Jh Sun
Software engineer

Contact Info

Education

  • 2004-2007

    Master Degree in Computer Science

    Dalian Jiaotong University

  • 1999-2003

    Bachelor Degree in Compputer Science

    Dalian Jiaotong University

Language

  • Chinese
  • English

Experience

2025-Present
Verq

AI Product QA

  • Business Logic Validation: Rigorously evaluate AI-generated code, project structures, and content against complex business requirements to ensure real-world applicability and accuracy.
  • Hallucination & Error Detection: Proactively identify and mitigate logical gaps, edge cases, and AI hallucinations to prevent the deployment of incorrect or unusable outputs.
  • Quality Assurance (QA): Design and execute comprehensive manual and automated testing strategies on AI-generated projects to guarantee functional integrity within business contexts.
  • Product Ownership: Spearhead the end-to-end quality assurance process as the sole QA owner, taking full responsibility for the viability and excellence of the company's core product.
  • Continuous Improvement: Analyze AI failure modes and establish robust feedback loops to refine prompts, optimize workflows, and enhance future model training.
2024-Present
Casper Association

Lead Technical Support Engineer

  • Orchestrate the testing and deployment of software releases using Terraform and Ansible on AWS cloud infrastructure.
  • Lead technical support initiatives for the Casper Blockchain ecosystem, resolving complex node operational issues and guiding developers in building decentralized applications.
2021-2024
Casperlabs

Level 3 Technical Support

  • Provided comprehensive technical support for the BSN private network, guiding clients through the entire lifecycle from launching new blockchains to developing decentralized applications.
  • Delivered exceptional technical mentorship during the hackathon Casper projects, contributing to its significant success and receiving outstanding feedback from both participants and internal teams.
  • Engineered robust code demos and troubleshot complex issues for Smart Contracts using Rust, JavaScript SDK, Python SDK, Golang SDK, Java SDK, and Bash scripts.
  • Resolved critical node operational issues on Ubuntu and provided advanced support for applications built on the Casper blockchain.
2015-2020
IBM

Technical Support Engineer

  • Delivered global technical support to enterprise customers across the US, Europe, Australia, and Asia via calls, Slack, and case management systems.
  • Conducted deep-dive technical analysis of system dumps, logs, and documentation to diagnose and resolve complex issues on CICS for z/OS and Linux.
  • Achieved multiple "Perfect 10" customer satisfaction scores by consistently improving operations and providing exceptional client support.
  • Consulted with clients to understand their business needs, offering strategic recommendations to optimize their CICS usage and application performance.
2013-2015
IBM

Project Manager

  • Spearheaded the end-to-end lifecycle of multiple projects, successfully managing budgets, schedules, and performance metrics.
  • Orchestrated project planning, design, and scheduling to ensure timely delivery and alignment with IBM's strategic objectives.
2007-2013
IBM

Application developer

  • Designed and implemented customized client solutions leveraging expertise in COBOL, PL/I, JCL, and Bash programming.
  • Mentored and led a team of 3 application developers, fostering a collaborative environment through effective communication and active listening.
  • Engineered new applications and performed critical code maintenance and system upgrades to maximize performance and reliability.
  • Collaborated cross-functionally with engineers, system analysts, and programmers to define project scope, capabilities, and deliver optimal functionality.
  • Actively participated in client meetings to gather requirements, resolve system test and validation issues, and ensure seamless program execution.
  • Contributed to the architectural design and strategic planning for future software rollouts across z/OS and Linux systems.

Professional Skills

Kubernetes

Terraform

Ansible

AWS Cloud

Kubernetes

Rust

Javascript

Python

Bash

Go

Smart Contract