Interaction Designer

Solirius Ltd.

Greater London

On-site

GBP 45,000 - 65,000

Full time

14 days+

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Benefits offered by this job

Competitive Salary

Bonus Scheme

Private Healthcare Insurance

25 Days Annual Leave Bank Holidays

Development Training

Enhanced Parental Leave

Fertility Leave

Pension

EAP

Gym Membership

Flexible Working

Away Days

Job summary

Solirius Reply, part of the Reply Group, is seeking an Interaction Designer in London with hybrid working. You will design and deliver user-centred digital services for Government and Private Sector clients, translating user research into accessible, effective interactions across channels.

You’ll collaborate with developers, researchers, and product managers in an agile environment, producing sketches, flows, wireframes, and prototypes, while helping evolve our design standards and supporting

Qualifications

Proven experience using GOV.UK Prototype Kit and design patterns.
Demonstrates usability, accessibility, and inclusivity per WCAG and GOV.UK guidelines.
Experience with Government Service Standard and service assessment phases.
Creates simple, intuitive, accessible digital services aligned with business goals.
End-to-end thinking across channels and user journeys.

Responsibilities

Designs and delivers user-centred digital public services for Government and Private Sector clients.
Produces sketches, user flows, wireframes, journey maps, and prototypes.
Facilitates workshops, co-design sessions, and user testing to validate solutions.
Collaborates with cross-functional teams in an agile environment to improve services.

Skills

GOV.UK Prototype Kit

Design Systems

Usability & Accessibility

Government Service Standard

End-to-End Service Design

User Research

Prototyping Methods

Interaction Artefacts

Stakeholder Facilitation

Agile Teamwork

Design Standards

Job description

Role: Interaction Designer

Location: London/Hybrid

Clearances: Internal Background Check (DBS) / Eligible for Security Clearance

About Us:

Solirius Reply, part of the Reply Group, is a technology consultancy and digital transformation partner that helps organisations solve complex challenges through strategy, design, engineering, and delivery.

We work closely with our clients to deliver secure, accessible, user-focused services that evolve with their needs. By combining deep technical expertise with people-centred design, we create solutions that deliver meaningful, lasting impact.

Our consultants partner directly with client teams, embedding into organisations to understand their goals, challenges, and users. This collaborative approach enables us to deliver tailored solutions that drive measurable outcomes across public and private sectors.

Past and present clients include the Ministry of Justice, Department for Education, Ministry of Housing, Communities and Local Government, UEFA, International Olympic Committee, and Mercedes-Benz. Our services span the full digital delivery lifecycle, including architecture, engineering, delivery management, user-centred design, business analysis, data, DevOps, and AI.

We operate as a collaborative and inclusive organisation that empowers our people to take ownership, innovate, and develop their expertise. As an equal opportunities employer, we are committed to encouraging equality, diversity, and social mobility, while creating opportunities for our teams to work on meaningful projects that deliver lasting impact.

About You:

You are a motivated and adaptable professional with a strong analytical mindset and a passion for using technology to solve real-world problems. You enjoy working in collaborative, agile teams and take pride in delivering high-quality solutions that make a tangible impact. With strong communication skills and a consultative approach, you’re comfortable engaging with clients, understanding their needs, and translating them into effective outcomes.

The role

We’re looking for an Interaction Designer to join our multidisciplinary team designing and delivering innovative, user-centred digital public services for Government and Private Sector clients.

You’ll be a great listener and communicator with a creative, structured, and logical approach to understanding problems and designing inclusive, human-centred experiences.

We’re specifically looking for a pragmatic team player with an appreciation of both business and user needs, who is keen to develop their ‘T-shaped’ skills and is not afraid to take on new challenges.

Skills and experience required

Proven experience and knowledge of using GOV.UK Prototype Kit, design systems and design patterns
Proven experience of understanding and ensuring usability, accessibility, and inclusivity, in line with WCAG and GOV.UK design guidelines.
Demonstrates practical experience of working to the Government Service Standard, ideally with service assessment experience across all phases
Designs simple, intuitive, and accessible digital services that meet user needs and business objectives.
Takes an end-to‑end view of services, creating effective, user-centred interactions across channels.
Participates in user research activities, using qualitative and quantitative evidence to inform design decisions and service improvements.
Rapidly prototypes and tests designs using a range of methods, including paper, digital, and code-based prototypes
Produces clear interaction design artefacts, including sketches, user flows, scenarios, wireframes, journey maps, and prototypes.
Captures and communicates design decisions clearly and confidently, influencing stakeholders and colleagues with a strong evidence base.
Facilitates workshops, co-design sessions, and user testing to explore problems, generate ideas, and validate solutions.
Works collaboratively within agile, multidisciplinary teams alongside developers, researchers, product managers, and stakeholders to deliver effective services.
Contributes to design standards and design systems, maintaining consistency across services and interfaces.
Supports service transformation by improving the efficiency, speed, and usability of public services.

Communication and productivity

Excellent verbal, written, and facilitation skills, able to engage confidently with stakeholders at all levels.
Strong technical literacy, able to understand high-level technical processes, constraints, and concepts.
Recognises and works within project constraints, supporting teams to deliver value to clients and users.
Supports and coaches teams and stakeholders in user-centred design and agile ways of working.
Contributes to internal culture, tools, processes, and capability development.

Company development

Contributes to the development of the Design practice and the Interaction Design community of practice
Mentors, coaches, supports and manages colleagues
Supports thought leadership, case studies, and insights showcasing interaction design expertise
Contributes to client proposals and presentations to help win new projects.

The ideal candidate will share our values and ways of working. As your career progresses, you can expect to work across all stages of the development lifecycle, from strategy to implementation, and take assignments across different sectors. This provides a broad base of experience for building an outstanding career.

Candidates should be open to working in different locations for different clients. While most work is remote, candidates should be happy to meet in our London office and travel as client needs dictate.

Equality & Diversity:

Solirius Reply is an equal opportunities employer. We are committed to creating a work environment that supports, celebrates, encourages, and respects all individuals and in which all processes are based on merit, competence and business needs. We do not discriminate on the basis of race, religion, gender, sexuality, age, disability, ethnicity, marital status or any other protected characteristics.

Should you require further assistance or require any reasonable adjustments be put in place to better support your application process, please do not hesitate to raise this with us.

Benefits