Founding Software Engineer

ABOUT SPHEREAt Sphere, we believe that transformative advancements in trade infrastructure drive market expansion and reduced transaction costs. Just as containerization revolutionized goods transport and SWIFT transformed money transfers, we are tackling one of the last frontiers: compliance. With over 190 sovereign jurisdictions constantly evolving and interacting, navigating trade rules is a complex challenge.Our cutting-edge AI system, TRAM, intelligently processes global trade law, expertly resolves jurisdictional conflicts, and delivers compliance determinations that outperform human experts. We manage the entire compliance lifecycle—calculation, registration, filing, and remittance—with unmatched speed and reliability.Backed by a16z and Y Combinator. With a $21M Series A funding round and over 30% month-over-month growth, our esteemed clientele includes ElevenLabs, Replit, Deel, Runway, and Lovable.A small, agile team with a global impact. Each team member possesses ownership over a domain that would represent an entire team at a larger company. We operate out of our San Francisco HQ, requiring in-office presence five days a week.The challenge is continuously evolving. As we expand into areas such as input tax, withholding, e-invoicing, and tariffs, the complexity multiplies. Today, we handle tens of millions of transactions, with billions on the horizon.THE ROLECustomer experience (CX) is pivotal at Sphere. Trust is paramount when it comes to managing payments and tax obligations for our clients. Every aspect of the user experience—from modals and buttons to exports—must be executed flawlessly. Would you trust a payment platform filled with bugs and inconsistencies?We are seeking a passionate founding product engineer to enhance our CX, elevate it to new heights, and contribute to the development of innovative features and products aligned with our roadmap.In this role, you will work closely with customers, collaborate with our design and engineering teams, and engage directly with our CEO and Founder to actualize Sphere’s vision of creating a unified global market.WHAT YOU'LL DOWithin your first few weeks:Engage with numerous customers to identify their core pain points and prioritize features that address their needs.Collaborate intensively with design teams to bring those features to fruition.Consistently execute and launch features from start to finish on a daily basis.Participate in customer support as needed to deepen your understanding of our users and their challenges.

Join Our Mission at JuiceboxAt Juicebox, we are committed to empowering teams to outsmart the talent competition. In this AI-driven era, the true value lies in human creativity. Recruiting has become a high-stakes endeavor where success is earned through strategic action.Our innovative platform is utilized by dynamic teams at Ramp, Perplexity, and top-tier AI labs, alongside over 3,000 clients ranging from nascent startups to established Fortune 500 companies.With an impressive $10 million in ARR and over 20% monthly growth, Juicebox is rapidly establishing itself as one of the premier AI SaaS solutions in the market, facilitating thousands of searches daily.Backed by a robust funding of $36 million, including a $30 million Series A led by Sequoia Capital, our investors include Coatue, NFDG, Lux Capital, Y Combinator, and BOND Capital.Your RoleWe are seeking a visionary Founding Product Manager to establish and lead our product function from the ground up. In this pivotal role, you will connect with customers, collaborate with engineering, design, sales, and customer success teams. You will represent the product externally, embody the voice of the customer internally, and partner closely with our engineering and design teams to prioritize, launch, and iterate on product features.This is a highly impactful and ownership-driven position that will significantly influence our product roadmap, operational workflows, and long-term strategy.Your ResponsibilitiesConvert customer business requirements into clear and actionable product specifications (PRDs, specs, tickets).Transform Juicebox’s vision into tangible product features.Collaborate closely with engineering and design teams to spearhead projects from inception to completion.Serve as the primary liaison for product feedback and requests, both internally and externally.Engage regularly with customers to identify pain points, workflows, and unmet needs.Balance the prioritization of bugs and features, considering immediate customer needs against long-term product goals.Advocate for product priorities grounded in data, customer insights, and sound judgment.Collaborate cross-functionally with sales and customer success teams to maintain strong feedback loops.

Join us at reducto as a Founding Product Manager in our San Francisco office, where you'll play a pivotal role in shaping our product vision and strategy. Collaborate with cross-functional teams to create innovative solutions that meet customer needs and drive business growth. Your expertise will guide product development from conception to launch, ensuring alignment with our company goals.

About UsAt Blueberry, we are revolutionizing the way ambitious brands connect with their customers. As the market dynamics shift, the personal touch that brands once had in engaging their audiences is fading. Initially, founders would personally respond to every comment and direct message, forming genuine connections with each customer. However, as brands scale and their audiences grow into the millions, maintaining that intimacy becomes increasingly challenging. Blueberry aims to restore that personal connection at scale. Our innovative product leverages in-depth research on social followers, empowering brands to engage authentically through personalized direct messages and perfectly timed offers. We make it possible for brands to know each follower by name and understand what motivates them to care about the brand.In just under three months, we have partnered with over 10 brands, including several nine-figure direct-to-consumer companies and NBA teams, to drive significant revenue and foster enduring loyalty.Backed by Pear VC, which has made early investments in companies like Doordash, Dropbox, and Gusto, as well as Founders, Inc., we have recently expanded our investor group to include SignalFire. We are now assembling a founding team that will help scale Blueberry with the world’s leading brands.The RoleAs we navigate an AI-driven landscape where coding is becoming increasingly standardized, the importance of taste and design quality becomes paramount. Our clients are the marketers behind some of the fastest-growing consumer brands, and exceptional design is no longer just a preference—it’s essential.As the Founding Product Designer, you will collaborate closely with the founders to shape the product, design system, and brand identity of Blueberry. Your contributions will define the product's aesthetics, functionality, and user experience, ultimately influencing how global brands cultivate authentic relationships with millions of customers.Your responsibilities will encompass the entire product design process, from initial ideation to refined execution. This role demands a balance of creativity, critical judgment, and ownership. Your early designs will set the benchmark for our product and design culture as the company expands.What You’ll DoCollaborate with the founders and early team to design Blueberry from the ground up, guiding its growth from inception to early scale.Work closely with founders Nima and Sean on defining early features and product direction.

Founding Product DesignerAbout DelveDelve is revolutionizing compliance with an AI-native platform that transforms cumbersome manual tasks into seamless automated workflows. We are the leading compliance company in the industry, empowering numerous organizations such as Lovable, 11x, and WisprFlow to reclaim valuable hours by minimizing busywork and enabling teams to focus on secure development.Supported by prestigious investors like Insight Partners, General Catalyst, and Y Combinator, we have successfully raised $32M in Series A funding and are on an aggressive growth trajectory.Our diverse team comprises former founders, Olympiad medalists, and renowned researchers, all united in our mission to eradicate busywork for humanity, beginning with the compliance sector.About the RoleWe are seeking a Founding Product Designer with extensive experience in information architecture and the design of complex, multi-step workflows. In this role, you will architect, design, and refine the essential user flows that underpin Delve’s AI-driven compliance platform, which consists of numerous interconnected modules and intricate workflows essential for high-stakes decision-making.You will collaborate closely with the founders, engineering, and product teams to transform ambiguous challenges into clear, intuitive, and scalable systems. This position is ideal for someone who excels at managing complexity, possesses a keen instinct for simplification (without oversimplifying), and thrives in environments where design decisions have immediate real-world consequences.You will have full ownership of the design process at Delve, influencing the navigation, hierarchy, and coherence across workflows within the entire product.Your ResponsibilitiesLead the end-to-end information architecture for a platform featuring 10+ modules and deeply interconnected workflows.Design systems to facilitate workflow resumption, progress tracking, and extensive user journeys extending over weeks or months.Create navigational structures that accommodate both task completion and exploratory workflows.Develop multi-step, procedural workflows in critical domains such as compliance, security, audits, and policy reviews.Identify and clarify cross-workflow dependencies, ensuring users always understand their next steps.Partner with engineering to ensure designs accommodate the scaling needs from early-stage customers to mid-market teams with complex requirements.Establish foundational information architecture that renders Delve accessible, predictable, and enjoyable to use.

Join tierzero as a Founding Product Designer and play a pivotal role in shaping our innovative products. We are seeking a creative and strategic thinker who is passionate about design and eager to make a significant impact from the ground up. You will collaborate closely with our founding team to establish the design vision and create user-centric solutions that enhance the customer experience.

About TierZero TierZero helps engineering teams operate more effectively in the AI era. The platform supports teams managing code in production, aiming to close the gap between human decision-making and machine capabilities. TierZero improves incident response, increases operational visibility, and encourages sharing of knowledge within teams. With $7M in funding from investors including Accel and SV Angel, TierZero works with companies like Discord, Drata, and Framer to optimize their large-scale systems. Role Overview: Founding Product Designer This San Francisco-based role is the first product design hire at TierZero. The designer will work closely with the CEO, CTO, and engineering teams, and will be in direct contact with customers to gather insights and feedback. The position blends design with system thinking, with a focus on building trust and supporting better operator decisions. What You Will Do Design core workflows and dashboards for AI agents handling incidents and production issues. Translate complex system behaviors into clear, dependable user experiences. Develop safety guardrails and interaction patterns that make automation predictable and reversible. Work closely with engineers to shape product decisions and defaults, going beyond visual design. Create high-density, high-signal interfaces for engineers working under pressure. Define how people interact, supervise, and collaborate with AI agents. Build interaction models for extended, multi-step agent workflows. Iterate quickly based on customer feedback from real incidents and on-call scenarios. Contribute to many areas of the company, including product direction, sales presentations, and office culture. Why Join TierZero? Work with a seasoned team, including a CEO with multiple startups behind them and a CTO with deep AI engineering experience. Join a company that values input and creativity, where every team member shapes the work environment.

About TierZero TierZero builds tools that help engineering teams manage code in production. While AI has sped up code creation, deploying that code still brings challenges. TierZero focuses on faster incident response, clear operational visibility, and better knowledge sharing among engineers. With $7M in funding from investors including Accel and SV Angel, TierZero supports high-scale systems for companies such as Discord, Drata, and Framer. The goal: help teams build strong infrastructure for an AI-driven engineering world. Role Overview: Founding Product Designer This is a hands-on role shaping TierZero’s core product experience from the ground up. As the first product designer, work directly with the CEO, CTO, and engineering team. Expect close collaboration with customers to ensure design choices are not just visually appealing, but essential to how the system works and builds user trust. What You Will Do Design workflows and dashboards for AI agents involved in incident investigations and production troubleshooting. Turn complex system behaviors into clear, dependable user experiences. Set guidelines and patterns so automation remains safe, reversible, and predictable. Partner with engineers to shape product decisions, defaults, and how failures are handled, not just the visuals. Create dense, information-rich interfaces for engineers working under time pressure. Define how humans interact with, monitor, and collaborate alongside AI agents. Develop interaction models for multi-step workflows that involve both people and AI. Iterate quickly on designs using feedback from real incidents and on-call use cases. Contribute across the company, from product strategy to sales demos and onboarding flows. Why Join TierZero? Work with a team led by a CEO with multiple successful exits and a CTO who spent a decade at Databricks leading AI efforts. The engineering team includes staff-level talent from Databricks, Brex, LinkedIn, Niantic, Nextdoor, and 11x. Location: San Francisco HQ

Discover the RoleWe are in search of a visionary Founding Product Designer who will play a pivotal role in shaping the future of AI-native systems within enterprise operations.This position transcends traditional design roles as you will engage at the convergence of AI, data, and operations, crafting innovative interfaces for environments where humans oversee and guide AI agents through complex workflows.Collaborate closely with our founding team to define the future of product design in an agent-driven landscape.Your ResponsibilitiesDesign intuitive interfaces for AI-centric operational workflows, including forecasting, replenishment, pricing, and exception management.Reimagine human interactions with AI agents, focusing on review, approval, override, and supervision processes.Develop text-rich, decision-oriented experiences that empower operators to act decisively.Create role-specific applications compatible across web, mobile, and eventually voice platforms.Contribute to the foundational development of Arkham’s core product and design systems.Engage in close collaboration with engineers, machine learning teams, and Forward Deployed Engineers interfacing with clients.

Founding Product DesignerLocation: San Francisco Bay AreaType: Full-TimeCompensation: Competitive salary + meaningful equity (founding tier)As a company supported by 8VC, we are assembling a premier team dedicated to solving one of the industry’s most pressing infrastructure challenges.Your Role: Founding Product DesignerWe seek a detail-oriented, systems-thinking Product Designer to join our rapidly expanding product team. This is a pivotal opportunity to craft innovative tools that will transform how the automotive sector interacts with its suppliers.You will collaborate closely with our founding team, engineers, and industry leaders to establish an unparalleled experience for the industrial enterprise, all driven by AI.Your ResponsibilitiesDefine & Shape: Transform ambiguous challenges into structured product experiences. You will help determine what features are essential and how they should feel.Design Workflows for AI Agents: Simplify intricate workflows into intuitive, action-oriented user experiences, balancing automation with user control and AI insight with human supervision.Think in Systems: Create components and workflows that scale across various modules, teams, and use cases — from dashboards to agent actions to supplier profiles.Collaborate Deeply: Work closely with engineers, PMs, and AI researchers to develop smart, user-friendly, high-performance interfaces.Own the Craft: Manage the entire design process — from wireframes and user research to polished prototypes and developer handoff.Drive Feedback Loops: Conduct user research, gather feedback, and iterate rapidly to enhance usability and effectiveness.Qualifications We Are Seeking5+ years of experience creating B2B SaaS products, ideally within data-rich or workflow-intensive environments.Demonstrated ability to lead the design of complex features end-to-end, particularly those that involve multiple user personas or integrations.Experience in developing (and contributing to) design systems for responsive web applications.Strong product sense — you consider not just the visual aspects but also what drives user value and business outcomes.

About Vali HealthAt Vali Health, we are pioneering the development of an intelligent AI manager that is set to revolutionize the operation of home healthcare services. Think of us as the essential nervous system for home care agencies: effortlessly coordinating caregivers, managing schedules, and ensuring that vulnerable populations receive dependable and compassionate care around the clock.Our innovative multi-agent platform goes beyond merely digitizing existing processes; it establishes an entirely new category of AI-driven healthcare operations. We are already assisting agencies in serving thousands of seniors who wish to age in place, leveraging technology that enhances care quality to be more consistent, proactive, and centered around human needs.The OpportunityRevolutionize Healthcare Operations While People SleepPicture a scenario where every after-hours call to a home care agency—be it emergency schedule adjustments, caregiver cancellations, or urgent client requests—can be addressed instantly, accurately, and with empathy, 24/7. We have laid the groundwork with a live prototype that is already impressing our customers. Now, we are in search of a founding engineer to help us refine the first truly autonomous after-hours operations system for healthcare.This role is not about replacing human judgment but rather enhancing human capabilities. You will develop AI solutions that manage routine operations seamlessly while discerning the right moments to escalate issues to human operators, ensuring that vulnerable populations receive the care they require at all times.This is a product-focused founding engineering position wherein you will collaborate directly with customers, witness the immediate impact of your work, and take ownership of the technical decisions that will make life-critical automation reliable at scale.What You'll Own & The Impact You'll CreateDevelop the Autonomous After-Hours Brain for HealthcareOversee the full autonomous operations pipeline—from voice interactions to workflow execution to human escalation—ensuring that no critical call remains unanswered.Design and implement intelligent systems that determine when AI is capable of handling situations independently versus when human expertise is necessary.Create Trustworthy AI for OperatorsConstruct the tools and integrations that empower our voice agents—workflow execution engines, structured data capture, and seamless transitions to existing systems.Develop comprehensive monitoring, review, and audit systems that instill complete confidence in AI-driven decisions among human operators.Enhance Through Real-World FeedbackIterate and perfect the AI systems based on feedback from real-world applications, continuously improving the quality of care delivered to clients.

About TierZero TierZero builds tools that help engineering teams manage and deploy code in the age of AI. While artificial intelligence speeds up development, shipping code can still slow teams down. TierZero’s platform gives engineers better incident response, operational visibility, and shared knowledge, so teams can keep moving and maintain high standards. Backed by $7 million from investors including Accel and SV Angel, TierZero counts companies like Discord, Drata, and Framer among its users. These organizations rely on TierZero to support complex systems and infrastructure for AI-driven work. Role Overview: Founding Product Designer This is a hands-on role shaping TierZero’s core user experience from the ground up. The founding product designer works directly with the CEO, CTO, engineers, and customers to design solutions that go well beyond surface visuals. Expect to influence the product’s direction and help define how engineers interact with AI-powered systems. What You Will Do Design workflows and dashboards for AI agents investigating incidents and solving production issues. Turn complex system behaviors, like confidence, uncertainty, and provenance, into clear, trustworthy user experiences. Set up guardrails and interaction patterns that make automation safe, reversible, and predictable. Work closely with engineers to shape product decisions, defaults, and failure modes, not just visual elements. Create high-density interfaces that help engineers act quickly under pressure. Define how people supervise, correct, and collaborate with AI agents. Model interactions for long-running, complex workflows that require careful handling of state, memory, and asynchronous progress. Iterate rapidly based on feedback from real incidents and on-call experiences. Pitch in across the company, from product direction to sales decks, onboarding, and even the occasional office snack run. Why Work at TierZero? Join a team led by a CEO with a successful exit and a CTO who spent a decade leading AI engineering at Databricks. The team includes engineers from Databricks, Brex, LinkedIn, Niantic, and Nextdoor. Contribute in an environment that values creativity and collaboration. Receive a competitive salary and benefits package designed to support both well-being and career growth. Location San Francisco HQ

Join cambio as the Founding Product Marketing Lead, where you will play a pivotal role in shaping our marketing strategy. You will be responsible for developing and executing innovative marketing campaigns that resonate with our target audience. As a key member of the founding team, you will collaborate closely with product development, sales, and customer success teams to create compelling messaging and drive product adoption.Your expertise in product marketing will help us define our value proposition, conduct market research, and analyze competitors. You will also oversee the creation of marketing materials and digital content, ensuring alignment with our brand identity.

Join Us as a Founding Designer at DaydreamAt Daydream, we are revolutionizing the way dentists manage their revenue cycle. Our innovative product streamlines the intricate processes of insurance verification, claim submission, appeals, and patient billing. With a staggering $165 billion market at stake, our mission is to ensure that dentists receive the full compensation for their hard work, while enhancing the patient experience.We’re committed to combating the inefficiencies of the American healthcare system—reducing confusion and making services more accessible and affordable. By automating key aspects of revenue cycle management, we promote transparency for patients and providers alike, empowering small business owners in the dental field across the nation.

About Uplane (YC F25)At Uplane, we are revolutionizing the advertising industry. Companies are losing billions due to ineffective ads, misaligned landing pages, and suboptimal budget distribution. Uplane addresses these challenges by integrating various agencies, spreadsheets, and isolated tools into a cohesive, self-optimizing AI platform. Our system not only generates advertisements but also crafts corresponding landing pages, optimizes budget allocation across diverse channels, and more. Join us in constructing the AI engine that will redefine how marketing budgets are managed and spent worldwide.About The RoleWe are on the lookout for an innovative and self-motivated AI Software Engineer to become a crucial part of our team in San Francisco. This full-time, on-site position presents an exceptional opportunity to take full ownership of product features from ideation to deployment in a dynamic startup environment.Why Join Us?Be among the pioneering employees of a well-funded startup.Tackle significant challenges in a vast market.Take charge of projects and experience rapid professional growth.Enjoy a culture that is fast-paced, ambitious, enjoyable, and humble.Key ResponsibilitiesCreate AI Systems: Design, develop, and maintain scalable AI solutions with LangGraph and TypeScript for automated marketing campaigns.Data Infrastructure Design: Build the data analytics framework that enables AI agents to enhance their intelligence over time.Architect Robust Systems: Construct and manage efficient database architectures using PostgreSQL and Supabase to ensure data integrity and performance.End-to-End Project Management: Lead projects through all phases, from concept to implementation, deployment, and ongoing support.User-Centric Feature Development: Utilize your product and design insight to create features focused on user needs and market trends.Collaborative Engagement: Work closely with the operations team and clients via Slack and Notion to align technical solutions with user expectations.QualificationsBachelor’s or Master’s degree in Computer Science, Data Science, or a related engineering field, or equivalent practical experience.Proficiency in programming languages such as TypeScript and experience with AI systems is preferred.Strong understanding of database management, particularly with PostgreSQL and Supabase.Ability to collaborate effectively within a team and communicate technical concepts clearly.

Join Thorin as a Founding Product Manager!As a pioneering member of our team, you will play a pivotal role in shaping the future of applied AI solutions that redefine productivity in modern organizations.At Thorin, we leverage cutting-edge AI technology to create proactive agents that continuously monitor and optimize workflows across platforms like Slack, email, and meetings, ensuring that no task falls through the cracks.Our approach goes beyond traditional AI tools; we build real-time digital twins of organizational processes, enabling seamless automation and actionable insights over extended timeframes.With the visionary guidance of Joe Lonsdale and the backing of 8VC, Thorin is set to become a cornerstone of AI-driven productivity.

Join Pensive as a Founding EngineerAt Pensive, we are on a mission to revolutionize learning through technology. Check our Notion doc to dive deeper into our vision, founders, and vibrant culture.Your RoleAs a pioneering full-stack engineer at Pensive, you will be at the forefront of the AI revolution, developing software that empowers college instructors and students to learn quickly and automate processes. You will play a crucial role in building:An AI-driven grading and tutoring platform designed to save time for instructors and enhance learning for millions of students.Automation solutions across various business functions, from data management to customer onboarding, pushing towards a fully autonomous operational model.What We Expect From YouA minimum of 1 year of experience in software development.Proficiency in Python and React/Typescript.A fast and efficient development style, utilizing AI tools while maintaining clean, well-tested, and non-AI-generated code.A strong ability to learn rapidly and adapt to fast-paced changes.Bonus QualificationsExperience as a founder or in a founding engineering role.A personal workflow for generating and reviewing AI-assisted code.Our Technology StackBackend: Python, FastAPI, PostgresFrontend: Typescript, React, TailwindCSS, Tanstack RouterInfrastructure: GCP, Cloud Run, FirebaseMobile Development: CapacitorInterview ProcessInitial Interview Chat: 15 minutesTake-Home Test: 8 hoursPaid Work Trial

At Netic, we are revolutionizing the AI landscape for essential services that underpin the American economy.With $43 million in funding from notable investors such as Founders Fund, Greylock, Hanabi, and Dylan Field who spearheaded our Series B, we have empowered our clients to secure hundreds of thousands of jobs across various service sectors in North America. Our platform is now being utilized by companies that operate entirely on an AI-first model.Join a team of passionate innovators from leading organizations like Scale, Databricks, HRT, Meta, as well as distinguished institutions like MIT, Stanford, and Harvard, as we strive to integrate cutting-edge AI into the physical economy, tackling challenging problems with complex data and delivering immediate, impactful results.As a Founding Platform Engineer, you will take ownership of the semantic layer that powers our record-keeping system and facilitates the development of compounding products across the organization. This role is uniquely positioned within Netic due to the extensive scope and design of our platform. From day one, our system must operate seamlessly across various industries, geographic regions, and regulatory frameworks, necessitating a highly customizable platform that supports distinct workflows and business rules while remaining comprehensible and manageable for engineers in production.Your work will directly influence how dynamic workflows are constructed, packaged, and delivered to our customers. The abstractions you create will play a crucial role in the speed at which we can launch new products, enter new verticals, and address real-world edge cases without compromising reliability. If you are enthusiastic about crafting foundational systems where flexibility, accuracy, and developer experience are paramount, this is an exciting opportunity to build a resilient platform that will define our company.

Location: Bay AreaRole: Founding Abuse Engineer Arena Intelligence provides transparent, real-world evaluations of AI models. Founded by researchers from UC Berkeley’s SkyLab, the company supports organizations worldwide with trusted benchmarks and monthly leaderboards used by millions. Arena’s team draws on experience from UC Berkeley, Google, Stanford, DeepMind, and Discord, and values truth, speed, and quality. The company encourages curiosity and welcomes people who want to make a difference in practical AI assessment. Role overview The Founding Abuse Engineer shapes the strategy and systems that keep Arena’s platform safe from misuse. This position covers everything from designing detection and enforcement tools to investigating threats and defending the integrity of Arena’s leaderboards. The work is both foundational and highly visible, setting standards for future trust and safety efforts as threats evolve. What you will do Design and implement systems to detect and prevent automated abuse and other misuse across Arena’s products Investigate threats and respond to new abuse tactics targeting AI model evaluations Collaborate with product, infrastructure, model collaborators, policy, and leadership teams to maintain secure and reliable leaderboards Define technical strategy for platform integrity and trust Establish the foundation for future trust & safety and abuse engineering work Collaboration This role works closely with teams across Arena, including product, infrastructure, policy, and leadership. The impact is direct: keeping leaderboards secure, intercepting harmful behavior, and ensuring Arena’s services can be safely deployed.