Senior Full Stack Engineer

Ersilia; Barcelona; Hybrid; EUR 65,000 - 95,000; Full time

Job summary

Ersilia is seeking a Senior Full Stack Engineer to design, build, and own product features, collaborating with tech leadership to deliver high-quality software used daily by customers.

You will work across frontend and backend, focusing on delivery, quality, and collaboration. The role emphasizes autonomous work and strong engineering practices, with a hybrid model based in Barcelona.

Qualifications

• Experience building production web applications.
• 4+ years experience with React, Node.js and TypeScript.
• Good understanding of relational databases (PostgreSQL or similar).
• Experience working across the full product lifecycle.
• Ability to work autonomously.
• Advanced English; Spanish would be advantageous.

Responsibilities

• Design, build, and maintain fullstack features across the products.
• Work with React on the frontend and Node.js on the backend.
• Collaborate closely with Product and Design to turn requirements into solutions.
• Ensure code quality through testing, reviews and best practices.
• Contribute to technical discussions and propose improvements to the codebase.

Tools

React

Node.js

TypeScript

PostgreSQL

AWS

Job description

The Senior Full Stack Engineer will build and own product features

working closely with the tech leadership. You will contribute to both frontend and backend systems, helping ship high quality software that is used daily by customers.

This role is focused on delivery, quality and collaboration with the ability to influence technical decisions.

Your responsibilities:

• Design, build, and maintain fullstack features across the products
• Work with React on the frontend and Node.js on the backend
• Collaborate closely with Product and Design to turn requirements into solutions
• Ensure code quality through testing, reviews and best practices
• Contribute to technical discussions and propose improvements to the codebase

What we are looking for:

• Strong experience building production web applications
• Minimum 4 years experience with React, Node.js and Typescript
• Good understanding of relational databases (PostgreSQL or similar)
• Experience working across the full product lifecycle
• Ability to work autonomously
• Advanced level English plus Spanish would be advantageous

Tech Stack: Typescript, NodeJs, React, PostgreSQL and AWS

Based in Barcelona along with a hybrid working model