Sam Mucyo

Harvard Computer Science senior who tackles complex problems and delivers results. Proven ability to adapt and contribute at Amazon, while strengthening leadership as a teaching fellow for CS50 and CS2050. Excited to bring this proactive, adaptable approach to any team seeking innovative problem solvers.

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Sam Mucyo
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Experience

  1. January 2025 - Present

    Cambridge, MA

    Teaching Fellow

    Harvard University

    Assist in teaching parallel programming concepts and high-performance computing techniques.
    • Guide students in using HPC tools like CMake, Slurm, and profiling tools on compute clusters
    • Support implementation of parallel algorithms for shared and distributed memory systems
    • Provide detailed feedback on assignments and projects to improve student understanding

    Skills & Technologies:

    OpenMPMPICUDAHPCParallel ProgrammingCMakeSlurm

  2. May 2024 - August 2024

    Seattle, WA

    Software Development Engineer Intern

    Amazon.com

    Developed a reusable A/B testing framework for dynamic profile badges that improved feature rollout efficiency.
    • Created a reusable A/B testing framework for dynamic profile badges using Java/Spring MVC
    • Improved API usage and accuracy by identifying and resolving misuse of the internal A/B API
    • Conducted statistical analysis to support the redesign of the system
    • Collaborated with UX designers to implement responsive badge designs across mobile and web platforms

    Skills & Technologies:

    JavaSpring MVCA/B TestingStatistical AnalysisAWSMicroservices

  3. May 2023 - August 2023

    Seattle, WA

    Software Development Engineer Intern

    Amazon.com

    Built a serverless rule-based risk monitoring system that reduced alert response time by 40%.
    • Architected APIs for a rule-based risk monitoring and alarming system
    • Developed a Python-based backend with AWS CDK for rapid deployments
    • Leveraged AWS Lambda and DynamoDB for scalable solutions

    Skills & Technologies:

    PythonAWS CDKLambdaDynamoDBAPI Gateway

  4. Fall 2022 and Fall 2023

    Cambridge, MA

    Teaching Fellow

    Harvard University

    Mentored students in CS50, Harvard's largest computer science course, covering programming fundamentals.
    • Conducted detailed code reviews for over 40 student projects
    • Mentored students during weekly office hours on multiple programming languages
    • Led hands-on lab sessions covering data structures, algorithms, and web development
    • Assisted in developing course materials and problem sets

    Skills & Technologies:

    CPythonJavaScriptSQLData StructuresAlgorithmsTeaching

  5. June 2022 - August 2022

    Boston, MA

    Software Development Engineer Intern

    Amazon Web Services

    Developed a serverless data lake solution that improved testing efficiency for the AWS Redshift team.
    • Designed a serverless data lake using Python, AWS S3, and Glue
    • Enhanced bottleneck detection in Redshift infrastructure testing
    • Automated data pipeline integration with internal visualization tools
    • Implemented ETL processes for performance metrics collection and analysis

    Skills & Technologies:

    PythonAWS S3AWS GlueETLData LakesSQLData Visualization

Projects

Surround-Sound Player

Distributed Systems & Music

A peer-to-peer audio system that keeps multiple laptop “speakers” in sync without proprietary protocols. Designing gRPC/protobuf contract, CI/CD pipeline, and writing fault-tolerant code that prove seamless playback after node loss. Each client buffers tracks fetched from a lightweight server and adjusts audio timing to achieving ≤10 ms drift across Wi-Fi.

C++gRPCProtobufCoreAudioFault TorelanceCI/CDView Project

Claude Yap – AI Podcast Generator

AI & Product Engineering - Hackathon

A Full-stack web app that turns PDFs or research prompts into multi-speaker podcasts. Orchestrates Claude 3 (script generation), Cartesia TTS (distinct voices), Stable Diffusion cover art, and FFmpeg piping. Provides a React audio player with keyboard shortcuts, real-time progress dashboard, and AI video-chat via Tavus.

ReactFlaskClaude 3Cartesia TTSStable DiffusionFFmpegNode.jsView Project

Optimized Column-Store Database

Systems Programming

Built a C-based, in-memory columnar DBMS from scratch for faster analytical queries than a baseline row-store. Achieved this by integrating cache-aware storage layouts, secondary B-tree indexes, and zero-copy persistence via mmap, all orchestrated with fine-grained POSIX threads.

CPOSIX ThreadsB-treesmmapView Project

Chat App

Distributed Systems

Co-designed a PyQt6 desktop chat client and Python server that supports two wire protocols (JSON + custom “SAMIRA” 🔥) and a 2-fault-tolerant replication layer. Built the custom protocol, gRPC server-to-server channel, and a Raft-inspired leader-election module for replication, automatic fail-over and dynamic replica add/remove.

PythonPyQt6gRPCProtobufRaftGitHub ActionsMakeView Project

Parallel Transit-Network Optimizer

High-Performance Computing

Setup HPC infrastructure and performance benchmarking for a 32 768-vertex Kruskal MST study on urban-transit graphs. Automated SLURM + Bash pipelines, PAPI metrics, and Valgrind memory profiling; produced strong/weak-scaling dashboards that revealed an 18 × speed-up on 64 CPUs and ≈ 40 % weak-scaling efficiency. Contributed to algorithm-design (MPI edge partitioning, OpenMP Hyper-QuickSort, helper-thread pruning).

C++OpenMPMPIPAPIValgrindSLURM

Astrolibrary

Scientific Computing

Co-developed a Python package for stellar spectral reduction and feature extraction. Drove CI/CD with GitHub Actions, pytest coverage, and Sphinx documentation.

PythonpytestSphinxGitHub Actions

Skills

HPC & Systems Programming

  • C
  • C++
  • POSIX threads
  • OpenMP
  • MPI
  • GDB
  • Valgrind

Cloud & Backend Development

  • AWS Lambda
  • S3
  • DynamoDB
  • CDK
  • Glue
  • Redshift
  • Java/Spring MVC
  • Python

Data Engineering

  • SQL
  • Database Design
  • Data Pipelines
  • ETL
  • AWS Glue

Web Development

  • JavaScript
  • React
  • Flask
  • HTML
  • CSS

Development Tools

  • Git
  • Linux/Unix
  • CI/CD
  • GitHub Actions
  • Bash

Data Science & ML

  • R
  • TensorFlow
  • Pandas
  • Statistical Analysis

Get in Touch

I'm always interested in hearing about new opportunities, collaborations, or just having a chat about technology and software engineering.

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