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I'm Sheldon, but you might also know me as

an AI Researcher

Hey, thanks for stopping by! My work is driven by a deep passion for leveraging technology to make a genuine difference. At Hack4Impact-UMD, I lead diverse teams to build practical software solutions empowering nonprofits and communities. Whether it's refining AI models for research or speaking to hundreds of students about social-impact tech, I'm energized by collaboration, creativity, and purpose-driven innovation. Above all, I care about creating ethical and accessible tech that helps real people solve real problems.

Experience

Work Experience

University of Maryland - Part-time logo

Artificial Intelligence Researcher

University of Maryland - Part-time

Apr 2024 - Present

  • Engineered end-to-end Python VLM benchmarking framework using llama-cpp-python, enabling robust inference from Llama-based (Llava) and other GGUF models via structured JSON output, resolving complex CUDA runtime issues on Colab GPUs (T4/A100).
  • Executed systematic VLM/LLM evaluations comparing diverse architectures (Llava, Moondream2) and quantizations, analyzing performance (accuracy, latency, F1), generating actionable insights guiding model selection for resource-constrained robotic platform.
  • Built a downstream multilayer perceptron model integrated with a fine-tuned Vision Transformer, improving human vocalization classification accuracy from 70% to 90% compared to baseline methods.
  • Developed an algorithm utilizing YOLOv8 model, deployed on Spot robots as part of the DARPA Triage Challenge.
  • Scraped audio from 25k+ YouTube videos, applying a variety of feature extraction and data engineering methods to develop and test multiple Multilayer Perceptron models.

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Amazon Web Services (AWS) - Internship logo

Software Development Engineer Intern

Amazon Web Services (AWS) - Internship

Jun 2024 - Aug 2024

  • Singlehandedly built full-stack web application for automated permission management using React, TypeScript, Python, and AWS services (DynamoDB, Lambda, API Gateway), automating and securing the current process.
  • Implemented 6 backend REST APIs using Python, Smithy, and FastAPI (1500+ LOC), including advanced error handling, input validation, and comprehensive logging.
  • Used AWS CDK to automatically deploy testing/monitoring stacks and AWS services such as DynamoDB Lambda, enabling seamless deployment of the project infrastructure on production.
  • Built React/TypeScript components (web form and data display table) to handle user data creation and editing, with features like input sanitization, error handling, and pagination.
  • Achieved 90% test code coverage across 70 backend unit tests with Python's unittest library, utilized Jest and testing-library/react for frontend unit tests, and used Cypress for end-to-end integration tests.
  • Integrated APIs with another team's AWS AppSync service using Python Requests library, enabling secure retrieval of user data without having to store sensitive info.
  • AWS Partner Analytics and Insights Team.

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Oracle - Internship logo

Software Engineer Intern

Oracle - Internship

May 2023 - Aug 2023

  • Wrote thousands of lines of production JavaScript code resulting in performance optimization, improved tool integration, shortened build time, and reduced deployment cycles for multiple web applications.
  • Modernized DevOps application crucial to thousands of businesses by writing JavaScript code to update the JavaScript toolkit version of over ~75% of the application's pages.
  • Future-proofed customer-facing reporting and analytics application that serves thousands of businesses by rewriting its administration section to update its JavaScript toolkit version.

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Volunteer Experience

Hack4Impact-UMD - Part-time logo

Co-Executive Director

Hack4Impact-UMD - Part-time

Apr 2024 - Present

  • Oversaw high-visibility operations, managing an executive board of 15 directors and driving strategy across all roles. Guided the direction of the organization by providing input on all key initiatives.
  • Spearheaded a Microsoft mentorship program that put DC-area Microsoft employees on our project teams, by ideating and pitching the collaboration, coordinating mentor placements, meeting with Microsoft leadership, improving program based on feedback, and performing other administrative tasks.
  • Built and maintained strategic partnerships with companies (including Microsoft, Uber, Bloomberg), on-campus faculty, and other key stakeholders such as UMD's President and UMD's Do Good Institute.
  • Developed full-stack development workshop for 120+ highschoolers at Microsoft's BAM Minority Student Day (github.com/DevShel/microsoft-workshop).
  • Represented the organization at tabling events/interest meetings and led general body meetings.
  • Represented the organization and spoke at Microsoft's 2025 Global Nonprofit Leaders Summit.
  • Handled high-stakes operations - drafting contract agreements, performing project audits for the national board, and resolving the variety of complex challenges that come with this work.

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Microsoft - Part-time logo

Hack4Good Engineer

Microsoft - Part-time

Feb 2025 - Mar 2025

  • Architected and built a multilingual RAG agent with vectorizing and indexing documents via Azure AI Search Service and OpenAI's text-embedding-3-large model.
  • Developed experiments to refine chatbot translation strategy; created synthetic dataset to improve responses.
  • Hack4Good is an invite-only internal multi-month Microsoft hackathon, where Microsoft employees work with nonprofits to build free software solutions, organized by Hugo Marques and the Tech for Social Impact team.
  • As part of my team's project (led by Parijat Dalal) with Global FoodBanking Network, I defined our project description, led project meetings, and helped coordinate our team's direction.

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Hack4Impact-UMD logo

Director of Project Sourcing

Hack4Impact-UMD

May 2022 - Apr 2024

  • Led a 5-10 person sourcing team over 4 semesters, leading meetings with over 60 nonprofits and securing 5 high-quality projects each semester for our 100-member organization.
  • Built out the Director of Project Sourcing role from scratch - developing onboarding documents, standardized project description templates, and a director's guide for future leaders.
  • Defined and formalized key processes (including project voting, evaluation rubrics, nonprofit collaboration agreements, call scripts) to streamline project intake and selection.
  • Expanded project scope from basic websites to complex web applications, forging partnerships with larger nonprofits such as Leveling the Playing Field, Appalachian Trail Conservancy, and The Children's Cancer Foundation.

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Awards & Honors

Google Research logo

Google CS Research Mentorship Program

Google Research

2023

Selected for a prestigious Google initiative pairing students with industry-leading computer science researchers.

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Bloomberg logo

Bitcamp 2023 Most Philanthropic Hack

Bloomberg

2023

Awarded for Occupan-See, a computer vision tool built to monitor unsafe occupancy levels in real-time.

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Amazon logo

2nd Place, Amazon-UMD Design Challenge

Amazon

2022

Recognized for leading the creative redesign of the campus transportation app with a focus on accessibility.

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Technical Projects

ML/AI

Responsible AI Benchmarking

Developing reproducible evaluation pipelines for assessing language models on fairness, robustness, and misinformation benchmarks.

PythonPyTorchHugging Face
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ML/AI

Microsoft Hack4Good 3.0

Building an agentic assistant for a nonprofit! Implemented advanced RAG techniques for improved information retrieval.

Azure AI SearchAzure OpenAIText-embedding-3-large
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Full Stack

Microsoft Minority Student Day Workshop

I built a full stack workshop for over 100 kids! Created a complete end-to-end learning experience featuring modern web technologies.

Next.jsReactAzure Cosmos DB
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Speaking Engagements

Education

CMSC320: Advice in the Age of AI

Guest lecture in CMSC320 at UMD on practical insights from real-world AI/ML experience.

AIMachine LearningEducation
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Industry Talk

Microsoft Talks and Taps Event

Visited Microsoft's Reston, VA office to recruit Hack4Impact mentors.

MentorshipNonprofit Tech
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Organization

Hack4Impact-UMD Events

Regular speaking at Hack4Impact-UMD on social impact technology.

LeadershipSocial Impact
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Other Projects & Initiatives

Design

UMD Next

An app reimagined for The Amazon-UMD Design Challenge. Created innovative user experience designs focused on campus connectivity.

UX/UI DesignUser ResearchDesign Thinking
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Research

Northrop Grumman A.I. Challenge

Presentation about making computer vision more ethical. Addressed bias, privacy concerns, and proposed solutions for responsible AI.

AI EthicsComputer VisionResponsible AI
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Sustainability

Universitas 21 Challenge

Ideating methods to promote compressed natural gas vehicles in Tanzania. Developed sustainable transportation strategies for emerging markets.

SustainabilityInternational DevelopmentClean Energy
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