecycle.
• Wrote specifications for CRDs, custom resources, and OpenAPI REST APIs, and peer-reviewed design and architecture documents.
• Defined and prioritized user stories with the product owner, and worked with product management and other teams from inception to delivery.
• Mentored engineers on software design, code reviews, and development best practices.

Standards-compliant NETCONF/YANG device management interfaces for Cisco IOS-XR platforms.

• Led the design and development of NETCONF/YANG operational and configuration models and an event-driven module for Cisco IOS-XR platforms.
• Architected an object repository and broker system to improve modularity and component lifecycle management in the NETCONF backend server.
• Led NETCONF/YANG model test automation, building scalable frameworks that validate model correctness and conformance.
• Refactored and optimized the NETCONF/YANG backend server for better performance, maintainability, and reliability.
• Implemented a management daemon that serializes concurrent access to the device driver and system database, preventing race conditions.

Configuration Template infrastructure for Data Domain Management Center, plus management infrastructure for the Dell EMC License Server.

• Delivered Configuration Template v1.0 for DDMC, including writing its functional specification.
• Designed the core Configuration Template infrastructure, including CLI commands and the System Management Service infrastructure and workflow components.
• Built PostgreSQL queries, database access APIs, and REST APIs for web access to configuration templates.
• Designed and built a dependency resolution infrastructure and a job dispatcher that assigns service requests to worker threads.
• Designed and built the management infrastructure for the served-mode Dell EMC License Server, including CLI commands and the System Management Service.

Rate limiting (QoS) and messaging infrastructure for ASA systems.

• Designed and extended the CLI commands for rate limiting (QoS) on ASA systems.
• Built a generic synchronous and asynchronous message queue based on shared memory.
• Defined test cases and implemented unit tests for the ASA infrastructure.
• Debugged and fixed issues in the rate-limiting infrastructure.

JUNOS kernel network infrastructure.

• Refactored and optimized JUNOS network infrastructure, including next hops, IP interfaces, and link aggregation (802.3ad).
• Built debugging tools that track next-hop forwarding behavior for link aggregation, plus more than 10,000 lines of GDB macros.
• Developed redundant logical tunnel interfaces.
• Designed the system software architecture describing the functions and interfaces of modules such as web servers, routing daemons, and CLI components.
• Designed the system database (MIB) accessed by network management systems via SNMP, and the interfaces that let software modules use it;
• Designed an IGMP snooping agent and a GUI-based CLI that connects users to the management daemon.
• Worked with test and technical engineers on urgent customer issues.