Senior JavaScript Engineer

Join StemXpert as a Senior JavaScript Engineer and be a key player in our innovative team! In this role, you will design and implement cutting-edge web applications that enhance user experiences and drive our mission forward. We are looking for a passionate engineer who thrives in a fast-paced environment and is eager to tackle complex challenges.Your expertise in JavaScript frameworks and libraries will be instrumental as you collaborate with cross-functional teams to deliver high-quality software solutions. If you are ready to take your career to the next level and make a significant impact, we want to hear from you!

Mark43 is authorized to hire across Canada, the UK, and in 36 U.S. states, including Alabama, Arizona, California (excluding San Francisco), Colorado, Connecticut, Washington D.C., Florida, Georgia, Iowa, Idaho, Illinois, Indiana, Kansas, Massachusetts, Maryland, Maine, Michigan, Minnesota, Missouri, North Carolina, Nebraska, New Hampshire, New Jersey, New Mexico, New York, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, Tennessee, Texas, Utah, Virginia, Vermont, Washington, Wisconsin, and West Virginia. Prior to applying for a remote role, please ensure that you are able to perform the position in one of the states listed above. Note that state locations and specifics may change as our hiring needs evolve. Applicants must have authorization to work for any employer in the country where the role is being offered. Unfortunately, we cannot sponsor or take over sponsorship of an employment visa at this time.At Mark43, our mission is to empower communities and their governments through innovative technologies that enhance safety and quality of life for all. We create powerful, scalable, and elegant software that sets a new benchmark for the tools our first responders depend on. Our diverse user base inspires us to embrace different perspectives and experiences within our team. We are on the lookout for experienced and creative front-end engineers who have successfully shipped products at an enterprise scale and released commercial software to enterprise clients. Join us in building the next generation of cloud-based public safety software. As a senior member of the Mark43 engineering team, you'll own products and features from inception to deployment, becoming a trusted knowledge resource for your colleagues. You will develop robust solutions to our unique challenges related to scale, security, and reliability. We actively utilize technologies such as Java, React, SQL, Redis, and Elasticsearch, and we encourage participation in the open-source community. Here, you'll have the autonomy to implement your own solutions and make a significant impact on our product.

Join Our Team as a Senior Frontend EngineerWe are seeking a talented Senior Frontend Engineer to become a vital part of our innovative team in Boston. This role provides a unique opportunity for a passionate and skilled engineer to enhance their career with an industry leader.Position Overview: You will be responsible for developing high-quality user interfaces, ensuring optimal performance and responsiveness of applications, and collaborating with cross-functional teams to define, design, and implement new features.

At Later, we redefine influencer marketing by harnessing the power of genuine creator relationships and cutting-edge technology. Our AI-driven platform, backed by over a decade of proprietary data—including billions of social interactions and more than $2.4 billion in verified influencer-driven purchases—provides brands the confidence to craft unforgettable campaigns. With our expert guidance, brands can navigate the complexities of influencer marketing to maximize their impact on awareness, engagement, and revenue. Trusted by industry leaders like Nike, Wayfair, Unilever, and Southwest Airlines, Later seamlessly blends creativity with performance to ensure that every campaign not only looks exceptional but also delivers tangible results. Discover more at later.com.About the role:The Senior Software Engineer will play a pivotal role in driving significant projects, implementing impactful features, and upholding our high engineering standards. You will tackle complex challenges, collaborate across various teams, and mentor junior engineers while continually enhancing our codebases and promoting a culture of technical excellence. With profound expertise in contemporary software development and Agile methodologies, you'll influence product velocity and engineering culture.Your Responsibilities:Strategic LeadershipDefine, plan, and lead the delivery of extensive features and roadmap initiatives.Clarify and refine requirements among stakeholders in a dynamic environment.Navigate ambiguous requirements and divergent interests to deliver features that excite users.Contribute to long-term architectural planning and system design.Technical ExecutionLead the resolution of complex technical challenges across teams and production environments.Continuously improve code quality, system performance, and engineering practices.

Merlin Labs seeks a Senior DevOps Engineer to join the team in Boston. This role focuses on building stronger cloud infrastructure and refining deployment workflows. The position involves close collaboration with teams across the organization to ensure systems run reliably and efficiently at scale. Key responsibilities Maintain and enhance cloud infrastructure for stability and performance Automate deployment and management tasks to streamline operations Work with engineering and other departments to develop scalable solutions Advance continuous integration and delivery (CI/CD) practices Location This position is based in Boston.

Join Air Space IntelligenceAt ASI, we harness cutting-edge technology to empower critical decision-making across diverse sectors such as aviation, defense, energy, and vital infrastructure. Supported by leading investors like Andreessen Horowitz, Spark Capital, and Renegade Partners, ASI is committed to delivering unparalleled operational decision superiority, transforming extensive analysis into rapid action. We are at the forefront of innovation, redefining the boundaries of what's achievable.Your RoleAs a valued member of our product engineering team, you will create dynamic user interfaces that facilitate mission-critical operations, enabling users to track and forecast flight paths within intricate, large-scale air traffic systems. Collaborating closely with our design team, you will develop high-performance, map-driven web applications that empower users to make instantaneous decisions based on rich, geospatial data.Our ExpectationsExpertise in JavaScript/TypeScript, React, and CSS.Experience in developing sophisticated, map-centric web applications using Mapbox, Maplibre, or Google Maps, emphasizing real-time rendering of multiple interactive features and overlays.Familiarity with WebGL, WebGPU, or ThreeJS for optimized graphics rendering, as well as WebAssembly (WASM) to boost application performance.Proactive problem-solving skills with a strong bias for action.Ability to write clean, efficient, and maintainable code.Meticulous attention to detail and a commitment to delivering exceptional user experiences.Skilled in utilizing modern LLM tools to expedite development processes and enhance code quality.Our Hiring PhilosophyWe view the interview process as a collaborative experience rather than a mere evaluation. Our goal is to simulate the dynamics of working together, ensuring the interview process revolves around you.

Join OpenGov as a Senior Software Engineer and become part of a dynamic team dedicated to transforming how governments operate. In this role, you will lead the design and development of innovative software solutions that empower public sector organizations to enhance transparency and efficiency.

Toast, Inc. is seeking a Senior Solutions Engineer in Boston, MA. This position centers on creating technical solutions that help restaurants improve their operations and guest experiences. The Senior Solutions Engineer works directly with clients and partners across the company to understand unique challenges and design effective responses. Role overview This role focuses on applying technical knowledge to real-world restaurant needs. The Senior Solutions Engineer collaborates with both clients and internal teams to identify requirements and deliver solutions that support business goals. Collaboration Work closely with clients to understand their operational needs Partner with cross-functional teams to design and implement solutions Impact The work directly supports restaurant success and helps enhance the customer experience through tailored technology and thoughtful problem-solving.

Join DigitalOcean as a Senior Engineer I in Observability, where you will play a crucial role in enhancing our platform's visibility and performance. You will work closely with cross-functional teams to build and optimize observability tools, ensuring that our infrastructure runs smoothly and efficiently. This is an opportunity to leverage your technical expertise to drive innovation and improve our customer experience.

Later stands at the forefront of influencer marketing, empowering brands to craft unforgettable campaigns with confidence. By merging authentic creator relationships, data-driven insights, and professional guidance, Later alleviates the uncertainties that often accompany significant marketing investments.Our platform, fueled by advanced AI and over a decade’s worth of proprietary data—including billions of social interactions and more than $2.4 billion in verified influencer-driven purchases—enables teams to gain clarity on strategies before execution.With a commitment to providing reliable insights and expert support, Later simplifies influencer marketing, allowing brands to select optimal creators, manage comprehensive campaigns, and foster substantial growth in brand awareness, engagement, and revenue. Our trusted partnerships include renowned enterprises such as Nike, Wayfair, Unilever, and Southwest Airlines, as we blend creativity with effectiveness to ensure campaigns not only look impressive but also yield tangible results. Discover more at later.com.About this Position:As a Senior Security Engineer at Later, you will be pivotal in fortifying and enhancing the security framework that supports our platform. This position fuses extensive security acumen with hands-on engineering, emphasizing identity and access management, authentication systems, and secure development practices.You will collaborate intimately with Engineering, Infrastructure, and Product teams to integrate security into our CI/CD pipelines, internal platforms, and client-facing systems—empowering teams to innovate rapidly while ensuring the safety of our systems, data, and users. This role is ideal for an impactful individual contributor who possesses a defender’s mindset, builds with the precision of a software engineer, and leads through influence.Key Responsibilities:StrategyContinuously assess and enhance Later’s security posture across applications, infrastructure, and development workflows.Establish and enforce scalable security standards, guidelines, and best practices that facilitate compliance through automated and auditable solutions.Collaborate with Engineering and Product leadership to synchronize security priorities with business goals and project timelines.

Join Formlabs, a pioneering 3D printing company, as a Senior Electrical Engineer. In this role, you will design innovative electrical systems for our cutting-edge products. Collaborate with a talented team to develop solutions that push the boundaries of technology.

Join our dynamic team as an Engineer/Senior Engineer focused on Perception Capabilities, where you will have the opportunity to develop innovative software products leveraging advanced computer vision and deep learning technologies. Your expertise in detection, classification, segmentation, or tracking will play a crucial role in creating impactful solutions in a production-oriented environment.We value curiosity and motivation, and we encourage you to learn from our experienced team. If you enjoy tackling complex technical challenges, asking insightful questions, and collaborating to produce top-notch software, this is the place for you.Your contributions will directly impact the perception stack of our self-driving vehicles, enhancing safety-critical applications in an open-world context.

At WHOOP, we are driven by a mission to enhance human performance and prolong healthspan. Our innovative platform empowers individuals to achieve peak performance through a profound understanding of their bodies and daily habits. We process vast amounts of real-time data from users focused on health and wellness, as well as the world’s elite athletes and sports teams, necessitating a highly reliable and fault-tolerant product.Join our Connectivity Software Team, where we create the essential connection between WHOOP hardware, the iOS application, and the cloud infrastructure. As a Senior iOS Engineer on this team, you will design and implement software that facilitates seamless communication between WHOOP’s wearable sensors and the mobile platform. Your expertise will help develop and optimize connectivity experiences that are not only robust and efficient but also seamlessly integrated, ensuring a reliable flow of data throughout our ecosystem.

Role Overview Whoop is seeking a Senior Mechanical Engineer focused on apparel and accessories. This position centers on designing, developing, and implementing mechanical solutions that support and improve our product lines. What You Will Do Lead mechanical engineering projects for new and existing apparel and accessory products. Work closely with teams across disciplines to bring technology concepts into production. Ensure all mechanical designs meet quality and performance requirements. Location Boston, MA

Join Axon and Make a Difference.At Axon, our mission is to Protect Life. We are innovators, tackling society’s most pressing safety and justice challenges through our suite of devices and cloud software. Just like our products, we thrive on collaboration, embracing diverse perspectives from our customers, communities, and each other.Your journey at Axon will be fast-paced, fulfilling, and impactful. Here, you'll take charge and foster real change, continually developing your skills as you contribute to a cause that truly matters in an environment where your contributions are valued.Your ImpactAs a Senior member of the Robotics Electrical Engineering team, you will spearhead innovative hands-on design, development, and testing of state-of-the-art electronics vital to AXON Robotics Products. Your vast technical knowledge, comprehensive understanding of engineering methodologies, genuine enthusiasm for technology, and a proactive ownership mentality will be pivotal in crafting exceptional designs that surpass our customers’ rigorous standards. In this role, you will take charge of the design, development, and verification of essential electronic circuits and systems, collaborating with product engineering teams globally. As an electrical engineering authority designing world-class products, your robust technical leadership will inspire and cultivate junior engineering talent through mentorship and collaboration within the teams. Join a dedicated engineering team committed to solving complex challenges and delivering technologies that positively influence Law Enforcement, Public Safety, and their communities.Your Day-to-DayConduct research, propose, and develop cutting-edge circuit designs for Axon Robotics products.Select, design, develop, and verify system circuitry and hardware in alignment with project goals and specifications.Utilize schematic capture tools to design integrated Mixed-Signal electronic circuitry.Collaborate with PCB design engineers to define, plan, implement, and review printed circuit board layouts using Allegro or similar tools.Possess a strong background in selecting new electrical components and managing suppliers to ensure optimal design choices.Work closely with cross-functional engineering teams, technology partners, and manufacturing teams to oversee electronics development from initial concept through to mass production.Lead schematic and layout design inspections to enhance the quality of design releases.

Are you ready to shape the future of engineering?Simpson Gumpertz & Heger (SGH) is a renowned national engineering firm dedicated to providing integrated solutions for our clients' most intricate challenges. We harness our collective expertise, technical knowledge, and industry insights in structures and building enclosures, advanced analysis, performance and code consulting, and applied science and research to offer unparalleled solutions that enhance performance. With a workforce of 800 across the nation, SGH's top-tier teams are constantly pushing the boundaries of innovation.Why choose a career with SGH?At SGH, the path to advancement is paved with curiosity and exploration. Every team member is both a learner and an educator, devoted to personal growth, team development, and industry progress. Together, we are cultivating a culture that never settles for the status quo but always strives for better.Reasons to join SGH:Our Work: Clients rely on us to provide clarity and deliver exceptional solutions for their most challenging projects.Our Team: We are innovative thinkers and supportive colleagues, dedicated to continuous learning and professional development.Our Integrity: We uphold our commitment to honesty and actively contribute to our professions and communities.Our Benefits: We provide a comprehensive compensation and benefits package, including company-sponsored and optional programs aimed at fostering healthy lifestyles, strong relationships, and future success.We seek a passionate problem-solver in engineering.The Consulting Engineer will take on project management responsibilities for small to medium-sized projects, including new design and the evaluation, investigation, and design of repairs for existing structures. You will oversee significant individual projects or multiple projects that necessitate supervision of various staff and client interactions. Maintaining professional relationships and active involvement in relevant associations and committees is crucial. Essential duties include climbing ladders and scaffolding, working at heights, and traveling to diverse job sites via car, train, and air.

Accordion is seeking a Senior Production Support Engineer to help maintain and improve the reliability of production systems. This position is based in one of several major cities, including Atlanta, Boston, Charlotte, Chicago, Dallas, Los Angeles, New York, or San Francisco. Role overview This role focuses on keeping production environments stable and high-performing. The Senior Production Support Engineer will handle complex technical issues, deliver solutions, and monitor system health to prevent disruptions. What you will do Troubleshoot and resolve technical problems affecting live systems Work with cross-functional teams to address incidents and drive improvements Optimize system performance and reliability through careful analysis and proactive measures Provide ongoing maintenance and support for production applications Collaboration and impact This position works closely with teams across Accordion to ensure clients receive dependable service. A proactive mindset and strong technical skills are key to continuously refining support processes and delivering consistent results.

Whoop, Inc. is seeking a Senior Hardware Compliance Engineer based in Boston, MA. This role focuses on ensuring that hardware products meet all relevant compliance and regulatory standards. The position plays a key part in upholding quality and safety across the company’s devices. Role overview The Senior Hardware Compliance Engineer will work closely with product and engineering teams to confirm that each hardware release aligns with required regulations. Attention to detail and a strong understanding of compliance processes are essential for success in this position. What you will do Oversee compliance and regulatory requirements for hardware products Support efforts to maintain high standards of quality and safety Contribute expertise to help guide product teams through certification processes Requirements Experience with hardware compliance and regulatory standards Strong commitment to quality and safety in product development

At Klaviyo, we celebrate the diverse backgrounds, experiences, and perspectives that each team member brings to our vibrant workplace. We believe that everyone deserves an equal opportunity to succeed, and we value the unique insights that individuals contribute beyond traditional qualifications. If you find that you closely match the criteria but not perfectly, we encourage you to apply. Interested in discovering more about life at Klaviyo? Visit klaviyo.com/careers to see how we empower creators to take charge of their future.At Klaviyo, we envision a future where software transcends traditional productivity tools, evolving into intelligent systems that autonomously optimize based on performance metrics. Our platform serves as a crucial bridge between businesses and their consumers, boasting over 167,000 customers, billions of consumer profiles, and a vast array of customer interactions and conversion data. This presents an exciting opportunity to develop cutting-edge AI and machine learning technologies that will enhance our product offerings and create AI agents capable of autonomously orchestrating marketing strategies and customer experiences across various industries.As a Senior AI Engineer at Klaviyo, you will be instrumental in architecting and developing scalable backend systems and user experiences that drive our AI innovations forward. You will collaborate closely with product managers, machine learning engineers, and data scientists to create substantial real-world impacts at scale. This role is primarily backend-focused, providing opportunities to influence system architecture, asynchronous processing pipelines, distributed systems, and more.