Founding Product Designer

We have partnered with an incredibly exciting, fast-growing UK tax technology start-up that is rewriting the rules of the accountancy profession.

Having already secured seed funding and currently progressing through a £1.5m round, they are building expert systems that transform incredibly complex tax legislation into clean, machine-readable code.

Their platform is already live, integrated with [REDACTED], and actively used by accounting practices supporting hundreds of SMEs.

Up until now, the focus has been on flawless technical accuracy and functionality. Now, they need a Founding Product Designer to take complete ownership of the user experience and lead a ground-up redesign.

There are no layers of bureaucracy, no endless sign-off processes, and no team to manage just yet. You will work directly with the founders (CEO/CTO) and sit face-to-face with users to turn a high-powered technical engine into a modern, intuitive, and genuinely beautiful B2B SaaS platform.

The Role & Responsibilities

As the solo design leader, you will be entirely hands-on, bridging the gap between complex backend data workflows and a seamless user experience.

• End-to-End Product Design: Own the UX/UI of the entire platform, including dashboard design, complex report builders, audit trail visualisations, and data ingestion flows.
• Build the Blueprint: Establish and maintain a scalable design system from scratch that the engineering team can build with efficiently.
• Deep User Research: Conduct direct research sessions with existing accounting firm clients. You will watch how they work, gather feedback, and translate those insights into definitive design choices.
• Shape the Brand: Define the visual identity of the product, moving it away from "boring compliance software" into a modern, distinct, and premium SaaS category.
• Domain Immersion : Work alongside in-house domain experts to understand UK tax logic, ensuring you can design with a true understanding of user intent.

What We Are Looking For

This role requires a unique blend of high-level systems thinking and flawless pixel-level execution.

• B2B SaaS Expertise: You have a proven track record designing complex tools where users interact with dense data points (e.g., fintech, compliance platforms, ERPs, dashboards, or advanced reporting tools).
• Systems Thinker: You look beyond individual screens. You care deeply about how data flows, how steps connect, and how to build user confidence through UI. 100%
• Hands-On: You thrive as a solo operator. You are excited to design day-to-day rather than managing or directing others.
• User-Obsessed: You love getting in front of clients, asking "why" repeatedly, and building based on real human behaviour rather than assumptions.

Nice to Haves:

• Experience working within a fast-paced seed-stage startup (navigating pivots and rapid iteration cycles).
• Prior experience building design systems from scratch.
• A background or exposure to tax, accounting, or compliance tech.

What Success Looks Like in 12 Months

• You will have launched a distinct visual identity that sets the company entirely apart from traditional, legacy tax software.
• Key user workflows will be completely redesigned based on your fresh user research.
• A scalable design system will be fully embedded into the engineering workflow.
• User research will be a core pillar of how the company builds product moving forward.

To Apply

If you are an ambitious designer who loves complex workflows and wants the financial upside of a generous equity and bonus structure, we want to hear from you.

Please apply and include a link to your portfolio highlighting your experience with complex B2B SaaS data products.

[REDACTED] is acting as an employment agency for this vacancy. My client is an equal opportunity employer committed to fostering a diverse and inclusive workplace. Due to high volumes of interest, we can only respond to shortlisted applicants .