Senior Product Designer - B2B SaaS

JobFluent; Barcelona; Hybrid; EUR 40,000 - 60,000; Full time

Benefits offered by this job

Competitive salary €40–60k

Hybrid work: 2 days in office

Modern office in Poblenou, Barcelona

AI tooling to experiment with

Playflow salary benefits

Job summary

haddock is rebuilding its design function and is seeking a Senior Product Designer to lead the effort from the front. You will own the end-to-end product design across the whole platform, including the AI workflows like Fina, and partner with engineers to ensure a high-quality user experience.

This hybrid role in Barcelona offers the chance to shape design at an ambitious startup, work with AI tooling, and drive measurable value for restaurateurs using our B2B SaaS solution.

Qualifications

• 5+ years of product design experience in scaling B2B SaaS companies.
• Own end-to-end design from discovery to shipped feature.
• Strong command of design systems and brand consistency.
• Active use of AI in the design process with measurable productivity gains.
• Fluent in Spanish and comfortable in English.

Responsibilities

• Own the end-to-end design process, from discovery to shipped feature.
• Design flows and interfaces for system of record and AI Agents.
• Talk to customers to validate ideas and run usability tests.
• Turn ambiguous problems into clear, usable solutions.
• Work closely with engineers during implementation to protect quality.
• Build and maintain haddock's design system and brand standards.

Skills

Product design

End-to-end design

Design systems

AI in design

Customer interviews

Job description

haddock is looking for a Senior Product Designer - B2B SaaS to lead the rebuild of their design function.

Highlights

Barcelona (Hybrid: at least 2 days in office, Poblenou)

AI tooling to experiment with, Urban Sports Club membership, Playflow salary benefits and many more.

What is haddock?

haddock is the market leader solution for point of control in restaurants, handling all back-office vital operations like product management, inventories, purchases, price tracking, document conciliation, bank conciliation, paychecks, clocking in/out, P&L reports, etc.

Not only we have a system of record that helps operate restaurants with control and clarity, but we're also the leaders in offering AI Agents, starting with Fina. They work 24/7 doing the heavy, tedious work that our customers don't have time to do well.

This is no AI hype. Our customers obtain visible value from our AI Agents, both in money and time saved. We're becoming strategic partners in the design of their businesses.

Our mission is to empower millions of restaurateurs to level up their business.

Our vision is to lead the market through innovation, strong relationships and by becoming the go-to tech partner for restaurant success.

haddock is backed by Y Combinator, the accelerator behind Airbnb and Twitch. We're growing fast with support from top-tier investors like JME, Decelera, Extension Fund, Wayra, and Zone2Boost.

Bonus: we're a step away from the people using what we build. Many of our restaurants are based right here in Barcelona, and they love haddock.

Ready to lead design at haddock?

We're rebuilding the design function at haddock, and looking for the senior designer to lead that from the front. This is a real opportunity to shape how design works here, the standards it holds, and the systems it runs on, with a lot of room to make it yours.

If you're excited by that kind of ownership — and by embracing iteration, excellence, and AI like you've likely never done before — keep reading.

What we're looking for

We are looking for an action-oriented, curious, autonomous, and take full ownership of their work designer. You are champion of figuring out the unknowns. You talk to customers, deliver quality work, improve our tooling, and are ambitious.

We strongly adhere to Lean Startup and Agile principles, favoring action over analysis, imperfect iteration over perfect delivery, face-to-face communication, and a fast-paced environment.

We work in small mission-oriented squads of 1 to 3 people.

As the senior designer leading this next chapter, you'll set the bar for how design gets done at haddock. You'll own the end-to-end process across the whole product, not just a corner of it:

• Own the end-to-end design process, from discovery to shipped feature
• Design flows and interfaces for both our system of record and our AI Agents, like Fina
• Talk to customers to validate ideas, run usability tests and gather feedback
• Turn ambiguous problems into clear, usable, and elegant solutions
• Work closely with engineers during implementation to protect the quality of the final result
• Track usage, measure interactions and extract conclusions to inform new iterations
• Build haddock's design system and set the standard for brand consistency, from scratch

Our processes and tools are constantly improving, and everyone contributes to making them better.

Some example high-level objectives you could work toward in your first months:

• Redesigning key flows so business data tells the story of the restaurant to their owners, surfacing financial metrics and insights clearly.
• Designing the experience for Fina, our AI Agent, so conversational and automated workflows feel trustworthy and effortless for non-technical restaurateurs.
• Increasing adoption of inventories to 50% of customers, by simplifying a crucial part of daily restaurant operations.

If you're excited by ownership, autonomy, and designing technology that directly impacts real businesses every day, this is the right moment to join.

Come on board while we're still a startup. It's much more fun and motivating than joining an already established scale-up or corporation, where your role is very defined and limited.

This is more than a job. It's a chance to leave your mark on an industry that's ripe for transformation, and to shape what design becomes at haddock as we invest in it seriously. Our best perk is our work environment and the opportunities you'll get to learn and grow at haddock.

5+ years of product design experience in scaling B2B SaaS companies.

End-to-end product design experience: from discovery and research to interaction design, prototyping, and validation. We aren't looking for a "screen decorator" — we need someone responsible for outcomes, not just for delivering mockups.

Strong command of design systems, including experience building or scaling one as a product grows.

Active, hands-on use of AI in your design process — not just familiarity, but developed judgment (criterio) for when and how to use it, and real productivity gains to show for it.

Fluent in Spanish and comfortable in English. We tend to speak Spanish at the office and in Slack, and write documentation and projects in English.

You'll stand out if you've already designed for AI-driven products in production — at haddock we already have 15+ AI workflows live, and that number keeps growing.

Nice to have

• Experience growing or leading a design function at an early-stage startup
• Familiarity with front-end concepts (components, states) — enough to have real conversations with engineers about feasibility
• Experience running customer interviews or usability tests end-to-end, not just observing them

Who are we?

haddock is the AI-powered back-office for restaurants. We started as a system of record (inventories, purchases, invoices, bank reconciliation, P&L reports) and turned it into the harness where our AI workforce lives. They run 24/7, doing the heavy operational work so restaurateurs can focus on what they do best.

Our customers don't just save time. They make better decisions, catch problems before they escalates, and run tighter businesses. That's the kind of value we're here to deliver.

Our mission is to empower millions of restaurateurs to level up their business.

Our vision is to lead the market through innovation, strong relationships, and by becoming the go-to tech partner for restaurant success.

haddock is backed by Y Combinator, the accelerator behind Airbnb and Twitch. We're growing fast with support from JME, Decelera, Extension Fund, Wayra, and Zone2Boost.

Bonus: we're a step away from the people using what we build. Many of our restaurants are based right here in Barcelona, and they love haddock.

What we offer

• First and foremost, the project itself: a growing startup with ambition, product-market fit, and great culture.
• A competitive salary (€40–60k gross/year) that will grow as haddock — and you — grow.
• A bright, modern office in Barcelona, in Poblenou. Probably the best office you've ever worked at (PS: The attached photo was taken on the office rooftop during a product retro breakfast with the team).
• Hybrid work, with 2 days at the office to build trust, collaborate, align, and get creative.
• All the AI tooling you want to experiment with.
• Salary flexibility benefits through Playflow.

We move fast and communicate openly. Our goal is to wrap up the process within a week. Here's what to expect:

• Intro call with the Head of Product - 25 min
• Portfolio review and design deep-dive - 45/60 min
• Design challenge or take home exercise
• Final call with Founders- 25 min

We usually respond to applications within three days. Sounds like an opportunity?