Technical Program Manager for Software Deployments

Become a Force for Good at Axon.At Axon, we are dedicated to our mission of protecting life. We tackle some of society's most pressing safety and justice challenges through our innovative ecosystem of devices and cloud software. Collaboration is at the heart of our work; we value open communication and diverse perspectives from our customers, communities, and each other.Life at Axon is dynamic, rewarding, and impactful. Here, you’ll take initiative and drive real change, constantly growing as you contribute to a mission that truly matters in a workplace where you are valued.Your ImpactThe Robotics & New Ventures division at Axon is spearheading the development of next-generation autonomous public safety technologies, including TASER-enabled drones, ground control stations, robotic systems, and the comprehensive command-and-control ecosystem that interlinks them. These sophisticated, multi-disciplinary hardware-software-firmware systems are designed, manufactured, certified, and deployed for law enforcement agencies across three continents.In this role, you will have the responsibility for the integrated execution of our flagship robotics platform's hardware portfolio. This encompasses drone hardware, ground control station hardware, radio integration, international contract manufacturing, regulatory certification, and product launch. Your work will involve multiple engineering disciplines, various build phases, numerous countries, and diverse vendor relationships. Your expertise will be essential in unifying all these elements, anticipating challenges, and achieving results that no single team could accomplish on its own.You will report directly to the Director of PMO and serve as the dedicated hardware execution leader, managing the integrated master schedule, risk register, vendor and manufacturing relationships across three countries, phase gate governance, and executive communication. You will step into a complex program that is already in progress, requiring you to quickly develop situational awareness and begin driving results within weeks.

As a Senior Technical Program Manager II at Axon, you will play a pivotal role in leading complex projects that drive innovation and efficiency across our technology landscape. You will collaborate closely with cross-functional teams to define project scope, develop timelines, and ensure successful delivery of products that enhance public safety.

Become a Force for Good at Axon.At Axon, our mission is to Protect Life. We are dedicated to addressing the most pressing safety and justice challenges through our innovative array of devices and cloud software. Collaboration is key to our success; we engage with transparency and empathy, valuing the diverse insights from our customers, communities, and colleagues.Life at Axon is dynamic, inspiring, and impactful. Here, you will take initiative and effect meaningful change. Experience continuous growth as you contribute to a mission that truly matters at a company that values your contributions.Your ImpactWe design and deliver products for law enforcement and the communities they serve at both national and global levels. You will spearhead the development of technologies that transform society, while advancing Axon's commitment to Protect Life and Capture Truth. Collaborating with some of the brightest minds in engineering across various domains, including cameras, sensors, and VR, you will oversee the creation of cutting-edge products from inception to launch while navigating complex challenges. Your agility, adaptability, and creativity will be essential in identifying optimal solutions for our most critical offerings, ensuring we deliver the best products available.What You’ll DoLocation: This role is based at our Scottsdale, AZ office, following a hybrid work schedule. We prioritize in-person collaboration, with team members expected to work onsite from Tuesday to Friday, while enjoying the flexibility to work remotely on Mondays unless an approved workplace accommodation is in place. We believe connection drives innovation, and our office culture is designed to foster meaningful teamwork, mentorship, and collective success.Reports to: Senior Director of Program ManagementLead cross-functional teams as the Engineering Program Manager in the Connected Devices pillar, making pivotal decisions on flagship products. This role focuses on enhancing existing market products through collaborative improvement initiatives, including design modifications driven by yield improvements, product performance enhancements, secondary sourcing, and cost reduction strategies.Create, monitor, and manage program budgets and timelines to ensure we deliver high-quality products that meet customer expectations.Act as a key stakeholder from early concept development through to product launch, influencing crucial decisions at every stage.Collaborate with a diverse technical team, encompassing electrical design, mechanical design, industrial design, software, firmware, quality assurance, validation, and manufacturing.Build and maintain strong relationships with internal and external stakeholders to facilitate successful project outcomes.

Become a Force for Good with Axon.At Axon, our mission is to Protect Life. We tackle society's most pressing safety and justice issues through our innovative ecosystem of devices and cloud software. Our collaborative culture thrives on openness and empathy, embracing diverse perspectives from our customers, communities, and each other.Working at Axon is dynamic, challenging, and purposeful. You will take ownership and drive impactful change, continually evolving as you contribute to a mission that truly matters.Your ImpactAs we accelerate the development and release of the next generation of de-escalation devices, the NPI group is implementing strategies to ensure our new products are scalable, cost-effective, and yield high performance. We seek skilled, motivated engineers to set expectations and drive results across various internal and external teams from design through to mass production. You will collaborate with multiple functional teams and have numerous opportunities to make a significant impact.What You’ll DoLocation: Onsite in Scottsdale/Phoenix, AZ officeReports to: Sr. Director, NPI EngineeringIn the role of Senior DFx Engineering Program Manager, you will play a critical technical role in the development and launch of new products, supporting the Engineering Program Manager and cross-functional teams to ensure designs are ready for large-scale production. Your involvement will span prototype builds, factory readiness, and the development of automation and testing systems, leveraging a strong foundation in manufacturing engineering, DFM/DFA, and hands-on technical execution. This position is perfect for an engineer who excels at the crossroads of product design, manufacturing, and automation, and who enjoys delving into the details to create scalable, efficient, and reliable products.Key Responsibilities:Lead comprehensive DFx reviews (DFM, DFA, DFT, DFS, DFR, DFQ) throughout SP, EVT, and DVT phases to identify design risks, cost drivers, yield limitations, and reliability issues before product release.Collaborate with design, reliability, testing, and manufacturing teams to translate DFx insights into actionable design modifications, manufacturing specifications, and validation strategies that facilitate high-volume, high-yield production.Assist the Engineering Program Manager in planning and executing builds through Axon's Product Lifecycle (APL), which includes System Prototype (SP), Engineering Validation (EVT), Design Validation (DVT), and Production Validation (PVT).

Become a Force for Good at Axon.At Axon, our mission is to protect life. We tackle society's most pressing safety and justice challenges through our innovative devices and cloud software solutions. Our collaborative culture fosters openness and respect, allowing us to draw on diverse perspectives from our customers, communities, and each other.Working at Axon is dynamic, rewarding, and impactful. You'll be empowered to take initiative and drive meaningful change, all while growing in an environment that values your contributions.Your ImpactWe are in search of a driven and experienced Program Manager for Adoption & Enablement to spearhead internal enablement and customer adoption throughout the Fusus lifecycle. This role emphasizes training delivery, curriculum development, quality assurance, and support following deployment.This position merges program oversight with hands-on instructor-led training, ensuring that both internal Axon teams and external law enforcement customers can effectively adopt Fusus workflows. Success in this role entails teaching platform functionalities and the technical concepts that facilitate successful deployments while converting real-world operational scenarios into scalable enablement experiences.The ideal candidate will be a robust cross-functional collaborator with a solid operational grasp of Axon Fusus, exceptional facilitation abilities, and the capability to independently execute training and enablement initiatives. This role is vital in ensuring customers transition seamlessly from deployment to ongoing support while optimizing product usage, operational readiness, and long-term results.What You’ll DoLocation: US-based Axon hub locations (Atlanta, Boston, Denver, Scottsdale, or Seattle metro areas)Travel: Approximately 50%Reports to: Senior Director, RTO SaaS DeliveryKey Responsibilities...

Become a Force for Good at Axon.At Axon, our mission is to Protect Life. We are innovators tackling the most pressing safety and justice challenges with our comprehensive range of devices and cloud-based software. Our collaborative culture thrives on openness and respect, embracing diverse viewpoints from our customers, communities, and team members.Life at Axon is dynamic, challenging, and impactful. Here, you will have the opportunity to take initiative and drive significant change while growing in a role that truly matters at a company that values you.Your ContributionAxon is dedicated to enhancing public safety through the development of groundbreaking technologies. Renowned for creating the original TASER energy weapon, our engineering team continually strives for excellence to maintain our leadership in the market.As a Senior Mechanical Engineer II at Axon, you will have complete design ownership over next-generation life-saving technologies, from conception to production, with your work being highly visible to senior leadership. Your collaborative efforts with product managers, electrical engineers, industrial designers, and manufacturing teams are essential for the team’s success and for ensuring public safety for generations to come.Key ResponsibilitiesLocation: Scottsdale, AZ [Relocation Assistance Available]Lead innovative product development from initial concept through to manufacturing.Employ creative problem-solving skills to drive the ideation of new product architectural concepts for subsystem and system-level designs.Build and analyze high-fidelity proof-of-concept prototypes.Conduct detailed mechanical analyses to ensure proper functionality through FEA, tolerance analysis, testing, and other investigatory methods.Engage regularly with both domestic and international stakeholders.Work both independently and collaboratively in a fast-paced, empowering environment.Enhance your engineering skills in a stimulating learning atmosphere focused on personal and professional growth.

Join Axon as a Senior Radio Frequency Engineer II, where you will play a crucial role in developing innovative communication systems that enhance public safety. In this position, you will leverage your expertise in RF engineering to design, analyze, and optimize cutting-edge radio frequency systems. Collaborate with cross-functional teams to ensure seamless integration of RF components into our products.

Be a Catalyst for Positive Change at Axon.At Axon, we are dedicated to the mission of Protecting Life. We are innovators addressing some of society’s most pressing safety and justice challenges through our suite of devices and cloud-based software. Collaboration is key to our success; we emphasize open communication and inclusivity, valuing diverse insights from customers, communities, and each other.Working at Axon is dynamic, demanding, and rewarding. Here, you will take the initiative and effect genuine change. Experience continuous growth while contributing to a mission that is impactful at a company that values you.Your ContributionAs a Senior Security Operations Engineer II, you will be pivotal in maintaining the resilience, efficiency, and scalability of our security framework. You will tackle intricate technical challenges, enhance our systems through strategic automation, and collaborate with cross-functional teams to ensure our services scale effectively. Your hands-on expertise will be crucial in executing new initiatives in the Identity domain, particularly in building, maintaining, and supporting PKI solutions at scale, along with providing additional support for user identity and access management (IAM) projects. Your contributions will directly influence system uptime, operational efficiency, and the overall developer experience—advancing our mission to deliver high-quality, mission-critical systems with agility.

Join Axon and be a Force for Good.At Axon, we are committed to our mission of Protecting Life. We are innovators tackling the most pressing safety and justice challenges through our suite of devices and cloud-based software. Our collaborative culture encourages open communication and values diverse perspectives from our customers, communities, and each other.Life at Axon is dynamic, challenging, and impactful. Here, you will take ownership and drive genuine change, continuously developing your skills while contributing to a mission that truly matters in a company that values your contributions.Your ImpactAs a Senior Manager within the Video Electrical Engineering team in R&D, you will lead a talented group of engineers and collaborate with design partners in the development of advanced video product electronics essential to Axon's Body Worn Cameras, In-Vehicle Video Systems, and accessory products including docking stations and connected peripherals. Your technical proficiency will guide the review and support of engineering projects, ensuring they align with delivery timelines, quality standards, and broader business goals. Your mentoring, cross-functional collaboration, and project execution skills will significantly contribute to Axon's commitment to enhancing public safety.Work Location: This position is based in our Scottsdale, AZ office. We prioritize in-person collaboration and ask that team members work onsite from Monday through Friday, unless a workplace accommodation is approved. We believe that strong connections fuel innovation, and our office culture is designed to promote teamwork, mentorship, and shared achievements.Reports to: Director, Electrical EngineeringDirect Reports: 6

Join Gusto as a Senior Engineering Manager in our Symmetry Product Development team! We are seeking a dynamic leader who is passionate about driving innovation and delivering exceptional engineering solutions. In this role, you will lead a team of talented engineers, fostering a collaborative environment that encourages growth, creativity, and technical excellence.Your responsibilities will include overseeing project development, mentoring team members, and ensuring that our products meet the highest quality standards. If you have a track record of successfully managing engineering teams and delivering top-notch products, we want to hear from you!

Join Axon and Become a Force for Good.At Axon, our mission is to protect life. As pioneers in tackling society's most pressing safety and justice challenges, we leverage our innovative ecosystem of devices and cloud software. Collaboration is at the heart of our operations; we foster a culture of open communication and inclusivity, valuing diverse perspectives from our customers, communities, and one another.Life at Axon is dynamic, rewarding, and purposeful. Here, you’ll have the opportunity to take charge and effect real change. Experience continuous personal and professional growth as you contribute to a mission that matters in a company that values you.Your ImpactLaw enforcement agencies require training systems driven by actual field performance data. Over the past few years, we have accumulated and validated this data, creating actionable insights that trainers can utilize to improve encounters, making them more effective, less harmful, and safer for all involved. While we have already deployed basic models, your role will involve not just delivering these models but also establishing a strategic pipeline to consistently provide data products to our customers for years to come. What begins in research must evolve into production-grade, dependable, and reusable solutions.Our small, highly skilled team is integrated within Axon's TASER division. Our work encompasses hardware telemetry and behavioral science; we analyze TASER device data, develop models that inform training recommendations for law enforcement agencies, and deploy analytical tools to deliver these insights to those who can act on them. Our analyses influence top-level executives, and our models become integral user-facing features. We are committed to achieving Axon’s ambitious goal: to reduce fatal officer-involved shootings by 50% in the next decade.The head of product previously served as a Staff Engineer. Our Technical Program Manager led a 60-person engineering organization. Both product managers possess quantitative academic backgrounds in applied mathematics and engineering. Our program manager for TREND is a former state police lieutenant with over 30 years of law enforcement experience. Our designer collaborates closely with the team instead of being isolated from it. We have built this team to encompass the full spectrum of engineering, data, product, and domain expertise, making this hire a critical, strategic addition.This environment is far from siloed — however, it does require you to be technically self-sufficient, as you may not always have another Software Engineer present. What you gain in return is a team with a depth of experience that surpasses most engineering settings you’ve encountered.

Be a Catalyst for Positive Change at Axon.At Axon, our mission is to Protect Life. We are adventurers at heart, tackling society's most pressing safety and justice challenges with our innovative ecosystem of devices and cloud software. Just like our products, we thrive on collaboration. We foster an environment of openness and empathy, valuing diverse perspectives from our customers, communities, and one another.Working at Axon is dynamic, rewarding, and impactful. Here, you'll take the reins and drive meaningful change, continuously evolving as you contribute to a mission that truly matters at a company where you are valued.Your RoleAs the Principal NPI Program Manager, you will spearhead the operational engine that transitions Axon's products from ideation to market readiness. From the initial SKU request submitted by the product team to its launch in the price book and readiness for quoting, you will be the cross-functional conductor—collaborating seamlessly with Product, Finance/FP&A, Commercial Operations (Quoting), Supply Chain, Operations, Legal, and IT.Your mission will be to design, implement, and continuously refine the NPI process—injecting discipline, transparency, and speed into a function that bridges product strategy and commercial execution. You will tackle critical issues that influence the design and sales success of Axon's products, while also shaping strategies for senior and executive leadership across various departments.

Role Overview Spectrum Retirement Communities is hiring a Director of Entertainment and Programming in Scottsdale. This position leads the design and delivery of engaging activities and events for residents. The focus: create meaningful experiences that enrich daily life for seniors. What You Will Do Develop and implement a variety of entertainment and programming options tailored to resident interests Collaborate with other departments to align activities with community needs and preferences Bring creativity and vision to enhance the quality of life for residents Who We’re Looking For Creative thinker with a passion for serving seniors Experience designing and managing programs or events Strong collaboration and communication skills

Become a Catalyst for Positive Change at Axon.At Axon, we are dedicated to the mission of Protecting Life. Our team is composed of innovators tackling the most pressing issues of safety and justice through our integrated ecosystem of advanced devices and cloud-based software solutions. We believe in collaboration, fostering open communication, and embracing diverse perspectives from our customers, communities, and colleagues.Working at Axon is exhilarating, demanding, and impactful. You will take initiative and help drive meaningful change while experiencing personal growth at a company that values your contributions.Your ContributionThe Physical Security Program Coordinator is a senior-level individual contributor who will spearhead the execution, coordination, and ongoing enhancement of vital corporate security initiatives within Axon, focusing primarily on Security Governance, Risk, and Compliance (GRC).This role operates with significant autonomy and responsibility, overseeing comprehensive security programs through structured governance, documentation, risk analysis, and cross-departmental collaboration. While not a managerial position, it is crucial for achieving program objectives, aligning stakeholders, and ensuring security measures are effectively implemented and audit-ready.The Coordinator acts as the primary liaison for security GRC efforts, training programs, risk oversight, and program infrastructure, collaborating closely with Legal, Compliance, IT, Facilities, HR, Events, and regional security teams.Your Daily ResponsibilitiesSecurity Program Execution & GRC Facilitation• Oversee daily operations and sustainability of enterprise security programs, including governance, risk management, compliance tracking, training, documentation, and reporting.• Assist in designing, maintaining, and continuously optimizing security policies, standards, procedures, and playbooks in alignment with regulatory and business mandates.• Conduct and manage security risk assessments, gap analyses, and mitigation strategies across facilities, programs, and initiatives.• Develop and manage metrics, dashboards, and reporting systems to enhance leadership visibility and decision-making.Security GRC, Compliance & Risk Oversight• Be a vital contributor to security GRC initiatives, collaborating with Legal, Compliance, Privacy, and Audit teams to fulfill regulatory, contractual, and internal obligations.• Organize security-related audits, evaluations, and evidence gathering sessions, ensuring that documentation is precise, thorough, and audit-ready.• Maintain the security risk register and other essential documentation.

About the INSPIRE Events Leadership Development Program Accor’s INSPIRE program in Scottsdale offers early-career professionals a structured path into events leadership. The program blends practical experience with mentorship and targeted training, all within the hospitality sector. What to Expect Hands-on learning in real event settings Guidance from experienced mentors Immersive training sessions focused on events and hospitality Who Should Apply This program suits individuals who are eager to grow in hospitality and events, and who want to build leadership skills that make a difference in the industry.

Become a Catalyst for Change at Axon.At Axon, our mission is to safeguard life. We are innovators tackling the most pressing safety and justice challenges through our suite of devices and cloud-based solutions. Just like our products, we thrive on collaboration, valuing diverse insights from our customers, communities, and each other.Experience the dynamic and impactful culture at Axon. Here, you will take charge and effectuate real change while continuously evolving in a role that contributes to a meaningful mission.Your Role and ContributionAs an RF Test Engineer, you will play a pivotal role in validating that the wireless technologies within Axon's state-of-the-art products adhere to the highest standards of performance, reliability, and compliance. Your hands-on expertise will facilitate the rigorous testing and optimization of RF systems that support our innovative body-worn cameras, vehicular systems, and connected devices. By applying your technical skills and analytical mindset, you will help uncover and resolve RF challenges, ensuring robust designs that function flawlessly in a variety of demanding environments.Collaborating with cross-functional teams and global partners, you will refine and verify wireless designs using cutting-edge tools and methodologies. Your contributions will directly impact the creation of reliable, high-performance solutions that serve Law Enforcement, Public Safety, and the communities they protect. Your work will help deliver transformative technologies that empower public safety professionals and set new industry benchmarks.Work Environment: This position is based in our Scottsdale, AZ office. We prioritize in-person collaboration and expect team members to work on-site Monday through Friday, unless an approved workplace accommodation is in place. We believe that connection drives innovation, and our in-office culture is dedicated to fostering meaningful teamwork, mentorship, and collective success.Reports to: Director, Electrical EngineeringDirect Reports: 0

Join Axon and Make a Difference!At Axon, our mission is to Protect Life. We are at the forefront of addressing the most pressing safety and justice challenges through our innovative ecosystem of devices and cloud-based software. Our approach fosters collaboration and open communication, embracing diverse perspectives from our customers, communities, and each other.Life at Axon is dynamic, rewarding, and fast-paced. Here, you’ll take ownership of your work and drive meaningful change. Grow continually while contributing to a mission that has real-world impact in an environment where you are valued.Your ContributionAxon is dedicated to enhancing public safety through the development of state-of-the-art technologies. As the creator of the original TASER energy weapon, our engineering team is committed to excellence, ensuring we remain a leader in the industry.As a Mechanical Design Engineer at Axon, you will have complete design ownership of next-generation life-saving technologies from the initial concept all the way to production, with your work being highly visible across all levels of the organization. Our passionate leadership, coupled with collaboration across various teams including product managers, electrical engineers, industrial designers, and manufacturing professionals, is crucial for our success and the safety of the public for generations to come.Key ResponsibilitiesLocation: Scottsdale, AZLead innovative product development from idea generation to manufacturing.Employ creative problem-solving skills to conceptualize new product architectures for subsystem and system-level designs.Create and evaluate high-fidelity proof-of-concept prototypes.Conduct comprehensive mechanical analyses to ensure optimal functionality using FEA, tolerance assessments, testing, and other exploratory methods.Engage regularly with both domestic and international stakeholders.Work independently and collaboratively in a fast-paced and empowering environment.Enhance your engineering skills in a vibrant learning atmosphere focused on personal and professional growth.QualificationsBachelor's degree in Mechanical Engineering or equivalent experience.At least 3 years of experience in product design, particularly in high-end consumer electronics.Proficiency in Creo or similar 3D CAD software.Strong understanding of designing plastic injection molded parts, stamped metals, die-cast components, and machined parts.

Join Axon and Make a Difference.At Axon, we are committed to our mission of protecting life. We tackle society's most pressing safety and justice challenges through our innovative ecosystem of devices and cloud software. We foster collaboration and connection, valuing diverse perspectives from our customers, communities, and each other.Life at Axon is dynamic, demanding, and purposeful. Here, you will take ownership and instigate meaningful change while continuously developing your skills within a mission-driven environment that values your contributions.Your ImpactAs a key member of the TASER Electrical Engineering team, you will lead and participate in the hands-on design, development, and testing of advanced electronics critical to Axon TASER Products. Your strong technical expertise and engineering judgment will be essential in delivering high-quality designs that adhere to stringent product and regulatory standards. In this role, you will manage significant aspects of circuit and subsystem designs, make critical system-level architectural decisions, and collaborate with cross-functional teams across product engineering, firmware, new product introduction, manufacturing, and quality assurance. Additionally, you will mentor junior engineers and play a vital role in elevating the technical capabilities of the team while advancing your own leadership skills. Join our dedicated engineering team in overcoming complex challenges and delivering technologies that positively influence Law Enforcement, Public Safety, and their communities.Your Day-to-DayResearch, propose, and develop cutting-edge circuit designs for products, including TASER energy weapons, TASER-enabled devices, and wirelessly connected TASER products.Design, develop, and validate system circuitry and hardware to meet project objectives.Utilize OrCAD Schematic tools to design embedded mixed-signal electronic circuitry integrating high-voltage power supplies, microcontrollers, display drivers, memory devices, power supplies, batteries, data interfaces, RF transceivers, and other components.Collaborate with PCB designers to oversee layout implementation and review designs for signal integrity, manufacturability, and reliability using Cadence layout tools.Work alongside cross-functional engineering teams, technology partners, and manufacturing teams to ensure product excellence.

Become a Force for Good at Axon.At Axon, our mission is to Protect Life. We are innovators tackling the most urgent safety and justice challenges through our integrated suite of devices and cloud solutions. Collaboration is at the heart of our success; we foster open communication and diverse perspectives from our customers, communities, and one another.Life at Axon is dynamic, demanding, and rewarding. Here, you will have the autonomy to make an impact and drive meaningful change. Embrace continuous growth as you contribute to a mission that truly matters in a company that values you.Your ImpactAs part of our team, you will be instrumental in creating the next generation of essential communication systems for public safety professionals around the globe. In the role of Senior Wireless Software Engineer, you will lead the design and implementation of wireless protocol stacks, transport abstraction layers, and real-time communication systems across our product ecosystem. You will work at the convergence of RF technologies, embedded systems, and cloud-connected software.This is a hands-on technical role with significant architectural influence.Work Location: This role can be based out of Axon's US hubs in Atlanta, Boston, Scottsdale (HQ), San Francisco, or Seattle, and follows a hybrid work schedule. We emphasize in-person collaboration, requiring team members to be onsite 4 days a week from Tuesday through Friday, with the option to work remotely on Mondays unless an approved accommodation is in place. We believe that innovation thrives on connection, and our in-office culture is crafted to enhance teamwork, mentorship, and shared success.Reports to: VP of Software EngineeringDirect Reports: 0What You'll Do:Your responsibilities will include addressing challenging wireless issues our products encounter: transforming research into robust, high-performance PHY/MAC systems; architecting firmware and toolchains that achieve demanding latency, power, and reliability benchmarks; and outlining a wireless roadmap that harmonizes innovation, manufacturability, and real-world performance. You will influence how our devices connect and perform at scale—from laboratory prototypes to deployed fleets—and your work will be evaluated based on real-world performance, not solely theoretical simulations. This role requires a strong understanding of RF principles alongside deep expertise in systems software, placing you at a critical juncture that defines the reliability and trustworthiness of our entire communication platform.Lead design and implementation of key wireless systems