Contract Mechanical Software Engineer Jobs in Indiana

Job#: 3046097
Job Description:
Senior Embedded Wireless Firmware Engineer
Location: Onsite, Monday-Friday (9:00 AM - 5:00 PM)
Employment Type: Contract
Pay Rate: $55-$60/hour
Education: Bachelor's Degree in Electrical Engineering, Computer Engineering, Computer Science, or related field preferred
Overview
We are seeking a Senior Embedded Wireless Firmware Engineer to support the design and development of next-generation connected devices and IoT solutions. This role requires expertise in embedded firmware development, wireless communications, real-time operating systems, and secure connected products.
The ideal candidate will have hands-on experience developing firmware for low-power wireless devices and collaborating with cross-functional engineering teams to deliver reliable, production-ready solutions.
Key Responsibilities

• Design, develop, test, and maintain embedded firmware for wireless connected products
• Implement and optimize bare-metal and RTOS-based firmware architectures
• Develop low-power embedded solutions for battery-operated devices
• Design and support bootloaders and firmware update systems
• Develop over-the-air (OTA) firmware update capabilities
• Debug firmware and hardware issues using industry-standard tools
• Collaborate with hardware, RF, systems, and test engineers
• Document software architecture, design decisions, and development processes
• Support product testing, validation, certification, and release activities

Required Qualifications
Embedded Firmware Development

• Strong programming experience in Embedded C
• Experience with ARM Cortex-M microcontrollers
• Expertise with bare-metal and RTOS-based firmware development
• Experience with interrupt-driven architectures
• Strong understanding of:
  • DMA
  • Timers
  • Watchdogs
  • GPIO
  • UART
  • SPI
  • I2C
• Experience developing bootloaders and firmware update mechanisms
• Experience using J-Link, SWD, GDB, or similar debugging tools
• Knowledge of low-power firmware design techniques

Wireless Communications

• Experience developing wireless embedded products
• Experience with one or more of the following:
  • Z-Wave
  • Proprietary sub-GHz wireless protocols
  • Mesh networking
  • Low-power wireless sensor networks
• Understanding of RF coexistence concepts
• Experience implementing OTA updates over wireless networks

Security

• Secure boot
• Firmware signing
• Key provisioning
• Encrypted OTA updates
• Secure pairing and authentication
• Replay protection
• Secure credential storage

Preferred Qualifications
Wireless Platform Experience
Experience with:

• Silicon Labs EFR32 devices
• Simplicity Studio
• Silicon Labs Gecko SDK
• Silicon Labs wireless stack APIs
• Z-Wave 700/800 Series
• SmartStart
• S2 Security
• OTA DFU mechanisms
• Wireless packet analysis and tracing tools

RF Engineering Knowledge
Preferred experience with:

• Antenna and PCB layout awareness
• RF sensitivity optimization
• Link-budget analysis
• Sub-GHz propagation behavior
• EMC/EMI troubleshooting
• FCC/CE certification support
• Spectrum analyzers and VNAs

Software Engineering Practices

• Modular firmware architectures
• State-machine design
• Event-driven systems
• Hardware abstraction layers
• Git workflows
• CI/CD pipelines
• Automated testing frameworks
• Strong documentation practices

Soft Skills

• Ability to work independently with minimal supervision
• Strong communication and collaboration skills
• Comfortable working closely with hardware and systems engineers
• Strong organizational and documentation habits
• Ability to assess technical risk and communicate realistic timelines
• Proven problem-solving and troubleshooting skills

Ideal Background
Candidates with experience developing wireless products for smart home, building automation, industrial, infrastructure, HVAC, or IoT environments will be highly regarded. Experience bringing connected products from concept through production is strongly preferred.
Everforth Apex is a world-class IT services company that serves thousands of clients across the globe. When you join Everforth Apex, you become part of a team that values innovation, collaboration, and continuous learning. We offer quality career resources, training, certifications, development opportunities, and a comprehensive benefits package. Our commitment to excellence is reflected in many awards, including ClearlyRateds Best of Staffing in Talent Satisfaction in the United States and Great Place to Work in the United Kingdom and Mexico.
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