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Senior Fullstack Engineer

Develop scalable internal automation tools to boost user engagement and acquisition
Lower Silesian Voivodeship, Poland
Senior
yesterday
LiveChat

LiveChat

An online customer service software with live support, web analytics, and help desk integration features.

Senior Fullstack Engineer

We're looking for a product-minded Fullstack Engineer to join our Growth R&D team. This is a high-impact engineering role focused on building web-based tools, experiments, and internal automations that power scalable user acquisition and engagement strategies.

You'll work side-by-side with our Head of Growth to create, test, and iterate on product-led growth initiatives — from standalone tools (like Typing Speed Test or AI Email Generator) to data-driven content engines, automation frameworks, and internal growth infrastructure.

The ideal candidate is comfortable working across the stack (React + Node.js/Fastify), thrives in fast-paced, experimental environments, and is excited about building things that go live quickly and are seen by millions of users. This is not a feature factory — we build things that grow.

Responsibilities

  • Build and scale fast, high-performance web applications and microtools
  • Design and implement backend APIs and data pipelines using Node.js and Fastify
  • Integrate third-party APIs and external data sources to power new products
  • Maintain and evolve existing tools and platforms with a focus on performance and SEO
  • Participate in growth experiments, prototyping, and rapid iteration cycles
  • Ensure code quality, scalability, and maintainability across projects
  • Own the end-to-end delivery — from concept to deployment

What We're Looking For

  • 5+ years of experience building production-grade fullstack applications
  • Solid knowledge of modern JavaScript (ES6+), React, and Node.js
  • Experience with backend development (REST APIs, Fastify, or Express, async workflows)
  • A product-focused mindset: you care about impact, not just code
  • Experience with rapid prototyping and iterative engineering
  • Strong understanding of web performance, SEO fundamentals, and data flow
  • Ability to work autonomously and iterate quickly based on feedback and metrics
  • Bonus: experience working on tools, automations, or SEO-driven platforms

This role is perfect for a builder — a creative engineer who loves turning raw ideas into polished, working products. If you enjoy hacking on fast-moving projects and solving real-world problems through code, let's talk.

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Senior Fullstack Engineer
Lower Silesian Voivodeship, Poland
Engineering
About LiveChat
An online customer service software with live support, web analytics, and help desk integration features.