Senior Full Stack Developer ( PHP -Laravel )

Senior Full Stack Developer — B2B Pipeline

About the Role

We are looking for a Senior Full Stack Developer to take technical ownership of key capabilities within our B2B SaaS platform and partner pipeline.

This is a hands-on engineering role for an experienced developer who has previously built or supported B2B SaaS capabilities such as enterprise authentication/SSO, third-party API integrations, payment workflows, multi-tenant applications, partner administration, and customer-facing analytics.

The developer will work primarily within a Laravel/PHP-based platform supporting multiple partner types, from smaller co-branded organizations to larger enterprise customers requiring deeper integrations and configurable workflows.

The ideal candidate can independently take a business requirement from discovery through technical design, development, testing, and production deployment. We are specifically looking for someone whose prior experience aligns with the capabilities on our B2B roadmap—not simply a generalist full stack developer.

Key Responsibilities

• Own and deliver B2B features and modules from requirements and technical design through development, testing, deployment, and ongoing support.
• Design and develop scalable, secure backend services and application functionality using Laravel and PHP.
• Design and maintain multi-tenant SaaS architecture supporting multiple business partners while maintaining appropriate separation of partner configuration and data.
• Build and enhance enterprise authentication and Single Sign-On (SSO) integrations for external partner organizations.
• Design and implement API integration frameworks that allow partner applications and portals to securely interact with the platform.
• Develop and maintain RESTful APIs, webhooks, application routing, and other integration mechanisms for real-time and asynchronous communication with external systems.
• Implement and maintain payment integrations and B2B payment workflows, including payment processors, invoicing, configurable partner payment options, and business-sponsored payment models.
• Build administrative functionality that allows partner-specific settings and configurations to be managed without requiring custom development for each customer.
• Develop B2B dashboards and reporting capabilities, including metrics related to utilization, conversions, transaction/visit volume, and revenue.
• Implement appropriate authorization and data-access controls to ensure users and partner organizations can access only the information appropriate to their roles.
• Support configurable partner experiences, including partner-specific branding, content, legal documentation, workflows, and integrations.
• Establish and maintain regression coverage for existing B2B functionality to protect platform stability as new partner capabilities are introduced.
• Troubleshoot complex application and integration issues across the full technology stack.
• Participate in technical design decisions and identify opportunities to create reusable platform capabilities rather than one-off partner customizations.
• Communicate directly with product, business, and client-facing stakeholders to translate partner requirements into practical technical solutions.
• Provide technical estimates, identify dependencies and risks, and communicate implementation tradeoffs before development begins.
• Write clean, maintainable, secure, and well-documented code and participate in peer code reviews.

Required Skills & Experience

• 4+ years of professional full stack development experience, including ownership of production application features or modules.
• Strong hands-on experience with Laravel and PHP in production environments.
• Demonstrated experience building or maintaining B2B SaaS or multi-tenant applications serving multiple organizations or customers.
• Prior experience implementing or integrating Single Sign-On (SSO), federated authentication, or enterprise identity solutions for external customers or partner organizations.
• Strong experience designing, building, and consuming APIs and third-party integrations.
• Experience implementing webhooks and event-driven integrations with external platforms.
• Experience integrating payment processors or payment gateways into production applications and supporting non-trivial payment or billing workflows.
• Experience designing role-based authorization and data-access controls, particularly where informat…