$ whoami

Daniel Nicolas Graham

Senior Python Developer

$ skills

PythonDjangoFastAPIFlaskDRFPostgreSQLMongoDBRedisAWSAzureTerraformDockerKubernetesCeleryOAuth2/JWTPrometheusGrafana

Experience

Senior Python Developer — HCA Healthcare

Jun 2022 – Mar 2025 · Remote

Designed, built, and operated secure, cloud-native healthcare microservices managing 1M+ patient records.

  • FastAPI microservices for ingestion, transformation, and distribution of patient data
  • OAuth2/JWT authentication and RBAC; HIPAA and SOC 2 compliant
  • Migrated monoliths to AWS (EC2, S3, RDS, Lambda) for scalability and resilience
  • Dockerized services orchestrated via Kubernetes; zero-downtime deployments
  • CI/CD with GitHub Actions and Jenkins; automated testing and gating
  • Monitoring with Prometheus, Grafana, and CloudWatch; 40% faster incident response
  • PostgreSQL and MongoDB performance tuning and schema optimization
  • 95% test coverage with pytest and Selenium; robust unit, integration, and e2e suites
PythonFastAPIAWSDockerKubernetesPostgreSQLMongoDBOAuth2JWTGitHub ActionsJenkinsPrometheusGrafanaCloudWatch

Senior Python Developer — Optum

May 2019 – May 2022 · Remote

Led Django/DRF backend development for analytics platforms with secure EHR integrations.

  • Versioned REST APIs serving real-time and batch workloads
  • HL7/FHIR interfaces for integrations with Cerner and EPIC
  • Celery with Redis for asynchronous jobs and scheduled orchestration
  • Azure Functions and Blob Storage powering event-driven pipelines
  • Terraform-provisioned AKS; observability with Azure Monitor and Grafana
  • PostgreSQL tuning: indexes, partitioning, and stored routines
  • Pre-commit, mypy, flake8 enforced via GitHub Actions
  • Mentored devs; led sessions on performance tuning and cloud architecture
DjangoDRFAzureAKSCeleryRedisTerraformPostgreSQLHL7FHIRAzure MonitorGrafana

Python Developer — Improving

Jun 2017 – Apr 2019 · Hybrid

Built internal tools and customer portals with Django, DRF, and Vue.js.

  • REST APIs for financial analysis, order tracking, and user management
  • Authentication, role-based permissions, and audit logging
  • Celery + Redis for distributed tasks and asynchronous reporting
  • Dockerized dev/test environments; Docker Compose for local stacks
  • Azure infrastructure via reusable Terraform modules
  • PostgreSQL performance improvements delivering 60% faster dashboards
  • Frontend tests with Jest; backend tests with pytest
  • Documentation and SOPs for Azure DevOps CI/CD
DjangoDRFVue.jsCeleryRedisDockerAzureTerraformPostgreSQLJestpytest

Junior Full-Stack Python Developer — Headspring

Jun 2015 – May 2017 · Onsite

Full‑stack development with Flask and React for HR, payroll, and internal reporting tools.

  • Built and consumed REST APIs for CRUD and reporting dashboards
  • Integrated legacy XML/SOAP services into modern RESTful pipelines
  • Improved UI accessibility and cross‑browser compatibility
  • SQL query authoring and migrations for MySQL and PostgreSQL
  • CircleCI and Git hooks to automate testing and staging deploys
  • Automated ETL for CSV/Excel ingestion into normalized databases
  • Linux deployments with Bash scripting and log management
  • Swagger/OpenAPI documentation; Confluence knowledge base
FlaskReactBootstrapRESTSOAPMySQLPostgreSQLCircleCIBashETLOpenAPI

System Architecture & Projects

Healthcare Data Platform (HCA Healthcare)

Cloud-native microservices handling 1M+ patient records with secure data ingestion, transformation, and distribution.

Key Achievements:

  • FastAPI microservices with OAuth2/JWT and RBAC (HIPAA, SOC 2 compliant)
  • AWS migration of monolith to microservices on EC2, S3, RDS, and Lambda
  • Kubernetes orchestration with zero-downtime deploys via GitHub Actions/Jenkins
  • Observability with Prometheus, Grafana, and CloudWatch; 40% faster incident response
  • PostgreSQL and MongoDB query tuning and schema optimization
PythonFastAPIAWSDockerKubernetesPostgreSQLMongoDBPrometheusGrafana

Analytics & Integration Services (Optum)

Django/DRF services powering clinical and insurance analytics with secure EHR integrations via HL7/FHIR.

Key Achievements:

  • Versioned REST APIs serving real-time and batch workloads
  • Celery with Redis for async job orchestration and scheduled tasks
  • Azure Functions and Blob Storage for event-driven pipelines
  • Terraform-provisioned AKS with GitHub Actions CI/CD and policy gates
  • PostgreSQL tuning: indexes, partitioning, and stored procedures
PythonDjangoDRFCeleryRedisAzureAKSTerraformPostgreSQL

Internal Tools & Portals (Improving)

Django + Vue.js applications for financial analysis, order tracking, and user management.

Key Achievements:

  • Role-based permissions and audit logging for enterprise controls
  • Distributed tasks with Celery/Redis; Dockerized dev/test environments
  • Azure infrastructure via reusable Terraform modules
  • Performance improvements: 60% faster dashboards through optimized queries
DjangoDRFVue.jsCeleryRedisDockerAzureTerraformPostgreSQL

Impact & Achievements

System Performance

API Gateway

  • • Reduced P95 latency for critical endpoints by 40%
  • • 99.99% availability across microservices
  • • 1M+ patient records processed securely (HIPAA)

Database Optimization

  • • Query response time improved by 60% via index/partition tuning
  • • Optimized schemas across PostgreSQL and MongoDB
  • • Reduced DB load by 40% through caching and batching

Infrastructure & DevOps

Cloud Infrastructure

  • • Zero-downtime deployments on Kubernetes
  • • Automated scaling for 20+ services (AWS & Azure)
  • • Infrastructure as Code with Terraform and Helm

CI/CD Pipeline

  • • CI/CD with GitHub Actions/Jenkins; blue/green and canary strategies
  • • Automated testing coverage at 95% (pytest, Selenium)
  • • Pre-commit, mypy, flake8, Black enforced in pipelines

Development & Leadership

Code Quality

  • • Enforced code quality with TDD and coverage gates
  • • Auth/RBAC hardening to meet HIPAA/SOC 2
  • • Documented APIs and ADRs for onboarding

Team Impact

  • • Mentored and guided junior engineers via reviews and pairing
  • • Led monolith-to-microservices migrations (AWS & Azure)
  • • Built system health dashboards (Prometheus, Grafana, CloudWatch)

$ contact --info

Let's Connect

$ location --current

Spring, TX

$ contact --email

daniel.ni.graham@gmail.com

$ contact --phone

+1 936 356 4515