Lead software engineer and SRE. I work at the seam between the application and the platform it runs on — Rails on AWS Lambda, Terraform at fleet scale, and Flutter apps I ship myself.
Atlanta, GA · jparrack.com · LinkedIn · jeremiahlukus1@gmail.com
I run most of these in production, which is why I contribute upstream to them.
| Project | What I contributed | |
|---|---|---|
| Lamby — run Rails on AWS Lambda |  |
Rack 3 support, carried the gem from Rails 7.1 to 8.1 and onto Ruby 3.4 / Bundler 4, graceful shutdown on SIGTERM |
| Crypteia — Rust Lambda extension that preloads secure env vars |  |
Remediated GHSA-82j2-j2ch-gfr8, a denial-of-service in rustls-webpki; Rust toolchain upgrade; fixed multi-architecture ARM releases |
| Lambdakiq — ActiveJob on SQS + Lambda |  |
Modernized CI, added the release workflow, moved the gem to Ruby 3.4 |
| chewie — the community Flutter video player |  |
Removed a spurious iOS simulator warning |
| speckit-skills — spec-driven development plugin for Claude Code | The spec-kit loop over seven stack profiles, plus a checker that resolves every requirement to the test that proves it — because renaming a test leaves the row still looking like proof | |
| authorize_net_plugin — my Flutter payments plugin |  |
Wraps the native Android and iOS Authorize.Net SDKs behind one Dart API. Ten releases, still shipping |
| flutter_template — production Flutter starter |  |
Riverpod state management, authentication flow, structured logging, test harness |
Also small fixes merged into flutter/packages, flutter_chord, collectiveidea/audited, and the Ruby on Jets asset pipeline. Around 3,300 public commits to date.
Designed, built, and shipped end to end — including store submission, signing, and the infrastructure behind them.
| App | Where | |
|---|---|---|
| FlowJitsu — jiu-jitsu training tracker. Offline-first local database that syncs to the cloud. | iOS · Android | 1,000+ users |
| Joyful Noise Tabs — guitar tab and chord library for worship musicians, 6,000+ songs. | iOS | 600+ users |
| Smart Sprout — AI learning companion that adapts material to the learner. | iOS | |
| Pneuma Stream — a curated library of books with AI narration that underlines each sentence as it is spoken and autoscrolls as you listen. | iOS | releasing shortly |
| DoubleShot — macOS menu bar app that tracks what Claude Code costs you and holds the Mac awake mid-run. | macOS |  |
Lead software engineer / SRE at Manheim (Cox Automotive). The work is platform and reliability at fleet scale, and most of it is automation rather than one-off fixes:
- Automated dependency patching. Python tooling that scans an enterprise GitHub organization for outdated AWS service versions — Elastic Beanstalk platforms, Glue, Terraform — opens the upgrade pull requests, flags the badly stale ones, and reports to Slack on a schedule.
- CI standardization. Moved 100+ repositories onto shared GitHub Actions runners and reusable Terraform workflows, retiring per-team Jenkins along the way.
- Data platform. Terraform and AWS Glue ETL pipelines feeding analytics, plus the Snowflake environments underneath them.
- Observability. Structured logging, custom metrics and dashboards, and standardized alerting and secrets management on SSM Parameter Store.
- Scale. Roughly 4,000 commits and 1,000 pull requests across 300+ repositories, plus ~370 code reviews. Those are on internal enterprise GitHub, so they are not reflected in the contribution graph on this profile.
Earlier: sole developer at Stord, where I built the first production version of the multi-warehouse platform. Stord has since raised $777M and reached a $3B valuation.
Languages — Ruby · Dart · Swift · TypeScript · Python · Rust · SQL · Bash
Frameworks — Rails · Flutter · React · Ruby on Jets · Riverpod
Cloud — AWS (Lambda, Glue, RDS, ECS, Elastic Beanstalk, SQS, SSM, VPC, CloudWatch) · Terraform · CDK · SAM · Docker · Snowflake · Firebase
Ops — GitHub Actions · New Relic · Sentry · PostgreSQL · Redis · Elasticsearch