Senior Software Engineer – Backend

Senior Software Engineer – Backend

Randstad España
Randstad España
Viladecans, SpainOn-site€40,000 - €55,000Added 8 days agoSenior · 7+ yearsPermanent🇪🇸Spanish: Fluent

This job was originally posted in Spanish and automatically translated to English. You'll most likely need Spanish to apply.

About the role

Are you passionate about programming and interested in further developing your career as a Senior Backend Engineer leading Artificial Intelligence and LLM integration projects in complex production systems?

If your professional background is focused on backend development with Python, designing solid architectures, and you have interest/experience in bringing AI and Data Science capabilities to real production environments, we want to meet you!

What you'll do

What will your day-to-day look like?

  • Design, build, and operate scalable services and APIs in Python for applications with integrated AI.
  • Integrate Artificial Intelligence models, LLMs (Large Language Models), and Machine Learning services into production systems.
  • Define service boundaries, data models, persistence strategies, and integration contracts.
  • Design with a focus on reliability, security, observability, performance, and cost optimization.
  • Deploy and operate services in Cloud environments (preferably AWS).
  • Manage real AI challenges such as latency, rate limits, retries, structured responses, and sensitive data.
  • Lead technical discussions, perform code reviews, and tutor/mentor other engineers on the team.
  • Collaborate closely with Data Scientists, Product Managers, platform engineers, and architects.

What we're looking for

If you see yourself reflected here, we encourage you to take on this challenge. We are looking for professionals with solid experience in Backend development and good engineering practices:

  • Demonstrable experience in Backend software development (around 7+ years of experience or equivalent technical impact is valued).
  • Proficiency in Python and backend API/service design.
  • Strong architectural judgment in distributed systems, failure management, and relational database design / data modeling.
  • Experience operating services in Cloud environments (AWS preferably).
  • Good practices in clean code, testing, CI/CD, observability, and production support.
  • Practical knowledge of Docker and Kubernetes.
  • Awareness and good practices in security, privacy, and data protection.

Nice to have

It would also be interesting if you knew (Nice to have):

  • FastAPI, Terraform, Amazon EKS, PostgreSQL / Aurora.
  • Asynchronous processing and event-driven systems.
  • Real integration of AI and LLMs in production environments.

What you'll get

Your benefits: What are you waiting for to join our great Randstad Digital team? Here you will find reasons to do so:

CONTINUOUS TRAINING PLAN, annual training plan, access to an e-learning platform for technical training, skills training platform...

SUPPORT AND CAREER PLAN, You will have a Randstad Digital contact close to you at all times.

WORK-LIFE BALANCE, We know your personal life is as important as your professional one, so you can enjoy 23 vacation days and, in most of our projects, you will have flexible working hours.

COMMITMENT and STABILITY, Joining a continuously growing company that bets on new technologies.

COMPETITIVE SALARY in line with your professional experience.

Competitive contractual conditions, flexible compensation plan (restaurant card and childcare vouchers) and Randstad Care, a platform with exclusive offers and discounts.

REFER-A-FRIEND PLAN, if you help us grow the team, we will reward you with a financial bonus.

EUR 40,000–55,000 per year

How you'll work

full-time

permanent

hybrid

About the company & team

Data & insights

Additional information

Confidentiality is guaranteed throughout the selection process.

Are you eager and ready to take on a new challenge like ours?

We are waiting for you! https://www.youtube.com/watch?v=JJVLc3JtdsA

#somosRSC

Randstad promotes equal employment opportunities through diverse and inclusive teams. Therefore, in our processes, we guarantee the inclusion of all people regardless of their personal condition, gender, sexual orientation, ethnicity, culture, age, religion, or disability.

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