Principal Go Engineer

**Czym będziesz się zajmować?** **Requirements:** * **10+ yrs dev, 5+ yrs Go.** * **Role:** Tech Lead, Staff, or Principal Engineer. * **Core:** Ownership of high-availability, high-volume distributed systems. * **Go:** Advanced (concurrency, memory, profiling, optimization). * **Architecture:** Microservices, REST, distributed patterns (partitioning, idempotency). * **Data/Messaging:** Kafka (or similar), Advanced PostgreSQL. * **Infra:** Docker & Kubernetes (production). * **Skills:** Observability, troubleshooting, architectural decision-making. * **Language:** Fluent English. **Additional Advantages:** * **Scale:** Millions of events/sec, TB-scale, real-time data. * **Advanced Go:** Deep CPU/memory optimization. * **Tech Stack:** Druid, gRPC, Protobuf, Terraform, Helm, Ansible. * **Cloud & Monitoring:** AWS/GCP/Azure, Prometheus, OpenTelemetry. * **Security & Testing:** OAuth 2.0, TLS, Load/Stress testing. * **Domain:** Telecom, network analytics, open-source contributions. * **Leadership:** Strong hands-on skills mixed with mature architectural trade-off experience. **Kogo poszukujemy?** **About the role** Principal Go Engineer for a distributed data and analytics platform. You will code and take ownership of the architecture, performance, and key components. Requires hands-on experience with large production systems processing network data on Kubernetes, public cloud, and on-premises. * Designing scalable Go backend services and high-performance data pipelines. * Building Kafka-based event-driven architecture and defining data flows. * Making architectural decisions regarding scalability, consistency, and disaster recovery. * Optimizing Go at the CPU, memory, and concurrency levels. * Raising standards in code quality, security, and observability. * Leading cross-team technical initiatives and mentoring engineers. * Collaborating with DevOps/Product teams and resolving production incidents. **We offer:** * A distributed system you designed or significantly redesigned. * A scalability or performance problem you solved independently. * Systems handling massive volumes of events or data. * A complex technical initiative you led. * Two stages: tech interview with the client, followed by an end-client interview. * End-client meetings occur within ~72h, usually after 4:00 PM. * Employment requires a successful HireRight background and address check. * 100% remote working in European hours, available ASAP. **Czego wymagamy?** 10 lat doświadczenia na podobnym stanowisku Znajomości: * Grafana * Prometheus * Kubernetes * PostgreSQL * REST * Kafka * Concurrency * Distributed systems * Golang * Microservices * Performance optimization * System Architecture Mile widziane: * gRPC * OAuth Języki: * Polski * Angielski **Jakie warunki i benefity otrzymasz?** * 28k–33.6k PLN netto/m (B2B) * B2B - Elastyczne godziny pracy (100%) * Praca zdalna: Możliwa w całości **Kim jesteśmy?** Our client is an international technology company driving digital transformation for industry and business. As an IT integrator, the company delivers end-to-end services — from PLM implementations and data migrations to cloud platforms, IIoT, digital product engineering, advanced Data & AI analytics, and supply chain optimization. Working with global technology partners, it executes projects across sectors such as automotive, manufacturing and agricultural machinery, providing both off-the-shelf and bespoke systems plus organizational change support. Teams build Digital Thread, Digital Twin and sustainability-focused solutions, blending engineering practices with cloud and AI technologies. The company seeks candidates eager to grow in PLM, cloud, IIoT, Data & AI, systems implementation and automation — from junior to senior levels — in a fast‑paced, project-driven international environment.