Founding Full-Stack Engineer at weekdayworks | San Francisco

Join our client as a Founding Full-Stack Engineer!We are seeking a talented and passionate Full-Stack Engineer to be part of a dynamic team in San Francisco. This is a unique opportunity to work closely with an innovative startup transitioning from seed funding to Series B. As an early hire and founding engineer, you will have a significant impact on the development of our product and the direction of our company.

Founding Full Stack EngineerLocation: San Francisco Bay AreaType: Full-TimeCompensation: Competitive salary + significant equity (founding tier)Supported by 8VC, we are assembling a top-tier team to address one of the industry's most pressing infrastructure challenges.About the RoleWe are seeking a founding full stack engineer to help design and build our platform from the ground up. This is a rare opportunity to influence a substantial portion of the technology stack and advance into a leadership position with considerable equity potential.You will work on infrastructure that merges extensive data systems with AI-driven agents. This role offers a high degree of autonomy and ownership over core architecture and the foundational team culture.Your responsibilities will include writing production code for both backend and frontend, defining interfaces between components, shaping devops and data infrastructure, and translating abstract ideas into functional systems. If you thrive in an environment with rapid feedback, direct impact, and long-term rewards, this position is ideal for you.ResponsibilitiesDesign and develop scalable APIs, backend services, and web application componentsContribute across the technology stack: data pipelines, agents, web UIs, and deployment systemsCreate and implement internal tools, testing frameworks, and CI/CD pipelinesCollaborate closely with product and design teams to quickly prototype and deliver featuresHelp establish engineering processes, contribute to documentation, and foster the early team cultureOur Technology StackWhile familiarity with the entire tech stack is beneficial, the ability to quickly learn and adapt to new technologies is paramount. You will encounter technologies such as:Languages: TypeScript (Node.js), Python (FastAPI)Frontend: React, Next.js, TailwindBackend: Postgres, DuckDB, GraphQL (Hasura), Kafka, RESTCloud/Infra: AWS, Docker, GitHub Actions, ArgoCD, Kubernetes (basic)AI/Agents: LangChain, LangGraph, OpenAI, Anthropic, LLaMA, Pinecone, QdrantGovernance: Keycloak, Open Policy Agent (OPA), OpenTelemetryVisualization: Vega, Flourish, React ReChart

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 the Dryft TeamDryft is at the forefront of innovation, creating intelligent systems that streamline complex human decisions in manufacturing operations.We are a tight-knit team with a passion for the physical world, spanning across vehicles, machinery, and aerospace. Our group comprises graduates from esteemed institutions such as Stanford, Berkeley, CDTM, and TUM. We are proud recipients of accolades including Stanford TreeHacks and prestigious scholarships like Fulbright & Haniel. Our diverse backgrounds range from robotics and race car development to creating software applications with millions of downloads.Supported by visionary founders from industry giants like Amazon, Facebook, and Stripe, as well as influential investors such as General Catalyst and Neo, our mission is to revolutionize how manufacturing operates. Currently, we are saving our clients millions, but we believe this is just the beginning of our journey.Your RoleAs the Founding Full-Stack Engineer, you will be instrumental in developing Dryft’s decision intelligence systems. Your work will involve creating scalable architectures that integrate agent-based reasoning, mathematical optimization, and simulation on vast industrial datasets.

Founding Engineer – Baton AILocation: San Francisco, CA (In-Person)Experience Level: 3+ years (Full-Stack Engineering)About Baton AIBaton AI (getbaton.ai) is revolutionizing enterprise automation with a cutting-edge platform designed for seamless cross-application workflows. Our mission is to empower solutions engineering and implementation teams by automating customer onboarding and product setup, allowing them to deliver value at a faster pace and scale. This is just the beginning of our expansive vision for enterprise-wide, AI-driven automation.As a rapidly growing, VC-backed startup, we are seeking visionary builders who are eager to innovate, take initiative, and play a key role in shaping the future of AI automation.Your ResponsibilitiesLead Development of Core Systems – Architect and develop essential components of our full-stack web application, API infrastructure, and AI-enabled automation platform.Tackle Advanced Technical Challenges – Engage in complex tasks involving AI agents, prompt engineering, evaluation, monitoring, API integration, and browser automation.Influence Product Direction – Work closely with early adopters and the founding team to shape our technical roadmap and implement impactful features.Embrace Rapid Learning and Prototyping – Innovate, experiment, and deliver solutions swiftly in a high-trust, streamlined environment.Our Ideal Candidate3+ Years in Full-Stack Engineering – Strong proficiency in React and Typescript.Expertise in Modern Web Development – Familiarity with React/NextJS and Node.js. Knowledge of Python and Elixir/functional programming is advantageous.Experience with Rich-Text Editors – Previous work on features similar to those found in Notion or be eager to tackle this challenge.Interest in AI and Workflow Automation – A passion for developing AI/LLM-driven applications and automation tools.Product-Oriented Mindset – A commitment to clean code and exceptional user experience.Strong Problem-Solving Skills – Ability to navigate ambiguity and deliver results efficiently.Willingness to Work On-Site – Enthusiastic about collaborating in person in San Francisco.

Join Clipbook in reshaping how leaders engage with the world!As the frontrunner in vertical AI for the $100 billion communications, public relations, and public affairs industries, we are on a remarkable journey.Founded in 2023, we've rapidly established ourselves as the largest AI company in this segment, backed by prominent investors like Mark Cuban, who co-led our seed funding round.Learn more about our achievements:Achieved our first million in ARR through bootstrapping and reached profitability before securing a $3.3 million seed round this year.Currently experiencing over 10% month-over-month growth, on track to triple our ARR this year.Partnering with over 200 clients, including the Boston Consulting Group, Weber Shandwick, the Gates Foundation, and various government agencies nationwide.Planning to raise our Series A in early 2026.Your Role:Architect & Build: Make key architectural decisions and implement solutions across the stack (NextJS, TypeScript, React, Python, Node, SQL/NoSQL). You will bring concepts to life, deploying solutions that delight our clients.Collaborate with Customers: Engage directly with users to understand their challenges, iterate swiftly, and provide impactful solutions.Address Diverse Engineering Challenges: Work spans AI, data engineering, and backend development, providing opportunities to tackle projects that align with your strengths. Examples include:AI/ML Integration: Implement LLMs and classical ML models for real-world applications with high uptime. Utilize cutting-edge generative AI tools and frameworks.Data Engineering: Develop pipelines and infrastructure for managing large, multi-modal datasets.Shape Clipbook’s Engineering Culture: As an early team member, you will set engineering standards, mentor future hires, and drive best practices in code quality, testing, and deployment while shaping the team’s culture.

Join our client's innovative team as a Founding Full-Stack Engineer.Location: San Francisco (On-site)We are seeking a talented individual with 3 to 10 years of experience in software development, particularly with expertise in Python, Django, Go, and React.This role is perfect for someone looking to make a significant impact at an early-stage startup as we progress from Seed to Series B funding.

About OliveAt Olive, we are revolutionizing the way companies build internal tools by enabling them to create sophisticated applications simply by expressing their needs in natural language.Internal tools are crucial for modern organizations, serving as the operational backbone for various functions, from sales dashboards to trust and safety workflows. Currently, the process of developing these tools is cumbersome and time-consuming, often draining engineering resources.Our innovative platform leverages advanced large language models (LLMs) and code generation techniques to assemble fully functional internal tools in mere minutes, seamlessly integrated with company data. This empowers businesses to gain deeper insights and enhance their operational efficiency.Having secured a $2.1M seed funding from esteemed investors and industry pioneers, we are now in an exciting phase of expanding our team.This position offers a unique chance to contribute to a transformative project that demands both skill and speed. If you are passionate about making a significant impact, we encourage you to apply.

About Pax HistoriaPax Historia is an innovative alternate-history sandbox game that allows players to select a country and a pivotal moment in time, enabling them to rewrite history. Imagine a world where Rome never fell, the Soviet Union thrived, or Genghis Khan reigned longer.Supported by Y Combinator, Pace Capital, and Z Fellows, our game has amassed nearly 20 million rounds played and is experiencing rapid growth. Your contributions will impact a product enjoyed by hundreds of thousands of players.Our CultureMany of our players discover Pax Historia through word-of-mouth, YouTube reviews, and other organic channels, and they return because of our commitment to building an exceptional game. We want every team member to share this passion. History enthusiasts are particularly welcome, but we encourage anyone who can articulate their excitement about our game to apply.As a small company, you will collaborate closely with the cofounders and a select group of employees. We seek self-motivated individuals who are team players and ready to champion their ideas. The leadership style here values autonomy, allowing you to thrive without micromanagement.Flexibility is crucial in our fast-paced environment. As we scale, be prepared to address various challenges that arise.Your RoleWe are looking for a full-time web developer to join us on-site in San Francisco (Dogpatch). You will report directly to the cofounders. This role is intensive, with an expected commitment of 50-60 hours per week initially, transitioning to potentially fewer hours as you settle in. While we prefer candidates who can commit to in-person work, there may be slight flexibility for hybrid arrangements (e.g., 1 day per week remote). Your schedule will have some flexibility.As a web developer, you will play a key role in enhancing the customer experience on paxhistoria.co.Given our small team size, you will also be expected to assist with various ad-hoc projects as they arise. This is a dynamic, evolving role!

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.

Krew is revolutionizing the credit-servicing industry with the most advanced AI-driven credit-servicing agents. Backed by Long Journey Ventures and a roster of strategic angel investors, including notable figures like Ryan Hoover, Charlie Songhurst, and Michael Jones, we are a highly skilled team comprised of alumni from prestigious organizations such as Figure Robotics, Optiver, and the United Nations.Our omnichannel agents are already supporting over 100,000 consumers on their journey to financial wellness, and we aim to address more than $1 trillion in consumer delinquencies globally, adopting a compassionate and human-centric approach to financial health.Job Overview:We are in search of a talented Full Stack Engineer who is a key member of our technical team. You will thrive in a fast-paced environment and appreciate the value of high-quality code while collaborating with a forward-thinking team.Key Responsibilities:Develop and implement front-end interfaces using Next.jsCreate and maintain backend APIs and services that drive our AI agents and operational tools, primarily utilizing Python (FastAPI)Deliver user-facing features from concept to deployment, ensuring seamless integration across data models, APIs, and UIEnhance system reliability, observability, and performance throughout the tech stackCollaborate closely with design, operations, and compliance teams to ensure the delivery of secure and compliant featuresConduct testing, enforce high code quality standards, and engage in design and code review discussionsContribute to the evolution of our engineering standards and product development processesMinimum Qualifications:Minimum of 2 years of full-time professional experience in full-stack engineeringProficiency in backend development using Python or GoDemonstrated commitment to code quality through testing, code reviews, and documentationPreferred Qualifications:Experience in FinTech, Risk Management, or Compliance is advantageous but not required

About HappyRobotHappyRobot is pioneering the AI-native operating system for the real economy—an innovative platform that seamlessly integrates intelligence with actionable outcomes. By harnessing real-time insights, specialized AI agents, and a coordinating intelligence, we empower enterprises to manage intricate, mission-critical operations with genuine autonomy.Our AI OS continuously accumulates knowledge, optimizes processes at every level, and adapts over time. We're initially focusing on supply chain and large-scale industrial operations, where resilience, speed, and ongoing enhancement are paramount—liberating humans to concentrate on strategic thinking, creativity, and other high-value pursuits.Discover more about our vision in our Manifesto. HappyRobot has successfully secured $62M in funding to date, including a recent $44M Series B round in September 2025. Our esteemed investors include Y Combinator (YC), Andreessen Horowitz (a16z), and Base10, who share our commitment to transforming enterprise operations. We are channeling this investment into assembling a world-class team—individuals with unwavering determination, exceptional problem-solving abilities, and a passion for pushing boundaries in a dynamic, high-pressure environment. If this resonates with you, we invite you to join us at HappyRobot.About The RoleAt HappyRobot, Full Stack Engineers take charge of significant components of the product and infrastructure from start to finish.We are seeking creators who thrive in uncertain environments, have a profound appreciation for their craft, and desire authentic ownership over their creations.

About Tacit Tacit is an early-stage deep tech startup based in San Francisco, focused on hardware that changes how people interact with computers. Backed by General Catalyst, Khosla Ventures, and Greylock Partners, the team brings experience from Stanford, BrainGate, Oculus, and Tesla. The company is committed to solving complex engineering problems to deliver new products that push the boundaries of human-computer interaction. Role Overview The Full-Stack Software Engineer will help turn ambitious ideas into real products, working across Tacit's software stack. This role involves taking features from initial concept through to deployment and shaping user experiences that support the company’s mission. What You Will Do Develop the internal product stack to improve workflows and prototypes across devices and companion clients. Build and expand internal applications for demos and data collection, supporting idea testing and user experience validation. Prototype new features for human-computer interaction, iterate with test users, and refine until the experience feels seamless. Design and run product experiments, including A/B tests and feedback loops, to quickly gather insights and guide product direction. Streamline data collection and participant experiences, including setup flows, session reliability, metadata capture, monitoring, and labeling. Develop demo features that showcase real-time sensing and inference in engaging, reliable ways. Find and implement integrations that improve team workflows and efficiency. Create and improve automated testing and release systems, such as CI/CD pipelines, smoke tests, and regression checks, to support frequent updates. Work closely with machine learning, hardware, and industrial design teams to define requirements, deliver results, troubleshoot, optimize, and ensure reliability. Qualifications Strong skills in Python (FastAPI, Pydantic; experience with pandas or numpy) and modern TypeScript/React. Experience building production backends (APIs, data models, reliability, observability) and delivering features for end users. History of shipping multiple products from start to finish.

About TaktOur Vision: A world where factories are intelligent.At Takt, we are revolutionizing manufacturing by developing the cognitive capabilities of factories.Despite a decade of digitization efforts involving sensors, software, and dashboards, many factories remain unintelligent. Data is often scattered across various disconnected systems, trapped in reports, and reliant on the unwritten know-how of individuals.The challenge lies not in data collection, but in transforming this data into actionable institutional intelligence.Takt is advancing the manufacturing landscape by seamlessly integrating AI agents with deep operational context throughout the entire production stack. Our systems analyze what is happening, why it is occurring, and what actions to take, acting as a continuous strategic advisor for factory leadership across sales, operations, supply chain, and finance.This is not merely another chatbot or analytics tool; we are at the forefront of AI reasoning and decision-making in critical, real-world environments. Just as Tesla redefined automobiles as software-centric systems, Takt is transforming manufacturing into a software-driven industry.FundingTakt is proudly backed by Pear VC (investors in Doordash and Gusto) and is a participant in the PearX accelerator program.Visit our website: www.taktconnect.comFoundersTakt was founded by Adhitya Raghavan (CEO) and Will Zunker (CTO). Adhitya's journey from a small village in South India to leading Takt is fueled by his personal experiences on factory floors. His path led him through prestigious institutions such as Princeton (Mechanical & Aerospace Engineering), Harvard (MBA, Baker Scholar), and Bain, and now he is committed to addressing the $8 trillion waste problem in the manufacturing sector.

Join Campfire as a Full Stack Engineer and play a pivotal role in transforming the accounting software industry. Based at our San Francisco headquarters, this in-office position invites you to collaborate closely with our talented team five days a week. About CampfireAt Campfire, we are driven by our mission to revolutionize accounting software, offering innovative solutions to startups and mid-sized tech companies. As proud graduates of Y Combinator's Summer 2023 cohort, we have secured support from esteemed investors like Foundation Capital and are witnessing rapid growth in our customer base.Your Role As a key member of our engineering team, you will be instrumental in designing and building our mission-critical software that enhances customer experiences. What We’re Looking ForWe seek an individual who: Possesses a strong foundation in Python, NextJS/React, and Tailwind.Thrives in a fast-paced, agile environment with minimal structure.Values autonomy, is self-motivated, and can effectively lead projects to completion. Ideal CandidateYou're driven not just by the prospect of a job, but by the desire to tackle challenges head-on. You're passionate about developing user-centric solutions and eager to collaborate, learn, and grow within a dynamic startup culture. How to ConnectIf you believe you’re the right fit, we want to hear from you! Share your journey with us and let’s discuss how you can contribute to igniting change at Campfire.‍ BenefitsWe offer exceptional benefits including 100% premium coverage for employees and 80% for dependents, along with comprehensive healthcare and dental options.

About the RoleJoin us as a Full Stack Engineer at nash, where you will be instrumental in crafting, enhancing, and scaling our innovative product offerings. Collaborate closely with our CTO, co-founder, and dedicated engineering and product teams to spearhead the development of new features across our technology stack, elevating both the user experience on the frontend and the robustness of our backend systems. This is a unique opportunity to be part of nash during a pivotal growth phase, as we create solutions for enterprises and small to medium businesses across the logistics value chain.Key ResponsibilitiesDesign, develop, and manage scalable web applications throughout the entire stack.Create and optimize responsive and high-performance user interfaces.Build and maintain backend services and APIs that fuel our platform.Collaborate with product, design, and engineering teams to quickly build, test, and iterate on features within our existing platform.Diagnose and resolve production issues across our systems, ensuring reliability and performance.Promote best practices in code quality, testing, and maintainability.Independently and collaboratively tackle complex technical challenges.QualificationsA minimum of 4 years of experience in building and deploying full-stack web applications.Proficient in React (or similar frontend frameworks) and Python.Experience with GraphQL, RESTful APIs, and database management (SQL and NoSQL).Strong grasp of modern frontend development principles, including TypeScript, React, component-driven architecture, and contemporary tooling.Familiarity with cloud platforms (AWS, GCP, or Azure) and best practices for deployment.A passion for delivering exceptional user experiences and developing scalable backend systems.Excellent problem-solving capabilities and the ability to work autonomously in a dynamic environment.Preference for candidates located in the Bay Area, as nash operates a hybrid-first product team with an office in San Francisco.Startup experience is a plus, but not mandatory.Bonus: Experience with Flask, SQLAlchemy, WebSockets, and integration-heavy systems.

Join Plaud as a Senior Full Stack Engineer and contribute to innovative software solutions that make a difference. This role offers the opportunity to work in a dynamic environment where you will collaborate with cross-functional teams to design, develop, and implement web applications.

Join our dynamic team at Plaud as a Full Stack Engineer, where you will play a crucial role in designing and developing innovative web applications. We are looking for a talented engineer who is passionate about technology and eager to solve complex problems in a collaborative environment.

At Siftstack, we are revolutionizing the development, testing, and operation of modern machines. Our innovative platform empowers engineers with real-time observability over high-frequency telemetry, effectively eliminating bottlenecks and facilitating faster, more dependable development.Founded by a team of experts from SpaceX, Google, and Palantir, Siftstack was inspired by our experience with pioneering projects like Dragon, Falcon, Starlink, and Starship. Our mission-critical infrastructure is designed for precision and scalability, meeting the highest demands of reliability in engineering.As an early-stage engineer at Siftstack, you will not only write code, but you will also play a pivotal role in defining our architecture, shaping our product, and cultivating a culture focused on addressing real engineering challenges. If you thrive on tackling complex technical problems and want to build foundational systems that support intricate machines, we'd love to hear from you.