CareerPlan

Senior Staff Software Engineer

Kraków, PolandFull-time2026-10-06 → 2026-10-30
Hybrid · Poland

Core

Senior Staff Software Engineer owning the full data ingress and egress pipeline for a real-time IoT platform processing billions of BLE events daily in healthcare.

Role type

Senior Staff Software Engineer (Backend/Platform)

Builds

High-scale, event-driven data pipelines connecting third-party location devices to downstream systems via Kafka, REST, gRPC, and WebSocket.

Domain

Healthcare IoT / Real-time Telemetry / Cloud-Native Distributed Systems

Required skills

Java (Spring Boot/Kotlin), Apache Kafka (Streams/Topology), AWS (EKS/Kinesis/Terraform), Database design (MongoDB/PostgreSQL/Redis), gRPC, REST, WebSocket, CI/CD, Observability (Prometheus/Grafana), Testcontainers, AI-assisted development

Preferred skills

IoT/BLE telemetry, Go/Python, AsyncAPI, Drools, OAuth2/Keycloak, Series B/C product company experience

Technologies

Kafka, Spring Boot, Kafka Streams, AWS EKS, Terraform, Helm, Prometheus, Grafana, Jenkins, GitHub Actions, MongoDB, PostgreSQL, Redis, gRPC, WebSocket, Testcontainers

Responsibilities

Design and maintain high-volume data ingress integrations with third-party location platforms; Build and evolve egress pipelines streaming enriched data to external APIs; Drive architectural evolution and establish engineering standards; Collaborate with stakeholders to translate business requirements into technical decisions; Mentor engineers through code reviews and design sessions.

Seniority

Senior Staff, hands-on IC with strategic ownership