Marketing Intern

About UsThirdflow is a fast growing marketing agency built to solve the toughest problem in B2B: creating predictable, compounding demand. We design, strategise and execute content and demand generation systems that directly fuel revenue, not vanity metrics.Founded by operators who have scaled some of Europe’s largest B2B media companies, we partner with ambitious teams that want marketing to be their growth engine.Our CultureWe are builders. We move fast, test aggressively and improve continuously. We value clear thinking, strong execution and the ability to turn ideas into measurable outcomes.We are in a rapid growth phase and still refining our playbook as we scale. You will be joining a lean, driven team where ownership, initiative and curiosity matter more than job titles.This is not a passive internship or someone looking for a 9-5. It is for someone who wants to learn quickly, take real responsibility, contribute meaningful work from day one and willing to put in the work.About the RoleWe are hiring a Marketing Intern to support our content and demand generation work for both Thirdflow and our clients. You will work closely with the founders, get exposure to live projects and develop practical skills in how modern B2B growth engines operate.This internship is designed for people who want real, hands-on experience rather than observation.Key ResponsibilitiesSupport the development and execution of content and demand generation playbooksAssist with multi-channel marketing campaigns including email, social, paid and organicConduct market research, competitor analysis and audience insight projectsContribute to content production across formats such as articles, social copy, email and researchHelp track, analyse and report performance dataCollaborate with the team on client work, internal projects and new experimentsContribute ideas and feedback to improve our systems and processesYou Will Thrive in This Role If YouThrive in fast-paced environments, not afraid to take responsibility or learn from mistakesAre a recent graduate in Marketing, Business, Communications or a related fieldHave a strong interest in B2B marketing, content creation and digital strategyCommunicate clearly in writing and verballyAre analytical, curious and detail orientedCan work independently while collaborating effectively with a teamWant to learn fast, take ownership and build real career experienceWhy Thirdflow?Real responsibility and ownership from day oneDirect mentorship from experienced B2B operatorsExposure to the full marketing lifecycle including content, demand generation, analytics and strategyStructured development and regular feedbackCompetitive paid internship with the potential for a full time roleFlexible work environment with a mix of office and remoteAn opportunity to help shape the culture of a growing agencyDuration: 3 to 6 months with potential extension or full time offerLocation: London office (Victoria) with flexible remote optionsIf you are ready to kickstart your career and contribute to high impact B2B marketing, we would love to hear from you.Please send your application, including your CV and a short note on why you want to join Thirdflow, to careers@thirdflow.co.uk.Thirdflow is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees and interns.