HubMub
-
Hyrtek

Seniro Backend Dev. NodeJS/Typescript

Hyrtek
Spain · Full-time · Not Applicable
We are looking for a Senior Backend Developer to join our team and help us build a robust, scalable platform from the ground up, leveraging insights gained from our Beta and current product usage.

You will play a key role in designing and implementing the backend architecture that powers our application and integrations with various gym management systems across Europe.

Your Responsibilities

  • Design and implement the server-side application logic, develop APIs, create libraries, and manage system components.
  • Integrate with external services, such as different Gym Management Software, to enhance functionality and provide data insights.
  • Support our customers by implementing their feedback and resolving technical issues.
  • Collaborate closely with the team to build a consistent, efficient, and responsive application.
  • Write clean, maintainable, and well-tested code.
  • Communicate directly with clients for product conception, onboarding, and training purposes.
  • Occasionally travel within Europe to better understand gym workflows and user needs.


Required Skills & Experience

  • 10+ years of experience building backend systems (including at least 1 year using Node.js with TypeScript)
  • Proven production experience with SQL databases (ideally PostgreSQL using Prisma ORM)
  • Passion for mentoring and sharing knowledge with less experienced developers
  • Strong sense of ownership and commitment to writing high-quality, testable code
  • Fast learner with a creative mindset and problem-solving attitude
  • Customer-obsessed mindset you deeply care about user experience
  • Experience working in agile, fast-paced startup environments
  • Excellent communication skills; fluent English (C1 level)


What We Offer

  • Contract type: Freelance / Self-Employed (Autónomo)


Salary range: 50,000 55,000 gross per year

  • Fully remote work environment
  • Sport card to support your fitness goals
  • Private medical care
  • Exciting opportunity to shape a product from the ground up within a dynamic startup environment

Key Skills

Ranked by relevance

typescript postgresql responsive server sql
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Country Guide

Spain

Strong city options with excellent lifestyle

Posted
Oct 18, 2025
Type
Full-time
Level
Not Applicable
Location
Madrid
Company
Hyrtek

Industries

Technology Information Media

Categories

Information Technology

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