The Challenge
fifty-five is scaling their Search & Social Media practice across 400+ employees globally. You'll own campaign strategy and optimization for major advertisers, working with a young, multicultural team that values excellence and continuous learning.
Your Mission
Master fifty-five's client portfolio and campaign structure; complete onboarding in Web Analytics and Media training
Optimize 3-5 active Google Ads and Facebook Ads campaigns, targeting 15%+ improvement in ROAS
Build proficiency in internal reporting systems and establish weekly performance review cadence with stakeholders
Identify and document optimization opportunities across search and social channels for quick wins
Manage full campaign lifecycle for 5-8 clients including strategy, execution, A/B testing, and monthly reporting
Achieve or exceed client KPIs (CPA, ROAS, conversion rate targets) on 80% of assigned accounts
Develop standardized playbooks for campaign setup, audience targeting, and bid management
Mentor junior team members and contribute to internal knowledge base for SEA/SMA best practices
KPIs You'll Own
ROAS (Return on Ad Spend)
Track campaign efficiency and revenue generated per euro spent on paid media.
CPA (Cost Per Acquisition)
Monitor acquisition cost efficiency and ensure alignment with client targets.
Click-Through Rate (CTR)
Measure ad relevance and creative effectiveness across search and social channels.
Quality Score (Google Ads)
Indicator of keyword relevance and landing page quality impacting ad costs.
Conversion Rate
Percentage of clicks that result in desired actions, critical for client ROI.
Tools & Stack
Your Team
Your Manager
Head of Paid Media or Digital Strategy Lead (not specified in posting)
Current Team
Young, multicultural team of 250+ in Paris, 400+ globally across 20+ nationalities
New role or backfill not explicitly stated; appears to be scaling the SEA/SMA practice
The Package
Salary
€45K-€55K base
Remote
Hybrid | 1 rue de Saint-Pétersbourg, 75008 Paris (near Saint-Lazare)
Benefits & Perks
Company Intelligence
fifty-five is a 400+ person digital marketing and data marketing agency with 250+ employees in Paris and offices globally. They specialize in customer acquisition campaigns for major advertisers, with a flat, multicultural structure and commitment to continuous learning.
Team Size
400+
Customers
Major advertisers requiring Search and Social Media campaign management
Culture
Excellence, benevolence, knowledge-sharing. Strong emphasis on work-life balance, diversity/inclusion, and internal mobility. Active CSR programs (Data Hive, DEI@55, Sustainability@55).
Is This Role For You?
- You have 3-4 years running Google Ads and Facebook campaigns with proven ROAS/CPA results
- You're obsessed with data, Excel modeling, and turning numbers into strategy recommendations
- You want exposure to international clients and potential internal mobility across 400+ person global team
- You thrive in a young, collaborative environment where learning and growth are prioritized over hierarchy
- You're looking for 100% remote—this is hybrid Paris-based with expectation to be in-office regularly
- You prefer specializing deep in one platform rather than managing both SEA and SMA holistically
- Corporate structure and job security matter more than growth potential and learning velocity
Interview Process
Application Review
CV and cover letter screening against education (Bac+5/Grande École preferred) and 3-4 years paid media experience
Phone Screen
Discussion of campaign management experience, tool proficiency (Google Ads, Facebook Ads), and analytical mindset
Technical Test
Likely case study or campaign analysis task to assess optimization thinking and Excel skills
Team Interview
Meet with hiring manager and peers to evaluate cultural fit and growth mindset
Offer
Negotiation based on experience level; start date June 2026
Interested in this role?
Apply now and hear back within days, not weeks.
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About Growth Marketing Roles
Growth marketers drive user acquisition, activation, and retention through data-driven experimentation. They sit at the intersection of product, data, and marketing — running A/B tests, building funnels, and scaling what works.