Backend Developer

We re looking for a motivated Backend Developer to join our UGC Platform Team in Barcelona.

Flowbox was founded in 2016 and is a fast-growing tech scale-up with large ambitions and broad visions. We provide a SaaS platform that helps brands improve their marketing, social media and e-commerce strategies. Our technology helps our clients to better collect, manage, and distribute their own customers  content, aka user generated content (UGC).

Earlier this year, Flowbox acquired the Danish company Dreaminfluence, a leading influencer marketing platform. Post-acquisition, Flowbox now serves more than 1,000 customers, reports close to €9M in ARR, and employs over 70 people across offices in Stockholm, Barcelona, Amsterdam, and Copenhagen.

We work with a modern, cloud-native stack built for scalability and performance:

• Languages & Frameworks:
  Python (Flask, FastAPI), Celery
• Databases & Storage:
  Postgre
  
  SQL, Dynamo
  
  DB, Amazon S3
• Infrastructure & Cloud: AWS (Lambda, Cloud Watch, Kinesis, Athena, EKS), Docker, Kubernetes
• Architecture & Tooling:
  Microservices, Event-driven systems, Git Hub Actions for CI/CD, New Relic

Our Tech Department is made up of two core teams:

• The UGC Platform Team (Barcelona): Responsible for the heart of our UGC platform, including integrations, back-office tools, content collection, moderation, and distribution. We also manage event streams, analytics, and data infrastructure, ensuring our systems are efficient, reliable, and scalable
• The Influencer Platform Team (Copenhagen): The team behind the influencer marketing part of the Flowbox platform, developing and maintaining a platform for influencer collaboration, campaign management, and performance tracking. We handle everything from influencer payments and reporting to analytics and insights, making it simple for brands and influencers to connect, collaborate, and generate results.

We work cross-functionally in a hybrid environment, collaborating across disciplines to deliver impactful solutions. In this team, you’ll find a balance of challenge, creativity, and ownership, with plenty of opportunities to make a real impact on Flowbox’s core product.

We believe in pair programming, regular code reviews, and open feedback, helping each other grow while maintaining high-quality standards across everything we build.

As a UGC Platform Backend Developer at Flowbox, you’ll play a vital role in shaping the core infrastructure that powers our product, a platform used by hundreds of leading brands around the world.

You’ll be part of an autonomous, cross-functional, agile team that designs, builds, and maintains backend services that are highly available, low-latency, and scalable. Your work will directly impact how we collect, process, and deliver user-generated content at scale.

In this role, you will:

• Design and develop robust APIs, microservices, and backend systems that power our UGC platform.
• Collaborate closely with engineers, product managers, and designers to bring new features to life and improve existing functionality.
• Investigate and resolve production issues across multiple services, ensuring reliability, scalability, and performance.
• Contribute to architectural decisions, infrastructure improvements, and process enhancements to help our platform grow efficiently.
• Work with a modern tech stack including Python, Docker, AWS (S3, Athena, Lambdas), Kubernetes, Postgre
  
  SQL, and Dynamo
  
  DB.
• Participate actively in Sprint Planning, Daily Standups, Product Reviews, and Retrospectives, continuously improving how we build, deliver, and learn together.

You re a backend developer with 3-4+ years of hands-on experience building reliable, scalable systems. You have strong, practical experience with Python, and you take pride in writing clean, maintainable code that powers products millions of users rely on every day.

You re comfortable working with Celery, Flask, Docker, Postgre

SQL, and Kubernetes, and you understand how to design and maintain microservice architectures. You have hands-on experience with AWS services like Cloud Watch, Kinesis, EKS, Lambdas and Dynamo

DB, and you re confident in navigating modern…