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.

Tech Stack

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

• Languages & Frameworks: Python (Flask, FastAPI), Celery

• Databases & Storage: PostgreSQL, DynamoDB, Amazon S3

• Infrastructure & Cloud: AWS (Lambda, CloudWatch, Kinesis, Athena, EKS), Docker, Kubernetes

• Architecture & Tooling: Microservices, Event-driven systems, GitHub Actions for CI/CD, NewRelic

About The Team

• 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.

Your mission

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.