Elliot Mitchell Signal Playground

Leads teams.Ships Mobile.

Director of Mobile / Android Engineer

I care about motion, spacing, and interaction detail. I also care about the architecture, release systems, and team habits that let great mobile work keep shipping.

Built Android apps for 14 years. Spent the last 6 leading teams, growing engineers, and obsessing over the gap between fast and good - and yes, I still write the code.

High velocity only works when the system stays readable.

Lead close to the code

Direction lands better when architecture, UI detail, and tradeoffs stay visible.

Build teams that ship calmly

Clarity, trust, and standards matter more than performative process.

Think past the mobile layer

The app is one surface in a wider system of APIs, releases, observability, and partner constraints.

A tighter view of shipped apps.

The mobile surface matters, but so do the systems underneath it. This view keeps the work easier to scan without flattening it into a list of logos.

Rill Social

A social hangout app with groups, events, and messaging

View project

Lens Distortions

World class photo editor, 5M+ downloads

View project

Mach Energy

Energy monitoring application for real estate

View project

Lucra Sports

Gaming B2B SDK, compliance and wallet management. Powering apps like Backyard Sports, Dave & Busters, and 5iron Golf.

View project

Microsoft Flip

5M+ downloads, powered the central camera SDK used in Teams, GroupMe, and Skype

View project

LiveSafe

Campus and workplace safety platform, 500k+ downloads

View project

The stack, grouped by what it moves.

Android stays at the center. The surrounding work reaches build systems, SDK design, cloud services, testing, and release operations.

Mobile UI craft

Compose, view systems, motion, and the details people feel before they can name them.

Platform decisions

SDK design, modularization, dependency strategy, and architecture that survives real teams.

Leadership systems

Hiring, mentoring, clear feedback, and keeping quality intact while speed stays high.

Android and UI

Kotlin • Java • Jetpack Compose • XML/View-based UI • Camera SDK • Google Play Billing • Bluetooth LE

Architecture and testing

Hilt/Dagger • SDK Architecture & Publishing • Modular Build Systems • JUnit • Robolectric

Release and platform systems

CI/CD (Bitrise / GitHub Actions / GitLab CI / Jenkins) • Firebase • AWS • Cloudflare • New Relic • App Center

Cross-platform and web

Swift • React • React Native • JavaScript • TypeScript • Node.js

Roles across shipping, scaling, and leading mobile teams.

A quick read on the companies, roles, and kinds of mobile problems I have spent time solving.

Jul 2024-Present

Lucra Sports

Director of Mobile

Built Android app end-to-end in 6 months; architected SDK for third-party distribution

Jan 2021-Jul 2024

Microsoft

Sr. Engineering Manager, Android

Led Camera SDK integration across Teams, Xbox, Snapchat, GroupMe and Flip

May 2017-Present

Freelance

Principal Android Engineer

Lens Distortions, Mach Energy - multi-million user scale

Apr 2020-Dec 2020

LiveSafe

Sr. Android Engineer

Shipped to 350k+ devices

Jan 2020-Apr 2020

Outdoorsy

Sr. Android Engineer

Nov 2018-Dec 2019

Nerdery

Sr. Android Engineer

Bluetooth LE glucose monitoring

Jul 2017-Nov 2018

Spreetail

Android Engineer

Offline-first fulfillment tooling

Apr 2016-Jul 2017

Varsity Tutors

Android Engineer II

Live video tutoring

Nov 2012-Apr 2016

Sandhills Publishing

Lead Android Engineer