**Mid\-Level Backend Developer (Node.js / AWS) \- 100% Remote** **Company:** Gumb AG (www.gumb.app) **Location:** Remote (Portugal or EU timezone) **Type:** Full\-time contractor **Compensation:** €1'800 / month (net) **Start:** As soon as possible **About Gumb** Gumb is the all\-in\-one platform for groups of any size \- from clubs and sports teams to small businesses. With Gumb you can: \- See every team calendar \& availability – single or multi\-calendar, always in sync \- Track live RSVPs \& attendance – know who’s in at a glance \- Chat, announce \& organize – keep your community engaged \- Get data insights \& reports – make smarter decisions Organizers keep control, everyone stays connected. We’re a small, motivated startup based in Switzerland building real tools for real communities. **Your Role** We’re looking for a **Mid\-Level Backend Developer** who loves clean architecture, scalable systems, and practical problem\-solving. You’ll work closely with our founder and senior engineers to extend and maintain our backend stack. **Tech Stack** * **Node.js 16** (with Sequelize ORM) * **AWS Services:** Cognito, SNS, SES, RDS (PostgreSQL), Lambda, API Gateway, EC2, S3, CloudFront * **Serverless Framework** * RESTful API design \& integration with our React frontend **Your Profile** * 3–5 years of experience building backend systems (Node.js preferred) * Solid understanding of RESTful APIs \& client–server architecture * Experience with **relational databases (PostgreSQL)** * Familiarity with AWS ecosystem (Cognito, Lambda, RDS, S3, etc.) * Bonus: experience with Serverless Framework and scalable architecture * Independent, reliable, and structured way of working * English communication (written \& spoken) **What We Offer** * 100% Remote work (Portugal or anywhere in CET±1\) * Flexible working hours * Long\-term collaboration with monthly payments (via Wise) * Direct impact in a growing SaaS startup * Flat hierarchy, close collaboration with founder and tech team **How to Apply** Send us a short message and your CV or LinkedIn profile to: **careers@gumb.app** Tell us briefly why this role fits you and what you’ve built before. Job Types: Full\-time, Permanent Pay: 1,800\.00€ per month