Zach Balder


Backend software engineer interested in designing applications and building web infrastructure with availability, scalability, and flexibility in mind.

Technical Skills

LanguagesJavaScript, Python, Go, Bash
FrameworksFastify, Vue, Nuxt, Express, React
DatabasesMongoDB, Redis, DynamoDB, SQLite+Sequelize
Cloud/CDNAWS, Vultr, Linode, Netlify, Vercel
AWSCloudFront, EC2, ELB/ALB, Lambda, S3
ProxiesBurp, HAProxy, HTTP/S, SOCKS+SSH
VPNsWireGuard, OpenVPN, Perimeter 81

Work Experience

TunnelBear, Software engineer

Sep 2021 - Present

    Gatherly, Senior Software engineer

    Nov 2020 - Aug 2021

    Tech: Node+npm, git+GitHub, TypeScript, DynamoDB, React

    • Contributed code and PR review on spatial video-chat app
    • Added logging via Slack webhooks to lower response times
    • Secured cloud resources with VPN in preparation for audit
    • Led frontend migration to CDN to improve performance & UX
    • Automated release process and feature branch deployment
    • Constructed staging environment to QA before production

    Starry, Software engineer

    Jun 2018 - Feb 2020

    Tech: Node+npm, git+GitHub, Docker+Compose, MongoDB, Vue

    • Contributed code and PR review on several projects
    • Built library to make encryption easier for team
    • Created SNMP service to configure field hardware
    • Wrote full-coverage tests and made infra design decisions

    Ujo Music, Software engineer

    Jun 2017 - Nov 2017

    Tech: Node+npm, git+GitHub, IPFS

    • Worked on project for handling linked data in IPFS
    • Made open source contributions to the COALA IP org
    • Collaborated with other team members in agile environment

    Raise Marketplace, Contract developer

    Aug 2016 - Dec 2016

    Tech: git+GitHub, Clojure, Ethereum

    • Collaborated with dev team on Ethereum Blockchain project
    • Picked up Clojure and became familiar with source code
    • Wrote tests and benchmarks for API calls


    Northwestern University

    Sep 2013 - Jun 2016

    Bug Bounty

    • Jul 2020: $2K for bug on Robinhood's HackerOne
    • Apr 2020: $750 for bug on Robinhood's HackerOne
    • Mar 2020: $150 for bug on Glassdoor's HackerOne


    • Web applications
    • Computer networking
    • Distributed systems
    • Cyber Security
    • Singing / keyboard / saxophone
    • Twin Peaks