Full Stack Software Engineer - Python / Javascript

Influencity - Influencer Marketing Platform; Madrid; Híbrido; EUR 60.000 - 80.000; Jornada completa

Descripción de la vacante

A leading tech firm based in Madrid is seeking a passionate Senior Full-Stack Developer to join their Engineering team. The ideal candidate will have over 5 years of experience in Full-Stack development, particularly with SaaS products. The role involves designing effective database models, collaborating on UI design, and integrating APIs while focusing on user experience. The company offers flexible working hours, an employee benefits package, and a results-driven work environment.

Servicios

Flexible hours

Remote work

Medical & dental insurance

Performance reviews

Employee benefits package

Formación

• 5+ years of experience in Full-Stack development, ideally with SaaS products.
• Proficient in JavaScript, Node.js, React; TypeScript knowledge is appreciated.
• Experience with Express, GraphQL, MongoDB, and strong SQL background.

Responsabilidades

• Design database models and build APIs for user-facing platforms.
• Collaborate on high-fidelity front-end UIs.
• Integrate APIs and manage large data sets.

Conocimientos

Full-Stack development

JavaScript

Node.js

React

TypeScript

Express

GraphQL

MongoDB

AWS

DevOps

Herramientas

Docker

GitHub Actions

Jest

Playwright

Mocha

Chai

Descripción del empleo

Overview

We are looking for a passionate Senior Full-Stack Developer to join our Engineering team. You will work closely with our Product and Design teams to develop complete Full-Stack features—from robust backend logic to polished user interfaces. Although we offer flexible hours and remote work, this position is primarily based in Spain.

Responsibilities

• You will design the database models, build the APIs, and implement the Pixel Perfect frontend.
• Frontend Excellence : Collaborate with the Product and Design teams to implement high-fidelity UIs. We value developers who care about the final user experience as much as the code structure.
• Data Integration : Work closely with the Data team (Python stack) to integrate proprietary APIs and large volumes of external data into the user-facing platform.
• Architecture & AWS : Design cloud-native solutions on AWS, ensuring the long-term sustainability and security of the infrastructure. Move the infrastructure toward scalable, cloud-native best practices.
• Leverage AI tools to accelerate development, write tests, and improve code quality.
• Technical Leadership : Mentor mid-level and junior developers, guiding them in best practices, clean code, and architectural decisions. Help the team stay motivated and aligned.

Experience & Skills

Experience: 5+ years of experience in Full-Stack development, preferably working on SaaS products delivering end-to-end features.

Core Stack: JavaScript, Node.js, and React (Next.js in the frontend). If you think that TypeScript is the way to go, great.

Backend & Data : Proven experience with Express, GraphQL, Apollo Server, NestJS, and MongoDB. Strong SQL background (PostgreSQL, DynamoDB) is a plus.

Cloud & Infra : Strong experience with AWS (heavily used), Vercel, and GitHub Actions. Docker experience is valued.

DevOps & Testing : Solid background with testing frameworks such as Jest, Playwright, Mocha, or Chai.

A strong eye for detail in the frontend with a focus on Pixel Perfect results. Knowledge of Python is a plus for collaboration with our Data team.

Culture & Collaboration

You understand that great software is built by great teams. You value product-oriented thinking and strong collaboration across Backend, Frontend, Design, and Data teams. As a Senior profile, you will bridge data and user experience and help ensure data flows from our backend services to a pixel-perfect frontend.

Location & Perks

On your first day, you will be welcomed at our Madrid office. Flexible hours and remote work in a results-oriented environment. Performance reviews twice a year. Employee benefits package (transport, training, meals, gym membership discounts, childcare and more). Medical & dental insurance.

About Influencity

Influencity is a fast-growing company where learning and professional development are part of our culture. We are building the most complete AI-powered influencer marketing platform and aim to become the global leader in influencer marketing.