Senior Copywriter

CRIMASUK Critical Mass UK Limited; Greater London; On-site; GBP 45,000 - 65,000; Full time

Job summary

Critical Mass London is seeking an experienced Senior Copywriter to join our creative team in Bankside, Southwark. You’ll craft compelling digital content for a global travel and hospitality technology platform, shaping brand voice across emails, landing pages, and campaigns.

Collaborate with designers, strategists and leaders; mentor juniors; maintain brand tone; review copy in Figma; manage multiple projects under tight deadlines.

Qualifications

• 5+ years’ experience as a copywriter in agencies or in-house.
• Strong storytelling and editing skills with adaptable voice.
• Excellent understanding of UX/UI and digital customer journeys.
• Proficient in Figma and collaborating in design files.

Responsibilities

• Collaborate with project teams to translate objectives into creative copy.
• Develop engaging content across digital channels including email, landing pages and campaigns.
• Review copy with design to ensure alignment with brand and platform guidelines.
• Guide revisions to keep tone and voice consistent.
• Work with cross-functional teams to balance customer needs and business goals.
• Mentor junior copywriters and share best practices.
• Use Figma to review copy in context within design files.
• Manage multiple projects with tight deadlines.

Skills

Copywriting

Figma proficiency

Storytelling

UX/UI knowledge

Brand guidelines

Tools

Figma

Job description

Agency: Critical Mass Job Function: Creative Job Subfunction: Creative Direction Job Description: Critical Mass London is looking for an experienced Senior Copywriter to join our creative team in Bankside, Southwark. This is an exciting opportunity to work on digital experiences for a leading global travel and hospitality technology platform, helping shape how a globally recognised brand connects with its audiences. As a Senior Copywriter, you’re a natural storyteller who thrives on collaboration and knows how to bring a brand’s voice to life across digital channels. You’ll combine creativity with strategic thinking to tackle complex communication challenges, delivering engaging, imaginative and consistently on-brand content. Working closely with designers, strategists and creative leaders, you’ll help shape exceptional digital experiences, champion creative ideas with stakeholders and inspire those around you.

You will:

• Collaborate with project teams to understand business objectives, audience needs and project requirements, translating these into compelling creative solutions.
• Partner with designers, art directors and creative directors to develop engaging content across digital channels, including email, landing pages and marketing campaigns.
• Review copy alongside design to ensure content aligns with brand guidelines, channel requirements and platform best practices.
• Guide creative revisions to strengthen content and ensure consistency with the brand’s established voice and tone.
• Work with cross-functional teams to build consensus, balancing the needs of customers and business objectives while advocating for the strongest creative solutions.
• Collaborate with design partners and creative leadership to review, develop and refine templates and guidelines, helping teams deliver high-quality, on-brand email campaigns.
• Use Figma confidently to collaborate with design teams, review and edit copy within design files, and contribute to the development of digital experiences.
• Manage multiple projects simultaneously, maintaining exceptional creative standards while working to tight deadlines.
• Champion creative excellence and share your knowledge to support and mentor junior copywriters.

You have:

• 5+ years’ experience as a copywriter within an agency or client-side environment, ideally working across digital, email, landing pages and marketing or advertising campaigns.
• Strong, hands‑on experience with Figma is essential, including working collaboratively within design files and reviewing copy in context.
• Exceptional writing and storytelling skills, with the ability to adapt your tone and style for different audiences, channels and brand contexts.
• A strong understanding of UX/UI principles, digital experiences and the role copy plays in shaping user journeys and interactions.
• A passion for design and a collaborative approach to working with designers, strategists and other creative talent.
• The ability to interpret and consistently apply brand guidelines while bringing fresh thinking and creative flair to every project.
• An understanding of how copy and visual design work together to create effective, engaging experiences.
• Excellent attention to detail, strong organisational skills and the ability to manage competing priorities in a fast‑paced environment.
• Confidence presenting and championing creative ideas, responding to feedback and working with stakeholders across multiple teams.

If you’re a creative thinker with a passion for digital storytelling, a sharp eye for detail and the Figma skills to bring words and design together, we’d love to hear from you.

To the extent permissible by local law, Omnicom’s policy requires employees to work in the office for a minimum of three days a week, unless additional in‑office days are directed by their agency or manager.

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