Software Engineer's Portfolio - John Walsh

Table of Contents

Skills

  • Programming Languages: Python, JavaScript, TypeScript, Clojure,

  Kotlin, and Ruby

  • Cloud Computing: AWS, Docker, Kubernetes, and Terraform
  • Software Engineering: DevOps, MLOps, LLMOps, Functional Programming,

  Logging and Monitoring, Microservices Architecture, Object-Oriented   Design, CI/CD, Reactive Programming, Software Telemetry, and   Test-Driven Development

  • Libraries and Frameworks: Proficient with React, scikit-learn,

  TensorFlow, Pandas, Seaborn, Matplotlib, NumPy, SciPy, MXNet, and   OpenAI

  • Tools: Experienced with Apache Kafka, Elasticsearch, Git, Jenkins,

  and Terraform

  • Additional Skills: Automation, Git, GraphQL, HCL, Interpretable AI,

  LaTeX, and Shell Scripting

Experience

defrecord, Boston

Principal Software Developer Jun 2023 - Present

  • Leveraged LLMs to enable agent-driven development and augment software

  engineering workflows.

  • Employed Python, TypeScript, Kubernetes, Terraform, and Google Cloud

  to build robust and scalable cloud-native applications.

  • Skills: Python, TypeScript, LangChain, OpenAI, Kubernetes, Terraform,

  Google Cloud

Chewy, Boston

Staff Software Developer Jul 2019 - Jun 2023

  • Led the development of core pet health and auction services using

  Kotlin, Python, TypeScript, Terraform, and Amazon Web Services.

  • Collaborated cross-functionally to ensure seamless integration and

  delivery of solutions.

  • Leveraged AWS services including ECS, EKS, SNS, SQS, and Aurora to

  develop robust and scalable cloud-based solutions.

  • Provided build infrastructure for React and Vue.js applications.
  • Employed infrastructure as code best practices using Terraform.
  • Adhered to established standards around code quality, testing, and

  maintainability.

  • Skills: Kotlin, Python, TypeScript, Amazon Web Services, Terraform,

  GraphQL, Shell Scripting

Saylent, Boston

Senior Software Developer (Lead) Mar 2017 - Jul 2019

  • Led machine learning model development and data pipeline optimization

  using scikit-learn, MXNet, TensorFlow, and AWS SageMaker.

  • Built scalable solutions using Python, Angular, Spring Boot, OpenAPI,

  and Ansible.

  • Designed and implemented CI/CD pipelines leveraging Ansible and AWS.
  • Applied machine learning to improve customer relationships and

  satisfaction in the financial sector.

  • Skills: Machine Learning, Scala, scikit-learn, Amazon ECS, Apache

  Kafka, Python, AWS

Engineering Consultant

Feb 2015 - Mar 2017 Independent, Cambridge, MA

  • Led software development projects applying methodologies like Agile

  and DevOps.

  • Improved customer analytics and experience through data science and

  machine learning techniques.

  • Designed and implemented blockchain and cloud-based solutions,

  demonstrating expertise across multiple domains.

  • Skills: Data Visualization, Python, TypeScript

Developer & Co-Founder

Oct 2015 - Oct 2016 BetterFood, Cambridge, MA

  • Co-founded a technology company focused on improving health outcomes.
  • Led development of core platform and offerings using Clojure, Python,

  and AngularJS.

  • Designed and built a sophisticated recommendation system leveraging

  machine learning techniques.

  • Skills: ClojureScript, Python, Clojure

Director of Engineering

Jan 2014 - Mar 2015 Booster LLC, Boston

  • Managed engineering team and product development lifecycle.
  • Expanded engineering capacity and optimized team productivity.
  • Provided engineering support enabling faster product delivery.
  • Skills: Ruby, JavaScript, Ruby on Rails

Senior Software Engineer

Apr 2012 - Jan 2014 BlueKai, Seattle

  • Designed and built core components of data management platform.
  • Implemented comprehensive tag management solution.
  • Led development of JavaScript and mobile SDKs.
  • Skills: Ruby, JavaScript, Ruby on Rails

Senior Software Developer

Dec 2001 - Apr 2012 Classmates.com, Seattle

  • Developed solutions applying Java, JSP, JavaScript, and related

  technologies.

  • Focused on security, performance, and DevOps best practices.
  • Skills: Java, JavaServer Pages, JavaScript

System Administrator

Dec 2002 - Oct 2003 Redfin.com, Seattle

  • Provided Linux, Apache, and Bugzilla expertise for core

  infrastructure.

  • Skills: Linux, Apache, Bugzilla

Web Developer

Oct 2000 - Dec 2001 Methodologie, Seattle

  • Developed solutions using ASP, JavaScript and related web

  technologies.

  • Skills: ASP, JavaScript

Education

University of Washington 1993 - 1997
BA, Philosophy
Minor in Mathematics
National Merit Scholar

Author: Jason Walsh

j@wal.sh

Last Updated: 2025-07-30 13:45:28

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