Johann koeh
Open to work13 years experienceSenior Software Engineer
Senior Software Engineer with 13 years of experience in secure, scalable delivery and production reliability.
Standing Rank
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Skills & Technologies
23 skillsGitHub Activity Evidence
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Work Experience
Senior Software Engineer
DoorDash
- Owned DoorDash Storefront execution across web and mobile, supporting secure, scalable reliability for a customer-facing commerce platform.
- Partnered with mobile, frontend, backend, and design teams to monitor production environments, assist with troubleshooting, and drive incident response readiness.
- Focused on performance, operational standards, and access management through reliable session and authentication flows.
Software Engineer
DoorDash
- Engineered Storefront checkout and identity experiences for DoorDash, with strong emphasis on platform reliability and secure delivery.
- Built integrations that reduced operational risk and improved performance, while partnering with Identity and product teams.
- Delivered work that supported secure authentication, monitoring, and faster delivery via CI/CD discipline.
Senior Software Engineer
Illumina
- Developed a customer console and automation systems for Illumina, supporting platform engineering needs for distributed micro-services and operational procedures.
- Built Dockerized test automation frameworks and service monitoring with cloud workflows.
- Collaborated with teams running on Kubernetes-based environments, emphasizing production systems health, troubleshooting, and technical documentation.
Software Engineer 2
Illumina
- Built developer productivity tooling and automation for Illumina testing and release workflows.
- Focused on infrastructure automation and reproducibility using containerized load testing and scripting.
- Partnered with scrum teams to improve operational standards, technical documentation, and reliability of CI-based deployments.
Software Test Engineer 2
Illumina
- Performed black box manual testing during API and UI development and supported end- to-end system integration work.
- Created scripts in bash to automate testing environments and data setup, aligning with agile operational procedures.
- Supported a migration from cloud service to on premise service through careful testing strategy and technical documentation.
Projects
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Leaderboard Standings
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Assessment Highlights
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AI Collaboration Score
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Role Compatibility Profile
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Achievements
Storefront Mobile App Launch
Drove launch of Storefront Mobile App, improving session reliability and access management, generating millions in revenue within 2 months, improving service performance by 200ms.
Checkout Defect Reduction
Cut checkout defects, supporting incident response and monitoring through root cause analysis, reducing checkout errors from 15% → ~3%.
Conversion Rate Improvement
Boosted conversion and production systems stability, collaborating across teams to refine session handling, raising conversion from 75% → 80%+.
Storefront Checkout Migration
Migrated Storefront Checkout into a standalone repo, improving performance and logging, cutting bundle size 5.8MB → 1.9MB, eliminating ~1M redundant calls/day.
CI/CD Workflow Optimization
Improved troubleshooting velocity by reorganizing CI/CD workflows and monitoring, reducing PR turnaround from 3 days → 1 day for checkout changes.
Authentication Improvement
Enhanced reliable authentication by co-developing “Login with DoorDash” and partnering with Identity teams, reducing login errors for Storefront by 94%.
SSO Flow Conversion Increase
Improved checkout conversion with SSO flow and operational procedures, increasing user- account orders by 31%.
Kubernetes Automation Services
Developed Kubernetes-based automation services and platform interfaces, improving reliability of instrument utilization insights by reducing operational interruptions.
Dockerized Test Automation Framework
Created Dockerized Test Automation Framework in C#, improving CI/CD pipeline confidence through repeatable execution for engineers on TeamCity.
Monitoring Automation
Developed monitoring automation using AWS Lambda and Redshift alerts, improving incident response readiness through CloudWatch and SNS anomaly notifications.
ML/ETL Productionization
Collaborated with ML scientists to productionize ETL and NLP visualization, improving troubleshooting time by reducing investigation effort.
Environment Setup Automation
Automated environment setup and test execution with scripting, reducing the 30min-1hour work every 2 weeks to near zero.
Testing Framework Modernization
Modernized and optimized existing testing framework, improving reliability of production systems through a measurable 10x test execution improvement.
Dockerized Load Testing Tool
Developed a dockerized load testing tool hosted on Jenkins, improving performance benchmarking using K6, Grafana, and InfluxDB.
Release Documentation CLI
Created CLI for release documentation workflows, reducing manual overhead every release cycle by 40 hours/month.
About Details
Professional Bio
Senior Software Engineer with about 13 years of experience. Work has emphasized secure, scalable delivery through CI/CD pipelines, Docker, and Kubernetes, paired with careful monitoring and troubleshooting in production environments.
Bachelor's in Bioengineering
University of California San Diego (2008 - 2013)