Embedded Firmware Engineer -RF Focus at Aaizel International Technologies Pvt Ltd · Gurugram · 2 - 5 years · ₹7L - ₹13L / yr · Raised funding · Posted 13 Jun 2026

Embedded Firmware Engineer -RF Focus
Job Title: Embedded Firmware Engineer (RF Focus)
Location: Gurgaon, Haryana (On -site)
Employment Type: Full-Time
Experience: 3-5 years
We’re hiring an Embedded Firmware Engineer (3–5 yrs) with strong experience in Sub-GHz RF, LoRa/LoRaWAN, and IoT systems. The role focuses on firmware development, RF communication, and secure telemetry.
About Aaizel Tech
Aaizel Tech is a pioneering tech startup at the intersection of cybersecurity, AI, geospatial solutions, and more. We drive innovation by delivering transformative technology solutions across industries. As part of our dynamic team, you'll gain hands-on experience and learn from experts who are dedicated to pushing the boundaries of what's possible.
Responsibilities
• Develop firmware for STM32 (WL/H/L/F series)
• Design & implement Sub-GHz RF (403/433/868/915 MHz) systems
• Work on LoRa PHY/MAC & LoRaWAN stack (OTAA/ABP, uplink/downlink)
• Perform RF testing & debugging (RSSI, SNR, range testing, SDR/spectrum tools)
• Implement secure communication (AES-128/256, CRC/SHA)
• Develop drivers: UART, SPI, I2C, ADC, DMA
• Work with FreeRTOS (tasks, queues, ISRs, low power)
• Build communication stacks: RS485/Modbus, RS232, MQTT, TCP/IP, UDP
• Implement bootloader & OTA updates
• Debug using SWD/JTAG, logic analyzer, DSO
• Optimize for performance, power, and RF reliability
Requirements
• 3–5 years in embedded firmware + RF systems
• Strong in Embedded C, STM32CubeIDE, HAL/LL
• Hands-on with LoRa/LoRaWAN & Sub-GHz communication
• Understanding of RF fundamentals (link budget, interference, antennas)
• Experience in secure communication (AES)
• Good knowledge of FreeRTOS & industrial protocols (RS485/Modbus)
• Strong debugging skills (firmware + RF)
• Basic hardware/RF PCB understanding
Good to Have
• Experience with ChirpStack / TTN
• Knowledge of FSK/GFSK
• RF certification exposure (CE/FCC/ETSI)
How to Apply
• Please submit your resume, portfolio, and a cover letter outlining your relevant experience and how you can contribute to Aaizel Tech’s success.

About Aaizel International Technologies Pvt Ltd
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Job Description
Are you passionate about making a difference in people's lives through groundbreaking products and services ? Look no further! Protectol Health is a pioneering pharma-tech company with a holistic approach that spans conventional pharmaceuticals, nutraceuticals, nutrients, and business safety. Our dedication to the value of "Life matters" is not just a slogan – it's ingrained in every facet of our work culture and offerings.
With dedicated divisions in Pharma, Technology, Nutraceuticals, Nutriments, and Business Safety, we drive impactful research and development activities that redefine industries and touch lives. Our operational footprint extends across the GCC countries and India, allowing us to reach and transform communities on a grand scale.
If you're enthusiastic about creating a positive impact and wish to be a part of an organization that values and prioritizes lives, Protectol Health welcomes you. Join us in our mission to shape a healthier present and future. Your expertise and passion will find a meaningful home here.
Roles and Responsibilities
As an Embedded Firmware Engineer, you will be responsible for:
● Leading the firmware development for our product line of safety and medical devices.
● Designing, developing, testing, and maintaining embedded firmware.
● Collaborating with cross-functional teams to define software requirements, specifications, and architectures based on product requirements and industry standards.
● Implementing firmware solutions that comply with ATEX certification, IEC 61508, and Functional Safety (SIL standards) for devices used in hazardous locations.
● Conducting thorough testing and validation of firmware to ensure reliability, accuracy, and compliance with safety standards.
● Optimizing firmware for power efficiency and performance to meet the life of portable and battery-powered devices.
● Implement firmware algorithms for sensor calibration, data processing, and user interface interactions.
● Assisting in hardware-software integration, debugging, and troubleshooting to ensure seamless functionality of the devices.
● Collaborating with Quality Assurance and Product Validation teams to ensure the highest quality of firmware deliverables.
● Participating in code reviews and providing constructive feedback to improve code quality and maintainability.
● Keeping abreast of emerging technologies, industry trends, and advancements in embedded systems for continuous improvement and innovation.
Skills and Qualifications:
● Bachelor's or Master's degree in Electrical Engineering, Computer Engineering, or related field.
● 3+ years of experience in embedded firmware development for portable and wireless gas detectors and docking stations.
● Proficiency in C/C++ programming languages for embedded systems.
● Hands-on experience with a complete product development cycle is an add-on.
● Experience with STM32/STM8/ MSP430 or any other low-power microcontrollers for the development of low-powered devices.
● Experience in reading and optimizing analog data in various types of ADCs.
● Understanding of ATEX certification requirements and compliance.
● Understanding and practical experience with Functional Safety standards (SIL2/3 standards) in the development of safety-critical systems is an add-on.
● Experience with coding standards. (eg: Misra-C) Familiarity with System architectures and communication protocols like I2C, UART, SPI, etc. Knowledge of sleep modes and low-power optimization techniques for battery-operated devices.
● Experience in developing and using custom segment LCDs (TN, STN, etc.) used in battery-powered ultra-low power devices.
● Experience with software development tools, version control systems, and bug-tracking systems. Strong analytical and problem-solving skills with attention to detail.
● Excellent communication and teamwork skills.
● Advantages for individuals who thrive in a startup setting.
Work Culture
At Protectol Health, we prioritize our diverse and talented team. We offer flexible work arrangements and resources for well-being to support our employees' personal and professional growth. By putting people first, we attract and retain top talent and drive innovation toward our mission of improving health and well-being
Primary skills:
At least 3+ years of working experience on embedded firmware development
- Experience in multithreaded programming, network programming (wired and wireless protocols), real-time programming, cross-platform and cross-language development
- Hands-on experience on driver development for various sensors
- Working knowledge of communication protocols like UART, I2C, SPI, USB, Ethernet, etc
- Product development experience with range of microcontroller/microprocessor architectures, adoption of bare-metal, RTOS and Linux operating systems on new platforms
-Hands-on experience on software development in Bluetooth domain is added advantage
- Experience with hardware lab equipment such as digital scope, logic analyser and JTAG
- Understanding of embedded development constraints and system performance
- Experience with programming in C/C++ and Embedded C
Min 4 Years Experience in Embbeded domain
1. C++
2. C++ ★ Profinet ProfiSAFE ★ Embedded RTOS
3. rtos c c++ python ★ Industrial protocols Embedded Security Threat Modeling ★ Embedded C Embedded Linux
4. Embedded Systems ★ Embedded C ★ C++ ★ RTOS
- Design, implement, and test production- grade core robotic software components possibly including perception systems, motion planning systems, or command and control systems. • Design, implement, and test software integration components with other robotic platforms and warehouse management systems
- Design, implement, and test customer- specific software components
- Develop testing frameworks and support testing for core software components • Develop logging and data analytics systems for deployments
- Follow production- level code design and development processes including detailed documentation, code reviews, and structured release processes
Skill Required
Technical
-
● The suitable candidate shall have most of the following knowledge /skills/experience:
-
● Clear fundamentals of Analog and Digital Electronics. Knowledge of Full Hardware
-
Design Life Cycle.
-
● Knowledge of Circuit Simulation (PSPICE, NI Multisim, etc).
-
● Hand- On experience with HW designing rules, PCB Layout in Cadsoft Eagle/Altium Designer etc.
-
● Should have knowledge & experience with designing & developing 8/16 bit Microcontroller based close loop control systems and Arduino Platform.
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● Circuit building and Circuit Analysis Skills.
-
● Component Data Sheet analysis skills.
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● Project Requirement Analysis Protocols/Ethernet, Wi-Fi, USB, Serial interfaces(SPI, I2C, RS485, RS422, RS232).
-
● Hands-on experience in utilizing test equipment like DMM, Oscilloscopes, Logic Analyzers, Function/Signal generator/Solder Station (SMD/DIP).
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● Knowledge about Board Bring Up process.
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● Testing (Integration testing, protocol/Driver testing, etc.).
-
● Experience in Embedded C programming and embedded system integration and can develop test cases for the same.
-
● Knowledge of IoT Open Source Programming / Development.
-
● Candidate will be responsible for research & development of M2M/IoT products.
-
● Candidate will be responsible for end-to-end embedded system integration.
-
Others
Abilities on the following shall be of added advantage:
-
● Component Procurement
-
● Vendor Interaction
-
● Tools Management
-
● Costing and resource estimation
-
● Team management, Good Communication Skills, Pleasant Personality, Positive Attitude & Highly Creative
-
-
Decision level
Contributory: Makes major contribution to decision or policy judgment on Technical matters of IoT/ M2M Projects, Vending MachinesDemonstrate (Key competencies)
Healthy knowledge of most of the following:
-
● Embedded C
-
● 8/16 bit Microcontrollers
-
● Atmel Studio/ Arduino IDE
-
● Schematic / PCB layout design in Cadsoft Eagle / Altium Designer (SMD/DIP)
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● Hands-on experience on Test equipment and solder stations (SMD/DIP)
-
● M2M / IoT based development
- Firmware Design and Development experience on different micro-controllers.
- C/C++ programming
- Linux Commands Operating System Concepts
- board bring up, embedded software, Kernel Build, Yocto
- Shell scripting Networking Concepts Openwrt OS Concepts
- Must have good Communication and Presentable skills.
- Experience on any Wifi, Bluetooth, GSM modules is a plus.
- Design, develop, code, test and debug system software.
Relevant experience: 2-3 years
Responsibilities:
- Should be good at, C, C++, Linux driver development
- Should have worked in protocol like i2S, SPI, i2C. rf, 6lowpan, Tcp / Ip stack etc..
- Experience in porting MbedOS , FreeRTOS to different boards is good.
- Analyzing and enhancing efficiency, stability and scalability of system resources
- Design, develop, code, test and debug system software
- Provide post production support
- Interface with hardware design and development
Requirements:
- Proven working experience in software engineering
- Experience in hands-on development and troubleshooting on embedded targets
- Solid programming experience in C or C++
- Adequate knowledge of reading schematics and data sheets for components
- Strong documentation and writing skills
Note: Self-motivated, goal oriented and good analytical skills.
Experience in programming Embedded C applications.
• Strong development experience in embedded C and RTOS
• Strong debugging skills
• Embedded development tools and methodologies
• Version Control Systems – Clear Case / RTC /GIT
Should have detailed knowledge on microcontrollers / microprocessors
Should have detailed knowledge on Battery Electric Vehicle Powertrain (BEV), Fuel Cell and H2-Motor
Should have detailed knowledge in powertrain function development for BEV, Fuel Cell and H2-Motor
Strong development experience in MATLAB for powertrain function development
Strong development experience in CAN / LIN /Flexray / UDS / KWP, SPI communication protocols
Knowledge in tools like CANalyser / CANoe, CANDiva, CANstress, CANDELA studio, Lauterbach
Experience in scripting languages like Shell / Perl / CAPL / Make etc.,
Experience in using tools like Logiscope / Function Generator / Oscilloscope, etc
Experience in configuration management & defect tracking tools
Automotive domain and powertrain systems knowledge a plus
Ability to work as part of a dedicated project team and independently
Strong communication and interpersonal skills.
Must be a self-starter.
- Works towards developing Stable & Efficient Firmwares for Embedded
- Responsible for developing Firmware which are Stable, Efficient and scalable.
- Responsible to create coherent and scalable architecture designs.
- Responsible for understanding and utilizing best BLE / IOT
- Responsible for understanding various RTOS design principles.
- Qualification: B.E. / B.Tech / M.C.A. in Computer Sciences.
- Must Proficient in Embedded C, C++, BLE, Zephyr RTOS, nRF.
- Ready to work from home.
- Should have above 4 years of experience.
- Very strong knowledge in Embedded C including
- Data structures
- Function pointers
- Bitwise operations
- Experience with Finite State Machine (FSM) software design
- Required experience in AVR microcontrollers and projects to demonstrate it
- Familiarity with ARM 32 bit microcontrollers (Cortex M or any other)
- Required experience with common communication protocols like SPI, UART, I2C etc.
- Comfortable with reading datasheets and basic hardware schematics
- Comfortable with linux development environment including the use of GCC, gdb, makefile
Soft Skills
- Good communication skills
- Self-driven
- Passion for embedded engineering









