Senior Embedded Systems Engineer - Power, Battery & Performance

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COMPANY OVERVIEW

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Sigma Connectivity is a design house. We are a team of 600 talented engineers, and our main office is in Lund, Southern Sweden. Primarily, we run in-house projects focusing on connected products within consumer electronics and IoT devices, and we have the capability in terms of people, expertise, and labs to realize the most demanding products on the market. In the US, we have offices in San Jose, San Diego, and Seattle. The San Diego office is located close to Palomar Airport in Carlsbad, our office in San Jose is located just by the San Jose airport, and our Seattle office is in the heart of Bellevue. As a fast-growing company, we are constantly looking for open-minded, talented people who want to take part in our journey. The Sigma Connectivity company culture is about sharing experiences and knowledge, and with a Nordic work culture, we strive for work-life balance and taking care of people. Within Sigma Connectivity, you will never work alone.

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JOB OVERVIEW

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We are seeking a Senior Electrical Embedded Systems Engineer with a strong electrical engineering test and debug background, focused on system-level power characterization, battery characterization, and power-performance optimization on Qualcomm-based or similar complex embedded platforms.

This role is hardware-first and emphasizes embedded firmware, electrical measurements, battery behavior analysis, lab-based investigation, and power-model validation. The role requires enough Linux and/or Android system software knowledge to perform first-order analysis of software-driven power and performance issues. This is not a pure Android framework role.

The engineer will work hands-on with product schematics, power delivery networks, battery subsystems, lab instruments, structured test matrices, power models, logs, traces, and firmware behavior to explain real-world power and battery behavior across operating modes.

Responsibilities:

• Electrical & Power Measurement / Debug (Primary Focus)
• Lead hands‑on power measurement and debug activities, including current, voltage, rail‑level, and transient analysis using oscilloscopes, power analyzers, electronic loads, and bench supplies.
• Work directly from product schematics to understand power architecture, sequencing, and power‑delivery behavior.
• Build and execute structured test matrices covering operating modes, workloads, power states, and environmental conditions.
• Diagnose power anomalies by correlating electrical measurements with system behavior, thermal response, and software activity.
• Proactively investigate unexpected power drains, instability, or peak‑power events.

• Android Power & Thermal Engineering
• Analyze and optimize Android system power consumption across active, idle, sleep, suspend, and deep-sleep states.
• Investigate Android Power Manager, wakelocks, suspend/resume behavior, CPU idle states, DVFS, thermal management, and battery usage patterns.
• Debug power-related issues spanning:
  • Android Framework
  • System Services
  • HAL Layers
  • Device Drivers
  • Linux Kernel
  • Firmware
• Analyze BatteryStats, dumpsys outputs, Perfetto traces, systrace data, kernel traces, logcat logs, and vendor diagnostics.
• Correlate Android software behavior with measured electrical power consumption.
• Identify and resolve excessive battery drain, wakeup events, thermal throttling, and performance bottlenecks

• Power Characterization & Lab Validation
  • Design power measurement setups using:
    • NI DAQ systems
    • Monsoon power monitors
    • Oscilloscopes
    • Power analyzers
    • Current probes
    • Electronic loads
    • Bench supplies
  • Execute:
    • Peak current characterization
    • Sleep current characterization
    • Battery-life measurements
    • Thermal characterization
    • Performance-per-watt analysis
    • Power budget validation
  • Correlate electrical measurements with:
    • Android traces
    • Linux logs
    • Firmware traces
    • Thermal data
    • Performance counters

• Battery Characterization & Power Modelling
  • Battery Modeling & Power Systems Analysis
    • Perform battery characterization including:
    • Charge/discharge analysis
    • Current consumption profiling
    • Battery life estimation
    • Capacity validation
    • Thermal impact analysis
  • Develop and validate:
    • System power models
    • Power budgets
    • Battery-life models
    • Energy consumption models
  • Correlate measured results against predicted power models and identify deviations.
  • Present actionable recommendations to hardware, firmware, Android, and systems teams.

• Embedded Firmware & System Software (Supporting Focus)
• Perform first‑order investigation of software and firmware contributors to power and performance issues.
• Debug and analyze power behavior across:
• Embedded firmware (MCU / peripheral FW)
• Linux kernel and device drivers
• Android system services and power management layers (as needed)
• Understand and reason about CPU governors, idle states, suspend/resume behavior, and firmware‑controlled power features.
• Work closely with firmware and platform teams to align hardware power intent with software behavior.

• Power Modeling & Analysis
• Consume, interpret, and reason about system power models and budgets.
• Validate measured data against expected power models and identify deviations.
• Communicate findings clearly to EE, HW, FW, and system teams.

• Cross‑Functional Collaboration
• Act as a technical bridge between electrical engineering, hardware design, battery engineering, firmware, system software, validation, and customer-facing teams.
• Support platform bring-up, lab characterization, EVT/DVT activities, factory investigations, customer escalations, and design-for-power improvements.
• Document measurements, assumptions, models, deviations, open issues, and recommended corrective actions in a structured and review-ready format.

Basic qualifications

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REQUIRED EXPEREINCE & QUALIFICATIONS

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Required Expereince

• Qualcomm System Power Experience
• Candidate should have direct experience on Qualcomm-based platforms including:
  • Snapdragon application processors.
  • Qualcomm PMIC architecture.
  • Power-collapse states.
  • RPMh power architecture.
  • DSP subsystems (ADSP/SLPI/CDSP).
  • Qualcomm sleep and low-power modes.
  • Qualcomm power measurement frameworks.
  • Qualcomm bring-up and power validation activities.
  • Interaction between firmware, Linux kernel, Android framework, and silicon power states.

System-Level Power Debugging

• Lead root-cause investigations involving:

• Power consumption regressions.
• Battery life degradation.
• Thermal throttling events.
• Performance-per-watt optimization.
• Power-state transition failures.
• Sleep/resume failures.
• Excessive background activity.
• Peripheral-induced power drains.

• Expected to debug issues across:
  • Hardware
  • PMIC
  • Firmware
  • Device drivers
  • Linux Kernel
  • Android Framework

Qualifications

• 8+ years Embedded Systems experience.
• Strong Electrical Engineering debug background.
• Deep understanding of Android Power Management.
• Strong Embedded Linux experience.
• Qualcomm SoC platform experience.
• Experience with PMICs and power architecture.
• Experience with Android Framework, HAL, Kernel, and Driver debugging.
• Strong C/C++ development skills.
• Experience with power measurement equipment.
• Experience with system-level power characterization.
• Experience debugging power, thermal, and battery issues.
• Experience with schematics and board-level investigations.
• Experience building structured validation and characterization plans

Preferred additional skills, personal traits and experience

Preferred / Plus Qualifications

• Experience working with Qualcomm platforms or similar complex SoCs.
• Familiarity with system‑level power measurement frameworks (Qualcomm internal or equivalent).
• Experience digesting and validating power models and power budgets .
• Android power/thermal framework familiarity (helpful but not the primary focus).
• Experience with factory, EVT/DVT, or lab‑based power characterization.
• Exposure to embedded RTOS or bare‑metal development .

Personal characteristics:

• Team player
• Proactiveness in collaborating and execution
• Flexibility to switch technical context
• Willingness to learn new methods/tools/processes
• Ability to prioritize, multitask, and take ownership
• Strong problem-solving and critical-thinking skills
• Strong communication and interpersonal skills

We offer

The annual salary range for this role is $130,000 – $195,000 per year.

The Annual Salary depends upon various job-related factors such as professional background, training, work experience, location, business needs, and market demand. This range is subject to change and may be modified in the future.

Sigma Connectivity, Inc. also offers a comprehensive benefits package that includes the following:

• Paid Time off/Vacation and Paid Holidays
• 401(k)
• 401(k) matching
• Life insurance
• Flexible Spending Account (FSA): Healthcare and Dependent Care
• Health Savings Account (HSA)
• Paid Parental Leave
• Paid Bereavement Leave
• Employee Assistance Program
• Employee and Customer Referral Program
• For positions in California, long-term and short-term disability insurance