Back End Developer

Location: Barcelona (Sant Cugat del Vallès)

Seniority: Senior

Position: Senior Backend Engineer

About the job

We are hiring for an
AI-first SaaS platform
that leverages a network of
autonomous intelligent agents
to fully automate digital marketing operations for freelancers and small and medium-sized businesses. These AI-driven agents build and optimize websites and landing pages, manage advertising campaigns, publish content across social media channels, maintain Google Maps business profiles, and handle customer reviews.

As the platform continues to scale, the engineering team is being expanded to build
robust, scalable, and highly available backend systems
that form the backbone of a sophisticated AI-powered automation infrastructure.

About the Role

We are looking for a
Senior Backend Engineer (Python/Django)
to design, build, and evolve the backend services that power the platform. You will work on distributed systems, external integrations, and scalable architectures that support thousands of automated operations. This role plays a key part in defining engineering standards, raising technical quality across the team, and ensuring sustainable, secure growth of the product.

As a Senior Backend Engineer, you will:

Design and implement highly available and scalable backend services using
Python and Django

Build and evolve a distributed platform capable of handling complex, high-volume operations

Ensure architectures follow
clean code, SOLID principles, modularity, and maintainability

Integrate third-party APIs, external services, and internal systems with a strong focus on security and reliability

Strengthen observability through logging, metrics, monitoring, and alerting

Participate in peer code reviews, technical design sessions, and architectural decisions

Mentor junior engineers and help raise the overall engineering bar

Promote best practices in testing, documentation, security, CI/CD, and engineering culture

Collaborate within an Agile environment to deliver scalable, high-impact solutions

Required Skills & Tech Stack

We value strong technical judgment, ownership, and a collaborative mindset. Experience with the following is required:

6–7 years of experience building scalable, highly available applications

Strong expertise in
Python, Django, and REST API design

Solid knowledge of
SQL and NoSQL databases
(PostgreSQL highly valued)

Experience with
cloud platforms (AWS, GCP)

Hands-on experience with
Docker and Kubernetes

Strong problem-solving skills and analytical mindset

Excellent communication, collaboration, and technical leadership skills

Nice to have:

• Advanced observability practices
• Event-driven architectures or complex distributed systems
• Experience leading technical initiatives or architectural improvements

What We Offer

High-impact role with real autonomy and influence on key technical decisions

Competitive salary aligned with seniority, plus
team-based performance bonus

Stable full-time contract

Continuous professional development, training, and mentoring

Startup culture focused on ownership, results, and frequent feedback

Hybrid model in Sant Cugat

23 working days of vacation + birthday off

Intensive working hours every Friday

Flexible August schedule

Team-building activities, celebrations, and off-sites

Referral program

Flexible compensation via Coverflex

Employee discount portal

Significant discount on private health insurance

Office perks: meal tickets, snacks, fruit, and additional benefits

Ready to take on a challenge?

If you're ready to take on an exciting challenge and grow with a
disruptive AI-driven SaaS platform
, we want to hear from you