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About the Role

As a Staff Software Engineer, you will directly impact the technical direction of our orchestration products, Hydris and its underpinning interoperability API. You will work at the layer where heterogeneous real-world systems become a single coherent picture, solving problems in distributed systems, protocols, and data modeling within challenging environments. The role is hands-on and expects you to shape what and how we build.

Responsibilities

Design and build the core engine systems for Hydris using Go.
Own the architecture of systems running reliably on edge hardware, in disconnected mesh networks, and at scale.
Evolve the schema defining sensor, asset, and mission system communication with Hydris.
Make API design decisions for client libraries.
Refine the integration framework for connecting new sensor types, data sources, and command systems.
Set patterns for built-in integrations (ADS-B, AIS, ASTERIX, Meshtastic, SpaceTrack, TAK, federation).
Enable external developers and system vendors to build plugins/integrations for Hydris.
Architect the peer-to-peer mesh and federation layer for disconnected, intermittent, and limited-bandwidth environments.
Solve coordination problems like conflict resolution, eventual consistency, and track correlation.
Ensure graceful system degradation during connectivity loss.
Set technical standards for testing distributed behavior, protocol versioning, and backward compatibility.
Review code for long-term maintainability and operational correctness.
Make build-versus-integrate decisions and communicate trade-offs.

Requirements

Experience building and shipping distributed systems in production, especially where reliability is critical.
Comfort working across the stack, from Protobuf schema design and Go to TypeScript.
Well-formed views on API design and protocol evolution, based on experience maintaining APIs.
Ability to operate autonomously and collaborate effectively on technical decisions.
Interest in contributing to European military, maritime, and critical infrastructure defence systems.
Ability to write clearly and communicate architectural decisions effectively.
Must be eligible to work in Germany; visa sponsorship is not offered.

Skills

Go
Rust
TypeScript
Protobuf
API Design
Protocol Evolution
Distributed Systems
Mesh Architectures
Geospatial Systems
Sensor Fusion
Track Management
CoT/TAK
ASTERIX
SAPIENT
MIL-STD-2525
Networking
Contested/Degraded Communication Environments
Developer-facing Open-Source Infrastructure

Location

Remote (Germany)
Hybrid (Berlin)
Hybrid (Munich)
On-site (Berlin)
On-site (Munich)

Work Type

Remote
Hybrid
On-site
Full-time

Experience Level

Staff

Benefits

High degree of autonomy and ownership
Flat structure
Real input into technical direction
Annual €1500 Learning & development budget (after probation)
Bike Leasing
Urban Sports Club membership
30 days of paid time off

About the Company

Project Q GmbH is a Germany-based DefenseTech company with offices in Berlin and Munich.
We network market-available sensors, effectors, or situational awareness systems into a tactical IoT backbone.
Our solutions provide armed forces and security agencies with cross-domain information superiority – automated, scalable, and cost-efficient.
We build platform-agnostic systems enabling real interoperability across domains.
Q is a European defence-tech company pioneering the Internet of Defence with modular, scalable and interoperable sensor and intelligence solutions.