Senior Full-Stack Developer (React Native & Node.js)

 

Hi there! 

We are STX Next, a global IT consulting company specializing in customer-focused software services. Join a group of 500 professionals dedicated to helping customers build outstanding products. Leveraging the latest advancements in the field, and a passion for innovation, we're shaping the future of technology one project at a time.

Are you the NEXT one? 

Type of contract

B2B Contract (Freelance / Short-Term: 6 months)

Location

Fully Remote (aligned with EU time zones)

Hourly rate Role description

Are you a battle-tested developer who thrives at the intersection of robust backend logic and seamless frontend experiences? We are looking for an experienced full-stack expert for a fast-paced, short-term assignment to act as a bridge between technology and business.

In this role, you will jump straight into an active codebase, advising clients and shaping technical roadmaps while rapidly delivering high-quality mobile features.

 

What you'll do

• Mobile & Backend Ownership: Build, refine, and optimise mobile features using React Native (Expo) and TypeScript, while ensuring scalable backend services within the Node.js and Firebase ecosystem.

• Architecture & Integrations: Implement complex mobile UI animations, in-app purchases, and third-party API integrations (such as DeepL and SendGrid).

• Consulting & Communication: Translate complex technical requirements into business value, collaborate directly with stakeholders, and advise on key technical decisions.

• Quality & Analytics: Ensure smooth application performance and error tracking using tools like Sentry and PostHog, while establishing shared standards and raising the bar for the entire team.

 

What we're looking for

Must have:

• Senior-level Expertise: Deep, hands-on production experience with React Native (including the Expo framework) and the modern Node.js ecosystem.

• Backend Mastery: Solid experience with Firebase services, core Node.js fundamentals, and relational databases (PostgreSQL, MySQL).

• Targeted Library Mastery: You don't just know React Native; you have deep, practical experience with our exact ecosystem. You are fluent in TanStack Query and Zustand for state/data, react-hook-form, Reanimated for UI, Typesense for search, branch.io for deep linking, and RevenueCat for monetisation.

• The "Consultant" Mindset: Excellent English communication skills (min. B2/C1+) to efficiently articulate technical decisions to non-technical stakeholders and peers, ensuring minimal management overhead.

 

Nice to have:

• Practical experience with AI-powered development tools (e.g., Cursor, GitHub Copilot) to enhance coding efficiency.

• Familiarity with targeted libraries for monetisation (e.g., RevenueCat) and advanced search functionalities (e.g., Typesense).

• Experience with Cloud & DevOps workflows (AWS, Docker, CI/CD).

 

What you'll get

Remote-First Flexibility

Stay where you feel most productive. Here’s a remote-first environment with the freedom to set your own schedule. Whether you need a midday break or a specific routine, we trust you to manage your time and deliver results while maintaining your personal well-being.

Collaboration Mindset

Facing a complex challenge? At STX Next, you collaborate with true enthusiasts and experts who prioritize professional support and direct, honest feedback.

Tech Events

Gain access to specialized knowledge through bootcamps, Strategic Skills Labs, and Tech Knowledge Hubs focused on AI, Data, and Cloud. Beyond our internal webinars and technical materials, we host branded meetups like DevDuck and PAIDA .