Dennis Portello

About Dennis Portello

Hands-on technology leader, architect, and team builder with 20+ years driving cloud, SaaS, and infrastructure modernization for startups and global enterprises. Skilled in modernizing legacy.NET, Java, and Python systems into.NET 6/8+ and microservices architectures deployed on Kubernetes (AKS, EKS, GKE). Experienced in leading Agile teams, implementing real-time data pipelines with Kafka, and automating infrastructure with Terraform, CloudFormation, Jenkins, GitHub Actions, and AWS CodePipeline.Expertise spans multi-cloud platforms (Azure, AWS, GCP, Coreweave), AI/ML workload orchestration (Rust-based NLP models, GPU optimization, GDPR-compliant SaaS pipelines), and observability strategies (Datadog, Dynatrace, Grafana, OpenTelemetry). Proven ability to align architecture with business goals, reduce infrastructure overhead, and accelerate delivery.Former founder and CTO, with experience scaling teams of 25+ engineers, building SaaS platforms (low/no-code ETL, BI pipelines), replatforming high-performance compute workloads, and advising on digital transformation across industries including financial services, biotech, energy, and e-commerce. Known for balancing hands-on architecture with strategic leadership, ensuring technology decisions drive measurable impact.

Experience

1. Founder, Owner

   Good Col Technologies

   Jan 2023 — Present

   Led modernization of enterprise-scale.NET systems while working with clients like United Wholesale Mortgage (largest U.S. mortgage wholesale lender), working with Egen.ai, a leading AI Google Cloud partner, data analytics, & customer engagement. Supported modernization & integration efforts for Integra Loan Origination System, helping streamline loan processing workflows & align legacy systems with modern.NET microservices architecture. Migrated legacy.NET 4.x apps & built.NET 6/8+ microservices containerized for Azure Kubernetes Service. Introduced Kafka enterprise-wide, developed real-time data patterns, & provided architectural consulting to reduce system load. Deployed Rust-based AI workloads to AKS & provisioned clusters using Terraform. • Led the strategic migration of microservices & legacy monolithic applications (.NET, Java, Python) from Tanzu on vSphere to Google Kubernetes Engine Autopilot, improving performance & reducing infrastructure overhead. Automated infrastructure provisioning & deployment using Terraform, CloudFormation, Jenkins, GitHub Actions, & AWS CodePipeline.• Replatformed scientific compute workloads for a leading biotechnology company focused on life-threatening diseases, migrating HPC & containerized jobs from bare metal to Kubernetes (EKS/GKE) using SLURM-based schedulers. Improved resource utilization & scalability while exploring distributed file system strategies. Led evaluation and recommendation of observability tools (DataDog, DynaTrace, Grafana + OpenTelemetry).• Extended deployment of Rust-based NLP models from Coreweave (KNative) to Azure Kubernetes Service for enhanced data processing & GDPR-compliant regional hosting requirements. Re-architected workloads as HTTP microservices using Istio/Envoy with Gateway API, configured GPU-based nodes with time-slicing to optimize resource utilization, & implemented telemetry & autoscaling. The models powered a customer-facing NLP SaaS pipeline with client-managed data sources.

Skills

• Mobile Devices
• Team Leadership
• Java
• Data Architecture
• IT Strategy
• Android Development
• Linux System Administration
• Content Distribution Networks
• Software Development
• Python
• Node.js
• Digital Strategy
• Mysql
• Debian
• Open Systems Architecture
• Web Services
• Project Management
• Network Administration
• .net
• Javascript
• Ios Development
• Solr
• E-Commerce
• Hadoop
• Scalable Architecture
• Web Development
• Xml
• IT Management
• Mobile Web
• Oracle
• Redis
• Cloud Computing
• Html
• Amazon Web Services (Aws)
• Technological Innovation
• Meteor
• Rabbitmq
• User Experience
• Digital Innovation
• Mobile Applications