Senior Performance Marketer

About c/side:

c/side is laser focused on solving web security, starting with browser side injections. Covering previously unmonitored attack surfaces in developer and user friendly ways.

The team of c/side are a diverse mix of highly capable subject matter experts. We’re kind but we mean business.

Since January 2024, c/side has raised $ 7.7 million in pre-seed funding from Uncork Capital, Mantis Ventures, Scribble Ventures, Roar VC, Dan Scheinman, Jason Warner, Kathy Korevec and many more. A team of handpicked, high value add investors invested in helping our company and team grow. In Q1 we found nearly 300,000 websites with client-side attacks. We find high profile attacks regularly.

About the role:

A numbers driven person to drive top of funnel. SEO, SERP, LLM optimization, Ads performance, keywords... Making sure the top of funnel grows day by day.

This job spec relates to the first. But, like at any startup, we like people to be a flexible to an extent. You would be the DRI for the top of funnel tracking.

What you will do:

• Draft, implement and improve top of funnel strategies. Get leads flowing!

• Build, optimize, and scale multi-channel marketing campaigns across LinkedIn, Google, TikTok, Reddit, newsletters, and emerging platforms. SEO, SERP, LLM discoverability, Ads...

• Own reporting: develop dashboards, run A/B tests, and translate metrics into actionable insights

• Own the tech stack for GTM automation, creating systems that reduce inefficiencies and improve outcomes

• Design, run, and analyze iterative growth experiments across the entire funnel: acquisition, activation, retention, and expansion

• Automate lead scoring, account prioritization, and personalized outreach to maximize conversion rates

• Instrument and maintain our analytics stack (GA4, PostHog, HubSpot, SemRush, etc.) to provide a single source of truth on performance

• Partner with GTM & Product to launch self-serve onboarding flows and product-led virality loops

• Build automated lifecycle campaigns (email, in-app, webhook) that convert free customers to paying, retained customers

• Craft technical, value‑first narratives that resonate with security engineers & compliance leads.

• Report weekly insights and learnings

• Evaluate and unlock new channels to achieve step-change growth

About you:

• 3+ years driving growth for B2B SaaS (security or developer tooling preferred) with a clear track record of pipeline and revenue impact, ideally at a mix of a larger company and a smaller startup environment.

• You have achieved a lot with minimal resources. As a startup, we do not have millions to spend on ads, tell me what you can do with 200$.

• Experience with tools like Clay, HubSpot, Email delivery, etc..

• Ability to evaluate and adopt new tools to maintain a competitive edge

• Analytical to the core and comfortable building dashboards and explaining the "why" behind the numbers

• Autonomous: You'll own your domain and define how we grow

• Experimentation mindset; you default to hypothesis → test → iterate and openly share wins and failures

• Hands-on with the modern growth stack

• Able to translate complex security concepts into crisp, compelling value propositions for technical buyers

• Thrive in zero-to-one environments; biased toward action, embrace ambiguity, and ship fast without cutting corners

• Exceptional written and verbal communication skills; you write tight copy and influence cross-functional stakeholders

• Genuine passion for web security and belief in c/side's mission to protect developers and users

• Fully remote capable with at least 4 hours overlap with UK timezone; excited to travel for 2-3 company offsites per year and if interested in person conferences

At c/side:

• We’re constantly learning and developing better, we grow together

• We do not ship half projects, we do not sell snake oil, we don’t cut corners - out of respect for our team, our customers and our community. We put a dent in the universe by building good products

• Transparency and integrity above all

C/side offers:

• 2-3 Offsites per year (this changes from time to time)

• Generous work from home allowance

• Latest Macbook

• Stock options

• Market rate salary

• Take what you need PTO

• Fully remote

• Our team is invested in your long term career development. If you want to talk at events, we’ll make that happen, if you want to learn how to build your own startup one day, we’ll offer you a front line seat. C/side is built by folks like you.

We’re building a world class security company, and we simply want the best people for the job. We do not select or discriminate based on formal educational background, age, skin tone, religion, national origin, sexual orientation, gender identity, disability status, marital status, veteran status… we’re welcoming all and celebrate equal opportunities.