Brian Ji

Senior Site Reliability Engineer

• Migrated our API from long-lived EC2 instances to immutable Docker containers deployed to ECS via GitHub Actions CI/CD, reducing scale-out and deployment times by 50% and eliminating a failure mode where unhealthy EC2 instances prevented rolling back in-place deployments.

• Reduced multiple API endpoints’ p95 response times by 80% and increased throughput by 50% without additional compute by introducing DTOs to prevent API overfetching, optimizing database queries, and smoothing traffic spikes using rate-limited client polling with randomized jitter.

• Identified and fixed multiple critical-severity vulnerabilities, and led initiatives with engineering/security leadership alignment to ensure we align to SOC 2 Type II security requirements in preparation for future HITRUST audits.

• Led self-hosted architecture and deployment for an open-source Mirth Connect application cluster, enabling external health system partnerships via EHR integrations for clinical data. Avoided $100k/yr in enterprise licensing cost by implementing alternatives to the vendor’s paid high-availability plugin.

• Led multiple outage/availability and security incidents - including drafting/releasing necessary hotfixes, root cause analysis, coordination/collaboration with external parties, documenting incident timelines, and conducting retrospectives/post-mortems.

• Led a project consolidating 7 backend, frontend, and npm package repos into a single monorepo with a trunk-based development git branching strategy. Resulted in 80% lower effort to deploy code to production, eliminated many merge conflicts, guaranteed consistent code versions promoted through environments, and eliminated repo context switching for developers during PR reviews.

• Optimized unit/integration tests to run ~80% faster (15min → 3.5min) locally and in CI via removing unnecessary integration test DB truncates and parallelizing test jobs in GitHub Actions. Implemented automation for QA-defined Playwright E2E tests on critical path user flows on each merged PR.

• Rolled out Codex and Claude with HIPAA compliance, including automated PR reviews that provided fast initial feedback on all PRs within 5 minutes, also providing references for human code reviews.

• Implemented automated tooling, scripts, and documented processes to simplify developer setup of our API, web, and DB, resulting in a <30min local environment setup time for new engineers.

Senior/Staff Site Reliability Engineer

• Refactored asynchronous task architecture using Terraform, SQS, ECS, and Python (Celery) resulting in 100-400% throughput increases, 50% cost reduction, and 50% lower average queue message age.

• Proactively load-tested APIs ahead of the largest product launch for the company to identify failure modes and poor-performing endpoints. Refactored endpoints and tuned infrastructure sizing/scaling to result in a 50-300% increase in throughput, which successfully supported millions of daily API requests from 200k+ users during the launch while meeting all SLOs.

• Architected and implemented a high-throughput one-time password authentication flow using Amazon Cognito Custom Authentication and AWS Lambda triggers to support 3x auth concurrency requirements ahead of a large product launch. Also implemented external SAML SSO integrations.

• Identified and eliminated $100k/year in unnecessary AWS spend through leveraging RDS Aurora Serverless V2, ECS Fargate Spot, and API scaling improvements.

• Migrated CI/CD pipelines from Travis CI to GitHub Actions, reducing build/deploy times by 50%, costs by 50%, and automating all previously manual deployments of frontend Vue.js repos.

• Implemented observability architecture via automated API integration tests, Sentry tracing, CloudWatch metrics/alarms with PagerDuty, resulting in 100% SLA compliance and lower incident MTTR.

• Led implementations for critical SOC 2 Type II, HIPAA, and HITRUST audits to enable sales partnerships/contracts with large healthcare organizations, brokers, and benefits administrators.

Senior DevOps Engineer

• Led infrastructure, security, and CI/CD initiatives for a 25-person healthtech startup, including managing one direct report and contributing to technology strategy and roadmap.

• Automated mobile app deployment pipelines using Fastlane and GitHub Actions, reducing deployment times by 50% and eliminating manual developer Xcode mobile app build processes.

• Led SSO, MFA, MDM, and EDR implementation and led a successful SOC 2 Type II external audit.

DevOps Engineer

• Led end-to-end AWS migration from DigitalOcean for a telehealth startup client, ensuring SOC 2 compliance and full cutover completed within a 6-week timeframe.

• Developed AWS account automation supporting 100+ AWS accounts using AWS permissions boundaries and automated multi-account networking for a large healthcare technology client, using CloudFormation, CodePipeline, Python, and Service Catalog across 100+ AWS accounts.

• Advised a large public biotech client on IAM security, deploying Azure AD MFA with Conditional Access, and deployed automated identification/remediation of stale accounts, saving $200k/year in licensing.

• Led cloud modernization projects using Azure Automation and Office 365 security tools.

Information Technology Specialist

• Managed IT systems infrastructure supporting 90 employees across five locations in the US. Led multiple internal projects including PowerShell IAM automation, Exchange Online migration, and implementing SIEM dashboards.