Senior Engineer (Fraîche, CookUnity B2B)

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: Fraîche is CookUnity’s premium smart fridge platform for workplaces, providing fresh, chef-crafted meals, snacks, and drinks right in the office with 24/7 availability. Employees can browse a diverse menu on the Fraîche mobile app and use it to unlock the IoT-enabled fridge and grab their food – no pre-ordering required. As part of CookUnity’s B2B division (CookUnity for Business), Fraîche extends the company’s chef-led dining experience into offices, transforming how people eat at work. We are seeking a Senior Backend / Platform Engineer with strong backend engineering experience and the ability to contribute to our mobile app as needed (approximately 70% backend / 30% mobile ). In this role, you will maintain and evolve our platform capabilities powering the Fraîche experience — including backend services built with PHP and Symfony , data systems (PostgreSQL, Elasticsearch), message queues, Redis, and infrastructure operations. You will also contribute to the Fraîche mobile app (Flutter preferred, React Native acceptable) for hardware-aware and user-facing features. If you are excited about backend development, platform reliability, automation, and building products that bridge the digital and physical worlds, this role is for you! Responsibilities: Develop Improve Platform and Services: Build new backend features and enhance existing functionality in our PHP/Symfony services that power the Fraîche mobile app and operational tooling. Ensure reliable integrations across PostgreSQL , Elasticsearch , message queues , and Redis . Infrastructure Platform Support: Own and improve platform reliability, scalability, and operational excellence. The system currently runs on Upsun infrastructure ; help maintain and optimize it while preparing for a potential migration from Upsun to AWS in the near future. Collaborate on Migration Strategy: Work with the team to plan and gradually implement a potential migration of infrastructure (and related components) to AWS , aligning with CookUnity’s broader B2B tech stack. Be open to adopting new tools and best practices as the platform evolves. Cross-Functional Collaboration: Partner closely with frontend/mobile engineers, backend and full-stack engineers across B2B (including Fraîche) to integrate APIs and ensure smooth end-to-end functionality. Work with product managers and operations teams to refine requirements and improve user workflows. Hardware IoT Integration (Backend Focus): Implement backend solutions that support interaction with our smart fridge hardware — for example, secure fridge unlock workflows, real-time inventory updates, and robust event processing via message queues. Bring creative ideas to make fridge-user interactions more seamless and automated. Mobile Contributions (Approx. 30%): Contribute to the Fraîche mobile app to support hardware-aware flows and critical user journeys, ideally using Flutter (or React Native ). Collaborate with mobile-focused engineers to ensure app changes integrate cleanly with backend services. Quality Best Practices: Write clean, maintainable code with proper architecture, testing, and observability. Participate in code reviews and ensure high performance, reliability, and ... (truncated, view full listing at source)