Applicative Systems Group · Chicago, IL / Braunschweig, DE
High-Assurance NixOS
for Embedded &
Cloud-Native Systems.
Applicative Systems Group is a trans-atlantic consulting firm engineering mission-critical, air-gapped, and supply-chain-hardened infrastructure on Linux and NixOS — from embedded device images with OTA updates to sovereign cloud-native stacks.
What senior engineers deliver
Four capabilities for high-assurance Linux and NixOS.
NixOS + systemd embedded images
Small, reproducible root images with signed over-the-air updates and atomic A/B rollback, ready for fleet deployment in the field.
- NixOS
- systemd
- OTA
- A/B rollback
Hardened supply chains for air-gapped systems
Lock down the build-to-deploy path for mission-critical environments with reproducible artifacts, verified dependencies, and full provenance.
- Air-gapped
- SBOM
- Reproducible
- Provenance
Declarative environments and hermetic CI
Unify dev, CI, and production on one declarative toolchain so builds are hermetic, cache-shared, and identical from a laptop to a release pipeline.
- Nix flakes
- Hermetic CI
- Dev shells
- Binary cache
Open-source stacks you can audit and export
Own every layer on open standards. No proprietary runtimes, no vendor lock-in, and full source-to-artifact traceability your team can inspect.
- Open Source
- No lock-in
- Auditable
- Portable
Trusted by Partners & Clients
Contact · Chicago, IL / Braunschweig, DE
Your first reply comes from a senior engineer, not a sales rep.
Every inbound reaches the engineers who ship the work. No qualifying call, no account manager between you and the people who would run your project.
Your message, or your booking notes, lands with a senior engineer who reviews technical fit.
The first call runs with the engineers who would deliver the engagement.
You get a written follow-up outlining scope, constraints, and next steps.
Send us the system, the constraints, the deadline, or book a 30-minute slot directly. Either way you reach the engineering team.
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