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Junior Copywriter
Company Description
We're a digital marketing agency that thrives on bold ideas and powerful visuals. At Catalyst Growth, we specialise in UGC ads, static and motion design creatives. We work with fast-growing DTC brands across the world to drive engagement and scale their digital presence.
About the Role
Some ads get ignored.
Some ads stop the scroll, start conversations, and scale brands.
Those are the ads that matter and the ads we make.
Catalyst is looking for a curious, ambitious Junior Copywriter to join our creative team and learn how high-performing paid social creative gets made.
You'll work alongside Creative Strategists, Designers, and Producers to turn client briefs into ideas that are built to perform across Meta, TikTok, YouTube, and wherever audiences are spending their time next.
This is a role for someone who:
- Loves writing,
- Pays attention to the ads they save or click on,
- Wants to understand why some creative scales while other creative disappears into the feed.
You'll learn how to:
- Write the hooks that earn attention,
- Create scripts that drive action,
- Produce copy that helps brands grow.
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No noise. No "maybe this fits." Just roles with a clear explanation of why they're right — and where to focus when applying.
Most importantly, you'll learn how performance data turns good creative into great creative.
What You'll Be Doing
Turning Briefs into Creative that Performs
- Work alongside Creative Strategists and Designers to respond to client briefs from concept through to delivery.
- Help develop ideas that balance creativity with commercial objectives.
- Contribute fresh angles, new hooks, and copy-led ideas during brainstorms and creative sessions.
- Partner with Designers to ensure words and visuals work well together, particularly in static formats where every word earns its place.
Learning the Craft of Performance Copywriting
- Write across a range of formats, including hooks, UGC scripts, headlines, CTAs, statics, and supporting creative assets.
- Learn what makes people stop scrolling, engage, and convert.
- Build an understanding of each client’s tone of voice and apply it consistently across every output.
- Adapt copy for different platforms, audiences, and placements across paid social.
Testing, Learning, and Improving
- Use creative performance data and testing feedback to improve your work over time.
- Learn how winning ads are built through iteration rather than guesswork.
- Treat every result as a learning opportunity and every test as a chance to uncover the next winning angle.
- Develop an instinct for spotting patterns, trends, and opportunities before they become obvious.
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What We're Looking For
- Copywriting experience through previous roles, internships, freelance work, or a portfolio you’re proud of.
- We want to see:
- Punchy headlines,
- Sharp creative thinking,
- Scripts that stop people mid-scroll.
- We want to see:
- A genuine interest in advertising, paid social, and performance creative.
- Collaborative, team-first mindset and confidence to share ideas early and often.
- Strong attention to detail and the ability to self-edit while delivering polished work under tight deadlines.
- Someone who enjoys moving quickly, learning continuously, and improving with every round of feedback.
Work Setup
We're based in London and operate a hybrid working model:
- 2 days in our Elephant & Castle office.
“It took my CV and asked me questions relevant to understanding what kind of jobs to suggest for me. Suggestions were almost perfect. Jobs were exactly what I’ve been looking for.”
Jessica, London
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