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 experienceoften 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 directionprioritizing 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 technically by being a hands-on coder removing roadblocks and repairing technical issues across integration flows.
• Partner closely with Product Growth Marketing Customer Experience and external stakeholders; communicate effectively with third-party integration teams (often in English) to unblock execution and ensure alignment.
• Improve uptime & support the on-call rotation that helps the business run 24/7.

Minimum Requirements:

• You have experience designing and building cloud architecture backends middle ends web appsend-to-end delivery ownership.
• Experience with NodeJS NestJS AWS and React.
• Experience with integrations: consuming and designing REST APIs handling authentication (e.g. OAuth/API keys) working with webhooks/events and building resilient workflows.
• Experience with relational databases such as MySQL or PostgreSQL.
• Experience with automated testing and continuous integration and deployment.
• You understand how to design implement and maintain backend services that will be used by internal teams and external partners.
• You have an advanced level of English (written and spoken) comfortable collaborating with international stakeholders and partner engineering teams.

Preferred Requirements:

• Previous experience leading or mentoring teams is highly valued.
• You enjoy working in small teams in a fast-paced startup environment.
• You are excited by the opportunity to grow into a leadership role as the company expands.
• Experience with agile development methodologies and tools such as Jira.
• Strong communication and collaboration skills.

Learn More About CookUnity

We believe great leadership starts with alignment on vision values and ways of working. To give you deeper insight into who we are and what were looking for we invite you to explore:CookUnitys Leadership Principles The values and behaviors that guide how we operate collaborate and scale.

We hope this provides valuable insight into our culture and product vision. If this excites you wed love to connect!

Benefits

Get paid in USD!

Work remotely: design the life that you want.

Enjoy 15 business days of vacation each year from the start date.

16 fully paid Argentinean holidays.

Healthcare Benefit: Monthly stipend to use in your preferred healthcare provider.

5-year Sabbatical: After 5 years with CookUnity you get a 4-week paid sabbatical.

Paid family leave.

Compassionate Leave: 3-5 days each time the need arises.

Customize the benefits that suit your needs! Access a range of perks tailored to you including learning opportunities wellness memberships delivery apps and more through our comprehensive benefit platform.

Personalized English coach.