About Kontakt.io [Upgrade to PRO to see link]
Kontakt.io [Upgrade to PRO to see link] is building the platform that care operations run on.
We reduce waste, cut costs, and improve throughput in hospitals by automating and orchestrating clinical workflows. Using AI, real-time location data (RTLS), and deep EHR integration, our platform enables care teams to operate with real-time intelligence and financial discipline.
Trusted by leading U.S. health systems including HCA, Sutter Health, AdventHealth, Trinity Health, and the U.S. Department of Veterans Affairs β and backed by Goldman Sachs β we are scaling rapidly toward the next phase of durable, disciplined hypergrowth.
Kontakt.io [Upgrade to PRO to see link] is the leading IoT platform for real-time location and telemetry in healthcare and enterprise. Our systems track hundreds of thousands of assets and people across hospitals and campuses globally β processing billions of BLE events daily through a Kafka-first, cloud-native architecture.
The team is the connective tissue of this platform. We own the full data ingress pipeline β from third-party devices (Cisco, Aruba, and beyond) to our internal Kafka backbone β and we own egress: streaming enriched location and telemetry data out to downstream systems, external APIs, and partner platforms. We are rebuilding this domain the right way: event-driven, observable, documented, and built to scale.
We need a technical anchor β someone senior enough to raise the bar, pragmatic enough to ship, and confident enough to drive alignment across engineering and product.
What you will work on:
Data ingress & device integration
Own the pipeline that brings external device data into the Kontakt.io [Upgrade to PRO to see link] platform. Build and maintain robust integrations with Cisco Spaces, Aruba, and similar third-party infrastructure. High-volume BLE telemetry, Kafka Streams, gRPC β multi-tenant SaaS where both correctness and latency matter.
Data egress & external integrations
Build and evolve the egress layer that streams enriched location and event data to partner systems and customer-facing APIs β real-time position feeds, alarm forwarding, standards-compliant adapters. You own how the outside world consumes Kontakt.io [Upgrade to PRO to see link] data.
Architecture & technical leadership
You will drive the architectural evolution: what to rewrite, what to stabilize, and how to sequence it without breaking production. You establish the engineering standards β documentation, testing with Testcontainers, observability with Prometheus/Grafana β and you hold the team to them.
Cross-team ownership
Work directly with product stakeholders to translate business requirements into engineering decisions. When scope is unclear, you clarify it. When dependencies block the team, you resolve them.
Day-to-day Reponsibilities:
- Design, build, and maintain Java/Spring and Kafka Streams-based services processing real-time BLE and IoT telemetry at scale
- Own ingress integrations with third-party location platforms β from protocol understanding to production reliability
- Build egress pipelines streaming location and event data to downstream systems via REST, gRPC, and WebSocket
- Drive architectural decisions and document them β the team currently operates on verbal agreements; you will change that
- Use AI tools as a core part of your development workflow: code generation, debugging, documentation, prototype acceleration
- Define and enforce testing standards using Testcontainers and CI pipelines (Jenkins, GitHub Actions)
- Instrument services with Prometheus and Micrometer; build Grafana dashboards that give the team real operational visibility
- Collaborate with Data Platform and SRE teams on Kafka topology, state store configuration, and infrastructure ownership
- Mentor engineers on the team β through code reviews, design sessions, and honest feedback
What we are looking for:
- 7+ years of backend software engineering, with strong production Java experience β Spring Boot and ideally Kotlin too
- Deep, hands-on Apache Kafka knowledge: Streams, state stores, topology design, and operational behavior β not just produce/consume
- Experience building real-time, event-driven distributed systems in multi-tenant SaaS environments
- Solid database fluency: MongoDB, PostgreSQL, Redis β you know when to use what and why
- Hands-on AWS experience: EKS, Kinesis, S3; comfortable reading and writing Terraform and Helm
- Track record of taking ownership of a messy, under-documented domain and making it better
- Ability to work directly with product and business stakeholders β you can translate between engineering and everything else
- Clear written and verbal English; the team is international
- Based in or willing to relocate to KrakΓ³w, Poland
Nice to have:
- Experience with IoT or BLE telemetry systems
- Go or Python for tooling and automation
- Familiarity with AsyncAPI, Drools rules engine, or OAuth2/Keycloak
- Background in a high-growth Series B/C product company
The kind of Engineer we are hiring:
You should be comfortable with ambiguity, allergic to sloppiness, and capable of holding a high bar while still shipping. If you think AI tools are optional extras rather than a core part of how modern engineers work, this is not the right role.
We Offer:
Competitive salary reflecting staff-level seniority β we benchmark against market
Equity in a Series C company with a clear growth trajectory
Private healthcare, Multisport card, and standard benefits package
Hybrid from KrakΓ³w office - at least 2 days in the office
A real technical challenge β not a maintenance role on a stable codebase
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