Skills

Test Market research Research Content Creation Marketing Analytics

Job Specifications

About Us

Thirdflow 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 Culture

We 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 Role

We 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 Responsibilities

Support the development and execution of content and demand generation playbooks
Assist with multi-channel marketing campaigns including email, social, paid and organic
Conduct market research, competitor analysis and audience insight projects
Contribute to content production across formats such as articles, social copy, email and research
Help track, analyse and report performance data
Collaborate with the team on client work, internal projects and new experiments
Contribute ideas and feedback to improve our systems and processes

You Will Thrive in This Role If You

Thrive in fast-paced environments, not afraid to take responsibility or learn from mistakes
Are a recent graduate in Marketing, Business, Communications or a related field
Have a strong interest in B2B marketing, content creation and digital strategy
Communicate clearly in writing and verbally
Are analytical, curious and detail oriented
Can work independently while collaborating effectively with a team
Want to learn fast, take ownership and build real career experience

Why Thirdflow?

Real responsibility and ownership from day one
Direct mentorship from experienced B2B operators
Exposure to the full marketing lifecycle including content, demand generation, analytics and strategy
Structured development and regular feedback
Competitive paid internship with the potential for a full time role
Flexible work environment with a mix of office and remote
An opportunity to help shape the culture of a growing agency

Duration: 3 to 6 months with potential extension or full time offer

Location: London office (Victoria) with flexible remote options

If 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.

About the Company

Our media-first approach helps B2B companies capture attention, build trust, and generate high-quality leads that convert consistently. We've helped scale some of Europe's largest B2B brands by focusing on what matters: creating content people actually want, delivering it where they already are, and building relationships that translate directly to business growth. Know more