Full Stack Software Engineer at Siftstack | San Francisco

Join Coderabbit as a Full Stack Engineer and be at the forefront of technological innovation. As a key member of our development team, you will design, develop, and maintain web applications that enhance user experience and drive business success.

About CodeRabbitCodeRabbit is a pioneering research and development firm that specializes in crafting highly efficient human-machine collaboration systems. Our mission is to develop the next wave of AI-driven code review solutions—a collaborative synergy between human creativity and advanced algorithms that surpasses the capabilities of individual engineers. By integrating state-of-the-art language models with human insight, we aim to redefine the standards of software development efficiency and quality.Role OverviewAs a DevOps Engineer at CodeRabbit, you will be instrumental in scaling, securing, and fortifying the infrastructure that supports our AI-powered developer tools. Collaborating with our platform engineers, backend team, and applied AI specialists, you will ensure our systems are robust, observable, high-performing, and easy to deploy.This position is hands-on and tailored for an individual who excels in a dynamic environment, takes initiative in managing critical infrastructure, and is eager to develop tools that empower an ambitious engineering team.ResponsibilitiesDesign, implement, and manage scalable CI/CD pipelines.Develop and oversee infrastructure as code (e.g., Terraform, Pulumi).Enhance system reliability through effective monitoring, alerting, logging, and failover strategies.Collaborate with platform and backend teams to identify and mitigate performance bottlenecks.Contribute to deployment workflows, environment automation, and developer tooling enhancements.Ensure that infrastructure security and compliance measures are rigorously enforced.

Join CodeRabbit as Our Lead Security EngineerAt CodeRabbit, we are at the forefront of innovation in research and development, dedicated to creating groundbreaking human-machine collaboration systems. Our vision is to revolutionize the future of software development through the integration of Gen AI-driven code reviewers, facilitating an unparalleled partnership between human creativity and advanced algorithms. By harnessing the power of language models and human intellect, we aim to redefine efficiency and quality in software development.Position Summary:We are seeking a seasoned Lead Security Engineer to join our mission of empowering developers with high-performance tools in a rapidly evolving threat landscape. In this pivotal role, you will be responsible for architecting, fortifying, and safeguarding our infrastructure and ecosystem.As the Lead Security Engineer, you will infuse security into all aspects of our product and infrastructure, serving as the guardian of resilience, incident response, and proactive defense at scale.Key Responsibilities:Define the Security Roadmap: Develop and implement a strategic security engineering plan that aligns with CodeRabbit’s agile engineering processes.Enhance Resilience: Advocate for defense-in-depth strategies, including threat modeling, secure design reviews, hardening, and CI/CD integration.Lead Incident Response: Take charge of security incident response and recovery, ensuring effective triage, resolution, and root cause analysis to bolster system integrity.Security Tools & Automation: Develop or integrate security tools (SAST, DAST, SIEM, EDR, monitoring) seamlessly into the developer workflow to maintain high delivery velocity.Integrate Security Practices: Collaborate with engineering and product teams to ensure secure practices are incorporated early in project planning and daily operations.Cultivate Talent & Culture: Contribute to hiring, coaching, and mentoring a resilient security engineering team while promoting security awareness throughout the organization.Establish Compliance & Policy: Develop security standards, frameworks, and processes that evolve with our growth while remaining streamlined and developer-friendly.Qualifications:Proven Experience: 8+ years in security engineering, incident response, or related fields. Leadership experience during critical situations is a plus.Technical Proficiency: In-depth knowledge of security best practices, threat modeling, and incident management.Collaborative Mindset: Strong interpersonal skills and the ability to work effectively across multidisciplinary teams.Adaptability: Eagerness to learn and adapt in a dynamic and fast-paced environment.

Join CodeRabbit as a Senior DevOps Engineer!At CodeRabbit, we are at the forefront of research and development, crafting cutting-edge systems for human-machine collaboration. Our mission is to revolutionize software development by creating the next generation of AI-driven code review tools. These advancements represent a powerful synergy between human creativity and advanced algorithms, allowing us to maximize productivity and elevate code quality to unprecedented heights.As a Senior DevOps Engineer, you will be instrumental in scaling, securing, and optimizing the infrastructure that fuels our AI-powered developer tools. Collaborating closely with our platform engineers, backend developers, and applied AI teams, you will ensure our systems are robust, efficient, and easy to deploy, all while maintaining high standards of observability and resilience.This position is ideal for a proactive individual who thrives in dynamic environments, takes initiative with critical infrastructure, and is passionate about developing tools that empower an ambitious engineering team.

About CodeRabbitAt CodeRabbit, we are at the forefront of research and development, dedicated to innovating human-machine collaboration systems. Our mission focuses on developing the next generation of AI-driven code reviewers, fostering a harmonious partnership between human creativity and advanced algorithms that far exceed the capabilities of any single engineer. By merging sophisticated language models with human insight, we aim to revolutionize the efficiency and quality of software development.About The RoleWe are seeking a dynamic Director of Demand Generation who will establish a consistent pipeline and a self-sustaining revenue stream for our developer-centric product. This role encompasses ownership of the entire demand generation system, from customer acquisition and conversion to lifecycle management and revenue generation.In this position, you will spearhead strategic initiatives and execution, while scaling operations through the recruitment and mentorship of a small, high-performance team. A hands-on approach is essential as you will engage with tools and workflows related to list building, enrichment, and orchestration, utilizing platforms like Clay.You will collaborate closely with teams across Product Marketing, Product Development, Sales, RevOps, and Design to translate technical value into user activation, growth, and revenue generation.ResponsibilitiesDemand Strategy and Targets: Lead marketing-sourced outcomes, focusing on Product Qualified Leads (PQLs), self-service revenue, and sales-assisted pipeline, while meeting quarterly targets and managing budget allocations.Campaign Leadership: Design and execute integrated campaigns across key use cases, segments, and personas, ensuring alignment of messaging, offers, and conversion paths with Product Marketing Managers and content teams.Channel Ownership: Oversee performance across various channels including paid search, paid social, retargeting, SEO, and collaborative marketing efforts with partners, optimizing successful strategies for scale.Funnel Management and Conversion Rate Optimization (CRO): Enhance conversion rates from initial clicks to signups or installations, leading landing page strategy and experimentation to improve conversion metrics.Lifecycle Management and Product-Led Growth (PLG): Work in tandem with Product and Growth teams to define activation events and PQL thresholds, developing lifecycle programs that boost time-to-value, retention, and expansion.Modern Outbound Workflows Using Clay: Create and manage enrichment and orchestration workflows through Clay, including account list building, scoring, personalization parameters, and CRM routing with safeguards.Measurement and Reporting: Establish clear stage definitions and dashboards to monitor success metrics, partnering with analytics teams for data-driven insights.

About CodeRabbitAt CodeRabbit, we are at the forefront of innovation, dedicated to developing cutting-edge systems that enhance human-machine collaboration. Our mission is to redefine the future of software development through the creation of advanced AI-driven code reviewing tools. By merging sophisticated algorithms with human creativity, we aim to elevate the efficiency and quality of software engineering practices.Role OverviewAs an Enterprise Solutions Engineer, you will act as a key technical consultant and advocate for our clients. Collaborating closely with Sales, Product, Engineering, and Customer Success teams, you will guide customers through their pre-sales journey, helping them recognize the transformative value of CodeRabbit's solutions. This role is ideal for individuals who are technically inquisitive and enthusiastic about developing AI-integrated solutions throughout the Software Development Life Cycle (SDLC). Join us in a dynamic, collaborative work environment where your contributions will make a significant impact on our customers' success.Key Responsibilities:Partner with Account Executives to comprehend customer needs and craft tailored technical solutions.Convert business goals into technical specifications and solution architectures.Lead engaging demonstrations and impactful Proof of Value (PoV) sessions to effectively communicate the benefits of the CodeRabbit platform.Assist in addressing security-related inquiries from clients.Continuously provide constructive feedback and work cross-functionally with product and engineering teams to resolve customer challenges and enhance the user experience.Stay informed about industry trends and emerging technologies in AI-powered development tools.Contribute to the enhancement of internal resources, including playbooks, guides, and best practices.Facilitate the transition from pre-sales to post-sales, ensuring a seamless onboarding experience for customers.

About CodeRabbitCodeRabbit is a groundbreaking research and development firm dedicated to creating highly efficient human-machine collaboration systems. Our mission is to develop the next generation of AI-driven code review tools that foster a collaborative relationship between human developers and advanced algorithms, yielding superior outcomes compared to individual efforts. We leverage state-of-the-art language models combined with human creativity to redefine the standards of software development efficiency and quality.Role OverviewAs a Backend Software Engineer at CodeRabbit, you will play a pivotal role in crafting advanced AI applications that transform the code review landscape. Your work will be situated at the convergence of intelligent systems and software engineering, enabling developers to rapidly iterate within intricate environments. Your skills will be invaluable in designing solutions that improve code quality, scalability, and developer productivity.In this position, you will architect and develop essential backend systems that drive our AI agent workflows, context-aware code reviews, repository planning tools, and dashboard interfaces. Collaborating with AI researchers, infrastructure experts, frontend developers, and product strategists, you will contribute to building robust, intelligent backend systems that scale effectively to support our tools for developers.

About CodeRabbitCodeRabbit is a pioneering research and development firm dedicated to creating highly efficient human-machine collaboration systems. Our mission is to develop the next generation of AI-driven code review tools, fostering a harmonious partnership between human creativity and advanced algorithms that far exceed the capabilities of individual engineers. By merging language models with human innovation, we aim to elevate the standards of efficiency and quality in software development.The RoleWe are in search of a talented Site Reliability Engineer (SRE) to become a vital part of our Platform Engineering team located in the Bay Area. In this role, you will play a crucial part in maintaining the high availability, performance, and scalability of CodeRabbit's AI-enhanced code review platform. This position lies at the nexus of software engineering and systems operations, where you will construct the foundational platforms and automation that empower our engineering teams to deploy, monitor, and scale our services with reliability.As a Site Reliability Engineer at CodeRabbit, your responsibilities will include improving the reliability of our essential services that handle millions of code reviews, developing sophisticated automation platforms, and managing the infrastructure that drives our AI analysis engine. You will engage with cutting-edge technologies such as large language models, real-time processing systems, and distributed architectures that function at scale.Key ResponsibilitiesInfrastructure & Platform OwnershipDesign, implement, and maintain scalable infrastructure on Google Cloud Platform to accommodate CodeRabbit's expanding user base and processing needs.Take ownership of and operate essential platform services.Develop and manage Infrastructure as Code using Terraform to guarantee consistent, reproducible, and version-controlled infrastructure deployments.Reliability & Performance EngineeringEstablish and uphold SLI/SLO frameworks for all critical services, ensuring we fulfill our reliability commitments to users.Implement comprehensive monitoring, alerting, and observability solutions utilizing Datadog and custom instrumentation.Conduct in-depth incident response, root cause analysis, and post-mortem processes to continually enhance system reliability.Optimize application and infrastructure performance to manage millions of pull request analyses with minimal latency.

About CodeRabbitAt CodeRabbit, we are pioneering research and development efforts aimed at revolutionizing how humans and machines collaborate. Our mission is to engineer the next wave of AI-driven code reviewers that harness the strengths of both human ingenuity and sophisticated algorithms, resulting in software development processes that are not only efficient but also of superior quality.The RoleAs the Mid-Market Sales Manager, you will be at the forefront of driving and scaling revenue within our mid-market division. You will lead a dedicated team of Account Executives, enhance forecast accuracy, and implement effective sales strategies that yield consistent results.This position balances hands-on execution with strategic optimization: mentoring your team to achieve immediate success while refining the systems that will fuel future growth.What You’ll DoRevenue OwnershipTake ownership of mid-market revenue targets and drive sustainable growth.Ensure a robust pipeline and effective conversion rates at all stages.Guide deals through late-stage negotiations, pricing, and closure.Provide accurate forecasts on a weekly, monthly, and quarterly basis.Develop new sales processes and programs to enhance pipeline and bookings.Team ManagementLead and mentor a team of Mid-Market Account Executives.Implement best practices in discovery, MEDDICC, and value-based selling techniques.Conduct one-on-one meetings, pipeline assessments, deal evaluations, and forecasting discussions.Collaborate with Enablement to recruit and onboard new Account Executives.Process & ScaleStandardize and enhance the mid-market sales processes.Work with RevOps to improve CRM management, dashboards, and key performance indicators.Partner with the Marketing team to ensure high-quality leads and effective campaigns.Collaborate with Customer Success to ensure smooth handoffs, identify expansion opportunities, and manage renewals.Cross-Functional ImpactProvide actionable feedback to Product regarding roadmap gaps and buyer concerns.Share competitive insights and positioning with go-to-market leadership.Contribute to strategies for pricing, packaging, and territory management.

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

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

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

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.

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.