Wearables Prototype Engineer (Hardware + Software)

At Workstream, we are dedicated to transforming the way hourly workers are managed through our comprehensive HR, payroll, and hiring platform. With 2.7 billion hourly workers representing 80% of the global workforce, this demographic has been historically overlooked by technology. Our solutions are designed to empower both businesses and their employees from…

At Workstream, we are on a mission to revolutionize the way hourly workers are managed by creating an all-encompassing HR, payroll, and hiring platform. With 2.7 billion hourly workers representing 80% of the global workforce, this sector has been largely neglected by technology. We are committed to empowering these workers and their employers, ensuring they can thrive in their roles.Our esteemed clientele includes renowned brands across various industries, such as Burger King, Carl's Jr./Hardee's, IHOP, KFC, and Culvers. As a rapidly growing Series B company, we are expanding our product offerings to fulfill our ambitious vision, backed by prestigious investors including Founders Fund, BOND, and Coatue.Join Our TeamWe are seeking an inquisitive and hands-on Wearables Prototype Engineer Intern to assist in the design, development, and testing of innovative wearable device concepts that integrate seamlessly with Workstream's platform.In this exciting role, you will collaborate with seasoned engineers and product teams to quickly create prototypes of wearable solutions, advancing from initial ideas to functional demonstrations. This is a unique opportunity to gain firsthand experience in both hardware and software development, contributing to impactful projects that explore the potential of wearable technology to enhance productivity and communication for the hourly workforce.This position is perfect for individuals who thrive in fast-paced startup environments and are passionate about building, experimenting, and learning through hands-on experiences.

Company OverviewMainspring Energy is at the forefront of transforming power generation with our groundbreaking local power generation technology, the Mainspring Linear Generator. Leading commercial, industrial, and utility organizations are increasingly choosing Mainspring over traditional solutions like engines, turbines, and fuel cells to efficiently and reliably provide local power for applications such as EV charging, commercial facilities, data centers, and large-scale grid operations.The Mainspring Linear Generator boasts remarkable fuel flexibility, adapts effortlessly to demand fluctuations, and employs a flameless reaction process that results in near-zero NOx emissions. Supported by esteemed investors including Khosla Ventures, Bill Gates, American Electric Power, Lightrock, and General Catalyst, Mainspring designs, manufactures, and delivers its innovative products to a diverse clientele across the U.S., with plans for rapid international expansion.Guided by our vision for an affordable, reliable, net-zero carbon grid, Mainspring is rapidly scaling within the $816 billion global electricity equipment market. We are actively seeking exceptional talent to meet the increasing demand from our customers worldwide. We embrace a wide array of backgrounds, experiences, and talents to drive fresh perspectives and continuous innovation for our clients.We value relationships with individuals who align with our core principles:Pragmatic Optimism: The ambition and creativity required to build a world-class power generation category must be coupled with practical problem-solving skills. We view challenges as opportunities for growth.Excellence without Ego: Our commitment to delivering an unparalleled customer experience—from sales to deployment and service—mirrors the technical rigor we apply in our product development. We aim for excellence while maintaining the humility to address our challenges collectively and as individuals.Proactive Collaboration: The integrated and multidisciplinary nature of our work at Mainspring necessitates intentional collaboration with individuals who offer diverse skills, perspectives, and priorities. Our culture promotes inclusion and respect in all interactions, both internally and with our partners and customers.

Company Overview Mainspring Energy is at the forefront of transforming power generation with our cutting-edge Mainspring Linear Generator, known for its unparalleled flexibility and adaptability. Leading figures in the commercial, industrial, and utility sectors are opting for Mainspring's technology over traditional power sources such as engines, turbines, and fuel cells, to swiftly and reliably provide local power solutions for applications including EV charging, commercial facilities, data centers, and large-scale grid operations. The Mainspring Linear Generator is designed to be fuel flexible, capable of adjusting output in response to demand, and utilizes a flameless reaction that produces near-zero NOx emissions. Supported by prestigious investors including Khosla Ventures, Bill Gates, American Electric Power, Lightrock, and General Catalyst, Mainspring is committed to designing, manufacturing, and delivering innovative products to customers across the U.S., with plans for rapid international expansion. Driven by our vision of an affordable, reliable, net-zero carbon energy grid, Mainspring is rapidly establishing itself within the $816 billion global electricity equipment market. We are in search of talented individuals who can contribute to our mission and help us meet the increasing demands of our customers around the world. We value a diversity of backgrounds, experiences, and skills to foster fresh perspectives and innovation. We believe in building relationships with individuals who share our core values: Pragmatic Optimism: The ambition to build a new category of world-class power generation is fueled by a blend of optimism and creativity, coupled with practical problem-solving skills to efficiently address challenges. Excellence without Ego: Our commitment to delivering the best customer experience drives us to apply our deep technical expertise with humility, striving for excellence while acknowledging our collective and individual challenges. Proactive Collaboration: Our success hinges on the integration of diverse skills and perspectives, and we cultivate a culture of inclusion and respect that extends to all our partners and customers. For more information, please visit www.mainspringenergy.com.

Why Choose LeoLabs? At LeoLabs, we are pioneering the creation of a comprehensive operational map of space activities. Leveraging our proprietary global radar network and advanced AI analytics platform, we gather millions of measurements each day on over 25,000 objects in low Earth orbit (LEO). Our radar-assisted intelligence safeguards billions in assets, observes adversarial activities, and guarantees secure operations for both commercial and governmental missions. We are not merely developing technology; we are reshaping global security, safety, and transparency in space. As orbital activities increase and threats become more intricate, LeoLabs stands as a reliable ally for Space Domain Awareness, Space Traffic Management, and Satellite Operations, serving elite space operators and defense entities. If you are eager to tackle mission-critical challenges at the forefront of aerospace, national security, and AI, your journey starts here.

Join our innovative team at Robinhood as a Backend Software Engineer, where you will play a pivotal role in building scalable systems that empower our users to take control of their financial futures. We are looking for passionate engineers who thrive in a fast-paced environment and are excited about leveraging technology to create impactful solutions.

Be a Part of the Financial Revolution.Our vision is to democratize finance for everyone. An estimated $124 trillion of assets will transition to younger generations over the next two decades, marking the largest wealth transfer in history. If you are eager to be at the forefront of this monumental cultural and financial transformation, we invite you to continue reading.About Our Team and Your RoleWe are assembling an elite team committed to leveraging cutting-edge technologies to tackle the world’s most pressing financial challenges. We seek innovative thinkers, adept problem-solvers, and builders who are driven to make a significant impact. Robinhood is not a place for mediocrity; it is where ambitious individuals achieve the pinnacle of their careers. Our culture is characterized by high-performance, rapid pace, and a commitment to ethics in all that we do. The stakes are high, but so are the rewards.The Crypto Custody team is dedicated to creating a state-of-the-art custody platform that supports both custodial and non-custodial blockchain products, ensuring exceptional security and reliability. We manage Robinhood’s foundational crypto custody infrastructure, directly contributing to the launch of new products, asset diversification, and global expansion.As a Staff Software Engineer, you will be responsible for designing and scaling secure systems for digital asset custody, transforming manual processes into automated, policy-driven solutions. You will lead critical custody initiatives, enhance system reliability and compliance, and work collaboratively with cross-functional teams to ensure the secure management of digital assets on a large scale.This position is primarily based in our New York, NY office, with a requirement for in-person attendance at least three days a week.At Robinhood, we recognize the value of in-person collaboration in accelerating progress, inspiring innovation, and fostering community. Our office environment is intentional, invigorating, and tailored to support high-performing teams.

Be a Part of the Financial Revolution.At Robinhood, our goal is to make finance accessible for everyone. With an anticipated transfer of $124 trillion in wealth to younger generations in the coming decades, we are poised at the forefront of this transformative moment. If you're eager to engage in this monumental cultural and financial transition, we want to hear from you.About the Team and Your RoleOur team is comprised of leading innovators, utilizing cutting-edge technology to tackle the most significant challenges in the financial sector. We seek courageous thinkers and adept problem-solvers—builders who are committed to making a meaningful difference. Robinhood is a dynamic environment where ambitious individuals can excel and achieve remarkable success. Our high-performing and fast-paced team prioritizes ethics in all endeavors, setting high expectations alongside substantial rewards.As a Backend Software Engineer, you will take ownership of backend services, infrastructure, and data systems integral to Robinhood's core financial offerings. This role involves addressing complex scalability issues while deepening your understanding of U.S. financial systems and creating a direct impact on products that millions rely on.The Brokerage team focuses on facilitating the launch of new features, broadening our financial services, and welcoming millions more into the financial ecosystem. This team manages essential services that underpin trading and brokerage infrastructure, collaborating closely with engineering, product, and operations teams throughout Robinhood.The Incentives team drives user growth and engagement through strategic incentives and platform capabilities. One sub-team concentrates on boosting net deposits through various levers, while the other develops a centralized, scalable platform to deliver personalized rewards company-wide.The Identity team safeguards both Robinhood and its users by preventing fraud and ensuring compliance with regulations. They manage vital systems for identity verification, KYC, and fraud prevention across all products, working closely with teams like Data Science, Brokerage, and others.

About Sprinter Health:At Sprinter Health, we are dedicated to transforming the way individuals access healthcare by delivering services directly to their homes. Nearly 30% of patients in the U.S. avoid preventive or chronic care due to barriers in reaching healthcare facilities. For many, the emergency room becomes their first interaction with the healthcare system, resulting in over $300 billion in unnecessary costs annually.Leveraging cutting-edge technologies that drive leading marketplace and last-mile delivery platforms, we bring care directly to those who need it most. To date, we have assisted more than 2 million patients across 22 states, conducted over 130,000 in-home visits, and maintained a 92 Net Promoter Score (NPS). Our dynamic team of clinicians, technologists, and operators has successfully raised over $125 million from esteemed investors such as a16z, General Catalyst, GV, and Accel, positioning us with a robust multi-year runway.About The Role:We are seeking an innovative Senior Software Engineer with a passion for agentic AI and a minimum of 5 years of comprehensive engineering experience. You will play a crucial role as a founding engineer on our new AI-focused incubator teams. Our objective is to address the challenges faced by individuals who fall through the cracks of the current healthcare system, and your expertise in AI will be instrumental in bridging those gaps.*If you thrive in startup environments and love creating from scratch (0 → 1),* we would love to connect with you. While our core products are already thriving, we continuously seek innovative ideas to enhance healthcare access. As part of our incubator, you will enjoy the freedom of a startup environment coupled with the significant advantage of established customer relationships with six of the ten largest U.S. health plans and access to extensive resources.Office Location:We operate on a hybrid work model with offices located in both San Francisco and Menlo Park. We prioritize work-life balance and recognize the necessity for flexibility at times.What You Bring:Software Engineering: At least 5 years of diverse, full-stack or backend-focused experience.Startup Culture: A minimum of 1 year working in a seed-stage environment, contributing to innovative projects.

Join Our Visionary TeamAt Lirvana Labs, we are pioneering the future of personalized education through innovative technology. As a VC-backed ed-tech startup, we are committed to transforming learning experiences with the power of AI. Supported by renowned investors like Kapor Capital, and partnered with esteemed organizations such as Sesame Workshop and Stanford University, we are on a mission to make impactful educational tools accessible to all.Our flagship product features Yeti Confetti Kids, a dynamic AI tutor that customizes learning journeys, alongside the Teacher Co-Pilot Portal, which provides educators with actionable insights and streamlined functionalities. We are dedicated to advancing our literacy, math, and social-emotional learning programs to reach even more learners across the globe.About the PositionWe are seeking an experienced Senior Frontend Software Engineer with an expertise in UI/UX development to create high-quality, scalable applications for web and mobile platforms. You will significantly influence the user experience and the foundational architecture of our products. If you are passionate about leveraging Flutter, React, and crafting exceptional applications, we want to connect with you.Key ResponsibilitiesDesign & Develop: Architect and implement scalable frontend applications using Flutter (Dart) and/or React. Deliver robust features across web and optional iOS/Android platforms.Deployment: Oversee the deployment process to the web and manage iOS/Android deployment using Flutter. Ensure efficient CI/CD pipelines and scalable release workflows.Mentorship & Leadership: Take charge of significant features from conception to deployment and guide junior engineers through code reviews, pair programming, and technical mentorship.Innovate & Enhance: Propel technical excellence by continuously improving our development practices and exploring new technologies.

Company OverviewMainspring Energy is at the forefront of transforming power generation with the innovative Mainspring Linear Generator, a highly flexible and versatile local power generation technology. Leaders in the commercial, industrial, and utility sectors are selecting Mainspring over traditional methods such as engines, turbines, and fuel cells to efficiently and reliably provide local power for applications including EV charging, commercial facilities, data centers, and grid-scale operations. Our Linear Generator is fuel flexible, responsive to demand fluctuations, and operates with a flameless reaction that results in near-zero NOx emissions.Supported by esteemed investors such as Khosla Ventures, Bill Gates, American Electric Power, Lightrock, and General Catalyst, Mainspring designs, manufactures, and delivers its solutions to customers throughout the U.S. and is rapidly expanding its footprint internationally.Driven by our vision of an affordable, reliable, and net-zero carbon energy grid, Mainspring is experiencing robust growth within the $816 billion global electricity equipment market. We are seeking top-tier talent to accommodate our expanding customer base worldwide. We embrace a diverse range of backgrounds, experiences, and skills to foster fresh perspectives and continuous innovation for our clients.We seek to build connections with individuals who resonate with our core values:Pragmatic Optimism. The development of a groundbreaking category of power generation requires a blend of ambitious optimism and the practicality to efficiently address challenges, viewing them as opportunities for advancement.Excellence without Ego. We are committed to delivering an exceptional customer experience across all stages, from sales to deployment and service, while maintaining deep technical rigor in creating and delivering our world-class products. We strive for excellence and operate as leaders who humbly acknowledge our collective and individual challenges.Proactive Collaboration. The interdisciplinary nature of Mainspring's work necessitates actively engaging with others who offer varied skills, perspectives, and priorities, fostering an inclusive and respectful culture that extends to our partners and clients.For more information, please visit www.mainspringenergy.com.

Are you ready to revolutionize molecular diagnostics?Join a passionate team of innovators dedicated to transforming healthcare. At BillionToOne, we have established a groundbreaking, publicly traded company on Nasdaq, where transparency fosters trust, collaboration leads to breakthroughs, and every contribution advances our mission to make impactful diagnostics accessible to everyone. Rather than seeking mere incremental improvements, we create products that are ten times better than existing solutions.Our diverse team of scientists, engineers, sales experts, and visionaries is united in an unwavering commitment to enhance the standards in prenatal and cancer diagnostics. Here, cutting-edge science merges with human compassion, and every innovation you contribute alleviates the uncertainty surrounding critical medical moments.If you are fueled by purpose, inspired by innovation, and eager to help shape the future of scalable precision medicine, this is the place for you.We are currently seeking a high-performing Senior Software Engineer to join our dynamic software engineering team. At BillionToOne, our software engineers collaborate with clinicians, computational biologists, and fellow engineers to effectively scale personalized genomic medicine for millions of patients. If you have experience in full life-cycle development, enjoy seeing your work positively impact colleagues and patients, and thrive in a fast-paced entrepreneurial environment, this opportunity is for you. In this role, your influence can extend through both small tools and large product development. This position is hybrid (onsite 2-3 days/week).Potential projects include:Creating a seamless digital experience to ensure clinicians and patients across various care centers and socioeconomic backgrounds can access BillionToOne’s complex genetic testing.Transforming labor-intensive and error-prone paper-based workflows at busy OBGYN clinics.Facilitating improved transfer of care through portable electronic medical records.Enhancing joyful experiences during pregnancy.Technologies utilized include: Python, Django, Postgres, React, Typescript, AWS, Salesforce, and emerging AI-assisted coding environments (e.g., Cursor, GitHub Copilot, Claude Code).Responsibilities:Build and maintain robust applications and systems using React, Typescript...

Prophet Security creates automation tools designed for security teams. The company’s platform analyzes security alerts, builds and executes investigative plans, and delivers actionable findings. Security analysts use these results and provide feedback, helping improve automation over time. Prophet Security is led by a founding team with over 30 years of cybersecurity experience from organizations including Abnormal Security, Expel, Mandiant, McAfee, Oracle, Red Canary, Red Hat, Riverbed, and Symantec. Headquarters are in Menlo Park, with a hybrid work model. Role overview This Senior Full Stack Software Engineer role focuses on building the user-facing elements of Prophet Security’s AI SOC platform. As an early engineering team member, there is significant influence over product direction, technical architecture, and team culture. The initial emphasis is on frontend development, designing and implementing interfaces that security analysts use to investigate alerts, review AI-generated findings, and respond to threats. Over time, responsibilities can expand to backend systems, such as APIs, data pipelines, integrations, and services supporting the platform. What you will do Work with design, product, and backend engineers to deliver features for security analysts Collaborate with the security operations team and interact directly with customers to understand practical needs Shape product direction, technical architecture, and engineering practices as part of the early team Requirements Strong, recent experience in modern frontend development Interest in both frontend and backend engineering Comfort working collaboratively in a startup setting Location This position is based in Menlo Park and follows a hybrid work schedule.

Join Sprinter Health as a pioneering Senior Software Engineer in our innovative AI incubator team. Our mission is to revolutionize healthcare access by bringing services directly to patients' homes, addressing the critical gap that leads to over $300 billion in avoidable costs annually due to missed preventive care.At Sprinter Health, we leverage cutting-edge technologies from leading marketplace platforms to deliver healthcare where it’s needed most. We are proud to have served over 2 million patients across 22 states and conducted over 130,000 in-home visits, maintaining an impressive 92 NPS. Backed by top investors such as a16z, General Catalyst, GV, and Accel, we are set for continued growth and innovation.About the Role: We seek an entrepreneurial spirit who has at least 5 years of software engineering experience, particularly with an interest in agentic AI. As one of the founding engineers in our AI incubator, you will have the unique opportunity to shape solutions that bridge the gaps in our healthcare system.If you thrive in a 0 to 1 environment and are eager to contribute to expanding healthcare access, we want to connect with you. Our incubator functions with the agility of a startup while benefiting from direct relationships with six of the ten largest US health plans.Work Location: We operate as a hybrid company with offices in San Francisco and Menlo Park, offering flexibility to ensure a healthy work-life balance.

Join BillionToOne as a Senior Software Engineer focused on enhancing digital experiences. In this role, you will leverage your expertise in software development to design, implement, and optimize innovative solutions that improve user engagement and satisfaction. Collaborate with cross-functional teams to create seamless digital interactions that align with our mission to revolutionize healthcare technology.

Location: Menlo Park, CAEmployment Type: Full-TimeCompensation: Competitive salary + significant milestone-based equityAbout Glade.aiGlade.ai is revolutionizing AI-driven automation to empower service industries to operate with enhanced efficiency and speed. Our comprehensive platform automates workflows, simplifies processes, and facilitates team scalability, allowing sectors such as legal, insurance, and professional services to prioritize delivering exceptional value to their clients.The OpportunityWe are seeking an experienced Staff Software Engineer to take on a pivotal role as a technical leader and mentor within our expanding product engineering team. This is an extraordinary chance to influence the architecture, engineering culture, and product trajectory of a fast-growing company from its inception.In this role, you will guide a team of software engineers, fostering innovation and ensuring the delivery of high-impact, scalable, and elegant solutions.What You’ll DoCollaborate with Product, Design, and other stakeholders to identify customer requirements and devise effective solutions.Lead the design and execution of significant product and platform modifications across Glade’s software infrastructure.Elevate the standards of the engineering organization by offering technical guidance and mentorship, developing tooling, and enhancing engineering workflows.Navigate seamlessly through the entire product lifecycle, from design and implementation to production.What We’re Looking For8+ years of experience in software engineering, with substantial experience in leadership or principal roles.Strong grasp of engineering principles, industry standards, and emerging technologies, particularly within our tech stack: TypeScript, React, Node.js, PostgreSQL.Proven experience in constructing and refining production systems to support new product functionalities and accommodate growing demand.Experience in developing or prototyping LLM-powered workflows using inference providers like OpenAI.A strong commitment to enhancing the end user experience and a passion for creating products that address customer needs.A humble disposition, eagerness to learn, and a collaborative spirit.

Be a Part of Shaping the Future of Finance.At Robinhood, our mission is to democratize finance for everyone. With an estimated $124 trillion set to be transferred to younger generations in the coming decades, you have the chance to be at the forefront of this monumental shift. If you're eager to make a significant impact in this evolving financial landscape, we want you to join us.About the Team & RoleWe are assembling a distinguished team dedicated to applying innovative technologies to tackle the most pressing challenges in finance. We seek visionary thinkers, adept problem solvers, and impactful builders. Robinhood is not for the complacent; it’s a place where ambitious individuals excel in their careers. Our Growth Engineering team focuses on developing systems that facilitate new customer acquisition through SEO, paid marketing, and user incentives. We collaborate closely with Product, Data Science, Marketing, and Technology to enhance conversion rates and boost funded accounts. This newly established team presents a unique opportunity to influence technical foundations and achieve quantifiable growth results!As an Engineering Manager, you will steer the technical direction and execution strategy across multiple growth initiatives. Collaborating with Product teams, you will define a targeted roadmap, ensure the delivery of robust scalable systems, and cultivate a strong team culture centered on accountability and results. Your contributions will play a vital role in advancing Robinhood's growth strategy both domestically and internationally.This position is based in our Menlo Park, CA office, with in-person attendance required at least four days per week. We believe that in-person collaboration accelerates innovation and fosters community. Our office environment is designed to be energizing and fully supportive of high-performing teams.

Workstream is a purpose-driven technology firm dedicated to creating a comprehensive HR, payroll, and hiring platform tailored for the hourly workforce. With 2.7 billion hourly workers—representing 80% of the global workforce—this segment has been largely overlooked by technological advancements, and we believe it deserves better solutions. From our inception, Workstream has been designed with the needs of the hourly workforce in mind, empowering businesses and their employees to thrive.We proudly serve notable clients across various sectors, including well-known brands like Burger King, Carl's Jr./Hardee's, IHOP, KFC, and Culvers. As a rapidly growing Series B company, we are swiftly expanding our product offerings to fulfill our ambitious vision. Our endeavors are supported by prestigious investors and industry leaders such as Founders Fund, BOND, and Coatue.Our diverse team hails from esteemed institutions like UC Berkeley, Cornell, SJTU, Cambridge, and NUS, with rich industry experience from companies such as Tencent, Alibaba, Amazon, and ByteDance. Our engineering team is composed of passionate, talented engineers committed to innovating cloud technology solutions that empower local businesses to flourish and better serve the deskless workforce in their communities. We are currently looking for a skilled Senior Software Engineer to join our expanding engineering team.

Mainspring Energy seeks a Principal Cloud Platform Software Engineer based in Menlo Park, CA. The role centers on building and refining cloud-based platforms that power the company's products and services. Key responsibilities Design, develop, and improve core components of the cloud platform Collaborate with engineering, product, and operations teams on technical solutions Create and deliver systems that prioritize scalability and security within the cloud infrastructure Collaboration Frequent teamwork with colleagues from various backgrounds is essential. The goal is to ensure the platform aligns with both business objectives and technical requirements.

Join Speechify as a Senior Software Engineer specializing in Windows and Desktop Applications. In this role, you will leverage your extensive experience to design, develop, and maintain high-quality software solutions that enhance the user experience. You will work closely with cross-functional teams to deliver innovative features that meet our users' needs.