Senior Growth Marketer

About cside:

cside is the web security company focused on browser intelligence. We leverage deep browser internals knowledge and AI to detect what otherwise goes unnoticed — or is simply too cumbersome to catch. From identifying malicious JavaScript executions to preventing account takeovers and fraudulent account creations, we are building the next generation of defense against sophisticated web threats.

Our team is a highly specialized group of seasoned browser internals experts and real-time distributed systems engineers. We are building the infrastructure required to process complex signals at scale, turning raw browser data into actionable security intelligence.

Backed by $7.7M in pre-seed and seed funding, cside is already trusted by a diverse range of the world's largest brands. Our technology protects massive universities, global fast-food chains, e-commerce giants, online entertainment platforms, payment providers, SaaS companies, crypto exchanges, and travel networks.

This role is based in San Francisco. While much of our team works remotely across the globe, we bring everyone together twice a year for offsites in tropical locations

About the role:
We’re looking to expand our GTM team with a forward thinking full-stack marketer. Owning top of funnel, SEO, GEO, product releases, content and taking initiative on new marketing channels.

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, Pylon) 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 a mix of working at larger companies and smaller companies.

• You have experience achieving a lot with little. If you managed millions in ad-spend, that will not impress us here.

• 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

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

• 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 cside'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 cside:

• 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

cside offers:

• Quarterly offsite

• Generous work from home allowance

• Latest Macbook

• Stock options

• Market rate salary (seed stage)

• Take what you need PTO

• 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. cside 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.