Senior Full Stack Engineer, B2B (Partnerships & Integrations)

About the Team:

Our B2B department, established at the beginning of 2024, is on the brink of significant growth. Our mission is clear: to reach roughly $458k in MRR by the end of the first semester of 2026 and provide a stellar customer experience with limited pain on our operations.

We are creating a dedicated Partnerships & Integrations squad within B2B. This team will focus on building and scaling third-party integrations and commercial partnerships that expand CookUnity distribution and unlock new revenue channels (e.g., our Airbnb integration, and future opportunities with platforms like Instacart, Amex, and others).

The Role:

• Help integrate CookUnity with third-party platforms (marketplaces, loyalty programs, travel partners, payments/benefits providers, etc.) by designing and implementing robust, scalable, and reusable integration patterns.
• Help shape the future of B2B expansion and product distribution by working directly with the Head of B2B and cross-functional stakeholders.
• Learn the ins and outs of a complex, operationally heavy business and simplify/automate partner workflows through technology.
• Oversee projects across a full-stack environment, with challenges on the front-end, backend, and mobile experience—often involving external partner systems, APIs, and technical constraints.
• Be hands-on and build a world-class partner-enabled customer experience, delivering solutions that can be used at scale quickly and safely.
• Maintain/scale our AWS infrastructure supporting integrations, reliability, observability, and secure data exchange with partners.

Our Current Stack:

• Languages: Java, JavaScript, Typescript,
• Frameworks: ReactJS, NestJS
• Infrastructure: AWS, Kubernetes, MySQL
• Agile Methodology
• Service Oriented Architecture

Responsibilities:

• Ensure that partner integrations and platform components are scalable, reliable, secure, and efficient.
• Identify and address technical debt and performance bottlenecks, especially in integration flows and high-volume partner traffic scenarios.
• Manage and maintain databases, ensuring they are optimized for performance and reliability across integration-related workloads.
• Own the design and implementation of features within our JavaScript stack that power partner experiences and drive meaningful business impact.
• Build and evolve integration foundations: API design, authentication/authorization, webhooks/events, idempotency, retries, monitoring/alerting, and partner-facing documentation where needed.
• Iterate on new and existing features to improve user experience, operational efficiency, and partner success metrics.
• Actively contribute to strong software architecture, best practices, and long-term technical direction—prioritizing reusable components and patterns that accelerate future partnerships.
• Improve the maturity of our technical stack with engineering best practices (testing, CI/CD, code quality, reliability).
• Participate in the code review process and help mentor other engineers.
• Contribute tech