Principal Backend Engineer page is loaded## Principal Backend Engineerlocations: Spain - Barcelonatime type: Full timeposted on: Posted Todaytime left to apply: End Date: January 12, **** (30+ days left to apply)job requisition id: ********## **JOB DESCRIPTION:****ABOUT LINGO** Lingo is building a cutting-edge digital health platform that fuses continuous biosensor data, high-performance backend engineering, and advanced analytics to help people live healthier, longer, fuller lives.
Our systems process massive volumes of real-time data, and the backend is the heartbeat of the platform.
**THE OPPORTUNITY** Lead the architecture and delivery of scalable, cloud-native backend services that power Lingo's real-time biosensor platform processing massive volumes of data.
You'll drive system reliability, performance, and security across multi-region deployments, enabling general scale and trusted experiences for customers and partners.
Our platform processes large volumes of real-time data for IoT-scale ingestion and analytics, with services deployed across Kubernetes and integrated streaming systems to support millions of biomarkers readings daily across regions.
**WHAT YOU'LL DO*** Architect and build high-performance microservices for IoT-scale ingestion and real-time analytics, design robust APIs and data processing pipelines.
* Design and evolve multi-region, cloud-native services on Kubernetes with service mesh for reliability, security, and traffic management* Apply best practices in REST and event-driven API design, integrate high-throughput messaging (Kafka/RabbitMQ) for real-time transport* Ensure end-to-end security and data protection in backend services, meeting compliance requirements in regulated environments* Optimize for low latency and high availability: caching, backpressure, idempotency, resiliency patterns, and performance tuning* Define reliability and performance objectives, partner with SRE/DevOps on observability, incident response, and capacity planning* Establish API versioning, schema evolution, and data contract practices to ensure backward/forward compatibility across teams* Collaborate closely with Mobile/Web, Data/ML, and Platform to align backend capabilities to product goals and AI/analytics use cases* Participate on architecture reviews, **mentor engineers**, and foster technical excellence and a culture of measurable outcomes**REQUIRED QUALIFICATIONS*** 8+ years of backend engineering with a strong focus on distributed systems and microservices, deep expertise in Java/Spring Boot and/or Kotlin, with relational and NoSQL databases* Proven experience with cloud-native architectures, Kubernetes, and service mesh technologies in production* Strong knowledge of API design (REST, event-driven) and real-time messaging/streaming (Kafka, RabbitMQ)* History of delivering high-availability, low-latency systems in production environments.
* Demonstrated security and privacy-by-design mindset, experience meeting compliance standards in regulated contexts* Effective technical leadership: leading discussions, mentoring, and influencing cross-functional stakeholders**PREFERRED QUALIFICATIONS*** Experience with GraphQL, gRPC, familiarity with schema evolution and consumer-driven contracts like a schema registry-based contract* Expertise tuning data stores (e.g. Postgres, Cassandra) and caches for high-throughput workloads* Multi-region design patterns, traffic shaping, and failover on Kubernetes/service meshes* Observability at scale (OpenTelemetry, tracing-driven debugging), API gateways, and rate limiting* Experience supporting AI/ML-serving interfaces and streaming feature inference paths**LINGO CULTURE** Customer-first, quality-driven, growth-minded, and united.
You'll set a high bar for reliability and developer experience so teams can ship fast and safely while protecting user trust.
**The base pay for this position is**N/AIn specific locations, the pay range may vary from the range posted.
## **JOB FAMILY:**Product Development## **DIVISION:**LNGO Lingo## **LOCATION:**Spain > Barcelona : Av.
Diagonal, 601## **ADDITIONAL LOCATIONS:**## **WORK SHIFT:**Standard## **TRAVEL:**Not specified## **MEDICAL SURVEILLANCE:**Not Applicable## **SIGNIFICANT WORK ACTIVITIES:**Not Applicablelocations: Spain - Barcelonatime type: Full timeposted on: Posted 30+ Days Ago
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