Senior Full Stack Engineer & Software Architect

Brandon Grey

Senior Full Stack Engineer Software Architect

Houston, TX 346-***-**** **********@*******.*** https://www.linkedin.com/in/brandon-g-03b4a114/ SUMMARY

Senior Full Stack Engineer & Software Architect with 10 years of experience designing secure, scalable, and cloud-native .NET systems across healthcare, financial, insurance, and enterprise consulting environments. Expert in distributed microservices, high-performance REST/FHIR API platforms, multi-model data architecture, SQL optimization, AWS/Azure cloud engineering, and event-driven workflows. Proven record modernizing legacy systems, implementing Terraform-driven IaC, delivering AI-driven analytics, and shipping compliant software in regulated industries (HIPAA, PCI-DSS, SOC2). Backend-focused with strong full-stack capability (Angular/React) and demonstrated leadership mentoring developers and driving architecture decisions. SKILLS

● C#, JavaScript, TypeScript, Python

● ASP.NET, ASP.NET Core, Angular, React, RxJS, NgRx, Telerik & Kendo UI, DDD, CQRS, Clean Architecture

● REST, FHIR, SOAP, GraphQL, OpenAPI, API Gateway, Entity Framework, ADO.NET, Dapper

● Azure Functions, Service Bus, AKS, App Services, Key Vault, Storage, API Management, Front Door

● AWS Lambda, API Gateway, DynamoDB, RDS, SQS/SNS, Kinesis, Cognito, CloudWatch

● Azure DevOps, GitHub Actions, Jenkins, TeamCity, CodePipeline, Docker, Kubernetes, Terraform, Bicep

● MS SQL Server, Azure SQL, Cosmos DB, DynamoDB, PostgreSQL, Redis/ElastiCache, SSIS, SSRS, ETL Pipelines

● xUnit, nUnit, MS Test, Cypress, Moq, FluentAssertions, API + DB Integration Tests, TestContainers

● Agile/Scrum, SAFe, Jira, Kanban, MS Dynamics 365 PROFESSIONAL EXPERIENCE

Cardinal Health, Remote May 2021 – Jan 2026

Senior Full Stack Engineer Software Architect

● Modernized legacy Patient Access & Scheduling Platforms by migrating WebForms apps to .NET 7 microservices, improving uptime for multi-clinic operations using Clean Architecture, DDD, and CQRS patterns.

● Engineered horizontally scalable backend services using ASP.NET Core 7, Entity Framework Core (EF Core) compiled queries, Redis caching, and App Services autoscaling to support 50k+ appointment workflows/month.

● Built FHIR R4-compliant REST APIs enabling secure, real-time interoperability with enterprise EHR ecosystems and third-party clinical providers.

● Developed Azure Function pipelines ingesting 40k+ clinical events/day enabling real-time triage and provider updates.

● Architected multi-model data systems across MS SQL Server, Azure SQL, and Cosmos DB with partitioning, indexing, and consistency tuning.

● Rewrote high-impact stored procedures, optimized execution plans, and tuned T-SQL, cutting clinician dashboard load times by 65%.

● Migrated fragmented React screens to Angular 15 with NgRx, unifying clinician workflow and UI architecture.

● Implemented secure authentication and authorization using Azure AD (Microsoft Entra ID) and OIDC identity to enforce patient-data access rules across clinical apps.

● Added resilient retry/timeout/circuit-breaker patterns to patient and provider sync services, preventing downstream outages.

● Containerized scheduling microservices and deployed to Azure Kubernetes Service (AKS) using Docker, Terraform IaC, managed identities, and blue/green and canary strategies.

● Improved observability using Grafana, Application Insights, log enrichment, and KQL dashboards across over 10 services.

● Established test automation using xUnit, Cypress, Moq and TestContainers-based integration tests with CI/CD quality gates for scheduling & provider APIs, reducing regression defects by 35%.

● Delivered AI-assisted clinical automation using Python, Azure Cognitive Services, including NLP-driven clinical text extraction and triage classification.

● Collaborated with clinical ops, compliance, QA, and mentored junior and mid-level engineers on .NET, Angular, SQL performance, and cloud architecture.

Q2 Holdings, Austin, TX Sep 2018 – Apr 2021

Senior Full Stack Engineer Cloud Engineer

● Modernized core payment-services by migrating monolithic VB.NET project to React and ASP.NET Core microservices hosted on AWS Lambda, EC2 and Kafka, improving authorization & refund reliability for merchants.

● Built PCI-compliant REST APIs for transaction authorization, settlement, refund, and account updates using API Gateway and OAuth2.

● Created SNS/SQS-based processing pipelines ensuring durable financial event handling with zero double-charges.

● Architected multi-model data solutions with DynamoDB (real-time fraud scoring) and Amazon RDS (ledger consistency) using optimal partition strategies.

● Built Kinesis-based ingestion pipelines for streaming transaction analysis, fraud detection, and downstream batch processing.

● Developed high-performance backend logic with Entity Framework Core and Dapper using compiled queries, batching, and controlled transaction scopes.

● Secured APIs and services with Cognito, IAM roles, KMS encryption, key rotation, and granular permission boundaries.

● Reduced RDS load by implementing Redis/ElastiCache caching strategies for high-traffic endpoints.

● Built React merchant dashboards for real-time transaction monitoring, chargeback status, payout cycles, and fraud alerts.

● Created Python ETL pipelines preparing fraud-model datasets.

● Established CI/CD with CodePipeline and Azure DevOps using nUnit tests, integration test suites, static analysis, and automated deployment gating.

GuideOne Insurance, Houston, TX Feb 2017 – Sep 2018 Senior Application Engineer

● Modernized a legacy Policy Administration System (PAS) by transforming SOAP services into REST APIs with standardized DTO contracts, consistent error models, and API versioning.

● Rebuilt PAS modules (quotes, renewals, endorsements) using ASP.NET MVC and Blazor with modular architecture, reusable middleware, and centralized request validation.

● Developed asynchronous billing and rating engines using background services, durable message handling, and idempotent update workflows.

● Refactored SQL Server schemas, stored procedures, indexing strategies, and execution plans powering underwriting, billing, and claims operations.

● Engineered SSIS ETL pipelines consolidating policy, claims, and billing data into analytics-ready structures for actuarial and compliance teams.

● Built rich, interactive UI components using Kendo UI (grids, form builders, filters, scheduling widgets) to streamline high-volume underwriting and policy servicing workflows.

● Developed React-based underwriting dashboards with virtualization, caching, and dynamic risk indicators to improve decision-making efficiency.

● Implemented secure identity and API access patterns using OAuth2, OIDC, JWT hardening, and role-based authorization.

● Built SSRS and custom reporting solutions supporting compliance audits, financial reporting, and operational visibility across underwriting and billing departments.

● Leveraged Azure App Services, Azure SQL, RabbitMQ and configuration-driven deployments to support distributed analytics and reporting workloads.

Credera, Dallas, TX Aug 2015 – Jan 2017

Backend Engineer

● Designed and built greenfield REST APIs using Web API with repository/unit-of-work patterns and structured exception middleware.

● Built DAL layers using ADO.NET and stored procedures optimized for OLTP workloads.

● Developed Knockout.js MVVM dashboards and admin consoles for multi-warehouse retail operations.

● Integrated FedEx/UPS APIs for real-time shipping, SLA monitoring, and exception routing.

● Delivered AWS-backed serverless workflows using Lambda, SQS, S3, and RDS for scalable data processing.

● Improved SQL Server performance through stored procedure tuning, indexing strategies, query profiling, and SSIS enhancements.

● Participated in full SDLC - architecture, sprints, demos, UAT, release preparation, and production support. EDUCATION

Bachelor of Science (BS), Computer Science

Texas A&M University 2011 - 2015

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