Senior Full Stack Engineer, B2B (Partnerships & Integrations)

About Cook

Unity

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, Cook Unity was founded as the first‑of‑its‑kind platform that connects the world with the source of truly great food: chefs.

Today, Cook Unity 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, Cook Unity 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 Cook Unity 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 Cook Unity 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, Java Script, Typescript
• Frameworks: React JS, Nest JS
• Infrastructure: AWS, Kubernetes, My SQL
• 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 Java Script 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 Node JS, Nest JS, 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 My SQL or Postgre SQL.
• 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.

Benefits

Paid salary 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 Cook Unity, 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.

Cook Unity 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.

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