Senior Product Designer (Growth)

InvestEngine

14h•Remote

About The Position

InvestEngine is seeking a Senior Product Designer to join their Growth stream. This is a hands-on, individual contributor contract role focused on delivering high-quality product design work at a fast pace. The primary goal is to produce build-ready designs with minimal rework, especially for high-priority customer journeys. This involves strong upfront clarity, collaboration, and sound judgment. The role requires close day-to-day collaboration with Product and Engineering teams, and partnership with the Design team on standards, craft, and the Design System. The designer will also utilize AI in their workflow to enhance exploration and delivery, ensuring the process remains repeatable and understandable to the team. Participation in research practices, including concept, usability, and comprehension testing, is expected, along with translating findings and data into design decisions within a regulated context that prioritizes clarity, fair treatment, and customer comprehension.

Requirements

5+ years of experience designing digital products as a Product Designer or UX/UI Designer, with a strong portfolio demonstrating end-to-end ownership of complex product experiences.
Strong product design craft, spanning interaction design, systems thinking and end-to-end journey ownership
Comfortable being hands-on with research. You're happy to get stuck into user research as part of the role, with our support, and you make design decisions from evidence rather than opinion
Data-driven design. You use product and behavioural data, along with experiment results, to frame problems, prioritise and prove that designs actually work
High ownership and autonomy, comfortable operating as a senior contractor, clarifying ambiguity and driving work forward
Excellent collaboration, working as a partner to Product and Engineering rather than a service desk
Pragmatic judgement on quality versus speed, knowing where polish matters most
Comfort working within a design system and contributing to it
Comprehension-first, fair-treatment mindset. You design for genuine customer understanding, not just usability.
Experience in a regulated environment such as financial services, insurance, healthcare, gambling or utilities is a strong advantage, but what matters most is that you can clearly evidence this mindset, whether or not it comes from regulated work
English fluency (C1 level and above) — we are a UK-based company, and the role involves regular communication with the team

Nice To Haves

Experience with growth experimentation and funnel optimisation
Strong prototyping skills for quick validation
Prior experience operationalising AI in team workflows, beyond personal use
Fintech or investing-domain experience specifically.
Regulated experience is a strong advantage, and the sector itself is a bonus

Responsibilities

Own design work end-to-end in the Growth stream, from early framing through to build-ready delivery and iteration after release
Produce clear, implementation-ready design output such as flows, states, edge cases, content and acceptance criteria, so engineering has less back-and-forth
Collaborate closely with Product and Engineering to clarify problems early and avoid late-stage rework
Contribute to Design System usage and consistency through your delivery, reusing and improving patterns where needed
Use AI as part of your workflow to accelerate exploration and delivery, in a way that stays repeatable and legible to the team
Take part in our research and evidence practice. We run concept, usability and comprehension testing across the team, and you'll help plan and run studies, then turn findings and product and behavioural data into design decisions
Design in a regulated context, with a strong bias toward clarity, fair treatment and customer comprehension