Staff / Senior Staff Full Stack UI Engineer

Location: Onsite in Boulder, COAbout UsAt Foresight Diagnostics, we are pioneering advancements in non-invasive cancer detection through our cutting-edge liquid biopsy technologies that utilize highly sensitive, cell-free DNA. Our proprietary methods, originally conceived at Stanford University, empower earlier detection of smaller tumors, facilitating personalized and effective cancer treatment strategies.Our operations blend molecular biology, bioinformatics, and next-generation sequencing (NGS), transforming scientific innovation into impactful clinical solutions. As we expand, we've established robust laboratory operations and effective cross-functional collaboration, ensuring clinical development and long-term commercial readiness.Foresight Diagnostics fosters a collaborative and accountable work culture where quality, precision, and continuous improvement are integral to our mission. Team members enjoy the chance to contribute to meaningful programs, collaborate with seasoned scientific and operational leaders, and advance professionally within a well-resourced organization dedicated to its mission.Position OverviewWe are looking for a Senior Full Stack Software Engineer who possesses strong Python expertise, frontend skills (preferably in React), and backend experience with relational databases (PostgreSQL is preferred). In this role, you will play a vital part in designing, developing, and maintaining full-stack software solutions that support our research, product development, and clinical testing operations. A solid understanding of NGS laboratory workflows and data management is highly advantageous.This position is onsite in Boulder, CO and does not offer remote or hybrid options. Candidates must either be local to Boulder or willing to relocate before commencing work.Key ResponsibilitiesDesign and develop full-stack applications utilizing React for the frontend and Python for the backend, with an emphasis on database management.Collaborate closely with scientists, laboratory personnel, and business stakeholders to transform complex requirements into practical, production-ready software solutions.Participate in architectural decisions, system design reviews, and sprint planning as part of a collaborative software development team.Ensure that software meets high standards for quality, reliability, and performance.

The Trade Desk is looking for a Senior Full Stack Software Engineer to join the Omnichannel division. This position centers on designing and building software that enhances user experiences across a range of platforms. Projects involve both web applications and integrated advertising technology. Key responsibilities Collaborate with engineering, product, and design teams to deliver applications for the omnichannel platform Develop and maintain software that integrates with The Trade Desk’s advertising technology stack Work on both front-end and back-end systems to support seamless user interactions Locations This role is open in Bellevue, Boston, Boulder, Chicago, Denver, Irvine, Los Angeles, New York, San Francisco, San Jose, Seattle, and Ventura.

Location: Onsite in Boulder, CO. This position requires working at the Boulder office; remote or hybrid work is not available. Candidates should already be local or plan to relocate before starting. Role overview Foresight Diagnostics seeks a Senior Full Stack Software Engineer with strong Python skills and frontend experience in React. The role centers on designing, developing, and maintaining software that supports research, product development, and clinical testing. Experience with relational databases, especially PostgreSQL, is preferred. Familiarity with next-generation sequencing (NGS) laboratory workflows and data management is a plus. What you will do Design and build full-stack applications using React for the frontend and Python for the backend, with an emphasis on relational database storage. Work closely with scientists, lab staff, and business stakeholders to turn complex requirements into practical, production-ready software. Contribute to architectural decisions, participate in system design reviews, and join sprint planning sessions as part of a collaborative software development team. Maintain high standards for software quality and performance. Requirements Expertise in Python development. Frontend proficiency with React. Experience working with relational databases; PostgreSQL preferred. Ability to work onsite in Boulder, CO. Understanding of NGS laboratory workflows and data management is advantageous.

About FreeplayAt Freeplay, we empower software teams to seamlessly launch exceptional AI products. Our platform enables product development teams to effectively test, assess, monitor, and enhance AI in real-world applications. From dynamic startups to Fortune 100 enterprises, our customers leverage Freeplay to refine LLM features, chatbots, and intelligent agents.The Need for FreeplayWhile interacting with ChatGPT may appear straightforward, creating production-grade software utilizing LLMs presents considerable challenges, particularly for teams lacking prior AI expertise. These teams are eager to accelerate their learning journey and prioritize delivering tangible value to their customers.Freeplay simplifies this journey, enabling teams to swiftly and confidently develop and refine production-ready AI features. Our clients appreciate how we help them save time, sidestep costly errors, enhance their offerings, and empower every team member—engineers and non-engineers alike—to collaborate and deliver faster.Discover more about our initiatives on our blog.Your RoleDevelop and Deliver Software: Architect, create, and sustain foundational infrastructure and features across our comprehensive stack—from user-friendly front-end interfaces to robust backend systems that drive our AI testing and evaluation platform.Influence Technical Strategy: Assess and implement technologies, tools, and best practices while profoundly shaping our technical architecture. Participate in strategic decision-making regarding the construction of reliable systems interfacing with AI components.Prioritize User Experience: Keep the end-user at the forefront of all development stages, ensuring our platform is both intuitive and powerful for teams working with AI, while providing a seamless experience across all functionalities.Collaborate with the Founding Team: Partner closely with our founding team to brainstorm, prototype, and deliver innovative solutions that meet user needs and generate value for our customers.Cultivate Engineering Culture: Establish rigorous testing protocols, code reviews, and continuous integration practices to uphold superior quality in production-ready code while minimizing technical debt.

Join Otter LLC as a Full Stack Developer, where you will play a pivotal role in crafting innovative web applications. You will leverage your expertise in both front-end and back-end development to deliver robust, scalable solutions that enhance user experience. Collaborate with cross-functional teams to design, develop, and maintain high-quality software that meets our clients' needs.

Join Otter LLC as a Full Stack Developer Intern specializing in React JS! This internship provides a unique opportunity to work on exciting projects that shape the future of technology.As a Full Stack Developer Intern, you will collaborate with a team of talented engineers, gaining hands-on experience in both front-end and back-end development. You will learn to solve complex problems and contribute to the development of innovative web applications.

As a Senior Software Engineer specializing in Modernization at CampMinder, you will play a pivotal role in transforming our software solutions to meet the evolving needs of our clients. Your expertise will help us enhance the performance, scalability, and user experience of our applications. This position offers the flexibility of working from our Boulder office or remotely, allowing you to contribute to impactful projects from anywhere.

Join Our Team as a Senior Spacecraft Software Engineer (GNSS)At Spire, we are at the forefront of innovation in satellite technology, and we are seeking a talented Spacecraft Software Engineer to enhance our GNSS missions. You will be instrumental in developing and maintaining both flight and ground software, ensuring the seamless operation of our satellite payloads. Your expertise will span multiple system layers, from embedded software to cloud data pipelines, guaranteeing the precise and timely delivery of vital scientific data to our clients.This role is designed for individuals who thrive in an environment that values autonomy, creativity, and a broad technical skill set.

Join CampMinder as a Senior Software Engineer focusing on our core product offerings. We are looking for a talented individual who is passionate about software development and is eager to tackle challenging problems. In this role, you will work closely with a dynamic team of engineers to build innovative solutions that impact our users positively.

Join SciTec, a forward-thinking subsidiary of Firefly Aerospace, where we innovate at the intersection of technology and defense. For over 45 years, we have been at the forefront of supporting U.S. National Security and Defense through cutting-edge remote sensing technologies and advanced algorithms. We develop solutions that empower missile defense, intelligence, surveillance, reconnaissance, and more.Important Notice: All positions at SciTec require U.S. citizenship as we exclusively work on government contracts. We are unable to sponsor work visas, and U.S. citizenship is necessary to obtain a security clearance. Applications from non-citizens will not be considered.We are currently looking for a Senior Front End Software Engineer who is passionate about crafting user-centric web applications. This role focuses on delivering complex, real-time data in an accessible and intuitive manner, ensuring high performance and usability in mission-critical systems.The ideal candidate is an experienced frontend engineer committed to code quality, user experience, and system reliability. You will collaborate closely with backend, platform, and systems engineers to achieve our goals effectively.

About Speechify Speechify builds text-to-speech tools that help people read and learn without barriers. More than 50 million users rely on Speechify to turn PDFs, books, Google Docs, news articles, and websites into audio. The platform helps users read faster, remember more, and access content in new ways. Products include apps for iOS, Android, and Mac, a Chrome extension, and a web app. Recent recognition includes Chrome Extension of the Year by Google and the 2025 Design Award for Inclusivity from Apple. Our Team Speechify has a distributed team of nearly 200 professionals working remotely from around the world. The engineering and research group includes alumni of Amazon, Microsoft, and Google, as well as academic experts from Stanford and startup veterans from Stripe, Vercel, and Bolt. Many team members have also founded their own companies.

SciTec, a dynamic leader in non-traditional defense contracting and a proud subsidiary of Firefly Aerospace, brings over four decades of experience in delivering cutting-edge technologies that bolster U.S. National Security and Defense. Our commitment to innovation has led us to develop advanced remote sensing algorithms, tools, and techniques that enable exceptional data exploitation capabilities essential for missile defense, intelligence, surveillance, reconnaissance, space domain awareness, and aircraft survivability missions.Important Notice: Please note that all SciTec employees must possess U.S. citizenship as we exclusively engage in U.S. government contracts. Unfortunately, we cannot sponsor or assume sponsorship of work visas of any type, and U.S. citizenship is a prerequisite for obtaining and maintaining a security clearance. Candidates who do not meet this requirement will not be considered.We are currently looking for a highly skilled Senior Python Software Engineer to join our team. In this role, you will be responsible for designing, developing, and sustaining high-quality software systems that enhance advanced analysis and data processing workflows. Your focus will be on distributed systems, microservices, and real-time data pipelines, collaborating closely with scientific and technical users in a mission-driven environment.The ideal candidate will be a strong individual contributor with extensive Python expertise, solid software engineering judgment, and the ability to collaborate across disciplines while providing mentorship and influencing technical direction.

About Suite Studios:At Suite Studios, we are a dynamic team dedicated to crafting innovative tools that fuel some of the most exciting creative projects in the world—from Kendrick Lamar’s chart-topping hits to spectacular Super Bowl halftime shows and immersive experiences at the Sphere.Our platform simplifies the process for creative teams to manage, edit, and share extensive media files effortlessly, ensuring seamless collaboration regardless of location. Say goodbye to lengthy downloads and sync complications, and hello to a streamlined workflow that allows artists to stay focused and in the zone.If you are eager to contribute to fast-paced projects with a talented team, we would love for you to join us!

Join our dynamic team at Otter LLC as a Senior Software Engineer. In this key role, you will leverage your extensive expertise in software development to lead innovative projects, mentor junior engineers, and drive technological advancements. Your contributions will be vital in enhancing our software solutions and ensuring they meet the highest standards of quality and performance.We are looking for a passionate individual who thrives in a collaborative environment and is eager to tackle complex challenges. If you are ready to take the next step in your career and make a significant impact, we want to hear from you!

Location: Boulder, CO · Remote with required travelAs a Senior Software Verification and Validation Engineer at Foresight Diagnostics, part of Natera, you will play a crucial role in ensuring that every software component interacting with MRD results is rigorously verified and validated. We seek an expert who possesses a deep understanding of bioinformatics pipelines coupled with the regulatory knowledge to uphold the integrity of test cases, protocols, and traceability matrices.ABOUT FORESIGHT DIAGNOSTICSForesight Diagnostics is at the forefront of molecular diagnostics, specializing in non-invasive cancer detection through advanced cell-free DNA liquid biopsy technologies. Our innovative methods, initially developed at Stanford University, are designed to identify smaller tumors at earlier stages, enabling tailored treatment plans for cancer patients.Positioned at the convergence of molecular biology, bioinformatics, and next-generation sequencing (NGS), we transform rigorous scientific research into solutions that have a real clinical impact. Following our acquisition by Natera, we combine the agility of a startup with the extensive resources of a leader in cell-free DNA testing, making this an exhilarating time to join our mission-driven team.ROLE PURPOSEOur diverse software portfolio includes bioinformatics pipelines, reagent quality control systems, liquid handling automation, LIMS/LIS integrations, and NGS analysis tools. Each component is subject to stringent regulatory requirements under IEC 62304 and ISO 13485, necessitating a meticulous approach to verification and validation that meets clinical diagnostics standards.This senior individual contributor role requires you to establish the V&V strategy for device software, oversee the scheduling and prioritization of testing endeavors, and act as the quality and engineering liaison among bioinformatics, software, and laboratory teams. A solid background in bioinformatics or computational biology is essential, as this position does not allow for on-the-job learning of the domain.

Join our dynamic team at The Trade Desk as a Senior Software Engineer specializing in Observability and Incident Response Management (IRM). In this role, you will be instrumental in developing and enhancing our observability solutions, ensuring seamless incident management processes. Your expertise will contribute to building robust systems that provide insights and drive operational excellence.We are looking for an innovative engineer who thrives in a fast-paced environment and is passionate about creating high-quality software solutions. You will collaborate with cross-functional teams, utilizing cutting-edge technologies to improve our monitoring systems and streamline incident response.

About Atom Computing Atom Computing builds quantum computers using arrays of optically trapped neutral atoms. The team brings together scientists, engineers, and business professionals focused on advancing quantum technology and expanding what’s possible with computation. Role Overview The Senior Software Engineer - Control Systems will design and develop high-performance control systems for Atom Computing’s next-generation quantum computing platforms. This role involves hands-on work with embedded software, real-time systems, GPU and FPGA acceleration, and hardware orchestration. The goal: create deterministic, high-throughput control pipelines that shape the operational and scaling characteristics of quantum processors. What You Will Do Architect and implement control systems for quantum hardware Work across embedded software and real-time systems Integrate GPU and FPGA acceleration into control pipelines Collaborate closely with theory, software, and hardware teams Influence the performance and scalability of quantum processors Who Thrives Here This position suits engineers who enjoy deep systems work, hardware/software co-design, and performance optimization at the intersection of physics and architecture. Location and On-Site Requirements This role is based in Boulder, CO. On-site presence is required at least three days per week to support collaboration with colleagues across theory, software, and hardware teams. Austin, TX is also an option for on-site work.

Join SciTec, a leading subsidiary of Firefly Aerospace, dedicated to delivering cutting-edge technologies that bolster U.S. National Security and Defense. With over 45 years of experience, we support the Department of Defense by developing innovative algorithms and tools for advanced data exploitation in missile defense, intelligence, surveillance, reconnaissance, space domain awareness, and aircraft survivability.Important Notice: All candidates must be U.S. citizens due to the nature of our government contracts. Applications from non-eligible candidates will not be considered.We are looking for a skilled Senior Software Platform Engineer to play a pivotal role in our team, contributing to the development of Next-Generation Missile Warning software. This is an exceptional chance to work with a small, agile company, providing essential capabilities for national defense. You will be part of a fast-paced team responsible for the end-to-end software processing of Overhead Persistent InfraRed (OPIR) sensor data related to Missile Warning, Missile Defense, Battlespace Awareness, and Technical Intelligence.As a key technical contributor on our Platform as a Service (PaaS) team, you will focus on application integration at a customer site. Your primary responsibilities will include building, operating, and refining platform capabilities that empower development teams to reliably deploy, operate, and scale applications in containerized environments.

About the Role As a Senior Software Engineer specializing in Product Security, you will engage in the hands-on design and implementation of security-focused software solutions. Your primary objective will be to integrate security into our development processes from the outset. This includes the incorporation of automated controls like Software Bill of Materials (SBOM) and vulnerability scanning within our CI/CD pipelines. You will also be responsible for maintaining and enhancing our internal libraries and infrastructure related to authentication, authorization, and logging, while aiding in the deployment of monitoring tools for operational services. Additionally, you will work closely with the Principal Security Engineer and various teams to align our systems with NIST 800-171/CMMC requirements. In this impact-driven environment, you will prioritize the delivery of secure code and architecture, with minimal bureaucracy. You may occasionally participate in security discussions with government entities under the guidance of the Principal Security Engineer. Approximately 80-90% of your work will be hands-on, with the remaining time dedicated to collaboration and learning.