Resume

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Michael A. Johnson Link to heading

linkedin.com/in/michael-codes/
michael@michaeljohnson.codes
Edmond, OK

Summary Link to heading

Senior Software Engineer with 9 years of full-stack experience and recent focus in React Native and Next.js. Shipped features across checkout and servicing flows and led engineering direction across the React Native and Next.js app stack. As tech lead, overhauled release processes and design-system direction, while uplifting front-end observability.

Skills Link to heading

Languages / Frameworks: TypeScript, React Native, Next.js, React, C# (.NET Core), Go, PHP, SQL
Tooling: Docker, Kubernetes, Git, GitHub, Azure DevOps, Playwright, Turborepo, pnpm, Datadog, Dynatrace, Linux

Experience Link to heading

Zip Co
Tech Lead (Mar 2026 - Present)
Senior Software Engineer (Jan 2024 - Mar 2026)

  • Led the front-end implementation of Step-Up Authentication, driving architecture decisions and coordinating with the Fingerprint.js vendor and internal stakeholders to enhance security across all 3 Next.js apps and the React Native app.
  • Shipped ACH repayment flows on the React Native mobile app and served as release manager for the high-priority rollout driving reduced transaction costs across installment repayments.
  • Worked in close collaboration with design to rapidly prototype high-fidelity mobile flows in React Native, producing an in-code prototype of core app flows in a few days to validate app redesign direction.
  • Served as incident commander for high-visibility production incidents and helped maintain 99.95% uptime on critical app transaction flows.
  • Authored the frontend org’s first on-call runbooks and diagnosed cross-system failures across React Native, Next.js, SignalR, and .NET.
  • Drove cross-team execution through design docs and RFCs, including introducing Server Push Events (cutting 3DS completion time from a 157s median to 14.5s and dropping the unknown-outcome rate from 83% to 7%), split into parallel backend, web, and mobile tickets with shared contracts across three teams.
  • Diagnosed and fixed an Optimizely A/B test bucketing bug where an SDK initialization race condition was silently dropping experiment events, restoring decisioning and data integrity for in-production tests analyzed in Amplitude.
  • Scaled team capability through direct mentorship and observability leadership by mentoring engineers through Zip’s formal mentorship program and serving as the frontend org’s de facto Dynatrace FE SME across web and mobile.
  • Aligned engineering and design on early-stage design-system direction by establishing a Terrazzo-based Figma to code token pipeline and authoring a long-term design-token and design-system strategy.
  • Designed and piloted a gated rolling release process with a one-line kill switch, E2E test gating, and an approval-gated bypass, then scaled it from one web app across the platform by comparing deployment-caused incident rates and release stale-time metrics.

Paycom Payroll
Software Developer (May 2017 - Jan 2024)

  • Spearheaded a project to use change events to generate pre-calculated timecard data output, reducing the time needed to pull data for reports and payroll by 97% for 8.4 million employees.
  • Refactored a mission-critical 30,000-line PHP class calculating time card data used to pay 5.9 million employees.
  • Built event-publishing and auditing packages handling a combined 35 million audit records and 2.4 million events per day.
  • Spearheaded JWT authentication for a time clock portal that serves an average of 2.8 million web requests for 300,000 users daily.
  • Pioneered efforts to move individual services out of a monolith and into C# microservices deployed on-premises using Kubernetes, Helm, and Hashicorp Vault serving over 30,000 clients with a combined 8.4 million employees.
  • Researched and proposed using gRPC instead of JSON over HTTP for a service resulting in 2.3x more requests per second and 1.8x faster 90th percentile response times.

Education Link to heading

B.S. in Computer Science, 2017
Oklahoma Baptist University