sun.store is Europe's B2B marketplace for solar and energy-storage equipment, connecting installers, distributors and wholesalers across the EU.

We are looking for a hands-on Growth / GTM Engineer who will own the entire customer funnel – from acquisition to repeat purchases. You will use AI, automation and modern data tools to build and optimize growth systems, delivering measurable business results.

Location: Warsaw, hybrid (2 days per week in the city-centre office).

Responsibilities

• Paid acquisition: Manage Google Ads and Meta Ads across European markets and languages. Acquire both buyers and suppliers, optimize CAC and scale profitable campaigns.
• Activation and conversion: Identify funnel bottlenecks, design experiments and implement improvements.
• Lifecycle marketing: Build onboarding, activation, retention and reactivation flows using Customer.io or similar tools.
• Outbound and partnerships: Develop automated, AI-powered prospecting and outreach systems using buying and selling signals.
• AI-native distribution: Develop sun.store's presence in ChatGPT, Claude and Gemini ecosystems, including AI apps, connectors and AI search.
• Analytics and tracking: Own GTM, GA4, server-side tracking, Meta Conversions API, Mixpanel, BigQuery and SQL-based analysis.
• Experimentation: Run structured growth experiments and turn insights into repeatable processes.
• AI and automation: Use AI agents, MCP servers, APIs and tools such as n8n or Make to automate campaigns, reporting, enrichment and workflows.
  
  

Tools and technology

Google Ads, Meta Ads, GTM, GA4, Customer.io, Mixpanel/PostHog, BigQuery, SQL, Looker Studio, Clay, Apollo, n8n, Make, APIs, MCP, Claude and AI coding agents.

What we're looking for

• 3+ years of experience in growth, performance marketing, marketing operations or GTM engineering.
• Proven results in acquisition, activation, conversion or retention.
• Hands-on experience with Google Ads and Meta Ads in multiple markets.
• Experience building lifecycle campaigns and automated outreach systems.
• Strong analytical skills, SQL knowledge and experience with product analytics.
• Ability to implement tracking and conversion integrations independently.
• Experience with APIs, webhooks, automation and AI agents.
• Practical coding skills and familiarity with AI-assisted development.
• Understanding of CAC, LTV, contribution margin and payback.
• English at C1 level or above; German, Dutch or French is an advantage.
  
  

Nice to have: Marketplace or B2B experience, solar or industrial-sector knowledge, international expansion, incrementality testing and Python or JavaScript skills.

What we offer

• Ownership of the full growth funnel and direct impact on business results.
• Modern technology stack and freedom to introduce new AI and automation tools.
• Opportunity to grow into a growth leadership position.
• 10 paid workation days annually, subject to contractual arrangements.
• Hybrid work: 2 days in the Warsaw office, the rest remotely.
• Private medical care through Lux Med.
• A fast-growing European marketplace in the photovoltaics industry, backed by an established industry parent company.
  
  

How we work

We are a small, high-trust team with minimal bureaucracy. You work directly with leadership, product and sales, make decisions independently and deliver measurable improvements quickly.

This is an individual contributor role, not a people-management position. You are responsible for execution across acquisition, lifecycle, outreach and analytics.

Recruitment process

• Introductory call (30 minutes).
• Interview with the hiring manager (60 minutes).
• Practical task (up to 4 hours): prepare a 90-day growth plan for one market and build one working automation or growth solution using AI.
• Final interview with leadership and reference check.
• Offer.
  
  

How to apply

Send us your CV or LinkedIn profile and, most importantly, examples of something you've built: campaigns, automations, AI agents, lifecycle flows or growth experiments, ideally with measurable results.

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