Technology company · R&D · Romania, EU · since 2015

We build what others only integrate.

Software, R&D and IoT — designed, prototyped in our own lab in Romania and taken into production. With AI agents at every step of engineering and people who own the result.

Book a 20-minute call See what we build
01 · Software

Platforms that carry the operational load.

Web, mobile, ERP/CRM, kiosk and payment integrations, AI agents working on your data.

  • Custom web & mobile applications
  • ERP / CRM and integrations
  • Agentic AI & automation
Software development
02 · R&D

From idea to a demonstrable prototype.

In-house lab: schematic, PCB, firmware, enclosure, testing. Small series once the PoC is validated.

  • Electronics & PCB
  • Embedded firmware
  • PoC in weeks, not months
Research & development
03 · IoT · own platform

Sensors, rules, actions. In real time.

  • Encrypted telemetry, 100+ device profiles
  • Zigbee · Z-Wave · LoRaWAN · Modbus · MQTT
  • Smart building & industrial automation
IoT systems
2015founded
9engineers, 6 in R&D
6funded digitalisation projects, 2025–2026
100+device profiles on our own platform
Common challenges

The problems we solve most often

We hear them from manufacturers, distributors, property developers and companies running funded digitalisation projects.

The situation

“We have an approved digitalisation project with hard deadlines and dense technical requirements (ERP, CRM, IoT, AI).”

What we do

We deliver the complete platform, with the equipment integrated and the acceptance documentation. We have done it for EU-funded projects with fixed deadlines.

The situation

“We need a device that does not exist on the market — or exists, but does not do exactly what we want.”

What we do

We design the electronics, write the firmware, make the enclosure and test it in our lab. You get a working prototype, then a small series.

The situation

“We have data from sensors and equipment, but we cannot see it or react to it.”

What we do

We connect your sensors to our IoT platform: real-time dashboard, automatic rules, alerts, history. No vendor lock-in.

The situation

“Our systems do not talk to each other; people copy data by hand.”

What we do

We integrate ERP, CRM, payments, kiosks and devices into one flow, with AI agents for classification, extraction and reports.

What we do

Three pillars, one engineering team

We do not subcontract hardware to one company and software to another. The same engineers design the sensor, the firmware, the cloud and the app.

01 · Software

Custom software development

Web and mobile platforms, ERP/CRM, integrations with kiosks, payments and equipment, AI agents. Delivered in sprints, tested, documented and handed over.

TypeScriptReactNodePythonPostgreSQLTimescaleDBDockerAWSClaude · OpenAI
Custom software development
  • Custom web & mobile applications
  • ERP / CRM and management modules
  • Integrations: payments, kiosks, equipment, third-party APIs
  • Agentic AI: classification, RAG, data extraction
  • Cloud, DevOps, monitoring
  • Modernising existing systems
02 · R&D

Research, development and hardware prototyping

In-house prototyping lab: electronics, PCB, firmware, enclosures, testing. Demonstrable PoC in weeks, then small series. Technical partner for innovation projects.

KiCadESP32STM32Raspberry PiZephyrFreeRTOSC / C++Rust3D print
Research & development
  • Feasibility studies and architecture
  • Schematic design and PCB layout
  • Embedded firmware (ESP32, STM32, Linux)
  • 3D-printed enclosures, mechanical integration
  • Functional, endurance and field tests
  • Manufacturing documentation and small series
03 · IoT

IoT engineering and connected systems

Sensors, gateways, telemetry and our own smart-building platform. Building and industrial automation, from prototype to production.

MQTTModbusLoRaWANZigbeeZ-WaveBLEOPC UAInfluxDB / TimescaleGrafana
IoT systems
  • Multi-protocol sensors and gateways
  • Stunner Core platform: dashboard, rules, alerts
  • Smart building & BMS light
  • Industrial automation (PLC, Modbus, SCADA light)
  • Encrypted telemetry, OTA, device fleets
  • Integration with ERP / BMS / existing systems

And, as secondary services

Robotics & autonomous systems

Control, vision, actuators, ROS 2, automation cells.

PropTech & smart building

Platforms for developers and building operators, BMS light.

IT consultancy & technical assessment

Architecture, stack selection, technical reports for digitalisation projects.

Security & infrastructure

Cloud, RBAC, telemetry encryption, backup, monitoring.

The lab

A prototyping lab, not just offices

This is where devices are born: from the schematic to the 3D-printed enclosure and the endurance test. The same place where we write the software that controls them.

01
Definition & feasibilityRequirements, constraints, architecture, component selection, estimate.
02
Schematic & PCBElectronics design, layout, breadboard/dev-kit prototype, PCB order.
03
Firmware & connectivityEmbedded (ESP32/STM32/Linux), protocols (MQTT, Modbus, LoRaWAN, Zigbee, BLE), OTA.
04
Mechanics & integration3D-printed enclosure, sensors, power, assembly and wiring.
05
Testing & validationFunctional, endurance and field tests; preparation for conformity assessment.
06
Small series & productionManufacturing documentation, suppliers, pilot assembly, transition to production.
Productised offer

Prototyping sprint

A fixed-scope engagement: you come in with an idea or a requirement, you leave with a demonstrable working prototype and a technical report you can use for a decision, for funding or for production.

  • Definition workshop (1 day) + technical plan
  • Working prototype: electronics + firmware + minimal software
  • Technical report, estimated BOM, next steps
Talk about your prototype
Lab workbench: laptop, breadboards, soldering tool and modules under test
Prototyping lab · workbench
Our own platform

Stunner Core: from sensor to decision

Our IoT platform, developed since 2019, runs in real buildings and installations. We use it as the base for smart-building and automation projects, so we never start from zero.

  • Rules that act — “If luminance drops below 200 lx after 18:00, switch circuit K1 on” — no code, with history.
  • Encrypted telemetry — Data encrypted in transit and at rest, roles and permissions, audit log.
  • No vendor lock-in — Standard protocols, data export, documented API. Your devices stay yours.
IoT systems
Devices & sensorsZigbee, Z-Wave, LoRaWAN, Modbus, IP — 100+ profiles supported.
edge
GatewayLocal collection, offline buffering, encryption, OTA updates.
hub
Cloud & rulesTime-series telemetry, rules engine (“Robots”), scenarios, alerts.
core
ApplicationsWeb dashboard, mobile app, API for ERP/BMS integrations.
app
Agentic AI, under control

AI agents working on real data, with people who own the outcome

We use AI agents in our own engineering workflow and ship them to clients as part of the product. With clear rules about what they decide and what a human decides.

01

In engineering

Code generation and review, automated tests, documentation, assisted firmware. Every change goes through human review.

02

In your product

Document classification, assistants on your own knowledge base (RAG), data extraction from invoices and orders, reports.

03

On sensor data

Anomaly detection, predictive maintenance, scenarios that adapt to weather and consumption.

04

Governance

Traceability for every agent action, explicit limits, data that never leaves your infrastructure if that is what you need.

We do not promise “AI that solves everything”. We promise systems where AI does the repetitive work well and verifiably, and the important decisions stay with people.
How we work

Transparent, in stages, with deliverables at every step

You know from week one what you get, when, and what it costs. No surprises at the end.

1

Call & scoping

20 minutes to understand the problem; then a written proposal with scope, stages and budget.

1–5 days · free
2

Technical definition

Architecture, component and stack selection, risks, delivery plan.

1–2 weeks
3

Prototype / MVP

First working version, demonstrated on real hardware or in limited production.

3–8 weeks
4

Iterations & tests

Sprints with demos, automated and field tests, documentation as we build.

2-week sprints
5

Launch & support

Go-live, training, warranty, maintenance SLA if you need one.

ongoing

Engagement models

Fixed-price project

clear scope · funded projects

Defined requirements, firm budget and deadline, acceptance on deliverables. Ideal for EU-funded and grant projects.

Dedicated team (time & material)

evolving product · R&D

Allocated engineers, monthly billing on hours, priorities set together with you. Flexible when requirements change.

Prototyping sprint

new idea · fast validation

Fixed scope and price for a demonstrable prototype plus technical report. Then you decide with data, not assumptions.

Projects

What we have built

Anonymised case studies, delivered by the Stunner team directly or together with partner companies in our group. Clients are under NDA; the technical details are real.

Self-service touchscreen kiosk in a bakery café
Bakery & retailSoftwareEU-funded

Ordering and management platform with touchscreen kiosks, for two bakery producers

Challenge
Two producers with direct retail had approved EU-funded (PNRR) digitalisation projects with a fixed deadline and dense requirements: online ordering, payments, inventory, marketing, in-store kiosks, mobile app, reporting, ERP/CRM/AI.
Solution
Web + mobile platform built by us: ordering and payments, click & collect, loyalty, inventory, integration with 55" all-in-one touchscreen kiosks, reporting modules and AI components. Staff training. Acceptance documentation as required by the programme.
Result
Both platforms delivered and accepted within the project deadline, with 4 kiosks integrated. Digital ordering and payments in stores, centralised reporting for management; all committed DESI criteria met.
4 monthsWeb + mobile · kiosks · payments · ERP/CRM · AI
Sensor connected to a single-board computer on the test bench
Smart buildingIoTOwn product

Smart home & building automation platform with 100+ device profiles

Challenge
Modern buildings and homes have devices from dozens of manufacturers on different protocols (Zigbee, Z-Wave, IP). Users want one place to control them and rules that work without intervention.
Solution
The Stunner Core platform: multi-protocol gateway, cloud with time-series telemetry, rules engine (“Robots”) with scenarios adapted to weather and consumption, web and mobile app, roles and end-to-end encryption.
Result
Over 100 device profiles supported out of the box, rules running in production for years, a reusable base for clients' smart-building and automation projects.
2019 – ongoingZigbee · Z-Wave · MQTT · time-series · web & mobile
Construction site photographed from above by drone
Construction & PropTechIoT · AIEU-funded

Construction intelligence platform with reality capture: drones, 360° cameras, IoT sensors and robots

Challenge
A construction consultancy needed to compare as-built with as-designed continuously, track progress (S-curve, SPI/CPI/EAC) and generate work statements from real site data, within an EU-funded digitalisation project with full DESI requirements (ERP, CRM, cloud, IoT, AI).
Solution
A modular platform in 8 modules: data ingestion from drones, 360° and infrared cameras, IoT sensors and robots; storage (data lake + documents); vision processing and correlation; analytics and indicators; operational management; role-based UI; reporting; security (RBAC, audit).
Result
Platform contract in progress, with the equipment (drones, robots, cameras, servers) procured and integrated in the same project. 4-month delivery, 36-month warranty, 3-tier SLA.
4 months · ongoing 2026Drones · 360° · IR · IoT sensors · robots · vision AI · time-series
Wireless connectivity module held over a laptop with code
HardwareR&DConnectivity

Multi-protocol IoT gateway for our own platform

Challenge
Zigbee, Z-Wave and IP devices had to be aggregated locally, keep working offline when the internet drops, with encryption and remote updates — without depending on a closed off-the-shelf gateway.
Solution
A gateway designed in our lab: embedded Linux hardware with radio modules, firmware with offline buffering, telemetry encryption, OTA, secure provisioning and native integration with the platform cloud.
Result
The gateway runs in real installations, with OTA updates and no data loss during connectivity outages. The architecture is reused for industrial gateways (Modbus, LoRaWAN).
prototype in 8 weeks, then iterationsEmbedded Linux · Zigbee · Z-Wave · MQTT · OTA

All projects

Verifiable references on request, after signing an NDA.

See all
About us

Engineers since 2015, with our own prototyping lab in Romania

Stunner started as a software company and grew naturally into hardware and IoT, because client projects required both. Today the same team covers the whole chain: sensor, firmware, cloud, application.

  • We build, not just integrateWhen the off-the-shelf solution does not exist or does not fit, we design it — and it stays yours.
  • Senior by defaultEvery project has a senior engineer accountable from the first call to support.
  • VerifiableTested code, documentation, technical reports you can hand to an evaluator or a funding body.
More about us

The team: 9 engineers, 6 in R&D

F
Founder & DirectorStrategy, architecture, clients and funders
H
Lead Hardware & Embedded R&DElectronics, PCB, firmware, lab
S
Lead Software & CloudPlatforms, integrations, Agentic AI, DevOps
E
Electronics & PCB engineer R&DSchematic, layout, assembly, debugging
W
Embedded firmware engineer R&DESP32 / STM32 / Linux, protocols, OTA
M
Mechanical & prototyping engineer R&DEnclosures, 3D printing, integration, testing
I
IoT & connectivity engineer R&DGateways, Zigbee/LoRaWAN/Modbus, fleet
A
AI & data engineer R&DAgents, models on sensor data, pipelines
D
Full-stack engineerWeb, mobile, integrations, kiosks

Anonymised roles; named identities are shared in project discussions and proposals. The R&D badge marks the lab team.

STUNNER SRL · CUI RO34727187 · J26/662/2015
Str. Tudor Vladimirescu nr. 43, Târgu Mureș, Mureș County
Founded: 2 July 2015
Frequently asked questions

What clients ask before we start

Do you work with small companies, or only on large projects?

We work with SMEs, industrial companies and funded digitalisation projects. The smallest useful engagement is a 20-minute call followed by a written proposal; the smallest typical project is a prototyping sprint or an MVP of a few weeks.

How long does a working IoT prototype take?

A demonstrable prototype (electronics on a dev-kit or our own PCB, firmware, connectivity and a minimal dashboard) usually takes 4 to 8 weeks, depending on sensors and protocols. The small series follows field validation.

Can you deliver an EU-funded or grant project?

Yes. We have delivered software platforms with integrated equipment (kiosks, IoT devices) for EU-funded projects with fixed deadlines, including the documentation needed for acceptance. We work at a fixed price with clear deliverables, as these projects require.

How do you use AI and who is accountable for the result?

AI agents generate and review code, write tests and documentation; in client products they classify documents, extract data and answer from internal knowledge. Every change goes through human review; a senior engineer is accountable for the result.

Who owns the code, schematics and PCBs?

The client, upon full payment. We hand over source code, schematics, PCB files, firmware and documentation. We do not impose proprietary licences on custom work.

How much does it cost?

It depends on scope, but we say it upfront: after the initial call you receive a written proposal with stages and budget. Fixed price for a clear scope; dedicated team billed on hours for evolving products. We invoice in EUR for international clients.

Do you work remotely or on site?

Mostly remotely, with on-site visits when the project involves equipment installation, measurements or commissioning. We are based in Târgu Mureș, Romania (CET/EET), and work with clients across Romania and the EU.

Do you offer support after launch?

Yes: warranty for what we deliver, then maintenance and an optional SLA (response within hours for critical incidents), monitoring and OTA updates for devices.

Have a project that needs both software and hardware?

Tell us in 20 minutes what you want to build. We reply within 24 hours with the next steps.

Book a call contact@stunner.ro
Contact

Let's talk about your project

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We reply within 24 hoursOn working days you get a written reply from a senior engineer — with concrete questions or with the next steps.

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