Senior Fullstack Engineer – Growth R&D
About the Role
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.
How we work
We’re a hybrid team – remote when it makes sense, onsite when it matters most.
Once per quarter, your whole team spends 5 working days together at our Wrocław office – a time for focused execution, unblocking work, and driving key outcomes.
Our office is open year-round – drop by anytime.
Benefits
We don’t want you to worry about all the basic benefits - like a Multisport card, private health care, or a home office equipment budget.
What we really want you to feel and what we believe in is that the real benefits come from the culture we’ve built.
With a hybrid work model, unlimited paid days off and sick days policy, an environment focused on outcomes instead of worked hours, and people dedicated to their work, you’ll find a workplace where you can thrive.
And here’s the icing on the cake: you’ll have the opportunity to work with the makers behind all Text products: Text App, LiveChat, ChatBot, HelpDesk, KnowledgeBase, OpenWidget.
Are you feeling like this might be a great place to consider working for? We feel it too ;) Join us and apply.