Software Backend Engineer, Platform ($198k - $295k + equity) at Hex

Who We're Hiring For

A pre-seed health and fitness app studio building a portfolio of creator‑led wellness apps, founded by serial entrepreneurs who have bootstrapped and sold companies in the app space.

Role Snapshot

Performance Manager who will own paid acquisition across mobile and web channels to drive growth for a portfolio of fitness apps from the ground up.

Compensation

Base salary around €90k + equity

What This Role Is About

You will join a small growth team inside a 10‑person company and own the paid acquisition strategy across all channels. The company partners with influencers, trainers, and athletes who bring audiences, and your job is to turn that attention into installs, subscribers, and revenue through paid campaigns. You will own campaign strategy and spend across TikTok, Meta, Applovin, UAC, and web subscription funnels.

Location

Paris, France. Onsite.

What Makes This Opportunity Exceptional

• You are shaping the growth engine at a company with €4M in pre‑seed funding and founders who have already built and sold app businesses.
• The creator‑led model means you start with built‑in distribution through real audiences, not cold acquisition alone.
• A 10‑person team where your work directly sets the trajectory. Lots of room to grow into a leadership role as the company scales.

What You'll Be Responsible For

• Plan, launch, and optimize paid acquisition campaigns across TikTok, Instagram, Meta, Applovin, UAC, and emerging channels, including managing budgets, creative testing, and attribution.
• Build and optimize web subscription funnels end to end, from ad click through to payment, using A/B testing and analytics to improve conversion at every step.
• Own ASO, search ads, and conversion rate optimization while setting up the analytics infrastructure to measure performance and automate UA workflows.

Who Will Thrive in This Role

• You have 5+ years running paid acquisition campaigns and can show concrete results across multiple channels, especially TikTok and Meta. Mobile app marketing expertise is a strong asset.
• You are comfortable at an early stage company. The playbook is still being written, and you will need to move fast across channels without waiting for direction.
• You are data‑driven but also creatively sharp. You will need to test and scale ad creatives yourself, not just manage dashboards.

How to Apply

• Apply in 2 minutes via Standout, your AI career agent
• Click "Apply with Standout"
• Have a chat with the agent
• If you are a fit get fast tracked directly to the hiring team
• If not get matched with other opportunities in the Standout network