TonySt. Pierre
Senior Secure Software Engineer
Maine, USA
Secure systems. Clear thinking. Work that holds up.
I design secure, dependable software across web, mobile, and cloud.
TypeScript, React, Next.js, React Native, AWS, security, CI/CD
Shared platform architecture
Profile
I’m a senior secure software engineer based in Maine. My work sits at the intersection of product engineering and systems architecture: shared TypeScript platforms, web and mobile applications, cloud identity and security, multi-tenant systems, and automated delivery. I value clear boundaries, defensive controls, and software that remains understandable as it grows.
Core capabilities
Platform Architecture
- TypeScript monorepos
- shared application and domain layers
- multi-tenant architecture
- platform-specific boundaries
- reusable systems without forced abstraction
Web and Mobile
- TypeScript
- React
- Next.js
- React Native
- responsive web applications
- production iOS and Android applications
Cloud and Identity
- AWS
- Amazon Cognito
- Cloud identity, MFA, session management, and account recovery.
Security, Quality, and Delivery
- CI/CD
- automated testing
- security analysis
- static and dynamic analysis
- penetration-testing remediation
- end-to-end testing
- controlled releases
Regulated Product Systems
- Security-sensitive workflows, regulated product environments, and third-party integrations.
Applied AI and Automation
- Python
- agentic workflows
- structured outputs
- workflow orchestration
- local-first systems
- research and automation pipelines
Technical Leadership
- architecture decisions
- code review
- mentoring
- developer guidance
- cross-functional delivery
- translating product and security requirements into maintainable systems
Selected systems experience
Shared Application Architecture
Architected shared TypeScript systems across web and mobile while preserving platform-specific boundaries.
Production Mobile Platforms
Built production React Native applications for iOS and Android with maintainable platform-specific boundaries.
Multi-Tenant Systems
Designed multi-tenant application platforms with clear configuration, feature, and policy boundaries.
Identity and Security Modernization
Built secure identity and access controls spanning authentication, MFA, sessions, and account recovery.
Automated Web and Mobile Delivery
Established automated delivery across web and mobile with testing, security analysis, and controlled releases.
AWS certifications
Amazon Web Services
AWS Certified Solutions Architect – Professional
Issued June 2026
Amazon Web Services
AWS Certified Solutions Architect – Associate
Issued March 2026