
Millions of people use Freelancer to turn their ideas into reality.
Trusted by leading brands and startups
Wireless Sensors refers to a group of spatially dispersed and dedicated sensors for monitoring and recording the physical conditions of the environment and organizing the collected data at a central location. Wireless Sensors typically measure environmental conditions like temperature, sound, vibration, pollution levels, humidity, wind, etc.
Hire an IoT Engineer to help you with selecting or designing wireless connected sensors to gateways and cloud platforms.
Post your project for free and connect with skilled freelancers ready to start today. Compare bids, ratings and portfolios, and only pay when you're happy with the work.
~240 sec
to first bid
53+
bids per project
7k+
freelancers online
No upfront cost · pay only when you're happy with the work

7.9
7.9
99%

SYLHET, Bangladesh
$20 USD per hour
I've had a fascination with electronics ever since I was a young child. I became a circuit designer because of my obsession with robotics and electronics. I've been motivated to learn and research more because of the bachelor's major I chose. I've been working for approximately 4 years as a Professional PCB Designer and an Expert in Embedded Systems. The following services are offered by me: ✔ Schematic Design ✔ PCB Design (1/2/4/8 Layers) ✔ PCB manufacturing support ✔ 3D CAD Design of PCB (.obj /.step) ✔ Custom schematic library and PCB footprint creation I have done many projects till now. some of those are- ✔ 5-lead ECG device prototype for healthcare ✔ Oximeter SpO2 monitor ✔ Sports Activity monitoring device using mmWave radar technology ✔ Advanced PID controlled Line Following and obstacle avoiding robot ✔ Design and Implementation of Pulse oximeter ✔ 2G(Sim800c) & LTE(Sim7600g) based GPS tracker using ESP32 PICO mcu ✔ Disinfection tunnel for securing area from Covid-19 infection ✔ Solar powered incubator system with temperature and humidity control for smart agriculture ✔ IR remote & Wi-Fi based home automation system ✔ Contactless thermometer with image capturing device ✔ GPS based positioning and Speedometer device ✔ Using Dali, 0-10V, LoRa,WiFi, BLE modbus prototol various street lighting system devices ✔ 4-20mA to 0-5 industrial sensor reading development board I have experience about: 1.Circuit Design 2.PCB Design & Layout making using the following softwares : ✅ Altium ✅ Autodesk Eagle ✅ Proteus ✅ Orcad ✅ KiCad etc My goal is to provide : ✅ Best effort and quality for every project at reasonable rate ($) . ✅ Free servicing facility even after completing the project. ✅ The project perfectly within shortest possible time. Even i will try my best to complete my project before the expiration time.Please allow me to complete your project and i am ensuring my best effort for this.I would love to hear more about what would make this project successful for you and explore if we would be good fit to work together.I am looking forward to your response and wish you all the best for you future. So you can completely rely on me.

9.2
9.2
99%

Daska, Pakistan
$50 USD per hour
Live Experts LLC is a multidisciplinary technology company specializing in Engineering, AI/ML, Embedded Systems, IoT, and Automation Solutions for startups, businesses, and enterprises worldwide. With over a decade of technical delivery experience and hundreds of successfully completed projects, we help clients transform complex ideas into scalable, production-ready solutions that solve real business and operational problems. Our strength comes from combining software, AI, automation, electronics, and engineering expertise under one team. This allows us to handle both digital systems and real-world hardware projects with practical implementation experience. Our expertise includes: • Artificial Intelligence (AI) & Machine Learning (ML) • Generative AI & Conversational AI • AI Chatbots & AI Agents • Computer Vision & OCR Systems • Predictive Analytics & Data Intelligence • Workflow Automation & AI Integration • Embedded Systems & IoT Solutions • Arduino, ESP32 & Raspberry Pi Development • PLC, SCADA & Industrial Automation • Electrical & Mechanical Engineering Support • Sensor Integration & Smart Monitoring Systems • AI-Powered Dashboards & Business Platforms • Cloud APIs & System Integrations • Automation & Control Systems We work with modern technologies including: Python, OpenAI, ChatGPT, TensorFlow, OpenCV, Node.js, React, FastAPI, PostgreSQL, AWS, Docker, MATLAB, Arduino, ESP32, Raspberry Pi, PLC systems, and industrial automation platforms. What makes us different is our ability to bridge the gap between: AI + Automation + Embedded Systems + Engineering Many companies can build software. Others can build electronics. Very few can combine AI, automation, hardware, and engineering into complete intelligent systems that work in real business environments. We have experience working across: • Industrial Automation • Healthcare • Logistics & Fleet Systems • Manufacturing • Finance & Trading Systems • Smart Monitoring Systems • Operational Dashboards • IoT & Connected Devices • AI Business Solutions • Intelligent Automation Platforms Our development approach focuses on: • practical implementation • scalable architecture • clean UI/UX • reliable integrations • business-focused solutions • long-term maintainability • clear communication • premium execution quality Whether you need: • an AI-powered platform • an embedded IoT device • industrial automation • computer vision systems • AI automation workflows • predictive analytics dashboards • AI chatbots • sensor-based monitoring systems • electrical/mechanical engineering support • or a complete intelligent system Live Experts can help design, develop, and deploy reliable solutions tailored to your business goals. We believe in building long-term partnerships and delivering systems that create measurable operational and business value.

7.6
7.6
98%

Lahore, Pakistan
$16 USD per hour
✋ Hi! I am an Electrical/Electronics Engineer. I am expert in ✅ Professional PCB design( EAGLE, ALTIUM, easyEDA, PROTEUS, KICAD) ✅ Arduino/ Microcontroller(Arduino IDE, Platform IO, MPLAB, MIKROCHIP, ETC) ✅ TFT and Touch screen designs (Nextion, Visual designer, Nuritake, layout designer) ✅ MATLAB/Simulink ✅ IOT Technologies (BLE, Wi-Fi, RF, GSM, GPS, ESP32/ESP8266, STM32, MQTT, BLYNK, CODE BLOCKS) ✅ Mobile App Development( IOS, Android) ✅ CIRCUIT SIMULATION (Pspice/LTspice/Proteus/Multisim) ✅ C++/C/Java/Python/Php ✅ 3D Designs (AutoCAD/ Solid works/FUSION 360) ✅ MATHS /DIGITAL ELECTRONICS expert I am very experienced and I am sure you will be satisfied with my work. So please reach out to me so that we can discuss your project in greater detail!

9.1
9.1
94%

BANGALORE, India
$20 USD per hour
⚡ We help businesses design, build, and scale high-performance digital systems that directly impact revenue — from AI automation, AI voice agents, and custom SaaS platforms to real-time 3D configurators, animation, engineering, and hardware solutions. ⚡ We are a premium System Architecture, AI Automation, 3D, SaaS, Animation, and Engineering company helping businesses turn complex ideas into scalable products. 🏆 What We Specialize In ★★★★★ 🧠 🚀 AI Systems & Automation AI agents, AI chatbots, AI voice systems, conversational AI, LLM integrations, RAG pipelines, NLP, prompt engineering, AI content workflows, AI text-to-speech, AI video, AI image processing, AI research, automation workflows, Twilio, n8n, Zapier, Retell AI, Whisper AI, OpenAI, Claude, Llama, Mistral, DeepSeek, Vector Databases, and enterprise-grade AI architecture. ⚙️ SaaS & Software Development Custom SaaS platforms, full-stack web apps, API development, backend systems, frontend systems, microservices, software architecture, WebRTC, FastAPI, React.js, JavaScript, Python, Java, Google Cloud, AWS, Firebase, Kubernetes, DevOps, web security, software testing, test automation, dashboards, analytics, and scalable cloud deployment. 🎮 3D Configurators & Real-Time Systems Unity 3D, Unreal Engine, Three.js, WebGL, 3D product configurators, real-time rendering, 3D visualization, architectural visualization, 3D rendering, 3D modeling, 3D assets, AR/VR assets, interactive product experiences, digital twins, 360-degree video, and Web-based 3D systems. 🎬 Animation, Video & Creative Production 3D animation, 2D animation, explainer videos, motion graphics, VFX, visual effects, video editing, video production, YouTube ads, Facebook ads, Instagram ads, game trailers, music videos, sound design, sound effects, audio editing, AI animation, AI-generated video, AI influencers, Blender, After Effects, Premiere Pro, Houdini, Final Cut Pro, Photoshop, Illustrator, and digital art. 🔬 Engineering, CAD & Hardware CAD/CAM, SolidWorks, AutoCAD, Fusion 360, Revit, Civil 3D, ArchiCAD, 3D CAD, product design, mechanical design, automotive engineering, electronics, PCB layout, circuit design, firmware, embedded systems, IoT, wireless sensors, DSP, thermal analysis, CFD, FEA, Ansys, DFM, engineering drawings, technical drawings, tech packs, 3D printing, and hardware prototyping. 📈 Marketing, Lead Generation & Growth Systems Lead generation, data scraping, web scraping, data extraction, SEO, SEO auditing, keyword research, Google Analytics, website analytics, content marketing, social media marketing, Instagram marketing, Facebook Ads, Google Ads, Amazon Ads, email marketing, market research, sales automation, and digital marketing systems. Website: www.ekarthaans.com

7.5
7.5
88%

Çankaya, Turkey
$30 USD per hour
DearSir, My background is related with: -Digital Motor Control -Analog Design -Electronic Design -PowerElectronics -Renewable energy -PCB design -Embedded system -Matlab -Simulation of hardware For each concept descriptions are as follows: Digital Motor Control: -3-phase induction motor vector control drive -Flux estimation algoritm generation -DSP(TMS320) implementation on motor drive -Low speed application -Torque and speed loop generation -Control algoritms -BLDC motor -Step motor -DC motor Analog design -Low power distribution -Noissless special opamp based analog circuits -Analog filters -Orcad simulation of several circuits Electronic Design -RF transmitter and receiver -Bluetooh reade rand transmitter -Magneticreader PowerElectronics -Implementation motor drive -AC/DC converter -DC-DC converter -Battery charger -Solar inverter -Renewable Energy -Uninterruptle power supplies PCB design -Schematic design by Altium -PCB design by Altium -Power board design -SMPS board design -Easyeda -CAD files of manufacturers Embedded system -ESP32,ESP8266,modules -Bluetooth and Wifi -PIC18,PIC24,PIC30 and dsPIC applications -Ardino -MSP430 -Atmel -DSP(Texas Instruments) -Renesas -STM32 -C2000 Matlab -Power Electronics simulation -Motor drive -WindEnergy -Solar Energy -Control applications Simulation of Hardware -Orcad Simulation (TI,National, LinearTech, Maximlibraries) -LTI -National -Matlab -Easyeda

6.7
6.7
95%

Bahawalpur, Pakistan
$30 USD per hour
Hello, I’m Muhammad, an Electronics and Embedded Systems Expert who, along with a team of 6 other professionals, is well-versed in all the top machine and electronic techniques, systems, and products. Over the past 5 years, I’ve developed skills that lend themselves to many different areas of Electronics and Systems, cryptography, network security and Mathematics/Statistics, including (but not limited to): 1. Electrical and Electronics 2. Embedded system 3. Power Electronics 4. Opto-Electronics 5. Electrical Machine 6. Industrial 7. Microcontroller and Microprocessor 8. DLD and VLSI 9. Robotics 10. Microwave, EMT, and Antenna 11. Arduino 12. Raspberry Pi 13. ESP series (ESP32 and ESP8266) 14. Microcontrollers (8051, PIC, AVR, ARM, and Atmega) I’m also fluent in a number of programming languages, such as: 1. C# 2. C/C++ 3. Python 4. JAVA 5. Assembly Language Overall, my team and I look to offer services that we can complete successfully, on time, or better, and within your budgetary expectations. We never agree to anything we can’t handle, and we’ll always abide by agreed-upon deadlines and project specs. It’s your project, we’re just carrying it out. We have experience in Machine Learning, Cryptography, PCB Design Software, and Circuit Schematic Design (among many others), so if you have any project in the realm of the things listed above, don’t hesitate to let us know! My team and I are happy to discuss any project you may be sitting on and will ensure successful completion above your expectations. Thanks for stopping by, and I hope to hear from you soon!

7.8
7.8
92%

Charsadda, Pakistan
$25 USD per hour
I started out as an engineer, not a freelancer. Chemical engineering taught me to think in systems, where every input, reaction, and constraint has to balance before anything works. What I did not expect was how far that way of thinking would travel. Over the past 10 years, one project pulled into the next. A spreadsheet that needed automating taught me VBA. A client who needed forecasts pulled me into financial modeling. A pricing problem turned into a data science build. Each job added a tool, a method, a discipline. Bit by bit that became more than 400 skills spread across data science, web and app development, accounting and finance, civil, chemical, mechanical, and structural engineering, Excel and AI automation, VBA, coding, and design. The number is not the point. The point is what that range lets me do. When a problem sits between fields, where the finance touches the engineering, or the data feeds the automation, I do not have to hand you off to three different people. I can hold the whole picture and build it end to end. That is how a 32,255-SKU catalog, a 23-sheet investment P&L model, a 3,544-product pharmaceutical pricing engine, and a 26-region sales control tower with 1,624 formulas all came from one person. Over 50 international clients have trusted me to take a problem from a vague brief to a finished system that holds up under real use. So if your project does not fit neatly into one box, that is exactly where I do my best work. Tell me what you are trying to build, and I will tell you how I would make it work.

7.5
7.5
94%

Jajpur Town, India
$40 USD per hour
Hello everyone! At Smartimate Tech Solutions we always try to provide best solutions to our clients for all their Iot, Automation and App development needs. Our expertise on different software includes: ● Arduino ● EspresssIF ● STM32 ● .Net MAUI ● Azure We aim to deliver the utmost satisfaction to my clients and offer them the best quality results. Our services include: ● Automation Software development and hardware design ● STM32 Firmware development ● Espressif Development ESP12, ESP32, ESP8266 (NodeMCU, WemOS etc), ESP-CAM ● Firmware Development for Arduino such as Arduino Nano, Mega, UNO, etc.) ● Windows IoT Development ● Raspberry Pi Development ● Electronics design ● .Net MAUI Multiplatform Development (Android, IOS, Windows, macOS)

6.6
6.6
100%

Islamabad, Pakistan
$30 USD per hour
✋ Hi there! I’m Abdul Majeed, an experienced Embedded Systems Engineer and Professional PCB Designer with expertise across a wide range of cutting-edge technologies. Here’s what I bring to the table: ⚡ Microcontroller Programming: ✔ Nordic: nRF51, nRF52, nRF53 ✔ TI: CC13xx, CC25xx, CC26xx, CC32xx ✔ 8051: Atmel, Intel, Nuvoton ✔ STM: STM8, STM32, BlueNRG-1, BlueNRG-2 ✔ AVR: 8-Bit, 32-Bit ✔ Cypress: BLE PSoCs ✔ Dialog Semiconductor: DA1458x, DA1453x ✔ ESP: ESP12, ESP32, ESP8266, ESP32 S3, ESP32 C3 ⚡ Electronic Development Boards: ✔ Arduino Uno, Nano ✔ STM32 Nucleo and Discovery ✔ TI's Launchpad ⚡ Single Board Computers: ✔ Raspberry pi ✔ Banana Pi ✔ Beaglebone Black ⚡ Electronics Modules: ✔ RFID and Fingerprint Modules ✔ RF Transceivers: Silicon Labs chips, Zigbee, Wi-Fi, Nordic, etc. ✔ Camera Modules: Omnivision ✔ Storage: SD card and memory chips ✔ Display Modules: LCD, GLCD, TFT, LED, OLED, etc. ✔ IoT Modules ⚡ Computer Software: ✔ Development IDEs: Keil, Visual Studio Code, STM32 Cube IDE ✔ PCB Design: Altium, Eagle, KiCAD, Easy EDA ✔ App Development: Blynk IOT, Adafruit IO, Arduino cloud, Thingsboard ⚡ Simulations Software ✔ MATLAB Simulink ✔ Proteus ✔ Logisim ✔ Multisim ⚡ IoT & Wireless Communication ✔ Proficient in Wi-Fi, BLE, Zigbee, LoRa, HTTP / HTTPS, and MQTT protocol. ✔ Expertise in wearable IoT devices, smart home automation, and industrial IoT projects. ⚡ System Integration & Prototyping ✔ Firmware and hardware integration for sensors, motors, and actuators. ✔ Real-time protocols: FTP, TCP/IP, and RTSP ✔ Extensive experience with streaming, data acquisition, and remote control systems. ⚡ Microcontroller-Based Projects: ✔ Automatic Street Light System: STM32-based power-efficient lighting system controlled by ambient light sensors. ✔ Gesture-Controlled Robot: ATMEGA32-powered robot using accelerometer and gyroscope modules. ✔ Smart Trash Bin: A touchless waste management system using proximity sensors and servo motors. ⚡ Industrial Projects: ✔ Industrial IoT Gateway: A robust NodeMCU-based gateway for connecting industrial devices to cloud platforms. ✔ Battery Management System (BMS): STM32-based controller for monitoring lithium-ion battery packs. ✔ Motor Driver PCB Design: Compact and efficient PCB for controlling DC motors with ESP32. ⚡ PCB Designing Projects: ✔ Power Supply PCB: Design of a regulated dual-output power supply with overcurrent protection. ✔ Custom Sensor Node PCB: Low-power PCB with temperature, humidity, and pressure sensors for wireless data transmission. ✔ RF Module PCB: Compact PCB for RF communication with optimized antenna layout. ⚡ Why Choose Me? ✔ On-time delivery and top-notch quality at reasonable rates. ✔ Free support and maintenance after project completion. ✔ Client satisfaction is my top priority! Let’s bring your ideas to life with innovation and precision! Any questions? Interested in working with me? Send me a message or hit the ‘Hire Me Now’ button and let’s get started!
An IoT engineer designs, builds, and deploys connected device systems that link sensors, embedded hardware, networks, and cloud platforms to collect data and automate physical processes. Hiring a freelance IoT engineer gives you access to specialised expertise across firmware, wireless protocols, edge computing, and cloud integration without the overhead of a permanent in-house team.
An Internet of Things engineer turns connected hardware concepts into working products. They handle the full stack: microcontroller firmware, sensor integration, communication protocols, gateway logic, cloud telemetry pipelines, and the dashboards or mobile apps that surface device data to end users.
Commercially, this matters because IoT projects fail when any single layer is weak. A device that ships clean data but cannot scale on the cloud is useless. A robust backend with unreliable firmware bleeds support costs. A skilled IoT engineer owns the integration points between layers so the system works end to end in the field.
Freelance IoT engineers on Freelancer.com handle a broad range of tasks across hardware, embedded software, connectivity, and cloud. Typical deliverables include:
IoT engineers serve a wide range of sectors. Common applications include industrial IoT and predictive maintenance in manufacturing, smart agriculture for soil and irrigation monitoring, fleet tracking and telematics in logistics, energy monitoring and smart metering for utilities, connected medical devices and remote patient monitoring in healthcare, and smart home or building automation for residential and commercial properties. Retail uses include inventory tracking with RFID, while smart city projects cover air quality sensors, parking, and street lighting.
Strong IoT specialists work fluently across several layers of the stack. Expect proficiency with C and C++ for embedded work, Python or Node.js for backend services, and frameworks like FreeRTOS, Zephyr, PlatformIO, and the Espressif ESP-IDF. On the connectivity side, MQTT, CoAP, AMQP, HTTPS, and WebSockets are standard. Cloud-side, look for experience with serverless functions, time-series databases such as InfluxDB, message brokers, and visualisation tools like Grafana. Version control through Git and CI/CD pipelines for firmware builds are baseline expectations.
Choosing the right IoT consultant comes down to matching their experience profile to your project layer. A firmware-heavy project needs different signals than a cloud-heavy one. Look for these markers:
Sample interview questions you can use directly:
Freelancer.com gives you access to a global pool of IoT engineers, embedded developers, and hardware specialists across every major time zone. You can compare portfolios, ratings, and verified work history side by side, and shortlist candidates whose experience matches your stack — whether that is ESP32 firmware, AWS IoT Core deployment, or LoRaWAN gateway integration. Clients set their own budgets and receive competitive bids, so pricing reflects the scope you actually need. Milestone Payments protect funds until each phase of the project is delivered, which matters on multi-stage hardware-and-software builds where firmware, cloud, and app work are often delivered in sequence.
Ready to build a connected product or scale an existing IoT deployment?
Hiring an IoT engineer is straightforward when your brief reflects the layers of the stack you actually need built. The process below walks through posting your project, reviewing proposals, and awarding the work to the right specialist for your hardware, connectivity, and cloud requirements.
The project post is the single biggest determinant of bid quality. A clear brief filters for IoT engineers whose firmware, protocol, and cloud experience genuinely match your build, while a vague brief attracts generic responses. Head to the
Bids are short proposals, not just price quotes. They reveal how each IoT engineer interprets your brief, what stack they propose, and what timeline they consider realistic. Read the proposals carefully and shortlist candidates whose technical reasoning matches the work.
The final decision combines proposal quality with profile evidence. For IoT work, weigh consistency across past projects rather than a single impressive demo, since fielded devices reveal more about an engineer's discipline than prototypes do.
Timelines vary by scope. A firmware feature on existing hardware may take a week or two, while a full prototype covering custom PCB, firmware, cloud backend, and dashboard typically runs several months. Production-ready, certified devices take longer once testing and compliance are factored in.
For small projects, a single full-stack IoT engineer is usually the most efficient choice and avoids handoff issues between hardware and cloud. For larger products, you may want a specialist firmware engineer, a cloud or backend engineer, and a hardware designer working together. Many freelancers on Freelancer.com cover the full stack but lean toward one layer.
Yes. Proof-of-concept work is one of the most common engagements, often using off-the-shelf development boards like ESP32 or Raspberry Pi paired with a cloud platform such as AWS IoT Core. A clear scope and success criteria help the freelancer deliver a working demo quickly.
An embedded engineer focuses on firmware and hardware-level software, often without networking. An IoT engineer extends that work into connectivity, cloud telemetry, security, and the systems that consume device data. Most IoT engineers have embedded backgrounds but also bring cloud and protocol expertise.
Some do. Many IoT engineers can design schematics and simple PCBs in KiCad or Altium, while complex multi-layer boards or RF design typically need a dedicated hardware engineer. State your hardware needs in the brief so candidates can confirm fit.

Freelancer Enterprise
Use our workforce of 89.1 million to help your business achieve more.

Freelancer API
Why hire people when you can simply integrate our talented cloud workforce instead?
Post a project today and get bids from talented freelancers
Get some inspiration from Wireless Sensors projects

Game.
$50 USD in 9 days.

Package Design.
$110 USD in 4 days.

Music Video.
$300 USD in 12 days.

Interior Design.
$269 USD in 14 days.

Poster.
$100 USD in 3 days.

Flyer Design.
$15 USD in 1 day.

Concept Design.
$100 USD in 10 days.

Socials Post.
$50 USD in 6 days.
Millions of users, from small businesses to large enterprises, entrepreneurs to startups, use Freelancer to turn their ideas into reality.
89.1M
89.1M
Registered Users
25.7M
25.7M
Total Jobs Posted