Principal Engineer / Fractional CTO | Agentic AI, Digital Twins, Multi-Agent Systems
LinkedIn: linkedin.com/in/fszalewicz | Email: fszale@gmail.com | GitHub: github.com/fszale | Consulting: solidcage.com
Macomb, MI | Open to Remote Work
Principal engineer and Fractional CTO with 20+ years of experience building SaaS platforms, data systems, AI products, and cloud infrastructure. Current focus is agentic-first transformation: designing digital twins, multi-agent systems, and Agentic OS patterns that help organizations adopt AI directly inside active delivery workflows. Partner with executive leadership, technical leaders, and engineering teams to train AI best practices, implement governance and human-in-the-loop controls, and accelerate measurable outcomes across product and operations. Recent work includes organizational transformation for a 150-person technology company, agent-powered SaaS for data analysis and lead intelligence, and delivery acceleration such as compressing the timeline for vizly.ai from 9 months to 3 months.
- Agentic AI Strategy & Transformation - AI adoption strategy, operating models, organizational change, delivery acceleration
- Digital Twins & Multi-Agent Systems - twin design, agent factories, agent orchestration, context design, workflow decomposition
- Agentic OS & Workflow Automation - ecommerce and business workflow automation, human-in-the-loop approvals, guardrails, self-improvement loops
- Agent-Powered SaaS & Data Products - AI-assisted analytics, exploration, lead intelligence, signal enrichment
- AI Governance & Evaluation - approval flows, auditability, guardrails, feedback loops, measurable outcomes
- Cloud Runtime Engineering - Python, FastAPI, Node.js, Next.js, Supabase, Docker, Kubernetes, Cloud Run, AWS, GCP, Azure
- Data & ML Platforms - ETL/ELT, Airflow, Spark, BigQuery, SageMaker, data lakes, warehouses, reporting, analytics
- Leadership - executive partnership, architecture, team leadership, mentoring, CI/CD, delivery execution
Solid Cage Inc - Macomb, MI
Principal Consultant, Agentic AI & Fractional CTO | 2024 - Present
- Lead agentic-first transformation programs for multiple clients, including a 150-person technology company, partnering with executive leadership, technical leaders, and engineering staff to accelerate AI adoption across the organization.
- Train leaders and delivery teams on practical AI best practices, workflow redesign, and operating models that embed AI directly into projects already in flight instead of isolated experiments.
- Drive development and adoption of digital twins in preparation for agent factory deployment, defining roles, context, guardrails, and governance patterns for production use.
- Architect Agentic OS patterns for end-to-end ecommerce workflow automation using human-in-the-loop approvals, guardrails, structured context, and self-improvement loops.
- Work as a change agent across multiple businesses, helping teams rapidly adopt AI in ways that increase throughput, compress delivery cycles, and create visible product outcomes.
- Built and open-sourced reusable agentic infrastructure and adoption assets, including agent-kernel, agent-factory, agentic-playbook, and operational-intelligence-lab.
- Built and advised on agent-powered SaaS products including vizly.ai and Data Reaktor, including compressing the vizly.ai delivery timeline from 9 months to 3 months.
Solid Cage Inc - Macomb, MI
Principal Consultant & SaaS Founder | 2009 - 2023
- Founded and scaled consultancy delivering 50+ SaaS, data, and analytics solutions with 95%+ client retention.
- Architected PathGnos for Mayo Clinic, an Azure-based digital pathology archive supporting DICOM/SVS formats, Cosmos DB storage, CI/CD, and high availability.
- Designed and deployed web applications, data pipelines, data marts, dashboards, and reporting systems for SMB and enterprise clients.
- Advised teams on cloud adoption, engineering execution, ETL practices, and secure architecture across healthcare, fintech, and SaaS environments.
Shoptelligence - Ann Arbor, MI
Vice President of Engineering | 2022 - 2025
- Architected a 15+ TB data lake and warehouse platform, reducing analytics retrieval from 3+ weeks to 1 day.
- Built ETL pipelines with Airflow, Spark, Data Fusion, and BigQuery, boosting integration speed by 75% and supporting $1M+ ARR growth.
- Established data quality standards and CI/CD practices that reduced support tickets by 500%.
- Expanded an omni-channel retail SaaS platform with AI-assisted personalization and modern data architecture.
West Monroe Partners - Chicago, IL
Senior Architect | 2021 - 2022
- Delivered data strategy, warehouse design, and analytics modernization programs for private equity clients.
- Trained consultants in SQL, Python, and data architecture practices.
Rocket Mortgage (Quicken Loans) - Detroit, MI
Principal Engineer / Team Lead, Data Science | 2017 - 2021
- Architected a petabyte-scale data lake and ELT platform using AWS Glue, Spark, and Cloudera, reducing annual cost by more than $1M.
- Led enterprise data fabric and MDM integrations that improved compliance and increased loan volume by 10%+.
- Operationalized ML platforms on AWS using SageMaker, Lambda, and Athena for fraud detection and risk modeling.
- Mentored 50+ engineers on ETL, Spark, AWS, and CI/CD; recognized with the "Automate All the Things" award in 2020.
360ofme Inc - Royal Oak, MI
CTO / Principal Engineer | 2016 - 2017
- Designed a high-volume SaaS platform for secure personal data management using Node.js, MongoDB, PostgreSQL, and RabbitMQ.
- Established CI/CD automation and real-time monitoring across AWS and Heroku environments.
Earlier Roles | 1993 - 2016
- Healthmaster Holdings - Built SaaS medical software for K-12 schools and EDI medical billing systems using 837/835/997 healthcare transaction flows.
- imX Solutions - Lead developer for a patented secure digital payments and authentication platform.
- LogicaCMG / JDM Systems / New Wave Software - Delivered reporting, integration, ERP, and plant-floor systems for enterprise and industrial clients.
- agent-kernel - Reusable digital twin knowledge layer with agent skills, prompts, templates, diagrams, and automation for consistent execution.
- agent-factory - FastAPI runtime for hosting digital twins with model routing, Supabase-backed persistence, admin governance, and Cloud Run deployment patterns.
- agentic-playbook - Role-based adoption layer for engineers, architects, executives, compliance leaders, and power users implementing agentic AI.
- operational-intelligence-lab - Open methodology connecting AI implementation to rate-of-improvement, ROI modeling, training, and business deployment.
Languages & Frameworks: Python, SQL, Java, Node.js, Next.js, TypeScript, JavaScript, C#, FastAPI
Agentic / AI: AI agents, digital twins, multi-agent systems, Agentic OS, OpenAI, Anthropic, xAI/Grok, prompt design, context engineering, HITL, guardrails, evaluation loops
Cloud Platforms: AWS (EC2, Glue, S3, Lambda, SageMaker, Athena, QuickSight), GCP (BigQuery, Data Fusion, Vertex AI, Airflow, Looker, Kubernetes, Cloud Run), Azure (Cosmos DB, Web Apps, Functions)
Data Technologies: Data lakes, data warehousing, ETL/ELT, Airflow, Data Fusion, Spark, Hadoop, Hive, PostgreSQL, MongoDB, DynamoDB, SQL Server, MySQL
DevOps & Tools: Git, Jenkins, GitLab, Docker, Kubernetes, Terraform, Maven, CircleCI, Azure DevOps, n8n, Supabase, TDD, Agile/Scrum
Analytics & BI: Tableau, Looker Studio, Power BI, semantic layer design, KPI dashboards
Compliance: HIPAA, CCPA, GDPR-aligned data practices, EDI, DICOM
- System, Method, and Apparatus for Conducting Secure Online Monetary Transactions
- Optical Disc Design Patent
- AWS Certified Developer - Associate (2018)
- AWS Certified Solutions Architect - Associate (2018)
- Microsoft Certified Professional: Requirements & Solution Architecture (2000)
- Oakland Community College - Associate's in Computer Information Systems
- University of Phoenix - Information Systems Management coursework
- Ongoing professional development in cloud, ML, data engineering, and agentic AI systems
- GitHub: https://github.com/fszale
- LinkedIn: https://www.linkedin.com/in/fszalewicz/
- Medium: https://medium.com/@filipszalewicz
- YouTube: https://www.youtube.com/@Control-The-Outcome
- Solid Cage: https://www.solidcage.com