Senior Embedded Systems Engineer

Senior Embedded Systems Engineer – Environmental IoT Devices (Sensors, Compliance & Future-Ready Development)

Location: Coimbatore, India | Type: Full-time (On-site)Compensation: Up-to 8 LPA + ESOPs, health insurance

About Carbelim

Carbelim is an IIT-Madras and IIM-Lucknow backed climate-tech start-up pioneering nature-based carbon capture solutions using advanced microalgae photobioreactors. Our AI-driven systems purify polluted air, capture CO₂, and transform emissions into valuable bio-based products.

As a climate-tech company, our products are centred around air and water environmental monitoring, where precision, reliability, and long-term stability are critical. We are looking for a professional who aligns with our mission, understands our vision, and can take ownership of end-to-end product delivery.

IMPORTANT: Please read the initial project requirements for this position, as you will start with these and progressively move forward:

Role Overview

We are seeking a highly professional, senior-level Embedded Systems Engineer who can independently lead the design, development, and deployment of sensor-rich IoT devices — from concept to mass production, including compliance and regulatory approvals. Our immediate focus is on advanced environmental sensing systems for our photobioreactors and clean-air solutions. However, this role is also future-facing:

Future Readiness

We expect this engineer to play a key role in our upcoming next-generation products, which may include:

• Miniaturised environmental devices with dense sensor integration.
• Wearable devices capable of monitoring AQI and other environmental parameters.
• Compact portable AQI monitors and specialised monitoring systems for urban, industrial, and personal use.
• New sensor-driven innovations aligned with our climate-tech mission.

The selected candidate must be capable of:

• Designing compact, high-density PCBs for small form factors.
• Integrating MEMS air quality sensors and miniature particulate matter sensors.
• Managing power optimisation for battery-based or wearable devices.
• Working with flex-PCBs, low-profile components, and miniaturised connectors.
• Ensuring accuracy, reliability, and compliance even in constrained designs.

Key Responsibilities

• Lead end-to-end product development — from system architecture and component selection to prototyping, validation, certification, and scaling to full production.
• Select, integrate, and calibrate environmental sensors (air & water).
• Implement sensor communication protocols (I²C, SPI, UART, RS485, Modbus RTU, SDI-12, CAN) and apply signal conditioning for high accuracy.
• Develop embedded firmware (C/C++ or Rust) with deep MCU knowledge — low-power modes, interrupt handling, DMA, OTA updates, secure boot, and self-diagnostics.
• Design multi-layer PCBs optimised for compactness, manufacturability (DFM/DFT), and noise immunity.
• Integrate displays ranging from small OLED/TFT panels to large industrial touchscreens.
• Ensure compliance with CE, FCC, EMI/EMC, and IP65/IP66 standards.
• Collaborate with mechanical designers for enclosures, waterproofing, anti-fouling, and thermal management.

Must-Have Skills Environmental Sensor Knowledge Candidate must have hands-on integration experience and functional understanding of: https://docs.google.com/document/d/183-XDDofDS4Z7_O6p7DOFxNWffRZYuufUsxZrTfPOSk/edit?usp=sharing

Water Quality Sensors

• pH sensors
• Dissolved Oxygen (DO)
• Oxidation-Reduction Potential (ORP)
• Electrical Conductivity (EC) / Total Dissolved Solids (TDS)
• Turbidity / Optical Density
• Temperature sensors (PT100, DS18B20, etc.)
• Nutrient ion sensors (Ammonium NH₄⁺, Nitrate NO₃⁻, Phosphate PO₄³⁻)
• Flow sensors
• Pressure sensors

Air Quality Sensors

• CO₂ sensors (NDIR)
• Particulate Matter sensors (PM1.0, PM2.5, PM10)
• VOC sensors (metal-oxide, photoionisation)
• Formaldehyde (CH₂O)
• Ozone (O₃)
• Nitrogen Dioxide (NO₂)
• Temperature & Humidity
• Barometric Pressure sensors
• Light / PAR (Photosynthetically Active Radiation) sensors

Core Embedded & Hardware Skills

• MCU mastery — ESP32-S3, STM32, nRF52, or similar ARM Cortex MCUs.
• Low-level firmware development (interrupt handling, DMA, peripheral configuration).
• Low-power system design for portable/wearable devices.
• Secure OTA update implementation and bootloader management.
• Analog/digital circuit design, mixed-signal PCB design, noise filtering.
• Multi-layer PCB layout for compact designs (2–4 layer minimum, preferably high-density layouts).
• Experience with SPI, I²C, UART, RS485, Modbus, CAN, SDI-12.

Miniaturisation & Wearable Readiness (for future projects)

• Experience in compact product design and component selection for small form factors.
• Integration of MEMS-based environmental sensors.
• Flex-PCB design and use of low-profile/high-density connectors.
• Thermal management in enclosed small devices.
• Battery management (LiPo, Li-ion, coin cell) and charging circuit design.

Nice to Have

• EMC pre-compliance testing, CE/FCC filing experience.
• Experience with IP-rated enclosures for harsh environments.
• Prior work in climate-tech or environmental monitoring products.

Soft Skills

• Ownership mindset — accountable for timelines, risks, and outcomes.
• Strong communication and documentation skills.
• Passion for sustainability and delivering technology with environmental impact

Compensation & Benefits

• Up-to 8 LPA + ESOPs.
• Health insurance.
• Six-month probation (standard procedures apply).

Work Location

R&D and Production Center – No. 52, Prime Industrial Estate, Periyanaickenpalayam, Coimbatore, Tamil Nadu 641020 (≈ 5 km from Periyanaickenpalayam), close to PG accommodation optionsWorking Hours8:30 a.m. – 5:30 p.m., Monday – Saturday.

Job Type: Full-time

Pay: Up to ₹800,000.00 per year

Benefits:

• Health insurance

Application Question(s):

• Please enter the code you received (this is just to confirm you have read all the details about us and the project, ensuring we are aligned).
• If selected for the role, how soon would you be able to join?
• What is your current CTC?
• What is your reason for seeking a new job?
• Will you be able to work independently?

Work Location: In person

Speak with the employer
+91 7005192650