Empower every employee.

AI has changed how office workers get things done. For the 80% of the general workforce that doesn't sit at a desk, it has barely arrived. Flip AI is changing that.

Flip AI is the #1 Frontline Agentic Operating System (OS) to build, automate and orchestrate any frontline use case on a foundation of secure identity and comms with strong UX. In practice, that means one app where frontline workers in retail, manufacturing and logistics access their systems, run their processes, and use AI.

More than 1,000 brands trust Flip AI, and over two million people use it worldwide, at companies like Bosch, REWE, FORVIA HELLA and Greif. In August 2026, Notion Capital and HV Capital doubled down with a new $25M round , bringing our total funding to more than $85M .

Our mission: Connect every employee to everything they need in one touch.

Job description

We welcome applicants with a range of experience levels, from those a few years into their career to seasoned engineers. If you are just starting your career but already have experience working alongside your studies, we are also happy to talk to you.

We’re looking for a Product Engineer with a strong backend specialization, a solid technical foundation, and experience working on SaaS products in Agile environments. You’ll help us build reliable, scalable product experiences, with deep ownership of backend systems while staying close to the full user journey.

This role is for someone who is willing to extend their impact across the full stack, from APIs, data models, and infrastructure to the product’s user experience, using AI to bridge the gap where needed. You’ll work closely with product, design, and engineering to turn ideas into high-quality shipped features.

What you can expect

- Cross-functional Collaboration: You will join a product squad and work closely with designers, product managers, and experienced engineers across backend, frontend, mobile, and AI.

- Shift in Software Engineering: Driven by AI, the role is moving toward end-to-end ownership—focusing on understanding user problems, shaping product decisions, rapid prototyping, and validating ideas, rather than just coding from strict specs.

- A Shared Transition: The company is undergoing this transformation itself; you aren't expected to have everything figured out from day one.

- Key Traits Valued: What matters most is your curiosity, adaptability, strong engineering judgment, and a genuine willingness to learn new ways of working.

- Growth and Support: You will receive the tools, practices, and team environment needed to evolve into a product-minded, AI-enabled engineer while continuing to deepen your technical expertise.

What you bring to the table

If you're excited about the role but don't tick every box, we still want to hear from you. Your attitude and willingness to learn matter more to us than matching every bullet.

- Backend Proficiency: Hands-on experience with Kotlin (or Java) and a web framework like Micronaut or Spring, ideally in a SaaS environment.

- Cross-stack Mindset: Backend is your home stack, and you're willing to step into web or mobile when a feature calls for it.

- Comfortable with AI Coding Tools: You use AI coding assistants (Cursor, Claude Code, Copilot, etc.) as part of your workflow, or are eager to adopt them, to navigate unfamiliar codebases, bridge the gap to frontend, mobile, or infrastructure, and ship small, well-structured changes outside your home stack.

- Ownership: You think in terms of user impact, not tickets. You ask "what would actually help the user — or what would bring me closer to understanding that?" and see it through: a prototype, instrumentation on existing features, a conversation with a PM or Customer Success - whatever the question calls for. You carry features through to rollout and observe their impact.

Nice to Haves:

- Experience pairing with designers or working directly from mockups/prototypes.

- Instrumentation and experimentation experience (A/B testing, Grafana, Mixpanel, etc.).

- Deployment with Kubernetes and Helm

- Experience with PostgreSQL.

- Experience with messaging systems (RabbitMQ, Apache Kafka).

What we offer you

- Work mode: We’re remote-first, giving you flexibility to work from home. At the same time, we deeply

📌 (Senior) Product Engineer (España)
🏢 Flip
📍 España