Full-Stack Growth Engineer

Firsty makes connectivity instant. Role: Full-Stack Growth Engineer to own B2C user acquisition, full-stack development, and growth experiments. Work with founders in Amsterdam office.

• You take end to end ownership of our global B2C user acquisition strategy across paid, organic, and viral channels.
• Since you will not lead a team, you focus 100% on hands on execution. You personally launch and optimize performance marketing campaigns on Meta, TikTok, Google, and in app to drive efficient app installs.
• You own the funnel analytics and mobile attribution via AppsFlyer or an equivalent tool to identify bottlenecks and optimize for CAC, ROAS, CPI, and LTV.
• You design and execute fast paced experiments, ranging from landing pages and onboarding flows to referral programs and viral incentives.
• Finally, you work directly with product and engineering to ship growth features and maximize retention.

• You ship, fast. You build full-stack with modern tools and use AI like Claude Code to move at the speed of a small team on your own.
• Comfortable across the stack: React on the front end, a modern back end like Node or Go. Years do not matter, output does.
• A growth head. You care about activation, retention and conversion, and can read a metric and form a hypothesis.
• You own a surface from design to build to measure to iterate, without anyone holding your hand.
• You make technical products feel easy: good docs, clean APIs, real developer empathy. Stripe is the bar.

• €3,500 to €7,500 gross per month, depending on experience.
• Full ownership of your own surface, from design to build to measurement.
• Direct daily work with the founders in our Amsterdam office.