Freelance - Backend Developer PostgreSQL / Node (Mid-Senior)

SABIA Personal; España; A distancia; EUR 33.000 - 55.000; Jornada completa

Descripción de la vacante

A leading sales solutions company in Spain is seeking a backend developer with experience in Typescript and SQL databases. The role emphasizes building server-side applications and integrating with gym management software. Attractive salary and remote work offered. Ideal candidates have at least 4 years of experience and a passion for fitness.

Servicios

Attractive salary: 33-45k€ for Mid, 50-55k€ for Seniors

Sport card

Private medical care

Freelance hiring

Formación

• 4+ years in backend systems; 1 year with Typescript.
• Production experience with SQL (PostgreSQL preferred).
• UE citizenship required.

Responsabilidades

• Build server-side application logic and APIs.
• Integrate with external gym management software.
• Write clean and readable code.

Conocimientos

Backend system development

Typescript

SQL databases

Fluent English (C1)

Creative problem-solving

Good communication skills

Herramientas

AWS services

Prisma ORM

GraphQL APIs

Descripción del empleo

Overview

Our client is the 1st complete sales solution turning your Staff into high achievers. They are the only sales platform for Gyms that prioritises upselling and generating additional sales from your existing members.

Requirements

4+ years (for Middle) and +8 years (for Seniors) experience in building backend systems (including at least 1 year with typescript)

Production experience with SQL databases (ideally PostgreSQL using Prisma ORM)

• Good communicator (we expect fluent English - C1)

• UE citizenships
• You take responsibility for the quality of your work and write tests
• Love to learn with the ability to learn fast
• Creative and coming-up with new ideas
• Customer / end user obsession (yes, obsession is the right word)
• You enjoy working within a startup environment

Pluses

• Experience using AWS services, familiarity with AWS Lambda
• Experience in Serverless
• Experience with GraphQL APIs
• Additional European language fluency
• You love fitness or at least be a regular sport practitioner

What they offer

• Attractive salary: 33-45k€ (for Middle : +4 years of experience) and 50-55k€ (for Seniors : +4 years of experience)
• Remote work
• Freelance hiring
• Sport card
• Private medical care

About the Mission

Your mission will be to build from the ground up the software leveraging the experience acquired and current usage. Your tasks will be as following :

• Architecture & implementation of the server-side application logic, writing APIs, creating libraries, and working with system components
• Integration with external services, such as various Gym Management Software to provide rich functionality and data insights
• Supporting our customers, implementing their feedbacks and helping solve issues
• Exciting team collaboration to build a consistent, most cost effective & responsive application
• Writing clean & readable code
• Being in direct contact with our clients for conception and training purposes
• Travel to various European locations to understand gyms staff workflows