Senior Full Stack Engineer, Integrations

Are you a talented Senior Full Stack Engineer looking to make a significant impact in the world of financial technology? Join Truebill's innovative team, where you will play a pivotal role in developing and enhancing our Autopilot product. You will work with cutting-edge technologies, collaborate with a diverse team, and contribute to building solutions that empower consumers to take control of their finances.

About StackAIStackAI is a revolutionary no-code AI workflow platform that enables businesses to construct, implement, and expand AI-driven workflows without requiring extensive machine learning expertise. With a growing user base and increasing enterprise adoption, our goal is to democratize access to large language models (LLMs), empowering every business operator—beyond just developers. Supported by Y Combinator and top-tier investors, we are laying the groundwork for the AI-driven future of work.The RoleAs a Senior Full Stack Engineer, you will be instrumental in defining the product and technical architecture at StackAI. Your responsibilities will span the entire technology stack, from crafting scalable backend systems to creating stunning and user-friendly frontend interfaces, and incorporating advanced AI models into our platform. This role offers significant impact, as you will work closely with the founding team, take charge of essential product features, and shape the engineering culture of a rapidly evolving startup.We seek exceptional 10X engineers—innovative builders who can consistently deliver results in a dynamic environment, remain inquisitive, and excel in diverse roles.ResponsibilitiesIn this role, you will:Build and own the entire platform, from backend services and APIs to frontend interfaces.Create robust, scalable backend systems utilizing Python and FastAPI (or similar), with optimized databases (SQL/NoSQL).Design and maintain high-quality user interfaces using React, Next.js, TypeScript, and Tailwind CSS, ensuring polished, intuitive, and responsive user experiences.Integrate new AI models and features into our products for seamless performance and enhanced value.Manage StackAI’s landing and product pages to establish benchmarks for clarity, design, and quality.Collaborate across the stack to connect backend services with frontend applications seamlessly.Engage with design, product, and customers to refine product direction and prioritize user needs.Stay at the forefront of full-stack technologies, promoting best practices and innovative solutions.Assist with customer support as needed; every team member contributes to user satisfaction.

Join our dynamic team at gumloop as a Senior Full Stack Engineer, where you will play a pivotal role in shaping our technology landscape.Take ownership of end-to-end feature development: design, implement, test, deploy, and maintain your creations in production.Collaborate closely with users to swiftly transform feedback into actionable improvements, achieving results within hours, not days.Develop and manage scalable front-end and back-end solutions that maintain speed and reliability as user traffic increases.Contribute to the growth of the team by reviewing pull requests, providing context, and mentoring junior engineers.

At CreatorIQ, we are dedicated to revolutionizing creator-led growth, empowering over 1,300 global brands and agencies to thrive.Our mission is to humanize businesses while amplifying the impact of individuals. Guided by our core values—intentionality, excellence, collective journey, and humanity—we have been recognized as one of the best workplaces by various programs, including BuiltIn LA and NY. Our growth story includes being named one of the Fastest-Growing Companies in North America by Deloitte Technology Fast 500™ for four consecutive years, and being highlighted as a leader in IDC MarketScape: Worldwide Influencer Marketing Platforms for Large Enterprises in 2025, among others. Our flexible work model fosters collaboration and innovation, accommodating diverse working styles.Join us in our exciting journey. Become a vital part of our dynamic team and help transform the industry!Senior Full Stack Engineer, Creator RecruitWe are looking for a talented Senior Full Stack Engineer to enhance our Creator Tools team. Your contributions will significantly improve user experiences and help us develop scalable solutions for our expanding platform.The ideal candidate will possess a strong background in frontend frameworks, solid backend development skills, and a collaborative spirit suited for a fast-paced environment. You should be ready to take ownership of features, contribute to architectural decisions, and maintain high coding standards.The Creator Tools team is responsible for developing all user-facing features on our platform, directly impacting the lives and livelihoods of creators who utilize our tools to earn and sustain their businesses.From payment processing and social authentication to e-commerce solutions and campaign workflows, we enable the full creator experience. Every feature you develop and enhancement you implement is integral to delivering a seamless, intuitive platform that empowers creators to grow and earn with confidence.This role allows you to make an immediate and meaningful difference in the lives of creators who rely on our platform to pursue their passions.

At Ripple, we are on a mission to transform the way value is exchanged across the globe, making it as seamless as sharing information. Our innovative crypto solutions empower financial institutions, businesses, governments, and developers, enhancing the global financial landscape and fostering economic equity and opportunities for all. Join us and experience personal and professional growth while collaborating with a supportive team.Ready to make a difference and unlock exciting career advancement? Come and create tangible value with us.THE ROLE:We are in search of a Senior Full Stack Engineer within our Design & Marketing Engineering team. In this pivotal position, you will shape, maintain, and scale Ripple’s marketing web ecosystem, creating dynamic, high-performance, globally scalable experiences that enhance our brand identity and empower our internal stakeholders.This role is perfect for an engineer who is passionate about contemporary web architecture and excels at the convergence of design, marketing, and technology. You will work closely with digital designers, brand specialists, integrated marketers, and content teams, crafting user-centric solutions that are both elegant and sustainable for the business.You will lead by example, engaging in hands-on coding and strategic architecture, influencing the technical direction of Ripple’s marketing sites, including the evolution of our Next.js + Sanity + Vercel stack into a fully dynamic, CMS-driven platform.

Why Choose Doppel?At Doppel, we are at the forefront of combating one of the most significant challenges posed by artificial intelligence: the prevalence of sophisticated social engineering tactics. With an alarming rise in scams, deepfakes, and other malicious attacks across various digital platforms—including websites, social media, advertisements, and encrypted messaging apps—our mission is both ambitious and vital: to create a safer internet by outsmarting these rapidly evolving digital threats.Supported by leading investors like a16z and Bessemer, and trusted by globally recognized brands such as OpenAI, United Airlines, and Coinbase, Doppel is expanding rapidly. If you are passionate about leveraging bold technology to tackle real-world challenges, we want to connect with you.Our VisionWe are developing an AI-native platform dedicated to defending against social engineering attacks.This entails creating scalable systems that continuously monitor billions of domains, social media accounts, applications, dark web forums, and more, utilizing AI agents to detect and neutralize digital threats effectively.Your RoleWe are seeking a seasoned backend engineer to design and enhance an automated system aimed at streamlining various Security Analyst functions. Our objective is to verify and neutralize threats within minutes through AI-driven automation. Recent achievements include:Developed a sophisticated LLM engine that quadrupled verification efficiency for our highest volume product line, enabling rapid takedowns at scale.Created a QA and data labeling tool to facilitate a seamless feedback loop among human analysts, machine learning models, and LLM agents.As a member of our San Francisco team (in-office a minimum of three days a week), you will:Play a vital role in developing systems that safeguard billions from AI-generated scams and digital threats.Take ownership of projects from gathering product requirements to continuously evaluating and refining released features.Mentor junior engineers, nurture a high-performance team culture, and contribute to shaping the team’s roadmap.Participate in monthly team dinners, happy hours, and social events (including outings to the Exploratorium, Valkyries games, etc.).What We Provide A mission-driven culture characterized by humility, high accountability, deep customer focus, and an abundance of exceptional talent. Complimentary lunch and dinner provided in the office. Flexible Paid Time Off (PTO).

About HappyRobotHappyRobot is pioneering the AI-native operating system tailored for the real economy, seamlessly bridging the gap between intelligence and actionable outcomes. By harnessing real-time data, specialized AI agents, and a central orchestrating intelligence, we empower enterprises to manage intricate, mission-critical operations with unparalleled autonomy.Our AI OS accumulates knowledge, optimizes processes across various levels, and adapts over time. We are initially focusing on supply chain and large-scale industrial operations, where resilience, speed, and ongoing enhancement are paramount—allowing human talent to concentrate on strategic, creative, and other high-value endeavors.Discover our vision further in our Manifesto. HappyRobot has successfully raised $62 million to date, including a recent $44 million in Series B funding in September 2025. Our esteemed investors include Y Combinator (YC), Andreessen Horowitz (a16z), and Base10—partners committed to our mission of transforming enterprise operations. We are channeling this investment into assembling a top-tier team: individuals driven by relentless ambition, adept problem-solving skills, and a passion for pushing boundaries in a dynamic, high-energy environment. If this resonates with you, we invite you to be part of HappyRobot.About The RoleAt HappyRobot, our Full Stack Engineers take ownership of significant components of our product and infrastructure, delivering from end to end.We seek innovators who thrive in uncertain environments, have a deep appreciation for their craft, and desire genuine ownership of their creations.

About UsAt Valdera, we empower manufacturers to turn their visions into reality by revolutionizing the way they source materials. Our innovative platform simplifies the process of finding top-quality materials and suppliers, enabling manufacturers to create exceptional products at scale and distribute them globally.As a rapidly expanding team, we have established successful partnerships with Fortune 500 industrial manufacturers, beauty brands, and chemical companies. We seek driven and talented individuals who excel in high-performance settings and are eager to advance their careers swiftly.Our culture encourages top talent to tackle significant challenges, collaborate with industry leaders, and witness the tangible impact of their contributions. If you are seeking a dynamic environment where your ideas can foster change, Valdera is the perfect place for you.Join us in shaping the future of manufacturing.

About MeshAt Mesh, we are on a mission to revolutionize the way people transact by allowing consumers to pay and receive payments with any asset. With trillions of dollars in tokenized assets largely untapped for everyday commerce, Mesh is here to bridge that gap. Our innovative solutions make crypto payments reliable, accessible, and seamless for everyone. We leverage a powerful orchestration engine combined with an intuitive consumer app to unlock liquidity worldwide. Supported by prominent investors like PayPal Ventures, Paradigm, and Galaxy Ventures, we are shaping the infrastructure for the future global economy. Join us on this exciting journey!OverviewWe are looking for an accomplished Senior Full Stack Software Engineer (Web3) with extensive experience in developing cutting-edge web applications and scalable backend systems. In this pivotal role, you will design, develop, and maintain our innovative software solutions, integrating essential Web3 functionalities such as wallet connections, signing flows, and on-chain/off-chain interactions. As a global company headquartered in San Francisco, California, our team collaborates closely across North America, Europe, and India.

The ideal candidate is encouraged to work from any of our offices (Silver Spring, NYC, SF, Miami, Denver) 1-2x weekly.ABOUT ROCKET MONEY At Rocket Money, our mission is to significantly enhance the financial well-being of millions. We provide our members with a profound understanding of their finances along with a range of valuable services designed to save time and money, ultimately empowering them on their financial journey.ABOUT THE TEAM The Core team plays a critical role in enabling all engineering teams at Rocket Money to operate efficiently by ensuring that our foundational systems are reliable and easy to build upon. We are responsible for the evolution of platforms and services that are central to our product and company operations, including:Authentication (registration, login, account access, and user lifecycle workflows)Data Privacy and Trust Systems (handling privacy requests, user deletions, and secure management of sensitive data)AI Enablement (providing shared AI infrastructure and tools that other teams use to create exceptional product experiences)Internal Tooling (developing admin tools, operational systems, and data integrations to enhance the effectiveness of our operations and engineering teams)We prioritize accuracy, resilience, and creating the most straightforward pathways for our teams. If you are passionate about building high-impact systems that others rely on, we would love to hear from you.IN THIS ROLE, YOU'LL:Develop and manage Core services and platforms that underpin essential systems like authentication, data privacy workflows, AI capabilities, and internal tools.Take ownership of projects from inception to completion: defining problems, designing solutions, implementing changes, launching, and ensuring ongoing reliability.Collaborate closely with product engineers, data teams, and operations colleagues to create systems that are safe, scalable, and user-friendly.

Join Truebill as a Senior Full Stack Engineer specializing in Partnerships and Marketing Technology. In this pivotal role, you will collaborate with cross-functional teams to develop scalable solutions that enhance customer experiences and drive business growth. Your expertise in both front-end and back-end technologies will be essential in creating innovative platforms that support our strategic partnerships.

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.

About PrimerPrimer is an innovative network of K–8 schools dedicated to revitalizing the fundamental principles of American education. Drawing inspiration from the original teaching primers that cultivated generations of readers, thinkers, and builders, our schools focus on proven methods while preparing for future challenges. We foster close-knit learning environments, empower skilled educators, and maintain a culture that respects children as both learners and leaders.For over 200 years, primers have shaped the American educational landscape. Now, Primer is preparing children for the next chapter.The software we develop underpins our Microschools, facilitating operations from day one. It assists teachers in sourcing real estate, recruiting students, and delivering genuinely personalized education. Our platform provides valuable insights to parents, supports virtual teachers in offering exceptional experiences, and streamlines our back-office operations. We have a broad scope of work ahead and a commitment to making a significant impact.We are assembling a small, talented team of hands-on engineers to play a pivotal role in the evolution of Primer.Role OverviewWe are in search of a skilled Full Stack Engineer to join our dynamic team. In this capacity, you will help reimagine the school experience through modern technology. You will create features that teachers, students, and families depend on daily while addressing tangible challenges in education.This position is based in San Francisco and requires in-office attendance five days a week.ResponsibilitiesTechnical Stack: Engage with technologies including TypeScript, NodeJS, GraphQL, Prisma, Postgres, NextJS, React, and Relay.Collaborative Environment: Collaborate daily with team members across engineering, product, design, and our academic program.Ownership and Growth: Take complete ownership of projects and enhance your skill set. You will have opportunities to lead initiatives that shape the product, with ample room for professional development.Engineering Culture: Contribute significantly to establishing our engineering culture as we expand our team.Deliver Quality Products: We uphold high standards for quality, so be prepared to work diligently to achieve excellence.QualificationsPassion for Education: You possess a genuine passion for transforming the U.S. education system. While this work is challenging, successful outcomes will prove to be the most rewarding of your career.

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 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 prosper as a Senior Full Stack Software Engineer, where your expertise will drive innovation and enhance our technology solutions. In this role, you will collaborate with cross-functional teams to develop scalable applications, ensuring high-quality code and performance. Your contributions will help shape the future of our platform and improve user experiences.

Join Kiddom as a Senior Full Stack Engineer in our AI Experience Pod!At Kiddom, we're transforming education by blending high-quality instructional materials with innovative digital learning tools. Our platform empowers schools and districts to develop tailored curriculums that reflect the unique needs of their communities. With powerful insights for educators and leaders, we drive continuous improvements in instruction and professional development.We are seeking a Senior Full Stack Engineer to elevate our AI-powered offerings. This role is pivotal in creating user-friendly and high-performance interfaces that enhance the educational experience for both teachers and students. As part of a small, agile team, you will collaborate closely with product, design, and data specialists to integrate AI tools that streamline development and improve code quality.If you are an engineer with a passion for AI and thrive in navigating complex challenges, this is the opportunity for you! Join us in building transformative, AI-first products that will make a difference in education.