Nikolaos Seitz
Verified Expert in Engineering
Solution Architect and Developer
Wormleysburg, PA, United States
Toptal member since February 19, 2025
Nikolaos is a senior enterprise cloud solutions architect with over 20 years of experience designing, developing, and delivering enterprise-level solutions. He has a strong background in cloud platforms, microservices, and API integrations. With a proven ability to lead and mentor teams, Nikolaos consistently delivers results on time and within budget.
Portfolio
Experience
- JavaScript - 20 years
- IT Management - 15 years
- Azure - 15 years
- ETL Tools - 15 years
- C#.NET - 15 years
- Information Systems - 15 years
- Serverless Architecture - 10 years
- Operations - 5 years
Availability
Preferred Environment
Azure, Google Cloud Platform (GCP), Oracle, Auth0 API, Facebook API, Facebook Ads API, Document Automation, PDF/A, iText, ExifTool, GhostScript, PHP, MySQL, HTML, CSS, Coding, Back-end Development, Full-stack Development, Data Entry, HIPAA Electronic Data Interchange (EDI), Microservices, REST APIs
The most amazing...
...solution I've built from conception through production is the EQIBank banking platform, where I leveraged Google Cloud Platform (GCP).
Work Experience
Senior Enterprise Solution Architect
Freeman
- Designed and developed hybrid cloud solutions using Azure, Adobe, and Confluent technologies.
- Provided strategic planning of technology roadmaps based on stakeholder objectives and conducted high-level architectural discovery and solution diagramming.
- Assumed product ownership over Adobe Workfront and Adobe Workfront Fusion.
- Maintained an in-depth understanding of business processes, needs, and objectives.
- Served as a key member of the enterprise architecture review board (ARB) and led initiatives to adhere to compliance standards and security best practices to protect PII data in conjunction with cross-functional teams.
Senior Enterprise Architect
EQIBank
- Built a secure banking portal on GCP with Swift, Plaid, and crypto API integrations, implementing OAuth 2 authentication and RBAC while optimizing performance for seamless financial transactions.
- Designed a Snowflake-based data warehouse, architected ETL workflows, and built scalable cloud infrastructure handling 30,000 transactions per second, ensuring compliance with GLBA, SOX, and PCI DSS.
- Led hybrid cloud projects across GCP, Azure, and AWS, overseeing Agile offshore teams, developing banking-as-a-service enterprise APIs, and integrating banking services with corporate digital credit card issuance.
Senior Solution Architect
Rite Aid
- Led microservices-based .NET architecture, integrating McKesson batch orders for millions of pharmaceutical deliveries while optimizing order processing and ensuring seamless next-generation pharmacy operations.
- Built CI/CD deployment pipelines across on-premise and Azure solutions, improving development efficiency, automating software releases, and ensuring high availability for 1,500 stores and 300,000 pharmacy customers.
- Ensured HIPAA, HITRUST, and NIST compliance, securing sensitive healthcare data while designing scalable infrastructure to support retail and pharmacy digital transformation across multiple locations.
Experience
EQIBank
http://www.eqibank.comEducation
Bachelor's Degree in Business Administration
Bloomsburg State University - Bloomsburg, PA, USA
Skills
Libraries/APIs
React, Node.js, Auth0 API, REST APIs, Facebook API, Google API, iText, Stripe, Facebook Ads API
Tools
Azure App Service, Adobe, Google Compute Engine (GCE), Adobe Experience Manager (AEM), Salesforce Sales Cloud, Plaid, ExifTool
Languages
PHP, HTML, CSS, C#, Java, C#.NET, JavaScript, Python, Go, GraphQL, TypeScript, Swift, Snowflake, GhostScript
Frameworks
.NET, ASP.NET, React Native, Spring Boot, Express.js, Flask, Next.js, OAuth 2
Paradigms
HIPAA Compliance, Microservices, Serverless Architecture, DevOps, Fast Healthcare Interoperability Resources (FHIR), Azure DevOps, Role-based Access Control (RBAC), Agile
Platforms
Azure, Azure Functions, Google Cloud Platform (GCP), Oracle, Twilio, Amazon Web Services (AWS), Firebase
Storage
PostgreSQL, MySQL, Microsoft SQL Server
Other
IT Management, Operations, Product Lifecycle Management (PLM), Information Systems, Adobe Workfront, API Integration, APIs, Apps, Architecture, Full-stack, Data Management, Workflow Automation & System Integration, Technical Leadership, Document Automation, PDF/A, Chatbots, Coding, Back-end Development, Full-stack Development, Data Entry, Startups, HIPAA Electronic Data Interchange (EDI), Logistics & Warehousing, ETL Tools, Large Language Models (LLMs), Back-end, CI/CD Pipelines, Data Engineering, Distributed Architecture, Artificial Intelligence (AI), Apollo, Decentralized Autonomous Organizations (DAO), Business Law, Employment Law, SAP, Google BigQuery, Global Banking, Mobile Banking, Crypto, Business Administration, Banking as a Service (BaaS), Adobe Workfront Fusion, SOX, PCI DSS, Machine Learning Operations (MLOps), Infrastructure as Code (IaC)
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