About Us:At Parafin, we are dedicated to empowering small businesses, which are the foundation of our economy. Traditional banking solutions often fall short in supporting these enterprises, and that's where we come in. We create technology that simplifies access to essential financial tools for small businesses through their existing sales platforms.We collaborate with notable partners such as DoorDash, Amazon, Worldpay, and Mindbody to provide fast, flexible funding options, spend management solutions, and savings tools to small business users via seamless integration. Parafin handles the complexities of capital markets, underwriting, servicing, compliance, and customer support for our partners.Our team consists of innovators from leading companies like Stripe, Square, Plaid, Coinbase, and Robinhood, all driven by a shared passion for developing tools that foster the success of small businesses. With backing from prominent venture capital firms including GIC, Notable Capital, Redpoint Ventures, Ribbit Capital, and Thrive Capital, Parafin is a Series C company that has raised over $194M in equity and $340M in debt facilities.Join us in creating a future where every small business has the financial resources they need.About the PositionWe are seeking an experienced security-focused engineer to enhance and scale Parafin's security measures across our cloud and platform environments. Our Security and Infrastructure team is responsible for the foundational systems that power all of Parafin—from compute and networking to identity management and compliance. You will play a crucial role in ensuring these systems are secure, reliable, and compliant.In this role, you will design and implement controls, tools, and processes that maintain the resilience and compliance of our infrastructure, all while enabling developers to operate swiftly and safely. You will collaborate closely with various engineering and compliance teams to bolster our approach to access management, application security, threat monitoring, and incident response.

Parafin creates technology that helps small businesses access financial tools through the platforms they already use. Many banks overlook these businesses, so Parafin partners with companies such as DoorDash, Amazon, Worldpay, and Mindbody to deliver funding, spend management, and savings products through integrated solutions. The platform manages the complexities of capital markets, underwriting, servicing, compliance, and customer support for its partners. The team brings experience from Stripe, Square, Plaid, Coinbase, and Robinhood. Parafin is a Series C company with backing from GIC, Notable Capital, Redpoint Ventures, Ribbit Capital, and Thrive Capital, and has raised over $194M in equity and $340M in debt facilities. Role overview This San Francisco-based Accountant position focuses on operational and technical accounting, financial reporting, and treasury activities within a growing fintech company serving small businesses. The role helps shape efficient accounting processes and delivers accurate, timely financial information as Parafin expands and its operations become more complex. What you will do Oversee both operational and technical accounting tasks Support financial reporting and treasury operations Collaborate across product areas, including lending, business credit cards, and deposit accounts Manage cash movements and perform account reconciliations Develop technical accounting policies Design financial controls Streamline month-end close and reporting processes What we value Creative problem-solving in a startup setting Ability to manage multiple priorities while maintaining quality Interest in supporting the growth of small businesses Comfort working in a company that is rapidly evolving Location San Francisco, CA

About Us:At Parafin, we are dedicated to empowering small businesses. Recognizing that small enterprises are the cornerstone of our economy, we strive to provide them with the financial tools they need, overcoming the challenges posed by traditional banking systems. Our technology seamlessly integrates with established platforms like DoorDash, Amazon, Worldpay, and Mindbody, enabling small businesses to access fast funding, effective spend management, and savings tools. Parafin simplifies the complexities of capital markets, underwriting, servicing, compliance, and customer support for our partners.Our team consists of forward-thinking innovators from leading companies such as Stripe, Square, Plaid, Coinbase, and Robinhood, all united by a shared commitment to building solutions that facilitate small business success. Backed by esteemed venture capitalists, including GIC, Notable Capital, Redpoint Ventures, Ribbit Capital, and Thrive Capital, we have raised over $194M in equity and $340M in debt facilities as a Series C company.Join us in shaping a future where every small business thrives with the financial tools they deserve.About the PositionWe are in search of a passionate Product Manager to lead the complete product experience at Parafin. In this role, you will be responsible for crafting and managing our product roadmap as we develop a comprehensive suite of financial products designed to support the growth of small businesses. You will report directly to the Head of Product and play a pivotal role in defining the strategic direction of Parafin.Are you a self-motivated, customer-focused individual with a knack for creating innovative solutions to age-old challenges? If so, we invite you to join our team!What You’ll Be Doing:Define priorities across various initiatives at Parafin and establish an ambitious product roadmap.Collaborate with cross-functional teams, including engineering, design, marketing, account management, and sales, to implement the roadmap effectively.Engage with our customers, both platforms and small businesses, to ensure a seamless and enjoyable user experience throughout their journey.Work closely with the founders to articulate the long-term strategy for the business.Take ownership of building and launching new products from the ground up (0 to 1), emphasizing high ownership and cross-functional collaboration.What We’re Searching For:Strong analytical and problem-solving skills.Excellent communication and interpersonal abilities.Experience in product management or a related field.A passion for helping small businesses succeed.

Join Parafin as a Staff Product Engineer and play a pivotal role in designing and building innovative products that make a difference. You will collaborate with cross-functional teams to deliver high-quality solutions that exceed customer expectations.

About Us:At Parafin, our mission is to empower small businesses by providing them with the financial support they need to thrive. Small businesses play a crucial role in our economy, yet they often face challenges in accessing traditional banking services. We develop innovative technology that simplifies access to essential financial tools through the platforms they already use for sales. By partnering with industry leaders like DoorDash, Amazon, Worldpay, and Mindbody, we deliver fast and adaptable funding solutions, spend management, and savings tools to small business users via seamless integrations. Parafin manages the complexities of capital markets, underwriting, servicing, compliance, and customer support on behalf of our partners.Our team of dedicated innovators comes from top-tier organizations such as Stripe, Square, Plaid, Coinbase, and Robinhood, all driven by a shared passion for creating solutions that foster the success of small businesses. Backed by prominent venture capital firms including GIC, Notable Capital, Redpoint Ventures, Ribbit Capital, and Thrive Capital, Parafin is a Series C company with over $194M raised in equity and $340M in debt facilities.Join us in shaping a future where every small business has the financial tools they deserve.About the Position:As a Staff Product Engineer at Parafin, you will be the go-to expert for our implemented products. You will collaborate across design, product, and backend teams to ensure that everything functions seamlessly. Our focus extends beyond specifications; we prioritize understanding the purpose of features, identifying users, and solving their problems. You will take ownership of the entire frontend experience, addressing every transition, edge case, and state change that occurs between user actions and screen outputs.While familiarity with our specific stack is not required, a strong foundation in JavaScript and experience shipping real products using React and TypeScript are essential.Your Responsibilities:Create Scalable, High-Quality User Experiences: Collaborate with design to deliver exceptional UI/UX while also managing critical aspects such as page performance, cross-browser compatibility, and mobile responsiveness.Gain In-Depth Product Knowledge: Develop a strong understanding and perspective on the products we build. Work closely with product and design teams to contribute to the development process, rather than merely executing specifications.Monitor and Enhance Performance: Implement observability for user interactions, core web vitals, and overall perceived performance.Build Frontend and Product Infrastructure: Participate in the development of build systems, developer tools, and deployment pipelines. Advocate for improvements in the developer experience and create internal tools to streamline processes.

Join Parafin as a Staff Software Engineer on our Partner Platform team. In this pivotal role, you will design, develop, and enhance our partner integrations, ensuring seamless interactions with our cutting-edge financial technology. You will play a critical part in shaping the future of our platform and driving business growth through robust software solutions.

About Cogent SecurityCogent Security is an innovative Applied AI Lab pioneering the future of AI agents in the realm of cybersecurity. In a world where cyber threats evolve at unprecedented speeds, our 'AI Taskforce' analyzes vast amounts of enterprise data to proactively address vulnerabilities and avert critical breaches.We remain at the forefront of technology by merging cutting-edge research with practical applications. Our dedicated Cogent Research team fuels our mission, ensuring we develop truly effective security workflows powered by AI.Since our inception, Cogent has rapidly grown, collaborating with Fortune 500 companies to safeguard the most intricate production environments globally.Supported by Greylock, our team comprises some of the brightest minds in applied AI, including experts from:Renowned universities such as Stanford, Berkeley, Penn, Duke, Carnegie Mellon, and Waterloo.High-growth unicorn companies like Scale AI, Databricks, Stripe, Tesla, and Coinbase.Leading cybersecurity specialists from Wiz, Abnormal AI, and Zscaler.Prestigious research institutions including DeepMind and SAIL.About the RoleAs we embark on building a suite of backend services and integrations with our design partners, we seek passionate and skilled Backend Engineers at both Senior and Staff levels, eager to thrive in the Applied AI domain.ResponsibilitiesDesign and implement critical backend subsystems and integration platformsComprehend business objectives and customer requirements to engineer backend subsystems that align with our technology strategies.Adapt systems to meet evolving needs of design partners and clients.Incorporate non-functional requirements such as compliance and security into system design.Establish scalable infrastructure foundationsPrepare for future growth in customer base, headcount, and data management by collaborating with your team to enhance infrastructure.

About Us:At Parafin, our mission is to empower small businesses. We recognize that these enterprises are the backbone of our economy, yet traditional banks often overlook their needs. We create technology that simplifies access to essential financial tools for small businesses through the platforms they already utilize.We collaborate with major companies such as DoorDash, Amazon, Worldpay, and Mindbody, providing their small business users with rapid and flexible funding, spend management, and savings tools through seamless integration. Parafin manages the complexities of capital markets, underwriting, servicing, compliance, and customer service for our partners.Our tight-knit team of innovators comes from renowned organizations like Stripe, Square, Plaid, Coinbase, and Robinhood, all driven by a shared passion for building tools that foster small business success. Backed by prominent venture capital firms such as GIC, Notable Capital, Redpoint Ventures, Ribbit Capital, and Thrive Capital, Parafin is a Series C company that has successfully raised over $194M in equity and $340M in debt facilities.Join us in creating a future where every small business has the financial tools they require.About the Position:We are seeking a Product Designer to help shape the aesthetic and functional aspects of Parafin's products. You will work closely with product and engineering teams to design high-quality experiences across our product suite, from initial concepts to polished, production-ready designs.This role transcends mere aesthetics; you will manage core user journeys from start to finish, explore concepts through prototyping, and provide a strong perspective on craftsmanship, usability, and visual excellence. You'll also play a pivotal role in evolving our design culture as our team expands.If you enjoy unraveling complex challenges, care about craftsmanship, and want your work to make a significant impact on small businesses, you will thrive here.

Join Parafin as a Staff Software Engineer in Merchant Decisioning where you'll be at the forefront of developing innovative solutions that empower merchants. In this role, you will leverage your expertise to design and implement scalable systems that drive data-driven decisions, directly impacting merchant success.

About the Role Parafin is hiring a Staff Software Engineer for Lending Solutions in San Francisco, CA. This role focuses on designing and building new lending products. Work closely with product, design, and other engineering teams to deliver features that improve the lending experience for users. What You Will Do Design and develop lending solutions from concept through launch Collaborate with cross-functional partners to define product direction and architecture Contribute to decisions that shape the future of Parafin's lending platform Work Environment Expect to work in a collaborative setting where product impact and technical quality matter. The team values initiative and clear communication.

About Cogent SecurityCogent Security is pioneering the future of cybersecurity through Applied AI, creating advanced AI agents designed to combat rapidly evolving cyber threats. Our AI Taskforce analyzes vast datasets to neutralize potential breaches before they impact our clients.Our commitment to innovation combines cutting-edge research with practical application, ensuring our solutions are at the forefront of technology. In addition to our product development, Cogent Research acts as our applied AI laboratory, supplying the expertise required to create highly effective security workflows.Since our launch from stealth mode, Cogent has seen remarkable growth, collaborating with Fortune 500 companies to secure some of the most intricate production environments globally.Backed by Greylock, our team consists of exceptional talents from leading universities such as Stanford, Berkeley, and Carnegie Mellon, as well as high-growth companies like Scale AI and Tesla, and cybersecurity experts from stalwarts like Wiz and DeepMind.

Join parafin as a Senior Demand Generation Manager and play a pivotal role in driving our marketing strategy. You will be responsible for developing and executing innovative demand generation campaigns that resonate with our target audience. Your expertise will help us optimize lead generation and enhance conversion rates, ensuring sustainable business growth.

About Us:At Ambience Healthcare, we are more than just a technology company; we are pioneers in creating AI-driven solutions that bring the human touch back to healthcare. Our innovative platform is designed to reduce administrative burdens, allowing healthcare providers to concentrate on what truly matters: delivering exceptional patient care.We specialize in real-time, coding-aware documentation and clinical workflow support across a variety of healthcare settings, including ambulatory, emergency, and inpatient environments, working with top health systems across North America.Our team embodies a culture of extreme ownership and collaboration, striving to develop the best solutions for our partners and tackling vital challenges in the healthcare industry. We prioritize transparency, positivity, and deep thinking, holding ourselves to high standards because we recognize the significance of the problems we address.Ambience has been awarded #1 for Improving the Clinician Experience in the KLAS Research Emerging Solutions Top 20 Report, recognized by Fast Company as a leading tech innovator, named one of the best AI companies in healthcare by Inc., and selected as a LinkedIn Top Startup for both 2024 and 2025. Our growth is backed by eminent investors such as Oak HC/FT, Andreessen Horowitz (a16z), OpenAI Startup Fund, and Kleiner Perkins — and we are just beginning our journey.The Role:As a Staff Security Engineer, you will play a crucial role in safeguarding our platform within some of the most security-sensitive health systems in the nation. Security must be ingrained in our product from the ground up, not merely an afterthought.In this position, you will oversee the systems that shield our platform at scale, focusing on application security, cloud security, detection and response, and foundational security primitives that other teams rely on. Your responsibilities will include designing security frameworks that make secure choices the default, fortifying our infrastructure against potential threats, and collaborating with engineering teams to minimize risks effectively.This is a hands-on role; you will engage in coding, system design, and lead comprehensive security initiatives that foster enterprise trust and facilitate customer growth.What You’ll Own:Application & Platform Security — Develop and implement secure-by-default patterns across our backend and infrastructure, identifying and rectifying vulnerabilities in application logic, APIs, and data flows.Cloud & Infrastructure Security — Manage the security posture of our cloud environment, focusing on IAM, network boundaries, secrets management, and secure service-to-service communication.Detection & Incident Response — Construct and maintain detection pipelines, alerts, and runbooks, spearheading investigations to ensure swift and effective incident response.

About Cogent SecurityCogent Security is at the forefront of innovation in cybersecurity, operating as an Applied AI Lab dedicated to developing next-generation AI agents. In an era where cyber threats evolve rapidly, our "AI Taskforce" analyzes vast amounts of enterprise data to proactively address vulnerabilities and prevent significant breaches.Blending cutting-edge research with practical implementation, our team works diligently to transform theoretical concepts into actionable security solutions. Our applied AI lab, Cogent Research, provides essential research capabilities that enable the realization of autonomous security workflows.Since our emergence from stealth mode, Cogent has seen impressive growth, collaborating with Fortune 500 companies to enhance security in some of the world’s most complex environments.Supported by Greylock, we have assembled a team of top-tier talent from influential universities and leading companies in the tech and cybersecurity sectors.

Role Overview Amplitude is hiring a Staff Security Engineer in San Francisco, CA. This role focuses on strengthening security across the company’s systems and safeguarding user data. The position involves both hands-on technical work and collaboration with teams throughout the organization. What You Will Do Design and implement security controls and processes Conduct vulnerability assessments to identify and address risks Work closely with engineering and other teams to embed security best practices into the development lifecycle

Join Scale AI as a talented Infrastructure Security Engineer, where you'll play a pivotal role in safeguarding the integrity and security of our platform. This position focuses on securing expansive cloud environments, managing and fortifying various compute clusters, and reviewing infrastructure as code. Your proficiency in cloud security, infrastructure automation, and advanced security practices will be crucial in upholding and advancing our security framework.Your responsibilities include:Securing infrastructure across major cloud hosting platforms (e.g., AWS, Azure, GCP).Implementing and maintaining comprehensive security configurations and policies for cloud environments.Conducting regular security assessments and audits to identify vulnerabilities and propose enhancements.Developing and enforcing security best practices for infrastructure automation and orchestration.Collaborating with Developer Experience, IT, and product teams to integrate security into every phase of the infrastructure lifecycle.Reviewing and securing infrastructure as code (e.g., Terraform, CloudFormation).Mentoring team members on infrastructure security best practices and emerging threats.

Join our dynamic team at Parafin as a Senior Software Engineer specializing in Infrastructure. In this pivotal role, you will design, develop, and maintain robust infrastructure solutions that support our scalable applications. Your expertise will help us enhance system performance, reliability, and security.We are looking for innovative thinkers who thrive in a collaborative environment. You will work closely with cross-functional teams to implement cutting-edge technologies that drive our product forward.

Join parafin as a Senior Software Engineer in our Merchant Decisioning team, where you will play a critical role in developing cutting-edge solutions that empower merchants to make informed decisions. You will be involved in the entire software development lifecycle, from conception to deployment, ensuring robust architecture and high-quality code.

Role Overview Writer Inc. is hiring a Security Engineer focused on Detection and Response in San Francisco, CA. This position centers on building and maintaining security controls that safeguard the company’s digital assets. What You Will Do Develop and implement security measures to protect systems and data. Collaborate with teams across the company to strengthen security practices. Respond to security incidents and help improve incident response processes. Location This role is based in San Francisco, CA.