Group Tax Assistant Manager (4 days a week) in London

Why work for us? A career at Janus Henderson is more than a job, it’s about investing in a brighter future together.

Our Mission

Our Mission at Janus Henderson is to help clients define and achieve superior financial outcomes through differentiated insights, disciplined investments, and world‑class service. We will do this by protecting and growing our core business, amplifying our strengths and diversifying where we have the right.

Our Values

• Clients Come First - Always
• Execution Supersedes Intention
• Together We Win
• Diversity Improves Results
• Truth Builds Trust

If our mission, values, and purpose align with your own, we would love to hear from you!

Your opportunity

The Senior UX Designer plays a strategic and hands‑on role in shaping intuitive, accessible, and effective digital experiences across Janus Henderson’s global ecosystem. They serve as a design leader who partners across teams, drives UX strategy, contributes to the design system, and elevates design quality through thoughtful execution, research‑informed decisions, and cross‑functional influence.

Responsibilities

• Lead UX strategy and define design approaches for complex digital initiatives.
• Design user flows, wireframes, prototypes, and high‑fidelity solutions that elevate digital experiences.
• Champion accessibility and inclusive design, ensuring adherence to WCAG standards and best practices.
• Drive contributions to the JHI Design System including patterns, components, and usage guidance.
• Collaborate closely with marketing, product, engineering, content, and brand partners.
• Translate business goals, analytics insights, and user needs into clear UX recommendations.
• Guide stakeholders toward user‑centered decisions through storytelling and structured rationale.
• Participate in and support all phases of the UX lifecycle.
• Maintain strong quality standards—mobile‑first design, consistency, detail, and craft.
• Stay current with UX methodologies, tools, trends, and emerging best practices.

Leadership & Collaboration

• Lead cross‑functional workshops, discovery efforts, and design reviews.
• Mentor junior and mid‑level designers, sharing knowledge and elevating team capability.
• Influence the broader organization through UX advocacy and thought leadership.
• Manage expectations, timelines, and communication with stakeholders across regions and teams.

Success Measures

• Delivery of experiences that improve engagement, usability, and business outcomes.
• Increased adoption, quality, and consistency within the JHI Design System.
• Positive stakeholder alignment and cross‑functional collaboration outcomes.
• Demonstrated leadership through ownership, initiative, and strategic impact.
• Carry out other duties as assigned.

Benefits

• Hybrid working and reasonable accommodations.
• Generous Holiday policies.
• Excellent Health and Wellbeing benefits including corporate membership to ClassPass.
• Paid volunteer time to step away from your desk and into the community.
• Support to grow through professional development courses, tuition/qualification reimbursement and more.
• Maternal/paternal leave benefits and family services.
• Complimentary subscription to Headspace – the mindfulness app.
• All employee events including networking opportunities and social activities.
• Lunch allowance for use within our subsidised onsite canteen.

Must have skills

• Prior UX design experience creating digital experiences.
• Expertise in Figma and modern prototyping and research tools.
• Deep knowledge of UX strategy, interaction design, responsive design, and accessibility.
• Strong communicator able to simplify complexity and influence at all levels.
• Experience working with or contributing to a design system.
• Familiarity with HTML/CSS is a plus.

Potential for growth

• Mentoring
• Leadership development programs
• Regular training
• Career development services
• Continuing education courses

Other Information

You will be expected to understand the regulatory obligations of the firm and abide by the regulated entity requirements and JHI policies applicable for your role. At Janus Henderson Investors we’re committed to an inclusive and supportive environment. We believe diversity improves results and we welcome applications from candidates from all backgrounds. Don’t worry if you don’t think you tick every box, we still want to hear from you! We understand everyone has different commitments and while we can’t accommodate every flexible working request, we’re happy to be asked about work flexibility and our hybrid working environment. If you need any reasonable accommodations during our recruitment process, please get in touch and let us know.

Annual Bonus Opportunity: Position may be eligible to receive an annual discretionary bonus award from the profit pool. The profit pool is funded based on Company profits. Individual bonuses are determined based on Company, department, team and individual performance.

Benefits: Janus Henderson is committed to offering a comprehensive total rewards package to eligible employees that includes competitive compensation, pension/retirement plans, and various health, wellbeing and lifestyle benefits.

Janus Henderson (including its subsidiaries) will not maintain existing or sponsor new industry registrations or licenses where not supported by an employee’s job functions (as determined by Janus Henderson at its sole discretion). You should be willing to adhere to the provisions of our Investment Advisory Code of Ethics related to personal securities activities and other disclosure and certification requirements, including past political contributions and political activities. Applicants’ past political contributions or activity may impact applicants’ eligibility for this position.