Nuestro cliente
startup tecnológica europea especializada en inteligencia artificial aplicada a entornos físicos de alto tráfico, como centros comerciales, aeropuertos, destinos de ocio y cruceros.
We’re looking for a strongSenior BackEnd Engineer — someone who wants to design, build and own the entire backend and systems architecture of the company.
You'll own the backend, APIs, microservices, data flows, real time orchestration, and ML integrations end to end — ensuring performance, security, and scalability as we expand across international portfolios.
Requiriments
* 5+ years building backend systems at scale
* Strong expertise in Python (FastAPI or Django), SQL (Postgres/MySQL), and REST/GraphQL APIs
* Experience with microservices and Cloud Run (Kubernetes, Pub/Sub, queues)
* Strong in schema design, migrations, indexing, performance tuning
* Experience integrating external APIs (OAuth, webhooks)
* Familiarity with LLM integrations, retrieval pipelines, or vector DBs (Qdrant) is a plus
* Previously owned a backend/platform in a startup or led a technical project end-to-end
* Ability to act as tech lead when needed: drive decisions, review architecture, guide junior/mid engineers, push delivery
* Bias for simple, reliable, resilient systems
* Autonomous, fast, and comfortable in messy zero-to-one environments
* Clear communicator, proactive, opinionated, and hands-on
Valued
* Knowledge of Typescript, Javascript, React (not required but appreciated)
Esta es una posición de fundación, no un rol de mantenimiento. Se ofrecerá una compensación en phantom-share que refleja la visión a largo plazo.
Que ofrecen?
* Súmate a un proyecto startup con alto potencial de desarrollo y escalabilidad
* Oportunidades únicas de crecer y desarrollarte en una empresa en pleno crecimiento
* Aprende e innova en un ambiente súper vibrante de startup
* Modalidad híbrida (50% en remoto y 50% en oficinas de Barcelona)
* Contrato indefinido
* 45-60k euros brutos/año en función de experiencia contrastada
Main Functions
* Backend microservices end to end
* Build scalable APIs, workers, queues, and real time systems on GCP + Cloud Run + Cloud SQL
* Implement integrations with CRMs, CMSs, booking systems, loyalty platforms, and external APIs
* Develop backend support for AI agents: retrieval APIs, embeddings, vector DB, inference services
* Build and maintain event pipelines for analytics, ML, and product insights
* Ensure system security, observability, monitoring, logging, and CI/CD best practices
* Collaborate with Product AI teams to define technical architecture and implement new features quickly
* Own migrations, deployments, environments, CI/CD, and platform reliability
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