Senior Full Stack Engineer, B2B (Partnerships & Integrations)

About CookUnity:

Food has lost its soul to modern convenience. And with it, it has lost the power to nourish, inspire, and connect us. So in 2018, CookUnity was founded as the first-of-its-kind platform that connects the world with the source of truly great food: chefs. Today, CookUnity delivers 50 million meals a year from the industry’s best chefs to homes all over the country. Fresh. Ready-to-eat. And crafted with the passion that nourishes body and soul.

Unwilling to stop there, CookUnity is expanding beyond delivery to become an ever-innovating marketplace focused on our singular mission: empower Chefs to nourish the world.

If that mission has you hungry in more ways than one, you’ve found the right job posting.

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 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 apps—end-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.
• Fluency with AI engineering tools.

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 we’re looking for, we invite you to explore: CookUnity's 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, we’d 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.

If you’re interested in this role, please submit your application, and if we think you might be a fit, we'll get in touch with you. Thank you for your time!

CookUnity is an Equal Opportunity Employer. We are dedicated to creating a community of inclusion and an environment free from discrimination or harassment. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, age, sexual orientation, gender identity, national origin, citizenship status, protected veteran status, genetic information, or physical or mental disability.

A quick note for all candidatesWe’ve recently seen an increase in recruitment scams across the industry, and we want to make sure you (and your data) stay safe while applying to CookUnity. We also want you to know that we take this seriously — sometimes, as part of our process, we may ask for a brief “proof of humanity” to confirm that we’re connecting with a real person, not an impersonator. Here are a few tips to help you protect yourself and know what to expect from us:

• Apply only through our official channels. All open roles are listed on our official careers page: careers.cookunity.com
• Our recruiters are real people — and easy to verify. You can always find them on LinkedIn with verified profiles. If you’re unsure, feel free to reach out to us on our official LinkedIn Company Page.
• We only communicate through official CookUnity channels. That means emails ending in @cookunity.com and interviews held through official company platforms (Google Meet or Zoom) — never WhatsApp, Telegram, or SMS.
• We’ll never ask for payment or personal financial details. If anyone does, please don’t share any information and let us know right away.

If something ever feels off or you’re unsure about a message, we’d much rather you double-check with us. You can always contact us directly through any of our social media channels. We appreciate your interest in joining CookUnity — and we care about keeping your experience (and safety) as genuine as possible.