Staff Software Engineer at buildwithfern | New York City or San Francisco

About FernAt Fern, we empower software companies to create exceptional API experiences. Our clientele features industry giants such as Nvidia, Square, and Twilio, alongside rapidly growing AI innovators like ElevenLabs and OpenRouter.As the landscape shifts, most API integrations will be executed by AI agents who require well-structured schemas, reliable end…

About SandbarLocated in the vibrant heart of New York City, Sandbar is pioneering the development of innovative interfaces that empower individuals to navigate an agentic world with ease and freedom. Our talented team has a wealth of experience, having created software, machine learning, and hardware solutions at renowned companies such as Meta, CTRL-labs, Google, Apple, Fitbit, Peloton, and Equinox.Our flagship product, Stream, represents a groundbreaking human-agent interface—a private voice-activated ring and conversational computer. Stream is set to hit the market in Summer '26 and has already garnered attention from leading publications such as the Wall Street Journal, Bloomberg, and Wired.Join us as we revolutionize self-augmentation through cutting-edge technology.About the RoleIn your role as Head of Engineering, you will lead our dedicated software and machine learning teams to develop a new interface that simplifies computing to the level of intuitive thought. You will be instrumental in nurturing and expanding our mobile, infrastructure, backend, and AI/ML teams while working in synergy with our product, hardware, and firmware groups. Your expertise will be pivotal in the successful launch of Stream and in shaping the technical and product roadmap for our future innovations.This position is ideal for a seasoned engineering leader who is passionate about fostering team development and cultivating a vibrant culture, while striving to create transformative tools that empower individuals in an increasingly agentic world.

Join Noto as a Founding EngineerNoto is on a mission to revolutionize the after-school business landscape by creating an AI-native operating system tailored for tutoring centers, music schools, and sports academies. We aim to serve the 150,000 after-school businesses across the country, providing them with the technology they desperately need.Currently, these essential businesses operate with outdated software and a hodgepodge of basic solutions. At Noto, we're developing a comprehensive platform that leverages AI to deliver seamless, engaging experiences for users who are accustomed to manual methods like sticky notes and spreadsheets.Recently, we successfully secured a $3.8 million seed round, supported by esteemed venture capital firms such as Base10 and South Park Commons. Founded by technical experts AJ Ding and Steve Wang, Noto is headquartered in the vibrant city of New York.We are thrilled to expand our core team. If you're passionate about crafting innovative software solutions for small businesses, Noto is the place for you!

About Formation BioFormation Bio is a pioneering pharmaceutical company that leverages cutting-edge technology and artificial intelligence to revolutionize drug development. In an era where advancements in AI are generating more potential drugs than the industry can efficiently progress through costly and time-consuming clinical trials, Formation Bio, established in 2016 as TrialSpark Inc., has developed innovative technology platforms and processes designed to streamline all aspects of drug development and clinical trials. Our company partners with, acquires, or in-licenses drug candidates from pharmaceutical companies, research organizations, and biotech firms, propelling them beyond clinical proof of concept to ultimately deliver new medicines to patients. Our endeavors are supported by notable investors from both the pharmaceutical and technology sectors, including a16z, Sequoia, Sanofi, Thrive Capital, Sam Altman, John Doerr, Spark Capital, SV Angel Growth, and others. Learn more about us through the following links:Our Vision for AI in PharmaOur Current Drug PortfolioOur Technology & PlatformAt Formation Bio, our core values propel our mission to transform the pharmaceutical industry. Each individual and team plays a vital role in our shared commitment to expedite the delivery of new treatments to patients efficiently. About the PositionThe Senior Director, Medical Affairs is a pivotal leadership role responsible for developing and overseeing Medical Affairs capabilities across Formation Bio’s expanding portfolio. This role will lay the scientific groundwork for programs ranging from late-stage development to commercialization, initially focusing on our lead asset, Sprifermin.This leader will act as a strategic scientific collaborator with Clinical Development, Regulatory, Commercial, and Portfolio teams, ensuring that Medical Affairs strategies, scientific dialogue, and evidence generation are integrated early and executed with precision, compliance, and credibility.The Senior Director will architect scalable medical affairs infrastructure and lead external collaborations to maximize the impact of our scientific initiatives.

Join Grow Therapy as a Staff Engineer on our innovative Platform team, dedicated to fostering autonomy and enhancing productivity within our engineering organization. In this pivotal role, you will help us create an internal developer ecosystem that empowers our mission to make mental healthcare accessible and affordable across the U.S. You'll work on complex challenges involving AWS cloud infrastructure, Kubernetes (EKS) operations, and CI/CD pipelines, while leading large-scale initiatives that significantly impact our organization. Your expertise will be crucial in partnering with product engineering to deliver solutions that enhance development speed, reliability, and scalability.

At January, we are on a mission to revolutionize consumer finance by infusing humanity into the financial landscape. Our innovative, data-driven solutions empower financial institutions to enhance their collection processes, providing borrowers with clear, compassionate pathways to regain their financial footing. We are not merely increasing access to credit; we are restoring dignity and enabling millions to pursue financial independence.Role OverviewWe are seeking dynamic Senior Software Engineers to play a pivotal role in shaping the future of January’s technology platform. You will have the opportunity to apply to our organization as a whole, allowing us to match you with the team where your unique skills and interests will create the greatest impact.As a Senior Engineer at January, you will do more than just write code. You will take ownership of product outcomes, set the technical direction, and mentor fellow engineers while building systems that enhance the financial well-being of millions.Current teams looking for talent include:Borrower Acquisition: Scaling our communication platforms to ensure that the right borrowers receive the right message at the right time.Borrower Activation: Developing features in the Borrower Portal that assist individuals in resolving their accounts and achieving financial stability.Compliance and Money Operations: Ensuring our financial systems are accurate, scalable, and compliant while facilitating efficient money movement at scale.Your ResponsibilitiesDesign and implement highly scalable systems that serve millions of borrowers and financial partners.Contribute to architectural design and roadmap planning, shaping the direction of core projects.Lead by example through engineering excellence, advocating for best practices and maintaining high code quality.Mentor junior engineers to enhance the team's skills and capabilities.Collaborate across departments, working closely with Product, Design, and Operations to deliver impactful solutions.Propose and refine company-wide engineering processes in collaboration with other senior leaders.Qualifications5+ years of professional software development experience.Strong technical proficiency (experience in Python, React, Postgres, AWS is desirable; we welcome diverse backgrounds and are willing to teach these technologies).Exceptional problem-solving abilities and a passion for creating impactful solutions.Experience in designing and implementing scalable systems.Excellent communication skills with the ability to collaborate effectively across teams.

Who We AreAbout StripeStripe is a leading financial infrastructure platform designed for businesses of all sizes. From global enterprises to innovative startups, millions leverage Stripe to manage payments, enhance revenue, and seize new business opportunities. Our mission? To elevate the GDP of the internet, presenting a remarkable chance for you to influence the global economy while engaging in some of the most critical work of your career.About the TeamThe Account Abstractions team is responsible for the representation of user identities across Stripe's comprehensive product suite. We develop user-centric APIs and seamless experiences that integrate across all Stripe offerings, pushing the boundaries of scale for some of Stripe's most complex use cases.As we stand at a pivotal junction in the evolution of Accounts, we are unlocking platform functionalities that will significantly transform the synergy of Stripe products (such as expanding networked onboarding across our offerings) and drive forward our ambitious product goals for 2026. We are in search of a visionary technical leader to chart our technical direction and spearhead cross-functional product delivery.This highly visible role demands close collaboration with engineering leaders across Stripe and the capacity to set challenging objectives for a high-performing team.

At Stuut, we are revolutionizing accounts receivable processes for B2B enterprises, enabling smarter and faster collections. Our innovative platform is rapidly gaining traction among finance teams in industries such as industrials, chemicals, and manufacturing, serving a diverse client base from Fortune 10 leaders to emerging mid-market companies. We are backed by renowned investors including a16z, Khosla, Activant, 1984 Ventures, and Page One.About the RoleWe are seeking a dynamic Forward Deployed Engineer to engage directly with our clients, leveraging your technical expertise, problem-solving abilities, and a proactive mindset. In this role, you will lead the onboarding and implementation process for new clients, integrate Stuut with their ERP and workflow systems, and develop tailor-made solutions that yield significant results.This high-impact position is ideal for someone capable of writing production-level code, adept at communicating with both technical and executive stakeholders, and thriving in a client-facing environment. You will act as a crucial link between client requirements and the Stuut platform, ensuring that each deployment delivers tangible value while contributing to the evolution of our product.

Variant is a pioneering venture capital firm committed to investing in transformative projects within the crypto landscape. As early backers of groundbreaking platforms such as Uniswap, Morpho, World, Phantom, and Farcaster, we pride ourselves on identifying and nurturing innovation.Our team at Variant is small yet highly focused, deeply engaged in the daily operations of the projects we support. We collaborate closely with founders on strategic initiatives, product development, tokenomics, and incentive structures, acting as thought partners to help navigate the complexities of launching new ventures.Position SummaryWe are seeking an innovative AI Lead to enhance Variant's investment strategies and internal operations. In this role, you will serve as both an engineer and product manager, developing and managing AI and data products tailored for internal firm use. Think of this role as being at the forefront of our AI initiatives.Success in this position will be defined by your ability to create tools that elevate our entire team, including investment, operations, and marketing. You will be expected to proactively conceptualize, develop, and implement cutting-edge AI tools and products that streamline our processes.We envision a candidate who is not only passionate about AI but also actively explores the latest tools in their personal time.Essential AttributesProven Product Development Expertise: Demonstrated ability to create products that simplify workflow management and data analysis for third parties.Exceptional Communication Skills: Capable of clearly articulating and demonstrating the use of internal tools to diverse audiences.Agile Iteration: Diligently builds products in a timely manner while actively seeking and integrating user feedback.Creativity and Initiative: Proactively identifies opportunities for enhancement across all firm functions through data and automation.Cultural Fit: An optimistic, low-ego team player who embraces a no-task-is-too-small mentality.(Preferred) Crypto Knowledge: Familiarity with on-chain data analysis and active usage of crypto products.(Preferred) AI-Native Experience: Background in a startup or company that is at the forefront of AI tooling.Variant is an equal opportunity employer. We value diversity and are committed to creating an inclusive environment for all employees. We welcome applicants from all backgrounds and do not discriminate based on race, color, religion, gender, gender identity or expression, sexual orientation, age, or any other characteristic.

Join Stepful as a Senior Product Engineer and contribute to transforming allied healthcare training. You will develop an advanced Learning Management System that enhances user experience through adaptive learning and gamification. Collaborate with a mission-driven team to empower graduates in their job search and streamline our internal platforms for instructors and teaching assistants.

At January, we are revolutionizing the credit landscape. Our innovative, data-driven platform is designed to restore trust, achieve tangible results, and empower millions to progress toward a brighter financial future, while also humanizing the consumer finance experience. By harnessing data intelligence, we strive to build trust and deliver improved outcomes for both consumers and creditors.Our mission is straightforward: to broaden access to credit while equipping consumers with the tools they need to attain long-lasting stability and control over their financial lives. We initiated our journey by creating a robust foundation for creditors to engage and support borrowers throughout the entire debt lifecycle. By merging exceptional performance with unique consumer satisfaction and strict compliance, we have perfected outsourced collections. Our journey is just beginning, and together we are forging a financial system where trust and opportunity catalyze enduring change in people's lives.About the RoleAs the pioneering Senior Data Engineer at January, you will redefine our approach to data utilization in expanding access to credit—not merely by fixing existing issues but by unlocking new possibilities. You will take complete ownership of our modern data stack, transforming it from a system supported sporadically by analysts and engineers into a premier platform that anticipates and facilitates our most ambitious data initiatives. You will architect the data infrastructure that empowers millions to achieve financial stability, ensuring that insights flow seamlessly from production to decision-makers. By establishing data engineering as a core discipline at January, you will allow our analysts to focus on insights while you construct the scalable foundation that propels our next growth phase.What You'll DoOwn and enhance our comprehensive data platform — transforming our Snowflake warehouse from analyst-managed to engineer-optimized while standardizing data models for customer reporting, operational dashboards, and machine learning features.Create robust, self-healing data pipelines — designing ETL processes that scale automatically with data volume, implementing monitoring systems that preemptively identify issues, and optimizing costs without compromising performance.Facilitate accessible data utilization — developing intuitive models that empower PMs, analysts, and operations teams to independently find answers while adhering to security and compliance standards.Integrate engineering with analytics — establishing feedback mechanisms between production systems and analytical demands, ensuring schema changes do not disrupt downstream dependencies, and influencing how new features generate data.Lead data initiatives — championing projects that enhance our data capabilities, contributing to strategic data-driven decisions, and mentoring junior engineers.

At August, we're revolutionizing the legal industry with cutting-edge AI solutions tailored specifically for midsized law firms. Our mission is to enhance efficiency, client service, and competitive edge through innovative technology, unlike anything offered to the AmLaw 100.Our advanced platform enables attorneys to draft, review, and analyze legal documents with unprecedented speed and precision — transforming tasks that once took hours into mere minutes. Trusted by progressive firms across the U.S., Australia, and Asia, we are backed by top-tier investors such as NEA, Pear VC, and Stanford Law to fuel our global expansion.We pride ourselves on our agility, responsiveness to client feedback, and belief in the transformative power of AI within legal practice.The OpportunityAugust is on a mission to develop AGI specifically for legal applications. Our intelligent agents replicate the reasoning, research, and drafting capabilities of seasoned lawyers, with workflows that consistently surpass traditional legal performance in third-party assessments. We aim to empower mid-market law firms by automating their legal processes and enabling them to deliver our solutions directly to their clients. Join us as a pivotal member of our team, where you will contribute to scaling our agents to handle thousands of documents simultaneously and achieve outputs that exceed human accuracy.As a Founding Product Engineer, you will take a lead role in designing and refining production-grade agents that execute legal tasks with expert-level reasoning. Collaborating closely with our founders, legal professionals, and product team, you will implement AI systems within critical workflows utilized by real lawyers worldwide.What You'll DoCraft user-friendly and optimized UI/UX utilizing React and TypeScript for workflows that seamlessly integrate reasoning LLMs and agentic frameworks.Lead zero-to-one product development: rapidly prototype, assess, integrate, and test new features in close collaboration with our clients and legal experts.Innovate new AI-native workflows: design streaming, long-running tasks, procedural UX, etc., for new AI functionalities while balancing cutting-edge technology with practical application.About YouA minimum of 2 years of experience in developing production-quality frontend applications.Expertise in JavaScript/TypeScript, React, and Next.js.Demonstrated ability to create polished and intuitive user interfaces with a keen eye for detail.Comfortable working in a fast-paced early-stage company environment, taking ownership, and iterating quickly.Why Join AugustBe part of a pioneering team that is reshaping the future of legal practice.Engage in meaningful work that directly impacts the efficiency and effectiveness of law firms.Enjoy a collaborative culture that values innovation, creativity, and forward-thinking solutions.