Engineering leader who delivers results-focused products to millions, inventing systems and growing the ownership-driven people that ship and sustain them.

19 years in software. 9+ as an EM. Cash App, Amazon, Vistaprint, Microsoft. Exploring Senior EM and Director roles.

Nate Mielnik

Senior EM at Cash App

Tax Server / Engine team

Since Apr 2025

Tenure

19y

software, 9+ as EM

Led teams of

5-30

engineers, managers, product managers, and solutions architects

Mentored

150+

engineers, managers, and product managers

Senior EM

Director of Engineering

Consumer tech, marketplaces, or developer platforms. Remote-first preferred.

Lead with empathy.

Passion over experience.

Extreme candor and transparency.

Measurable, TIME-bound goals.

Fail fast, evolve faster.

  1. Since 2025

    1+ year

    Senior Engineering Manager · Cash App / Block

    Leading the Taxes Product and 8-engineer Tax Engine team. Launched 3 AI products, transformed operational excellence (80% reduction in pages and tech debt), and lifted team output ~60% through AI-tool adoption and innovation.

  2. 2020-2025

    5+ years

    Software Development Manager · Amazon (AWS · Prime Video)

    Led teams of 5 to 14 across three orgs. Launched new RPKI route security system across all AWS routers globally. 0 to 1 creation of Content Experience team, launching new notification platform and A/B testing to 5M+ customers across Mobile, FireTV, and Prime Video devices.

  3. 2013-2020

    7 years

    Senior Manager / Principal Lead Engineer · Vistaprint

    Lead 30-person Design Tech org, and launched greenfield DIY website builder across 20+ engineers, reversing a 3% signup decline into 5% growth. Founded a 4-year mentorship guild that reached 100+ engineers and growing 8 ICs into managers.

  4. 2007-2013

    6+ years

    Senior Software Engineer · Microsoft

    Designed Microsoft Account's two-factor authentication system (500M+ users). Built the enterprise authentication client presented at Microsoft PDC 2008, and authored JS UI framework used across Windows, Xbox, and all Microsoft accounts.

View full résumé →

06 systems

Original systems I invented while leading engineering teams. Several outlived me at the companies that adopted them.

Essays on leadership, coaching, and team building.

Open-Source Development

  • The #1 WYSIWYG Editor on Github

    Digital Tech Days

  • medium-editor: An Open Source Story

    DevCon 2018

  • Semantic Versioning

    Lunch & Learn

  • medium-editor: An Introduction

    Lunch & Learn

Front-End Development

  • How We React

    Digital Tech Days

  • I Read The UI Events Spec

    Lunch & Learn

Authentication

  • Digital SSO-my-god?!

    Digital Tech Days

  • Digital Authentication

    Lunch & Learn

Career Coaching

  • Coaching 101: Why Coaching Is Worth Trying

    Vistaprint Coaching Program

  • Coaching 101: Getting Started

    Vistaprint Coaching Program

  • Coaching 101: Creating Goals

    Vistaprint Coaching Program

Blockchain

  • D is for Dogecoin: An Intro to Blockchain & Consensus

    DevCon 2019

  • From Bitcoin to DogeCoin

    Lunch & Learn

  • An Intro to Bitcoin & Blockchain

    Lunch & Learn

Things I build outside of work. Some are businesses, some are art, all of them are how I stay sharp.

Reach me on LinkedIn. That's the best place to start a conversation. I'm especially open to Senior EM and Director conversations right now.