Post Creative Strategist (Social Media Manager)
Post Creative Strategist (Social Media Manager)
We’re Serotonin. A performance-led creative agency born in Manchester and scaling fast. Since 2019, we’ve grown into a 25+ person team working with some of the most exciting consumer brands in the UK and globally; think ASSOS of Switzerland, Riverstone Living, New & Lingwood and more.
We believe that creative wins customers. And performance keeps them. We exist to deliver both.
We’re not here to just post content and cross our fingers. We’re here to shape culture, start conversations, and convert attention into action.
The Role
We’re looking for a Post Creative Strategist - asocial-obsessed creative-thinker who lives online and knows how to turn community insights into scroll-stopping work.
This isn’t just a content scheduling job. It’s about thinking and moving like a creator. You’ll be in-platform every day, spotting trends, building community, fuelling influencer campaigns, and pitching ideas.
You’ll collaborate across strategy, performance, content, and creative to build always-on social calendars that actually work - not just tick a box.
If you thrive in a fast-paced agency, love turning real-time insight into reactive ideas, and believe brand isn’t what you say but what you post, then this could be your moment.
What You’ll DoContent & Channel Strategy
* Own the social strategy for multiple clients - from daily TikToks to long-form content campaigns
* Build monthly content calendars backed by insight, trends, and creative thinking
* Produce copy and caption banks that sound more like the internet and less like a press release
* Work with our creative and production teams to brief, plan, and execute content days/shoots
* Analyse what works (and what flops) across platforms and feed it back into your thinking
Community, Culture & Trends
* Stay glued to the algorithm - know what’s blowing up, what’s getting binned, and why
* Run daily social listening and trendspotting sessions
* Engage with followers, reply to comments, and help brands sound human
* Manage influencer outreach, product seeding, and brand partnerships
Strategy & Client Thinking
* Bring the voice of the customer into every campaign
* Write decks, insights, and creative rationales that sell the idea and the outcome
* Support client reporting with performance breakdowns, trend commentary, and forward recommendations
* Be the go-to for social-first ideas that ladder up to business results
What You Bring
* 2+ years in a similar social-first role — whether at an agency, in-house, or freelancing
* A finger on the pulse of TikTok, Instagram, YouTube Shorts, and whatever’s next
* Experience crafting content calendars, writing copy, and planning influencer or brand campaigns
* An instinct for what makes good content — plus experience with basic tools like Canva, CapCut, or Adobe Suite
* Confidence in front of clients and collaborators — you can pitch ideas clearly and back them up with insight
* Comfortable working fast, flexibly, and cross-functionally
* Strong understanding of marketing principles, and how brand and performance can work together
Perks of the Role
* Private health insurance, including mental health and counselling support
* Daily breakfast + stocked snack bar
* Quarterly social events (recent hits: Barry’s Bootcamp, comedy nights, self-defence classes)
* Weekly team run club (not mandatory — we promise)
* Pet-friendly office
* Team lunches, dinners, and random treats
* Access to reduced dental and optician fees via Health Shield
Seniority level
* Seniority level
Entry level
Employment type
* Employment type
Full-time
Job function
* Job function
Marketing and Sales
* Industries
Advertising Services
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