Careers

Who We Are

Sertonin was founded in 2019, and is now one of the leading independent agencies in the UK.  
With a base in the centre of Manchester, our team of creative, media, CRM and content specialists work together for brands across a whole range of sectors, including property, hospitality, ecomm, wellness, tech & engineering.

Over the years, we have created, launched and transformed brands and businesses - always through tenacity, transparency and teamwork (those are our values, and the way we strive to show up every day).

We’ve challenged ourselves, each other (and our clients too), to push for better ways to do things, to be more collaborative, more impactful, and always deliver work we can be proud of.

It’s what sets us apart. And it’s why we attract clients and colleagues who are innovators, forward-thinkers, people who care about giving their very best every day.

Maybe that sounds like you?

We might just have a role that fits… 👇

The Role

As an Email Marketer & Klaviyo Specialist at Serotonin, you’ll play a pivotal role in helping DTC brands unlock their full potential.

Email and SMS are the lifeblood of customer retention and your work will directly fuel growth, loyalty, and revenue for some of the most exciting eCommerce brands.

You’ll combine creativity, data, and strategic insight to make Klaviyo accounts not only perform, but thrive.

Key Responsibilities

1. Email Marketing Strategy Development:
- Plan and execute tailored email marketing strategies for clients across diverse industries, including real estate, hospitality, legal, and construction.
- Align strategies with client goals such as lead generation, brand awareness, event promotion, and customer engagement..

2. Content & Copywriting:
‍- Write clear, compelling, and brand-aligned email copy that resonates with different target audiences.
- Collaborate with designers (or use templates) to ensure emails are visually engaging and consistent with brand identity.Write and generate all copywriting elements for f lows & campaigns and lay them out effectively in Figma for designers to bring together.

3. Campaign Management & Execution:
- Build, schedule, and deploy email campaigns and newsletters.
- Manage contact lists, ensure accurate audience segmentation, and handle campaign scheduling across multiple time zones.

4. Automation & Workflow Setup: Develop and optimize automated workflows.

5. Client Reporting: Prepare detailed monthly reports that provide clients with a clear understanding of campaign results and future opportunities.

6. Deliverability & Compliance: Maintain list hygiene, ensure GDPR/Can-Spam compliance, and apply best practices for deliverability.

7. Project Management: Manage multiple client accounts simultaneously, ensuring deadlines are met and expectations exceeded.

8. Innovation & Industry Awareness:
- Stay informed on email marketing best practices and trends across different industries.
- Introduce fresh ideas and creative approaches that enhance engagement and ROI for clients.

Who is not a good fit

❌ Individuals lacking initiative or depending heavily on leadership for problem-solving.

❌ Those not adaptable to a dynamic agency environment or diverse client niches.

❌ Individuals not willing to immerse in continuous learning or contribute to a collaborative team.

This role is perfect if you…

✅ Self-starters with a strong understanding of email marketing fundamentals, CRM strategy, and client communication.

✅ Experience creating and managing email campaigns across different industries (e.g., real estate, hospitality, legal, construction, professional services).

✅ Excellent communicators, ready to lead a team, present strategies to clients, and work well within an agency setup.

✅ Individuals keen on continuous learning, eager to grow within the evolving retention marketing space.

Benefits

✔ Be part of a growing, exciting and Top 50 UK Agency.
✔ Career development as the agency grows
✔ Be part of a movement aiming to dominate the marketing space in eCommerce for CRM.
✔ Engage with a supportive, collaborative team while working on diverse and exciting brands.
✔ Competitive Salary
✔ Work with high-profile brands, providing ample opportunity to build a standout portfolio.
✔ A flexible and friendly work environment.
✔ 28 days holiday per year, excluding bank holidays
✔  Health cover for medical treatments, appointments and services including physiotherapy, dentists, opticians, mental health counselling and additional well-being services.

Sound good? Great!

Here’s how to Apply:

Stage 1: Complete the pre-screening form here: SCREENING FORM
If you are successful, you will move onto the next phase of our interview process.

Stage 2: Interview with Head of Department Will → Vibe Check!
If you are successful with the interview, you will move onto the trial assessment.

Stage 3: Trial Assessment → Will be a role-focused task.

Stage 4: Shortlist all candidates

Stage 5: Present you with an offer to join our team

FAQ:

Commitment: Full-time, Mon-Fri, 9:00am - 5:30pm

Location:
25 Dale St
Manchester
M1 1EY
United Kingdom

Salarty: TBD

Who We Are

Serotonin is a performance-driven creative agency based in Manchester. We exist to help consumer brands grow by turning creativity into performance — and performance into culture.
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Our clients range from heritage fashion labels to high-growth property brands and global lifestyle businesses. We're not here to just “do social”. We're here to help brands create content that earns attention, starts conversations, and delivers real business outcomes.
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And now, we’re hiring a Creator to help make that happen.

The Role

You live online. You think in memes, TikToks, carousels, and captions. You're a born creator — with a talent for making standout content and a hunger to learn how that content fits into a broader strategy.
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This is a junior role, but it’s a hands-on one. You’ll be in the mix with clients, strategists, and creatives — helping to ideate, produce, and publish content across multiple platforms.
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You’ll support our Post Creative Strategists with research, planning, content production, and scheduling. You’ll spot trends, pitch ideas, edit clips, and build the kind of scroll-stopping assets that get brands noticed.
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If you’ve got a solid creative skillset (design, editing, copywriting — or all three), and you want to apply it to fast-paced, high-energy agency work, this is for you.

What You’ll Do

• Create content for Instagram, TikTok, LinkedIn, YouTube Shorts, and more — from carousels and captions to video edits and meme posts

• Assist in building and scheduling monthly content calendars for multiple clients

• Support the Post Creative Strategists with research, social listening, and trendspotting

• Capture and edit content from on-site content days or remote asset drops
  

• Write engaging, on-brand captions, headlines, and social copy tailored to platform and audience

• Turn static or video assets into multiple social-ready formats (clips, gifs, thumbnails, reels, quotes, etc.)

• Monitor social trends, sounds, creators, formats, and viral moments — and use that insight to inform ideas

• Collaborate closely with the creative, performance, and strategy teams to bring campaigns to life
  

• Take and implement feedback quickly, and manage multiple tasks with pace and energy
  

What You Bring

• 1+ years experience in a similar role — freelance, in-house, agency, or self-initiated
  

• Confident using design and editing tools like Canva, CapCut, Adobe Suite, or similar

• Excellent attention to detail in copywriting and visual layout
  

• Strong understanding of social platforms and what works best on each

• A portfolio (or social feed) that shows you get content — whether that’s your own TikTok, client work, or personal projects

• Energy, passion, and a collaborative spirit — you care about the craft, and about your team
  

• Interest in creative strategy and how content ladders up to campaign goals
  

Perks of the Role

• £25,000

• 28 days holiday + bank holidays

• Private health insurance, including mental health support

• Daily breakfast and stocked snack bar

• Regular team socials (Barry’s Bootcamp, self-defence, comedy nights, etc.)

• Weekly team run club

• Pet-friendly Manchester office

• Opportunity to learn from experienced creatives, strategists, and performance marketers

• A seat at the table — you’ll be hands-on with real brands, not stuck in the background

Overview

We are currently recruiting for an Account Executive role to support the Account Manager at Serotonin. As an Account Executive, you will assist in the day-to-day management of both media and creative clients, providing essential support to the Account Manager and broader Account Management team.

This is a fantastic opportunity to gain a deep understanding of project and retainer work while contributing to the success of our valued clients.

Requirements

• Be a point of contact for client communications, ensuring smooth coordination between the client and internal teams.

• Assist in managing ongoing activities across client accounts, staying informed about key project deliverables and timelines.

• Help prepare proposals, presentations, and reports in collaboration with the Account Manager and relevant team members.

• Attend client meetings, take detailed minutes, and ensure actions are followed up promptly with both clients and internal teams.
  

• Provide administrative support by organising documentation, scheduling meetings, and ensuring deadlines are met.

• Prepare regular reports and performance summaries for the Account Manager and clients, ensuring data is accurate and insights are clear.

• Support the Account Management team by coordinating resources across creative and media teams, ensuring the smooth execution of client deliverables.
• Work closely with the Account Manager to ensure all client requests are actioned promptly and that progress is communicated effectively.
• Assist with tracking project progress, identifying potential challenges, and helping to resolve any roadblocks.
• Build strong relationships with clients through clear and consistent communication, handling day-to-day requests with professionalism and efficiency.
• Assist in developing monthly communication plans, ensuring client approval and engagement.
• Share weekly performance updates with clients to keep them informed and engaged with ongoing activities.

Roles & Responsibilities

• Some experience in an account management, client services, or marketing role (internships or junior roles are welcome) ideally within a marketing agency background
  

• Ability to handle multiple tasks efficiently and meet deadlines.

• Strong communication skills, with attention to detail and accuracy.
  

• Highly organised with good time management skills to support multiple projects.

• A proactive attitude with the desire to learn and grow within the role.

• Familiarity with digital marketing channels (e.g., PPC, SEO, Paid Social) and understanding their impact on client business goals.
  

• Interest in digital marketing and willingness to stay up-to-date with industry trends.
  

What We Offer

• 28 days holiday per annum (not including Bank Holidays)

• Health insurance, including mental health and counselling support

• Free daily breakfast provided in the office

• Salary ranging between £22,000 - £26,000 D.O.E
• At least 6 quarterly social events as part of the Serotonin social calendar, including yoga, Peak District hikes, and comedy nights
• Team lunches/dinners
• Pet-friendly office (hope you like dogs 🐶)
• Access to reduced optician and dental fees (via Health Shield)

Overview

This role is not for everyone.

We’re not looking for someone to run campaigns. We’re looking for someone to own them — to take real responsibility, drive results that matter, and help shape the next chapter of our agency’s growth.

About Us, Serotonin

We’re a performance-driven digital marketing agency based in Manchester, working with eCommerce, lifestyle, and FMCG brands that are serious about growth. Our clients range from funded start-ups to established global names - and they come to us because we get results.

We do strategy. We do media. We do growth.

At Serotonin, there’s no red tape, no middle management bloat, and no “coasting” culture. We move fast, challenge mediocrity, and expect everyone here to raise the bar - for themselves and others.

What You'll Do

• Own paid social campaign performance from strategy to execution — across Meta, TikTok, LinkedIn & more

• Launch, optimise, test, and scale campaigns based on hard data and sharp thinking

• Collaborate with creative, strategy, and media teams to build campaigns that actually convert

• Report with clarity - not vagueness - and tie everything back to performance

• Contribute to audits, forecasts, strategic planning, and client presentations

• Actively seek ways to do better: faster, smarter, and leaner

• Work closely with the Head of Paid Social and challenge ideas when needed

This role isn’t task-based. It’s outcome-based. Your performance is measured on results, not inputs. That’s the kind of freedom - and pressure - we offer.

What You'll Need

• 2–3+ years’ experience running campaigns in Meta Ads Manager

• Evidence you’ve improved performance on real campaigns (not just hit “boost”)

• Strong data and analysis skills (Google Sheets & Excel)

• Strategic thinking — you don’t just follow instructions, you ask why

• Ability to prioritise and manage time across multiple client accounts

• Experience with TikTok, LinkedIn or other paid social platforms is a bonus

• Desire to grow, learn, and level up — quickly

• Comfortable receiving and giving honest feedback

• Hunger to win, not just work

What You'll Get In Return

💸 £28,000–£30,000 DOE
🧘♀️ 28 days holiday (plus Bank Hols)
🕐 Flexible start/finish times
🥣 Free daily breakfast
🧠 Private health insurance (incl. mental health support & dental/optical perks)
🐶 Pet-friendly office
📅 Social calendar: hikes, comedy nights, yoga, and more
🍕 Team lunches & dinners
🚀 A role with runway - if you’re hungry to grow, we’ll back you

Who Thrives Here

You’ll thrive at Serotonin if:

• You take ownership of problems and outcomes, not just tasks

• You believe feedback is a gift — and you actively seek it

• You prefer freedom and high expectations over micromanagement

• You’re obsessed with improving: yourself, your campaigns, your team

• You think commercially, not just creatively

• You want to be surrounded by people who make you better

You won’t thrive here if:

• You’re looking to coast

• You don’t want to be held to a high standard

• You’re uncomfortable with change, challenge, or direct communication

Recruiters - we mean it:

We don’t work with you. Don’t call, email, or try.

About us:

Established in August 2019, we've seen rapid growth. We are a passionate team of 20, and we're keen on adding a member who aligns with our vision and growth trajectory. Our office, located in the heart of Manchester, promotes a casual and relaxed atmosphere.
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The right candidate: MUST HAVE <2 years experience managing PPC & Google Shopping campaigns and wants a new challenge to work part of a small, fast-paced team on delivering campaigns at a global level

About the Role:

• Scope: You'll manage integrated PPC campaigns for e-commerce and lead generation clients spread across the UK, Dubai, Switzerland, Italy, & the USA.

• Budget Handling: Our monthly Google ad spend ranges between £50,000 and £250,000. You'll be a crucial player, joining two other PPC managers in optimising this spend.

• Key Responsibilities:Management of 10-15 PPC Ad Accounts.

• Developing Google Shopping campaigns.

• Managing Product Feed optimisations.

• Forecasting campaign strategies.

• Leveraging keyword planning tools for opportunities to grow accounts.

• Growth Opportunities: We're a fast-growing team. If you're less experienced but eager to learn, we provide training courses to upskill.

Why Join Us:

• Competitive Salary: £25,000 - £30,000, depending on your experience.

• Holistic Health Coverage: Provided by Healthshield including Eye & Dental care benefits and mental health counselling and support.

• Company pension.

• 30 days holiday package, plus bank holidays, plus company away days.

Application Process:

• There will be a maximum of three interviews, the second and third may be online

• Do not apply via a recruitment consultant - we do not work with them.

• Recruiters please do not contact in relation to the role. We will not work with you.