Senior Full Stack JavaScript Engineer SaaS

Passion.io; Remote; PLN 210,000 - 295,000; Full time

Job summary

A leading mobile app development company is seeking a Senior Full Stack JavaScript Engineer to join their dynamic team. This role emphasizes both frontend and backend expertise, enabling the development of scalable applications that integrate cutting-edge technology, including AI features. Ideal candidates will have over 5 years of JavaScript experience and a strong product mindset. Enjoy the flexibility of a remote-first environment with ample perks including career growth opportunities and generous time off.

Benefits

Creative Freedom

Remote-First

Global Gatherings

Tech Gear Budget

Paid Parental Leave

24 paid vacation days + 10 Celebration Leave days

Qualifications

• 5+ years in JavaScript development, proficient in React, Node.js, and React Native.
• Experience in full stack development, building frontend and backend systems.
• Exposure to AI-powered tools, APIs, or projects.

Responsibilities

• Build and maintain scalable web and mobile apps.
• Design and optimize backend services and APIs.
• Collaborate on AI-driven features.

Skills

JavaScript development

React

Node.js

TypeScript

React Native

GraphQL proficiency

microservices architecture

AI-powered tools

Tools

AWS

CI/CD

Job description

> Build the Future - Power Full Stack Experiences (and explore AI along the way!)

Do you…..

💭dream in code

{JS} speak fluent JavaScript

🤖tinker with AI projects just for fun?

At Passion.io, we empower creators to launch impactful mobile apps that change lives. We’re on a mission to build game-changing experiences, and we need a Senior Full Stack JavaScript Engineer who can thrive across the stack while exploring the next generation of tech, including AI-driven features.

We’re looking for a world-class engineer who’s equally comfortable in the frontend and backend, with a product mindset that goes beyond code. If you’re excited about designing beautiful, high-performing applications and shaping scalable, resilient backends, all while having the opportunity to get hands‑on with AI-powered development - this is your moment! 👊

What You Can Expect ⚙️

Imagine joining a team where your skills shape both the look and the logic of cutting‑edge applications. You’ll…

• Full Stack Ownership: Build and maintain scalable web and mobile apps with React, React Native, Node.js, and GraphQL.
• Create end‑to‑end solutions from designing and optimizing backend services, APIs, and microservices to contributing to the Craft of intuitive, pixel‑perfect User Interfaces that perform beautifully on Web, iOS, and Android.
• AI‑Powered Features (Optional, but exciting!): Collaborate on the design and implementation of AI‑driven features using APIs like OpenAI or Gemini.
• Infrastructure Impact: Work with AWS to keep our systems secure, scalable, and lightning‑fast.
• Code Quality & Performance: Improve‑and keep our codebase clean, efficient, and easy to build on.
• Mentorship & Innovation: Share your expertise, guide junior engineers, and bring your freshest ideas to the table.

What We’re Looking For 🔍

Are you the frontend innovator we’ve been searching for?

✅ Must‑Have Experience:

• 5+ years in JavaScript development (React, TypeScript, Node.js, and React Native expertise)
• Proven experience in full stack development - building both frontend and backend systems
• Some exposure to AI‑powered tools, APIs, or projects (commercial or personal)
• GraphQL proficiency
• Solid understanding of microservices architecture
• Product Mindset: you think about the why behind the code

🤩 Bonus Points (bring these and we’ll be extra hyped!)

• Experience building AI models or advanced AI features
• Strong AWS and infrastructure skills
• Experience with basic DevOps (CI/CD, monitoring, or deployment pipelines).
• A sharp design intuition with an eye for UX/UI polish

❤️ The Passion.io Experience: What We Do & How We Work

At Passion.io, we’re on a mission to empower creators to build and monetize their own mobile apps - without coding. Our platform lets 15,000+ creators launch their own mobile apps and teach their passion - no code, no hassle, just impact. Over 200,000 users (and counting!) are learning through the apps they’ve built. You’ll be working inside a fast‑moving, fully remote team that’s passionate about creator economy, product‑led growth, and helping people succeed.

Here’s what makes working with us, well... kinda awesome 🤩

🌍 Remote‑First - Work from anywhere in the world!
✈️ Global Gatherings - We meet in epic locations (think: Croatia, Portugal, Greece).
📈 Career Growth - We invest in YOU with coaching, training, and conferences.
⚡ Creative Freedom - Your ideas shape the product. Your code powers the experience.
🖥️ Tech Gear Budget - Get the setup you need to create at your best.
🏝️ Time Off That Counts - 24 paid vacation days + 10 “Celebration Leave” days for holidays that actually matter to you.
👶 Paid Parental Leave - Because family first, always.

What your hiring journey looks like ⛵

We’re excited to share the path you’ll take as you explore this opportunity with us. We respect your time and skills, so our process is streamlined and engaging - Here’s what your adventure will look like:

• Initial Discovery: A quick discovery call with Monique, our Sr. Talent Manager, to align expectations.
• Showcase Your Skills: A live coding challenge where you’ll demonstrate your expertise and problem‑solving skills in a practical setting.
• Deep Dive: A technical discussion with our Principal Engineer, Darko, where you’ll explore AI implementations and architectural decisions.
• Vision Alignment: A final conversation with our Head of Engineering, Nuno, to ensure that your vision and our mission align perfectly.

👇 Ready to build the future (and your future) with us?

Whether you’re AI‑experienced or AI‑curious, if you’ve got full stack firepower and a product‑focused mind, we want to hear from you!

Hit APPLY and let’s shape what’s next together! 🚀