Growth Engineer (Freelance Part-time)

Were looking for a Growth Engineer: someone who loves bridging the gap between marketing creativity and technical execution.

Youll be the go-to person to unblock our marketing team helping them turn ideas into scalable data-driven campaigns that actually ship.

Your first mission: lead our migration from Mailchimp to Klaviyo and set up multichannel customer journeys across email WhatsApp and our app (Odisei Play). From there youll help us build the foundation for smarter automated growth across our tools and data ecosystem.

Youll work closely with our marketing team and our in-house Automation & Data Systems Engineer to connect systems clean up tracking and bring clarity on how our campaigns and efforts translate into sales.

Tasks

1. Growth Experimentation & E-Commerce Ops

Youll be the marketing teams technical backbone helping launch experiments fast while owning the performance and flexibility of our ecommerce stack.

• Help prototype and test new ideas quickly: landing pages A/B tests or funnel experiments.
• Prototype and ship growth experiments that drive conversion and retention
• Own the tech side of our ecommerce setup (WooCommerce now Shopify soon)
• Make small store updates or work with our contractor on bigger improvements
• Ensure our site is fast trackable and ready for marketing at all times
• Bring sharp creative ideas to boost performance across the funnel

2. Marketing Systems & Automation

Youll own the core tools and automations that bring our customer communications to life across all channels (social email WhatsApp in-app touchpoints...).

• Oversee the migration from Mailchimp to Klaviyo ensuring data integrity and proper segmentation.
• Define build and optimize automated customer journeys across email WhatsApp and in-app notifications.
• Set up dynamic flows for onboarding re-engagement upsell and post-purchase experiences.
• Help unify customer data across tools for smarter targeting and personalization.
• Bring fresh practical ideas for improving reach conversion and retention through automation or creative use of data.

3. Analytics & Data Integration

Youll help make sense of our marketing-related data: connecting tools and surfacing the right signals to understand how were doing and where to improve.

• Collaborate with our Data Engineer to connect marketing sales and app data.
• Define clear metrics and dashboards to measure marketing performance and ROI.
• Ensure tracking consistency across Shopify Klaviyo PostHog and ad platforms.
• Debug validate and optimize GTM ad pixels and conversion events.

Requirements

Technical Skills

• 4 years experience in technical marketing growth engineering or marketing automation
• Hands-on experience and proven results with marketing automation tools like Klaviyo (flows segmentation API integration)
• Strong understanding of tracking and attribution (GTM GA4 Meta/LinkedIn pixels UTM logic)
• Experience setting up and integrating marketing and ecommerce tools (Shopify Klaviyo GTM CRM analytics etc.)
• Comfortable writing small scripts or building UI prototypes (preferably in JavaScript)
• Understanding of email deliverability multichannel marketing and funnel logic
• Familiarity with B2C/B2B ecommerce and SaaS funnels (bonus if youve worked with both!)
• Scripting and automation experience a plus (JS Python or tools like n8n/Zapier/Make)
• Creative curious and comfortable experimenting with new tools or workflows

Mindset & Qualities

• Growth hacker mindset: You think outside the box and use smart sometimes unconventional strategies to reach the right audience.
• Impact-obsessed: You want everyone in the world to know they can play sax silently; or learn it from scratch in 30 minutes!
• Systems thinker: You see how data tools and marketing flows connect.
• Pragmatic builder: You prefer something done and useful today over perfect in theory.
• Cross-functional collaborator: You speak both marketing and tech.
• Curious and proactive: You bring ideas to the table not just tasks to deliver.
• Data-driven: You love tracking real impact: what works what doesnt and why.
• Music-aware: You dont need to be a musician but you understand the magic of music and want to help others experience it too.

Benefits

• Freelance or part-time (23 days/week to start)
• Competitive compensation
• Can be in-person/hybrid in Barcelona or remote in Europe
• Flexible working culture
• Direct impact on the future of music education technology
• Collaborative and innovation-driven environment

At Odisei Music were building the future of wind instruments making it easier smarter and more fun to learn and play.

Youll be joining a multidisciplinary team of musicians engineers and designers who care deeply about quality and innovation.

This is a freelance role with potential to grow into a longer-term collaboration if were a great fit.

Youll work directly with the CTO and marketing team and have a clear impact on how we reach and engage musicians worldwide.