Mid/Senior Backend Engineer - Python

AddYou; Barcelona; Híbrido; EUR 50.000 - 55.000; Jornada completa

Descripción de la vacante

A recruitment consultancy is seeking a Mid/Senior Backend Engineer experienced in Python to join a fast-growing technology company in Barcelona focused on energy transition. The role involves developing backend architecture for a battery management platform. Candidates should have over 4 years of experience in backend development, especially with Python and AWS. The position offers a hybrid work model, full-time, permanent contracts, and an annual salary of €50,000 – €55,000.

Servicios

Hybrid work model based in Barcelona

Meaningful mission contributing to sustainability

High-performing technical team

Fast-moving environment encouraging innovation

Formación

• 4+ years of experience in backend development.
• Strong proficiency in Python for backend applications.
• Good command of AWS, especially Lambda-based architectures.
• Solid knowledge of SQL, clean code principles, and OOP.
• Strong documentation and communication skills.
• Advanced English proficiency (spoken and written).

Responsabilidades

• Design and develop scalable, secure, and efficient backend solutions.
• Identify technical risks and propose architectural improvements.
• Deliver high-quality, tested code within timelines.
• Document technical standards and processes.
• Troubleshoot and resolve system issues.
• Manage and optimize cloud infrastructure resources.
• Collaborate cross-functionally to ensure smooth service integration.

Conocimientos

Python

AWS

SQL

Docker

Microservices

Event-driven systems

Documentation

Advanced English

Herramientas

Terraform

Serverless

FastAPI

Kafka

Clickhouse

Descripción del empleo

At Addyou, we are a recruitment consultancy specialized in identifying top talent for innovative and high-impact organizations. We are currently partnering with a fast-growing technology company based in Barcelona that is accelerating the energy transition through cutting-edge software and hardware solutions for utility-scale energy storage.

Are you passionate about working on tech projects with a real-world impact? Would you like to be part of a company with a strong vision, solid product, and a multidisciplinary team driven by innovation? If you're a Backend Engineer experienced in Python and excited by the challenge of scaling systems that power the renewable energy revolution, this role is for you.

What will you do?

As a Mid/Senior Backend Engineer – Python, you’ll be a key technical contributor responsible for designing, developing, and maintaining the backend architecture of a robust battery management platform. You’ll work in a collaborative environment alongside DevOps, Software, and Hardware Engineers, as well as Product Managers.

Your key responsibilities will include:

• Designing and developing scalable, secure, and efficient backend solutions for hardware/software integration.
• Identifying technical risks and proposing architectural improvements for scalability and performance.
• Delivering high-quality, tested code within agreed timelines.
• Documenting technical standards, data streaming processes, and analytics workflows.
• Proactively troubleshooting and resolving system issues to minimize operational impact.
• Managing and optimizing cloud infrastructure resources to ensure reliability and efficiency.
• Collaborating cross-functionally to ensure smooth service integration and system health.

What are we looking for?

• 4+ years of experience in backend development.
• Strong proficiency in Python for backend applications.
• Good command of AWS, especially Lambda-based architectures.
• Solid knowledge of SQL, clean code principles, and OOP.
• Experience with Docker, microservices, and event-driven systems.
• Strong documentation and communication skills.
• Advanced English proficiency (spoken and written).

Bonus points for:

• Experience with Infrastructure as Code tools such as Terraform.
• Experience with the Serverless and FastAPI frameworks.
• Knowledge of Kafka and analytical databases like Clickhouse.

What we offer

• Hybrid work model based in Barcelona.
• Full-time, permanent contract.
• Gross annual salary range: €50,000 – €55,000.
• A meaningful mission contributing to a more sustainable energy future.
• A high-performing technical team and a collaborative culture.
• A fast-moving environment where innovation and ownership are encouraged.

If you’re excited about building clean and scalable systems for the energy of the future, we’d love to hear from you.