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Michal Lemczyk

@michallemczyk

Software architect and technical lead at ION, where I implemented enterprise SSO federations and designed OpenFGA-backed authorization for ICAS.

Canada

Message

At ION, I worked on ICAS, an enterprise identity product serving corporate tenants. I set up enterprise SSO federations with SAMLv2 and OIDC, designed OAuth2 authorization logic populated from OpenFGA, and handled client integrations and technical support.

At Wall Street Systems, I helped grow IBAM from 4 to 100 corporate tenants and re-architected it for stateless clustering and horizontal scaling. I also cut build times from 30 minutes to under a minute and built automated test and deployment pipelines.

Experience

Work history, roles, and key accomplishments

Technical Product Owner

ION

Jan 2021 - May 2026 (5 years 4 months)

Owned technical direction for an enterprise identity product, setting up SSO federations and designing authorization logic. Reduced developers' support load from 50% to under 5% and maintained zero production incidents.

SAML OIDC OAuth OpenFGA ADFS PowerShell Microsoft Entra External ID Technical Product Ownership Agile Scrum

Team Lead | Architect

Wall Street Systems

Aug 2013 - Jan 2021 (7 years 5 months)

Led a team of 6 developers on a multi-tenant SaaS application, growing tenants from 4 to 100. Re-architected the application to be stateless and clustered, cutting build times and improving performance.

Java Spring Framework Hibernate Tomcat Stripe JavaMelody Maven Jenkins SonarQube Docker Vagrant AWS Ansible Agile Scrum Jira Confluence

Developer

Wall Street Systems SARL

Jan 2008 - Jan 2013 (5 years)

Led expertise transfer on a large Java cash management module, resolving complex issues and training a new team of developers.

Java Cash Management Swift BAI Training Technical Leadership

Developer

Wall Street Systems

Jan 2007 - Jan 2008 (1 year)

Built features and downstream integration pathways for core Java web applications.

Java Web Applications Integration

Junior Developer

GuestTek Interactive Entertainment Ltd.

Jan 2006 - Jan 2007 (1 year)

Developed internet, phone, and video solutions for the hospitality industry.

Education

Degrees, certifications, and relevant coursework

Dalhousie University

M.CS, Computer Science (Artificial Intelligence)

2004 - 2006

Grade: GPA 3.98 / 4.00

M.CS in Computer Science with a focus on Artificial Intelligence. Thesis on evolutionary machine-learning classifiers; peer-reviewed papers at EuroGP and GECCO.