Backend Developer

Avnet

Backend Developer at Avnet designing and building scalable services using Python and FastAPI. Collaborating on innovative projects in data platforms and AI/LLM integrations.

Posted 5/13/2026full-timeBarcelona • 🇪🇸 SpainMid-LevelSeniorWebsite

Tech Stack

Tools & technologies

ApacheCloudMicroservicesMongoDBNoSQLPythonSpark

About the role

Key responsibilities & impact

Design, develop, and maintain backend services using Python and FastAPI
Build scalable and high-performance APIs for internal applications
Work with NoSQL databases such as MongoDB
Design and optimize big data processing pipelines
Perform and optimize large-scale data transformations using Apache Spark on private cloud clusters
Collaborate with cross-functional teams (data, frontend, business)
Manage code versioning using GitHub
Contribute to modern software architecture design
Optimize system performance and reliability.

Requirements

What you’ll need

Strong proficiency in Python
Hands-on experience with FastAPI
Experience with NoSQL databases, especially MongoDB
Strong experience working with big data systems and large-scale datasets
Proven ability to optimize performance of data transformations, particularly using Apache Spark
Experience working with distributed computing environments (e.g. private cloud clusters)
Familiarity with version control systems (GitHub or similar)
Experience building RESTful APIs
Solid understanding of backend architectures and microservices
High proficiency in English (written and spoken).

Benefits

Comp & perks

Hybrid working model.
A supportive multicultural team environment where everyone is working toward the same goal.
A strong open-door policy.
An environment where you will have the tools and opportunities to further your career.
Meal Vouchers (Ticket Restaurant).
Private Medical Insurance.
LinkedIn Learning license.
And more…

ATS Keywords

✓ Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

PythonFastAPINoSQL databasesMongoDBApache Sparkbig data processingdata transformationsRESTful APIsbackend architecturesmicroservices

Soft Skills

collaborationcommunicationperformance optimizationproblem-solving