Senior Backend Engineer
2 days ago
Valencia
Hi there! Cualquier información adicional que necesite para este trabajo se encuentra en el texto a continuación. Asegúrese de leerla detenidamente y luego envíe su solicitud. At Flipflow , we're looking for a Senior Backend Engineer to join our core engineering team and help us build and scale one of the most ambitious Retail Intelligence platforms in the market. This is a deep technical role , for people who genuinely enjoy building software , thinking about architecture, and getting involved not only in code but also in product and business decisions . If you're excited about complex backend systems, massive-scale data processing, crawling infrastructure and making data flow reliably from collection to client — this role is for you. About Flipflow & Our Mission Flipflow is a Retail Market Intelligence & Digital Shelf Analytics SaaS platform , currently scaling internationally after strong growth in Spain and Latin America. Since our launch in 2021, our mission has been clear: To give brands, manufacturers and retailers a real-time, actionable and reliable cockpit and AI copilot to understand their products, competitors and markets — enabling better business decisions. Retail is facing one of the biggest transformations in its history: markets are global, competition is intense, and margins depend on data quality, speed and intelligence . At Flipflow, we believe real-time competitive intelligence is no longer optional — it's essential. Your Challenge & Impact At Flipflow, every new backend feature is an adventure and a project on its own — most of them genuinely fun if you like hard problems. We crawl over a billion datapoints per week , process and normalize massive volumes of messy retail data, and turn that into structured intelligence used by global brands. As a Senior Backend Engineer , your mission is to design, build and evolve the systems that: • Collect and process massive volumes of raw data with our own crawling infrastructure, • Normalize, relate and enrich millions of products across markets with complex data pipelines, • Power our proprietary BI suite, analytics and AI-driven insights using LLMs and Agents, • Scale reliably as customers, use cases and data volumes grow You will have a direct impact on product quality, system scalability, data intelligence and Flipflow's long-term technical foundation . What will you do? • Design, build and maintain core backend services and APIs — PHP/Laravel as the main framework, with TypeScript, Python and Go across different services., • Build and operate large-scale data pipelines — ingest data from hundreds of crawled sources, transform and normalize it, and deliver it reliably to our OLAP engine so clients see fresh, accurate data every day., • Contribute to and improve our distributed crawling infrastructure — tens of millions of daily requests, thousands of parallel browsers, proxy management, session handling and anti-detection systems, all built in-house., • Work on event-driven and streaming systems — message queues, async processing, real-time data flows. You'll ensure data moves efficiently from collection to delivery at scale., • Jump between codebases, languages and layers as needed — from Terraform to TypeScript to PHP to Go. If something is broken or needs building, you own it regardless of where it lives. Your Profile • 5+ years of experience in Backend, Full-stack or Data Engineering roles., • Data pipeline engineering — you've built systems that ingest, transform and deliver large volumes of data reliably. Not analytics or dashboards — the plumbing that makes data flow from source to client., • Event-driven architecture — message queues (Pub/Sub, SQS, Kafka), async job processing, streaming. You've built systems where millions of events flow through multiple stages without losing data., • Comfortable across the full stack — you don't need permission to jump into a new codebase, language or layer. If it's broken, you fix it. If it needs building, you build it. Nice to Have • Stream processing (Apache Flink, Kafka Streams) — building and operating real-time data flows, not just consuming them., • Web scraping at scale — distributed crawling, browser automation, proxy management. You've dealt with the chaos of collecting data from hundreds of sources., • Kubernetes + IaC (Terraform/OpenTofu) — you can own the deployment, not just the code. Helm, ArgoCD, GCP/AWS., • OLAP / time-series databases — ingestion, partitioning, performance tuning for analytical workloads. xcskxlj What We Offer • Compensation: Competitive senior-level salary aligned with experience and impact, • Real ownership: You will shape core systems, not just implement tickets, • Hard technical problems: Massive data, AI in production and complex distributed systems, • Flipflow culture: High standards, autonomy, trust and frequent feedback, • Flexibility: Hybrid model (2 days remote / 3 onsite), • Location: Offices in La Marina, Valencia, with wonderful views of the sea Our Commitment At Flipflow, senior engineers are builders and decision-makers , not just executors. We offer: • Ownership over meaningful technical problems, • Space to design, refactor and improve core systems, • Real-world AI and data challenges, • A strong, ambitious team building something that genuinely matters, • If you want to build the systems that move data at scale , and be part of a company aiming to define a new standard in Retail Intelligence, we'd love to meet you.