Hi, my name is

Yong Ji Chen

Software EngineerFull-Stack DeveloperNative C++ EngineerAI / LLM Builder

I'm a New York–based software engineer who ships across the stack — from multithreaded native C++ desktop agents running on tens of thousands of machines to modern React/Next.js products and AI/LLM-powered features.

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01 — About

A bit about me

I'm a software engineer at Here Enterprise, where I help build a modern enterprise browser and design AI/LLM-powered tooling. Over the past several years I've worked across the full spectrum — native C++ desktop software at scale, full-stack web applications, and most recently multi-model LLM integrations.

I care about reliability, clean abstractions, and making complex systems usable. I enjoy owning features end-to-end, mentoring teammates, and turning messy problems into maintainable solutions.

Location
New York, NY
Current
Software Engineer @ Here Enterprise
Education
B.S. Computer Science, University at Buffalo
Focus
C++ · TypeScript · React · AI/LLM

02 — Skills

Tools I work with

Languages

  • C++
  • TypeScript
  • JavaScript
  • HTML / CSS

Frameworks & Databases

  • React
  • Next.js
  • Node.js
  • PostgreSQL
  • Elasticsearch
  • Win32 API

DevOps

  • Docker
  • GitHub CI/CD
  • Grafana

AI / LLM

  • Multi-LLM integration
  • Context management
  • Token optimization
  • Chat UX

GRC & Compliance

  • NIST CSF
  • HIPAA
  • BCP / BIA
  • Third Party Risk Management

03 — Experience

Where I've worked

  1. Software Engineer @ Here Enterprise

    CurrentSep 2023 – Present

    New York, NY

    • Led the design and implementation of an internal AI Prompt Library within the AI Center while mentoring two interns — delivering a reusable, structured prompt system with dynamic inputs and production integration that improved prompt consistency, scalability, and cross-team adoption of LLM-powered workflows.
    • Designed and implemented a multi-model LLM feature supporting flexible routing across providers, enabling dynamic model selection based on use case and constraints.
    • Engineered token-aware Azure OpenAI integration for a production AI assistant with intelligent context truncation and chat-history compression.
    • Implemented base64 image handling and TPM budgeting, enabling rich multi-turn conversations with dynamic context and screenshots.
    • Owned and shipped core features for the Here Browser, improving usability and system flexibility for users.
    • Enhanced logging infrastructure to support larger log volumes and improve stability during long-running production sessions, enabling easier diagnosis and quicker support turnaround.

  2. Full Stack Developer @ Haven Technologies

    Oct 2022 – Sep 2023

    New York, NY

    • Drove product and risk decisions by building data visualizations (DBeaver) over 100k+ in-force policies, enabling the team to prioritize coverage and new client integration.
    • Implemented underwriting workflows and rules that increased SaaS coverage and flexibility for new client onboarding.
    • Shipped an end-to-end feature — government ID fetch, new DB schema, and Angular/RxJS frontend integration — and built APIs to parse application fields and improve ACORD standardization coverage.

  3. Software Engineer @ OpenFin

    Jun 2019 – Oct 2022

    New York, NY

    • Owned a multithreaded desktop agent (C++11) running on 45k+ desktops at banks and financial institutions; reduced latency and removed bottlenecks to improve startup and reliability.
    • Led a "self-installing" feature set used by 85% of clients, enabling custom deployments; owned rollout via auto-update to 10,000+ desktops.
    • Built Grafana dashboards for installation, feature usage, and health — reducing support load and making product usage visible for decisions.
    • Designed a fallback mechanism for unmanaged environments to keep deployments evergreen; migrated legacy tests to Mocha/JS and GitLab CI/CD for better coverage and visibility.

  4. QA Engineer (Intern) @ Blue Cross Blue Shield

    May 2018 – Dec 2018

    Buffalo, NY

    • Created automation (Robot Framework) in a custom CI pipeline; built and maintained test suites that cut manual toil for the QA team.

  5. Coding Instructor (Lead) @ Code Nation

    Jun 2017 – Aug 2017

    New York, NY

    • Served as instructor lead, teaching kids from introductory to advanced JavaScript.

  6. Coding Instructor @ Hudson Guild

    Jun 2016 – Aug 2016

    New York, NY

    • Taught a class on introductory HTML, CSS, and JavaScript.

  7. Software Developer Intern @ American Express

    Jun 2015 – Aug 2015

    New York, NY

    • Worked on the disputes team, improving end-to-end testing using Angular.

  8. Software Developer Intern @ Thrillist

    Jun 2014 – Aug 2014

    New York, NY

    • Worked with the design team to improve the company's contact page.

04 — Education

Where I studied

University at Buffalo

B.S. in Computer Science

Buffalo, NY

06 — Contact

Let's build something

I'm always open to interesting problems, new opportunities, and good conversations. The fastest way to reach me is by email.

Email

[email protected]

LinkedIn

linkedin.com/in/yongjichen