Senior SaaS Engineer / Fractional Technical Lead (AI-Assisted Development)

Why This Opportunity

Help define a new way of building production software.

We're building a multi-tenant SaaS platform using an AI-assisted development workflow where AI accelerates implementation—but experienced engineering judgment remains the ultimate safeguard. Rather than writing every feature yourself, you'll own the architecture, review critical changes, and ensure every production decision meets the standards expected of enterprise software.

This is an opportunity for an experienced SaaS engineer who enjoys architecture, technical leadership, code review, and making high-impact engineering decisions.

About the Company

We're a founder-led software company building a modern SaaS platform for service businesses with multiple locations. The product combines workflow automation, compliance-sensitive customer communications, AI-powered functionality, and enterprise-grade multi-tenant architecture.

Our engineering approach combines AI-assisted development with disciplined software engineering practices, automated testing, and rigorous technical review to deliver production-quality software efficiently and safely.

Why This Role Matters

You'll serve as the senior technical authority for the platform.

AI can accelerate delivery, but architectural judgment, production readiness, and engineering quality cannot be automated. You'll own the decisions that matter most—from tenancy and security to deployments and production operations—ensuring the platform remains scalable, maintainable, and safe as it evolves.

What You'll Build

• Define the architecture for a greenfield multi-tenant SaaS platform.
• Design secure tenant isolation using PostgreSQL and Row-Level Security (RLS) or equivalent database-level access controls.
• Establish scalable backend architecture, authentication, authorization, and deployment practices.
• Review and approve all high-impact engineering changes before they reach production, including:
  • Database schemas and migrations
  • Authentication and session management
  • Tenant isolation and authorization
  • Compliance-sensitive messaging workflows
  • Webhook security
  • Secrets management
  • Production deployments
• Review AI-generated application code and automated tests, ensuring production quality and long-term maintainability.
• Define engineering standards for documentation, architecture decisions, and code quality.
• Build operational readiness through:
  • Backup and restore strategies
  • Rollback procedures
  • Monitoring and observability
  • Deployment reliability
  • Documentation that enables future engineers to confidently operate the platform
• Provide written architectural guidance and engineering recommendations throughout the engagement.
• Evaluate the platform's technical readiness at the conclusion of the pilot and provide recommendations for continued development.

Who We're Looking For

Must Have

• Extensive professional experience designing, building, and operating production multi-tenant SaaS applications, with ownership extending beyond feature development into architecture and operations.
• Deep expertise with PostgreSQL, including schema design, migrations, and preferably Row-Level Security (RLS) or comparable database-level tenant isolation strategies.
• Proven experience designing secure authentication, authorization, and permission systems for production applications.
• Hands-on experience deploying and operating cloud-hosted applications, including CI/CD pipelines, production environments, and operational monitoring.
• Strong experience reviewing production code and mentoring engineering teams through architecture and code quality decisions.
• Experience designing secure API integrations, webhook processing, and secrets management.
• Demonstrated ownership of production incidents, including troubleshooting, root cause analysis, and long-term improvements.
• Strong written communication skills, with experience documenting architecture decisions and providing technical guidance asynchronously.
• Comfortable reviewing and improving AI-generated code while maintaining high engineering standards.

Nice to Have

• Experience with payment platforms such as Stripe or similar providers.
• Experience with messaging or communication platforms such as Twilio or similar services.
• Previous experience working with AI-assisted software development workflows.
• Experience establishing engineering standards for early-stage or startup products.
• Background leading technical architecture as a Principal Engineer, Staff Engineer, or Technical Lead.

Tools & Technologies

Backend

• PostgreSQL
• Row-Level Security (RLS)
• Authentication & Authorization
• Multi-tenant architecture
• API integrations
• Webhooks

Cloud & DevOps

• CI/CD
• Production deployments
• Secrets management
• Monitoring & observability
• Backup & recovery
• Rollback strategies

Engineering Practices

• Architecture reviews
• Code reviews
• Test reviews
• Technical documentation
• Architecture Decision Records (ADRs)
• Production readiness assessments

AI-Assisted Development

• AI-generated code review
• AI-assisted testing
• Automated quality assurance
• Human-in-the-loop engineering workflows

Why You'll Enjoy Working Here

• Significant technical ownership over architecture and engineering standards.
• Opportunity to shape an innovative AI-assisted software development workflow.
• Flexible, sustained fractional engagement with long-term potential.
• High-autonomy environment with direct collaboration alongside the founder.
• Focus on solving meaningful engineering challenges rather than managing large teams.

Hiring Process

The engagement begins with a paid pilot lasting approximately 6–10 weeks, allowing both sides to evaluate the collaboration while building the production foundation of the platform.

Successful completion of the pilot may lead to a long-term fractional Technical Lead engagement supporting the product through future development.

Ready to Apply?

If this opportunity aligns with your skills and career goals, we'd love to hear from you. You don't need to meet every preferred qualification to make a meaningful impact—we encourage you to apply if you believe you're a strong fit for the role.