Will Weiss
Verified Expert in Engineering
Full-stack Developer
Boston, MA, United States
Toptal member since March 1, 2019
Colleagues describe Will as a "rockstar" engineer and leader. He is deeply passionate about building valuable software and is comfortable with fuzzy objectives and uncertainty. He uses refined communication skills to ensure that stakeholders' concerns are understood and technical matters are addressed. An expert in a wide range of technologies across the stack with a proven track record, Will would be a valuable leader and contributor for any software team.
Portfolio
Experience
- SQL - 10 years
- JavaScript - 10 years
- TypeScript - 8 years
- React - 7 years
- Express.js - 6 years
- Functional Programming - 6 years
- Bash - 5 years
- Android Development - 3 years
Preferred Environment
Unix
The most amazing...
...project I've created is a points dashboard for ClassDojo that enabled thousands of schools to celebrate positive behaviors.
Work Experience
Software Architect Consultant
LOGjevity Inc.
- Developed an application enabling heads of household to coordinate care for their families.
- Hired and rallied new team members to help build a new application quickly.
- Provided technical consultation and guidance resulting in a new architecture with a savings of over $5,000/month in hosting fees with an expanded feature set.
Chief Technology Officer
Virtual Hospitals Africa
- Built an open source cloud-based patient management platform connecting rural clinics with regional hospitals for streamlined care.
- Developed a WhatsApp chatbot enabling secure 1-time delivery of medications to patients in rural settings.
- Built out CI/CD and testing architecture where a 1GB database is scaffolded and several batteries of full-stack tests run in under two minutes.
Senior Software Engineer
Class Twist Inc. dba ClassDojo
- Developed a points dashboard enabling tens of thousands of schools to celebrate positive behaviors and track the top skills, classes, and students.
- Rolled out a trusted school system that linked schools across the globe with their corresponding address in Google Maps, increasing the rate at which parents could find the correct school for their child.
- Built a type-checked job runner system on top of a Kubernetes architecture that enabled fine-grained execution tracking.
Technical Lead | International Development
Indigo
- Managed development of Android application for taking soy seed orders in Brazil. Major considerations included offline-first support, internationalization, and mobile payments.
- Led team building web application to support Brazilian agriculturalists manage their land holdings and track crop prices across international markets.
- Oversaw sales tools to track performance, usage, and manage authorization among Brazilian growers.
Freelance Web Developer
BugReplay
- Built web extensions for Chrome and Firefox—allowing users to create bug reports by recording their browser’s screen, console, and network traffic.
Web Developer
TCB Analytics
- Designed and implemented data visualizations for wind energy traders to better track price changes and risk in financial instruments over time.
- Created a market research reporting tool with spreadsheet functionality and anomaly detection.
Associate Director | Senior Engineer
Maxwell Health
- Created Tempo: a user interface that has enabled benefits packages to be easily configured for thousands of employers using Node.js, Express.js, MongoDB, React, Redux, and AWS.
- Deployed and supported over a dozen microservices using Docker and Kubernetes.
- Built ETL tool and cron job to load hundreds of thousands of insurance plans nightly from third-party sources using Bash, Node.js, and Kubernetes.
- Helped to create a new payroll system to surface demographic and coverage changes to HR users using event sourcing backed by PHP, DynamoDB, MySQL, and SQS.
- Spearheaded the re-platforming of our benefits shopping experience for employees to allow mobile enrollment, improve usability, and support internationalization using React, Redux, and styled-components.
- Set up and maintained many test suites for various applications using Mocha, Chai, Sinon, Ava, Bats, PHPUnit, and Cucumber.
- Created a search engine for small group medical insurance plans using Elasticsearch, Node.js, Express.js, Mustache, and jQuery.
- Performed load testing to determine possible performance issues prior to product launch using Artillery.
- Built an EDI platform allowing member elections to be synchronized to all major insurance carriers using Python and Pandas.
Experience
Virtual Hospitals Africa | Triage Tutorial
https://za.virtualhospitalsafrica.org/tutorialTempo
Education
Bachelor's Degree in Mathematics
Williams College - Williamstown, MA, USA
Skills
Libraries/APIs
Node.js, React, Chai, Sinon.JS, jQuery, Mustache, Preact, WhatsApp API, Google Maps
Tools
Mocha, Shadcn, AWS SDK, Amazon Simple Queue Service (SQS), JSX, Claude Code
Languages
Kotlin, JavaScript, TypeScript, SQL, GraphQL, Python, Erlang (OTP), Bash, R, Go, CSS
Frameworks
React Native, Express.js, Koa, Redux, Jest, Flutter, RStudio Shiny, Bootstrap, Tailwind CSS
Paradigms
Functional Programming, Agile, HIPAA Compliance, Mobile Development, HL7 FHIR Standard
Platforms
Android, Amazon Web Services (AWS), Linux, Unix, Docker, Firebase, Medplum
Storage
PostgreSQL, MongoDB, CouchDB
Industry Expertise
Project Management
Other
Mobile App Development, Android Development, Software Development, Freelancing, CI/CD Pipelines, AI Tools, Software Architecture, Software Design, Architecture, Full-stack, CTO, Technical Leadership, Enzyme, Web Extensions, Mathematics, User Interface (UI), User Experience (UX), Hybrid Apps, Deno, Google Calendar
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