Senior Full-Stack Software Engineer

Join our dynamic team at Braze as a Senior Full-Stack Software Engineer! In this pivotal role, you will collaborate with cross-functional teams to design, develop, and implement innovative software solutions. You will leverage your expertise in both front-end and back-end technologies to create seamless user experiences and optimize system performance.

Mithril is on the lookout for exceptional candidates at the Senior to Principal level. The exact level will be determined based on your experience and proven expertise. We value individuals who offer deep technical knowledge, strategic insights, and a history of impactful contributions. Our roles are tailored to fit each candidate’s unique strengths and career aspirations. About Mithril At Mithril, we are revolutionizing how AI companies harness compute power. Our mission is to orchestrate global compute capacity, making it more accessible and optimized for AI workloads. We are constructing a novel public cloud specifically designed for AI, where accessing high-performance compute is as straightforward and reliable as flipping a switch. Originating from a Stanford PhD lab just over a year ago, Mithril has already attracted backing from premier investors, including Sequoia, Lightspeed, Jeff Dean, and Eric Schmidt, among others. With $80 million in funding, we are securing customers and generating revenue. The current machine learning infrastructure is overly complex, forcing engineers to make hard choices about hardware when they should focus on solving major problems and driving innovation. Our Omnicloud Platform addresses this issue by abstracting hardware management and providing seamless access to computational resources, enabling engineers to concentrate on what truly matters—developing transformative AI solutions. We are not only making compute accessible; we are also making it flexible, scalable, and tailored to meet the unique demands of AI. Our infrastructure marketplace provides state-of-the-art hardware without the usual friction, allowing companies to innovate faster and more efficiently. Working at Mithril As a Full Stack Engineer at Mithril, you will play a crucial role in developing the applications and systems that will shape the future of AI. Your responsibilities will include scaling our platform and ensuring a seamless user experience supported by a robust and efficient infrastructure. In a landscape where AI workloads are increasingly complex, crafting reliable and high-performance software is foundational to our mission. The Omnicloud Platform supports cutting-edge AI workloads, managing vast amounts of data while providing a user-friendly interface for developers and researchers. Full Stack Engineers at Mithril design and implement solutions across the entire stack—from creating intuitive front-end interfaces to architecting scalable backend systems. We expect every engineer to approach problems holistically, balancing performance, scalability, and simplicity, while maintaining a strong focus on user experience.

Vivodyne is building advanced tools to accelerate drug discovery and development by working with large-scale, lab-grown human organ tissues. The company combines biology, robotics, and AI to generate multi-omic data from human tissues, aiming to improve the safety and effectiveness of new therapeutics. Vivodyne partners with major pharmaceutical companies and is backed by leading venture funds. Role overview The Senior Full Stack Software Engineer will join the team in San Francisco (Brisbane), CA. This position collaborates closely with Product to build sophisticated, high-performance web applications that support scientific workflows. The stack centers on React and TypeScript for the frontend, FastAPI for backend services, and Postgres for data management. Work includes designing and developing complex, stateful user interfaces, implementing backend features, and delivering end-to-end solutions. The engineer will focus on creating rich, data-driven interfaces that help scientists design experiments and monitor results. Strong interaction design and state management skills are important. Experience as an "AI native" is valued, as the team uses large language models to speed up prototyping and deliver results quickly. This role directly supports Vivodyne's biotech platform for drug discovery and testing, enabling scientists to work with unique datasets and robotic systems. The applications built will be used in partnership with top pharmaceutical companies. Key technologies React (frontend) TypeScript (frontend) FastAPI (backend) Postgres (database) Location San Francisco (Brisbane), California

Join Collective Health as a Lead Full Stack Software Engineer specializing in claims processing. In this pivotal role, you will leverage your expertise to design, develop, and enhance our software solutions that facilitate seamless claims management. Collaborate with cross-functional teams to innovate and implement robust systems that improve efficiency and user experience.

Join Arena IntelligenceAt Arena Intelligence, we are pioneers in assessing the real-world performance of AI models. Founded by esteemed researchers from UC Berkeley's SkyLab, our goal is to enhance and measure the capabilities of AI technologies for practical applications.Each month, millions leverage Arena Intelligence to understand frontier system dynamics, using our community's insights to foster transparent, rigorous, and human-centric evaluations. Leading organizations and AI laboratories depend on our assessments to gauge real-world reliability, alignment, and implications. Our leaderboards set the benchmark for AI performance, earning trust from industry leaders and influencing global discussions on model reliability and advancements.Our team comprises researchers, engineers, scholars, and innovators from renowned institutions such as UC Berkeley, Google, Stanford, DeepMind, and Discord. We prioritize truth-seeking, agility, and craftsmanship, valuing curiosity and impactful contributions over hierarchy. We're fostering a workplace where thoughtful and diverse individuals can excel. Each team member is a domain expert, contributing to an environment rich in excellence, energy, and focus.Role OverviewWe are looking for a Senior Full-Stack Product Engineer to spearhead the technical design and development of AI-focused products within our platform. This role involves taking ownership of features from inception to deployment—encompassing the proposal of technical solutions, implementation of core product workflows, and analysis of new functionalities' impacts. Ideal candidates should possess substantial experience in constructing reliable business logic at scale and be enthusiastic about influencing user interaction with state-of-the-art AI models.

Join Scribe as a Staff Full-Stack Engineer focused on driving growth and innovation. In this role, you will leverage your expertise in both frontend and backend development to create seamless user experiences that enhance our platform's functionality. You will collaborate with cross-functional teams to design, develop, and implement solutions that align with our growth objectives.

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.

Why Join Brex?At Brex, we are redefining how companies manage their spending through our AI-driven spend platform. Our integrated solutions, including corporate cards, banking, and global payment systems, empower businesses—ranging from startups to large enterprises like DoorDash, Flexport, and Compass—to effectively control their expenses and enhance operational efficiency.Joining Brex means being part of an innovative environment where you can challenge yourself, disrupt conventional thinking, and collaborate with some of the industry's brightest talents. We are dedicated to fostering a diverse team and inclusive culture, believing that your potential should be limited only by your dreams. We provide you with the tools, resources, and support necessary for your professional growth.Engineering at BrexOur engineering division focuses on creating scalable systems with purpose and speed. Our collaborative teams across Software, Data, Security, and IT work with high autonomy, tackling complex technical challenges and striving for excellence in every aspect, from architecture to deployment. Here, engineering is not just a job—it's a craft that cultivates leadership among builders.Your RoleAs a Senior Full Stack Software Engineer on the Task Workflows Platform team, you will develop and enhance the foundational infrastructure that supports crucial user experiences at Brex. Your responsibilities will include working on a diverse range of platforms, such as our multi-channel notifications engine, collaborative commenting system, and dynamic workflow rule builder. You will be instrumental in transitioning our task orchestration framework from a centralized model to more specialized solutions tailored for specific product domains.You will confront intricate full-stack challenges, from designing scalable backend APIs and automation rule engines to developing intuitive frontend user experiences for domain-specific task interfaces and workflow builders. Beyond core platform duties, your contributions will significantly influence broader product experiences, including utilizing AI to enhance user workflows and supporting the ongoing evolution of our productivity tools across web and mobile platforms.Work EnvironmentThis position is located in our San Francisco office. We adopt a hybrid work model that combines the dynamic interactions of in-office work with the flexibility of remote arrangements. Currently, we require a minimum of three coordinated days in the office each week.

Join Binti as a Staff Full Stack Software Engineer, where you will play a crucial role in developing innovative software solutions that empower families and enhance the adoption process. You will collaborate with a talented team to design, implement, and maintain user-centric applications that make a difference in people's lives.

Join Binti as a Senior Full Stack Software Engineer and play a crucial role in developing innovative software solutions that enhance our mission to streamline the adoption process. You will be responsible for designing, developing, and maintaining our web applications, ensuring optimal performance and user experience.In this position, you will collaborate with cross-functional teams, participate in all phases of the software development lifecycle, and mentor junior developers. If you are passionate about building scalable applications and are eager to solve complex problems, we want to hear from you!

We appreciate your interest in joining the Uncountable Engineering team!Position OverviewUncountable is on the lookout for enthusiastic interns who are eager to embark on a journey in full-stack software engineering. Our mission is to transform the landscape of industrial research and development. We seek passionate engineers ready to contribute to the creation of an advanced development platform utilized by Fortune 500 companies.Potential ProjectsYou'll have the opportunity to design databases for enhanced analytical capabilities and develop innovative interfaces and views that empower scientists in managing experiments.EligibilityWe will only consider candidates who are graduating within a year of the internship.Compensation: $6,000 per month

Employee Applicant Privacy NoticeJoin Our Mission:Be a part of revolutionizing the financial landscape with us. At SoFi, we are committed to transforming the way individuals engage with their personal finances. As a pioneering financial services firm and national bank, we leverage cutting-edge, mobile-first technology to empower millions of members to achieve their financial ambitions. The financial industry is undergoing a significant change, and we are leading the charge. Come to work every day knowing your contributions matter and align with our core values. Invest in your future, your career, and the financial ecosystem.Your Role:We are on the lookout for a Full-Stack Engineer to join our dynamic Member Benefits and Rewards team, which is integral to delivering member-centric benefits like credit card cash back and the 1% investment match.Additionally, you will play a key role in SoFi’s latest subscription service, SoFi Plus, a strategic initiative for our firm. Our team oversees member-facing functionalities on SoFi's app and website, as well as the backend streaming services that support the user experience. This is a fantastic opportunity to gain full-stack experience and demonstrate your skills in a high-priority company initiative.Your Responsibilities:Collaborate across Product, Design, Engineering, and Data Science teams to convert business requirements into scalable technical solutions.Guide and motivate engineers through code reviews, technical guidance, and by nurturing a culture of innovation and teamwork.Tackle complex challenges across infrastructure, data pipelines, and backend services to ensure robust, reliable, and future-ready systems.Drive innovation by recognizing opportunities for new technologies, AI/ML marketing strategies, and process enhancements to elevate our marketing capabilities.Take ownership of the entire project lifecycle—from ideation to deployment, monitoring, and ongoing enhancement.Stay abreast of industry trends by investigating advancements in AI/ML, personalization, and automation to refine SoFi’s marketing approaches.

At Benchling, we're at the forefront of a biotechnology revolution, transforming everything from medicine to agriculture with cutting-edge technology. As science progresses at an unprecedented pace, we are committed to empowering researchers and innovators with the tools they need to succeed.Our mission is clear: to harness the potential of biotechnology. Leading biotech firms rely on Benchling’s R&D Cloud to streamline product development, enhance operational efficiencies, and expedite their journey to market. Join us in reshaping the future of science through modern software solutions.ROLE OVERVIEWWe are seeking a talented Software Engineer to join our newly established Enterprise Lifecycle team. This dynamic group focuses on ensuring that our largest global clients—renowned organizations pioneering some of the most groundbreaking treatments—achieve success in highly regulated environments. Our goal is to assist these clients in validating the safety of their products and navigating complex regulatory landscapes with confidence.In this pivotal role, you will be a technical leader responsible for designing and developing critical systems that our enterprise customers depend upon for regulatory submissions and audits. Your contributions will directly impact features that are vital for FDA submissions and GxP-regulated workflows. This position sits at the intersection of platform development and product innovation, requiring deep technical acumen as well as a strong sense of product direction.We value technical excellence, a profound understanding of user requirements, and a dedication to crafting solutions that simplify complex scientific processes. If you’re passionate about solving challenging technical issues that can significantly influence global health and innovation, we invite you to apply.

Join Lead Bank as a Full Stack Software Engineer III, where you'll play a pivotal role in developing innovative software solutions. In this hybrid position, you will collaborate with cross-functional teams to deliver high-quality applications that enhance our banking services. Your expertise in both front-end and back-end technologies will be essential in driving projects from conception through to deployment.

Join our innovative team at Benchling as a Full Stack Software Engineer specializing in Chemistry. You will be a vital part of our mission to empower scientists and researchers with cutting-edge software solutions. Your role will involve designing, developing, and deploying applications that enhance scientific research and data management in the life sciences sector.

Join Our Team at Owner.comAt Owner.com, we are revolutionizing the way local restaurants grow through our innovative AI growth system, designed specifically for their needs.Our AI enhances SEO, marketing, and online ordering systems to maximize first-party orders, empowering small business owners with a user-friendly platform managed by experts. We provide a suite of tools that levels the playing field against larger chains.Our VisionWe aim to enable independent restaurants to thrive online, and our vision extends beyond them. Many local businesses face similar challenges, and we aspire to provide solutions that can assist them as well. Our goal is to develop technology that tens of millions of local business owners can leverage for success in the digital landscape.Our AchievementsSince our inception in 2020, we have generated substantial revenue and facilitated over half a billion dollars in online orders. Over 20,000 restaurant owners have benefited from our services, saving nearly $200 million in fees.Our TeamComprising top talent from leading companies in the SMB software sector, our team is poised for rapid growth as we expand further in 2026.Work EnvironmentAs a remote-first company headquartered in San Francisco with a sales hub in Toronto, we foster a flexible work culture. Most of our team members are distributed globally. For specific roles, we encourage in-person collaboration, so please consult with your recruiter regarding location details.

Blockstream was established in 2014 by Dr. Adam Back and a dedicated team of cryptographers and engineers who are deeply passionate about Bitcoin and its transformative potential for the financial landscape. Our mission is to create foundational Bitcoin infrastructure, and we have swiftly evolved into one of the foremost technology leaders in the sector.At Blockstream, we are committed to developing unparalleled solutions on Bitcoin that aim to revolutionize the traditional financial system. We envision a future where individuals and enterprises can seamlessly engage with a global, permissionless platform to safeguard their assets, utilize them daily, and invest or leverage them effectively. To realize this ambitious vision, we have created a comprehensive suite of innovative products built upon the Bitcoin protocol, including layer-2 initiatives like Liquid and Core Lightning, as well as user-centric software and hardware wallets such as Green and Jade. Our brand embodies innovation within the Bitcoin community, and we are expanding our team to hasten our trajectory into the future.In this position, you will craft services that empower users to develop dynamic and pioneering applications leveraging Bitcoin.

Join Cloudflare as a Senior Full Stack Software Engineer and be at the forefront of our mission to help build a better Internet. We are looking for talented engineers who thrive in a collaborative environment and are eager to tackle complex challenges.Your role will involve designing, developing, and optimizing applications across the full stack. You will work closely with cross-functional teams to create innovative solutions that enhance our platform's capabilities.

Your Contribution at Lila Sciences We are on the lookout for a Principal Software Engineer with full stack proficiency to become an integral part of our software team. You will play a key role in shaping the future of our AI-powered scientific platform. This position involves designing, constructing, and fine-tuning backend systems that support intelligent, data-centric applications. Your focus will be on creating user interfaces, services, high-performance APIs, and databases while ensuring the robustness of services that merge advanced AI frameworks with intricate scientific analytics and lab workflows. Collaboration is vital as you'll work alongside ML researchers, platform engineers, and scientists to build systems capable of managing varied workloads and scaling effortlessly. This includes working with structured SQL databases, data lake houses, and vector databases. If you are enthusiastic about crafting high-performance and sophisticated systems, we would love to connect with you! Your Responsibilities UI and API Development: Create secure, high-performance, and well-documented user interfaces and APIs that integrate seamlessly with AI applications. Database Design and Management: Develop schemas and oversee diverse data systems (including SQL, NoSQL, and Vector DBs) for peak performance and scalability. Application Implementation: Spearhead the development of both front-end and backend services with an emphasis on performance, maintainability, and reliability. System Optimization: Identify and resolve system bottlenecks to ensure high availability and low-latency performance across large-scale workloads. Cloud Services and Infrastructure: Utilize AWS services, Kubernetes, and cutting-edge DevOps practices to design and deploy production-ready systems at scale. Collaborative Development: Partner with ML researchers, engineers, and scientists to weave data pipelines, APIs, and cloud infrastructure into scientific workflows.

Superhuman embraces a vibrant hybrid working model for this position, allowing team members to enjoy a perfect blend of focused work time and collaborative in-person sessions. This approach nurtures trust, innovation, and a robust team culture.About SuperhumanGrammarly has become a key part of Superhuman, an AI productivity platform dedicated to unlocking the superhuman potential in everyone. Our suite of applications and agents seamlessly integrates with over a million applications and websites, including top products such as Grammarly’s writing assistance, Coda’s collaborative workspaces, Mail’s inbox management, and Go, our proactive AI assistant designed to understand context and provide timely help. Founded in 2009, Superhuman empowers over 40 million users, 50,000 organizations, and 3,000 educational institutions worldwide to eliminate busywork and focus on what truly matters. Discover more at superhuman.com and explore our values here.The OpportunityTo realize our ambitious goals, we are seeking talented Full-Stack Software Engineers to join our engineering teams. As a Full-Stack Engineer at Superhuman, you will be instrumental in developing essential components of our product offerings, infrastructure, and features that empower 40 million users to communicate more clearly and effectively every day. You will work across both Front-End and Back-End, contributing to significant and impactful projects.At Superhuman, our engineers and researchers are given the freedom to innovate and discover breakthroughs, significantly influencing our product roadmap. As we scale our interfaces, algorithms, and infrastructure, the complexity of our technical challenges is rapidly increasing. You can learn more about our work from our technical blog.With rapid growth, Superhuman offers opportunities to join dynamic teams, learn from experienced peers, and build products and teams from the ground up. Within our expanding engineering organization, there is ample opportunity for ownership and a direct impact on users.As a Full-Stack Engineer, you will:Begin coding and deploying features in your first week.Develop and maintain production services with high call rates on the Back-End and create rich user interfaces on the Front-End.Aim for high availability for both consumer and enterprise customers.