Fullstack Engineer - AI-Powered Builder, Flexible Remote

FunnelFox; Województwo mazowieckie; Remote; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Flexible remote work

Direct communication and real impact

High ownership and fast-moving startup

Language learning budget

Professional development

Mental health support

Sports & health insurance

Job summary

FunnelFox, a no-code platform that helps app developers grow revenue through web2app funnels, is hiring a Fullstack Engineer to own features end to end. You’ll combine engineering skills, product thinking, and direct collaboration with the business to ship AI-powered capabilities that clients experience quickly.

You’ll work across frontend and backend (roughly 50/50), collaborate with Product, and take ownership of your area of the product while ensuring quality with the QA team.

Qualifications

• Solid professional experience in fullstack development.
• Experience with a modern frontend framework (Svelte) and a Go backend.
• Experience owning features from requirements to production.
• Experience in product teams or startups with focus on speed and direct communication with the business.
• Practical experience using AI tools in daily work (MCP is a big plus).
• Experience with databases and working with data.
• Product and business orientation: you think about user impact, not just code correctness.
• Autonomous, proactive working style, clear written communication, and the ability to learn fast.

Responsibilities

• Own delivery of builder features end to end, from the first conversation with Product to checking how they work for real clients.
• Build AI-powered functionality: the AI agent, MCP, and AI-based funnel generation.
• Work across frontend and backend (roughly 50/50, sometimes leaning toward frontend) and build integrations.
• Partner closely with Product to clarify business expectations, discuss edge cases, and shape solutions.
• Take ownership of your own area of the product and be the go-to person for it.
• Take responsibility for the quality of what you ship, together with the QA team.
• Share progress through milestones, decompose complex tasks, and raise questions early so nothing gets stuck.

Skills

Fullstack development

Svelte frontend

Go backend

Feature ownership

AI tools experience

Database experience

Product/business oriented

Autonomous work style

Tools

MCP

Job description

FunnelFox, a no-code platform that helps app developers grow revenue through web2app funnels, is hiring a Fullstack Engineer to own features end to end. You’ll combine engineering skills, product thinking, and direct collaboration with the business to ship AI-powered capabilities that clients experience quickly.

You’ll work across frontend and backend (roughly 50/50), collaborate with Product, and take ownership of your area of the product while ensuring quality with the QA team.