Software engineering
Software that makes system behaviour visible and manageable.
Web and mobile interfaces, APIs, data pipelines, integrations and operational platforms.We build real systems.
We bring software, cybersecurity, embedded systems, R&D, machinery health and IoT/telematics into one engineering practice.
REI / 06
Projects and collaborations.
Selected marks from our products and collaborations across software, telematics, machinery and AI.
One system. Six engineering disciplines.
Not disconnected services: one end-to-end practice spanning hardware, security, software and field data.
01 / 04
Conceptual system visualisation · not a product presentation
Physical system
We understand the machine, environment and field constraints.
Embedded control
We design the sensor, PCB and firmware as one layer.
Secure connection
We define trust boundaries from source to platform.
Software and data
We turn raw data into a legible, observable system.
Test and iteration
We measure the prototype and feed evidence back into design.
01
Software engineering
Software that makes system behaviour visible and manageable.
Web and mobile interfaces, APIs, data pipelines, integrations and operational platforms.
Explore
02
Cybersecurity
Security is a design input, not an add-on.
Secure device communication, data flows, access boundaries, updates and operational architecture.
Explore03
Embedded systems
Hardware and software designed together for field conditions.
PCB, sensor interfaces, acquisition, communications and embedded software.
Explore04
R&D and prototyping
We turn uncertain technical questions into measurable experiments.
Proofs of concept, rapid prototypes, test fixtures, low-volume production and iteration.
ExploreEngineering with a field context.
Machinery health and IoT/telematics are two primary applications where our hardware and software layers meet real operating conditions.
Machinery health
From measurement to interpretation for rotating and critical equipment.
Vibration analysis, condition monitoring, balancing and evaluation of fault indicators.
ExploreRootcastle Media / Machinery
Increasing amplitude changes the simulated waveform peak.
This example shows one simulated vibration trace in the time domain. It is not a field measurement or a product performance claim.
IoT and telematics
From field device to dependable operational data.
GPS/GNSS, sensor systems, connected devices, secure transport and remote monitoring.
ExploreRootcastle Media / GPS
DeviceSecure linkSoftwareOperation
REI / LAB
We turn research into working systems.
From open-source instruments to private product cores: a project portfolio spanning signal processing, security, telematics, AI and physical systems.
REI SignalLab
A high-performance spectral analysis workspace that turns raw signals into measurable engineering decisions.
- DSP
- SIGNAL
- INSTRUMENTATION
REI Pentest Box
A white-box application security platform unifying code, API and deployment surfaces in one audit flow.
- APPSEC
- SAST
- SARIF
Sofia AI
Industrial AI research that interprets sensor and time-series data together with its physical context.
- EDGE AI
- MACHINE HEALTH
- RESEARCH
REI Drone
A modular VTOL research and simulation stack spanning aerodynamic models and flight control.
- VTOL
- 6-DOF
- CONTROL
REI Map
A local-first observability tool that makes network connections visible without moving data off-device.
- NETWORK
- LOCAL-FIRST
- SECURITY
Machinery Health Explorer
A product core unifying measurement, condition monitoring and vibration diagnostics for machinery health.
- VIBRATION
- DIAGNOSTICS
- INDUSTRIAL
Telemetry Core
A distributed data core that turns high-volume GPS telemetry into reliable, observable operational flows.
- GPS
- DATA PIPELINE
- RESILIENCE
PUBLIC REPOSITORY CONSTELLATION
Not a code dump. A living engineering atlas.
Selected public work—from flight dynamics and signal processing to embedded security, telematics, mathematical simulation and AI tooling—in one navigable index.
Explore 74 selected public repositories74 PUBLIC · 51 ORIGINAL · 23 FORKS
Forks are listed with their upstream provenance clearly identified.
sofia-ai
Industrial AI research for sensor intelligence, time-series reasoning and machine-health systems.
rei-skills
A broad catalogue of reusable agentic skills for modern coding and research assistants.
rootcastleco
The public profile and identity repository for Rootcastle Engineering & Innovation.
fly-brain
An experimental Python research workspace exploring autonomous flight intelligence.
reieco
Reforestation intelligence for exploring which species can thrive in a selected area.
rei-drone
A modular VTOL tilt-rotor research stack spanning 6-DOF simulation, aerodynamics and flight control.
mukavemet
A Java-based engineering study in strength of materials and structural reasoning.
noble-rei
An experimental Python laboratory in the Rootcastle public research archive.
rootcastle-poker
A TypeScript product experiment focused on game systems and interactive decision logic.
Rotor-Dynamics-Simulator
A browser-based engineering simulator for aerodynamic velocity and structural loads in two-bladed rotors.
rei-signallab
A high-performance digital signal processing and spectral instrumentation suite.
mini-logic-engine
A compact Prolog-like Common Lisp engine with facts, rules, unification and backtracking search.
Apple-style-guide-skill
A design-first interface review skill grounded in Apple HIG principles with an optional REI brand layer.
rootcastle-energy-scada
A Python research platform for energy telemetry, operational visibility and SCADA-oriented workflows.
rei-pentest-box
A white-box security and code-audit platform for SAST, SARIF and API vulnerability assessment.
reimap
A local-first network observability tool that maps live connections without sending traffic data away.
MICR-E-13B-Glyph-and-Signal-Terminal
A Python laboratory for MICR glyphs, signals and machine-readable visual instrumentation.
Counterfactual-Telemetry-Oracle
An experimental telemetry research environment for counterfactual analysis and operational reasoning.
-REI-network-analyzer
A Windows network telemetry, host discovery, port analysis and security-operations dashboard.
NanoPhotonic-GNSS-Emulation
A stochastic GNSS receiver emulation framework for chip-scale optical-clock research.
production-grade-minimal-C-compiler
A compact compiler pipeline translating a restricted C subset into deterministic x86-64 assembly.
wifi-locator
A web and Android indoor-positioning system that estimates location from Wi-Fi signal strength.
MIL-STD-498-skills
A public collection of reusable engineering skills structured around MIL-STD-498 practices.
medical-research-skills
An upstream library of agent skills for medical research workflows and evidence work.
home-watcher
A hardened, local-first NVR surveillance and AI-alert appliance stack for self-hosted servers.
rootcastle-linear-system-lab
A mobile-first differential-equation laboratory with eigenanalysis and state-space visualization.
eng-practices
An upstream reference archive of Google engineering-practice documentation.
agency-agents
An upstream collection of specialized AI-agent roles, workflows and delivery patterns.
SatElite
An upstream satellite-viewing project based on NASA WebWorldWind.
Hydro-rei
An upstream secure IoT hydroponics system using ESP32 telemetry and real-time dashboards.
Jt-808-parser-MIL-STD-498
A Python protocol-engineering workspace for JT/T 808 parsing and specification-led development.
PLFM_RADAR
An upstream open-source reference for a low-cost 10.5 GHz phased-array radar system.
GPS-Tracker-pcb
An upstream STM32 and SIM808 GPS-tracker board reference with MQTT and encrypted communications.
claude-code-haha
An upstream reference fork retained for research and interoperability review.
agentscope
An upstream framework for building observable and inspectable agent systems.
JT808-all
An upstream C# implementation of JT/T 808 and GB 808 protocol generations.
jt808-parser
A browser-oriented laboratory for inspecting and understanding JT/T 808 messages.
jt808-python-parser
A Python parsing workspace for JT/T 808 telematics frames.
seker-takip
A Turkish, offline and advertisement-free blood-glucose tracking application.
Multiverse.jl
A Julia simulation engine for hierarchical universe systems inspired by effective-field-theory models.
rtc
A shell-based systems workspace in the Rootcastle public engineering archive.
raspberry-server
A shell automation workspace for compact Raspberry Pi server deployments.
openhaystack
An upstream framework for experimenting with personal Bluetooth-device tracking networks.
Quantum-Circuit-Simulator
A browser-based experimental environment for visual quantum-circuit simulation.
cryptography
An upstream Android reference collection covering cryptographic application examples.
Rootcastle-Network-Monitor
A Windows network-monitoring and security-analysis dashboard with traffic telemetry and host discovery.
random-password-generator
A cryptographically strong command-line password generator with configurable character policies.
pathfinding-algorithm
An interactive visualization of A* pathfinding and graph-search behaviour.
iot-sicaklik-izleme
A Python IoT workspace for collecting and monitoring temperature telemetry.
awesome-ai-system-prompts
An upstream reference collection of system prompts for AI tools and agent builders.
Mobius-Strip-Calculator
A compact numerical tool for computing and exploring the Möbius strip parametric surface.
GPS-Tracker
An upstream multi-device GPS-tracking platform reference covering widely used tracker families.
parser
A Python protocol-parsing experiment in the Rootcastle telematics archive.
python-trackimo
An upstream Python integration for accessing Trackimo location data.
clerk
An AI-assisted message composition tool that adapts one draft for multiple communication channels.
Leaflet
An upstream reference fork of the mobile-friendly interactive mapping library.
EchoTrace
A system-observability experiment that turns CPU, network, sensor and timing behaviour into sound signatures.
Tron-Shell
A unified firmware-flashing CLI with USB discovery, bootloader workflows and multi-platform support.
OBD-Diagnostics-Engine
A TypeScript engine for vehicle OBD data and diagnostic workflows.
gt06
An upstream reference implementation for parsing GT06 GPS-tracker messages.
audio-visualizer
A browser experiment for translating audio energy into responsive visual form.
sossignalsent
A TypeScript prototype for structured SOS signalling and event delivery.
kimyaistatistik
A TypeScript study connecting chemistry-oriented datasets with statistical analysis.
Etanol-D-n-t-r-c-w-w-v-v
A browser-based technical experiment in the Rootcastle public laboratory archive.
net-bot
A PHP-based network automation experiment.
netcore
A public systems workspace for network and service-core experiments.
R36S_Stock_DTB
An upstream hardware-reference archive preserving stock device-tree files for R36S systems.
ArticleSummarizer
A Python experiment for extracting and condensing the structure of long-form articles.
turkce-haiku-olusturucu
A compact Python generator exploring the rhythm and constraints of Turkish haiku.
Rplidar
An upstream Python reference for working with RPLIDAR sensors.
Opencv-pixel-de-erleri
A compact computer-vision example for inspecting image data at pixel level.
COVID19-Lab-Results
An upstream parser reference for structured respiratory-virus laboratory results.
hackingtool
An upstream security-tool reference retained for defensive research and controlled laboratory review.
USB-Rubber-Ducky
An upstream embedded-security reference for USB HID research in controlled environments.
Engineering Notes
Field questions, measurement methods and design decisions explained in direct technical language.
Where does secure device communication begin?
Trust in an IoT device depends on identity, key lifecycle, message validation and a maintainable update process.
Measurable requirements for embedded systems
“Low power” and “fast response” become useful requirements only when operating conditions and acceptance criteria are explicit.
From vibration data to a useful signal
Sampling, sensor mounting, windowing and operating conditions must be considered together before interpreting an FFT plot.