Full Stack Developer

JavaScript

Full Stack Developer

JavaScript
Włochy, Warszawa

Great Spire

Full-time
B2B
Mid
Remote
2 818 - 4 227 USD
Net per month - B2B

Job description

Great Spire is building a wellness-focused social platform and marketplace where seekers and practitioners can connect in a supportive, intentional space, with AI-powered features that make discovery and matching easier.

Role overview

Great Spire is looking for a Full-Stack Developer to help build and improve core product features across mobile (Flutter/FlutterFlow) and backend (Node.js / JavaScript / Xano). You will ship user-facing features, integrate APIs, and help keep the product stable, secure, and scalable.

Responsibilities

  • Build and maintain app features in Flutter and/or FlutterFlow (iOS/Android).

  • Develop backend services in Node.js using JavaScript (APIs, auth, integrations, business logic).

  • Connect frontend and backend cleanly (REST/JSON, data models, error handling).

  • Improve performance, reliability, and maintainability through refactoring and testing.

  • Collaborate with product and design to estimate scope, break down tasks, and deliver in iterations.

Requirements (must-have)

  • Strong experience with Flutter (state management, navigation, API integrations).

  • Strong JavaScript skills.

  • Comfort with Git-based workflows and code reviews.

  • Ability to work independently, communicate clearly, and take ownership.

  • Great spoken and written communication skills in English

Nice to have

  • Experience with databases (SQL or NoSQL) and backend architecture.

  • Experience with cloud deployments, CI/CD, and monitoring.

  • Experience building consumer apps or marketplace/social products.

What Great Spire offers

  • Real product ownership and fast iteration in a small team.

  • Remote work and async-friendly collaboration.

  • The chance to build a product in a large and growing wellness market.

Share your CV/portfolio here or at anna@greatspire.io.

Tech stack

    English

    C1

    Polish

    B2

    REST

    advanced

    Node.js

    advanced

    JavaScript

    advanced

    Flutter

    advanced

    Git

    regular

    SQL

    nice to have

Office location