Backend Software Engineer at ema | San Francisco Bay Area

Join the Vanguard of Offensive SecurityBishop Fox is a premier authority in offensive security, delivering a wide array of solutions including continuous penetration testing, red teaming, attack surface management, and comprehensive assessments of product, cloud, and application security. With an impressive portfolio, we've collaborated with over a quarter of the Fortune 100, half of the Fortune 10, and eight of the top 10 global technology companies, as well as all leading global media organizations. Our managed service platform, innovative offerings, and a culture dedicated to excellence have earned us accolades from respected industry awards, including Fast Company, Inc., SC Media, and many others. For over 16 years, we've been committed to advancing the security community, contributing more than 16 open-source tools and 50 security advisories in just the last five years. Discover more at bishopfox.com or follow us on our social media channels.Who You AreThis role transcends typical engineering positions. You will become a key player in an innovative team that operates like a startup within Bishop Fox, combining the agility and rapid iteration of an early-stage venture with the robust resources and reputation of a security leader.You are a seasoned AI engineer who excels in developing real-world systems that function effectively within chaotic environments. Your focus is on reliability, evaluation, and scalability—ensuring that solutions consistently perform in production, not just once.Your MissionCreate autonomous AI agents capable of detecting genuine vulnerabilities in live applications, with the intelligence and adaptability akin to the world’s top penetration testers.

Backend Software Engineer – AI Applications San Francisco Bay Area | Hybrid (3 days onsite, 2 remote)About TrueMeterAt TrueMeter, we are revolutionizing the way businesses manage their energy costs. The U.S. power grid was not designed for the AI era, and we are here to change that. With the rising demand for data centers and the lagging adoption of renewable energy, many businesses are facing increasing utility bills. Our solution? The AI Energy Agent—a system that simplifies and reduces energy costs by consolidating multiple utility bills into a single, affordable subscription. Since our MVP launch in May 2024, we have successfully onboarded millions in energy spending from notable brands. As a seed-stage startup backed by prominent Silicon Valley investors, we are poised for rapid growth.If you are passionate about developing AI-driven systems that can make a significant impact on the planet, we want to hear from you!The RoleWe are seeking a Backend Software Engineer (AI Applications) who thrives in fast-paced, early-stage environments. In this role, you will transform ideas and prototypes into functional systems in a matter of days.You will be responsible for creating the backend infrastructure that powers our AI Energy Agent, including LLM-driven systems that analyze, structure, and interpret energy data. This includes integrating with multiple utility APIs, managing data pipelines, and developing services that ensure our AI solutions are effective and reliable.You will collaborate closely with the co-founder/CTO and a talented team of engineers, designing scalable backend systems that can grow from 10 customers to 10,000, all while taking ownership of your work and delivering with pride.What You Will CreateAI-Driven Backends: Develop production systems that connect LLMs and coding agents to our data and product APIs.Service Architecture: Design and implement fast, secure microservices using Python (and optionally TypeScript).Data Integration: Build reliable connectors to energy company portals and public data sources.Infrastructure for Intelligence: Help architect the backend infrastructure that enables AI agents to read, reason, and act autonomously across our data stack.Performance & Scalability: Own systems that are designed to operate 24/7 with low latency and high reliability.

Join Our MissionThe trucking and logistics sector is essential to our economy, yet its payment infrastructure is outdated and inefficient. At AtoB, we are on a mission to revolutionize payment systems for this industry. We've identified the challenges faced by hardworking professionals in trucking — from outdated tools to hidden fees, and we are committed to delivering solutions that prioritize their needs.About AtoBOur goal is to create a seamless payment experience akin to Stripe, tailor-made for the transportation industry. We understand the critical role of timely capital movement in supply chains and strive to ensure it happens smoothly and fairly. Every product we develop enhances user experience and works intelligently within the unique constraints our customers face daily, whether they are fleet managers or drivers.Our ExpertiseOur founding team boasts extensive experience in the tech and payments landscape, with backgrounds from industry leaders like Cruise Automation, Uber, Google, Meta, and Stripe. We've attracted over $125 million in funding from prominent investors, including General Catalyst, Y Combinator, and major tech founders, positioning us as a leader in innovation within our sector.Recognized by Forbes as one of the Next Billion-Dollar Startups, we are also proud to join the World Economic Forum as a Global Innovator.

Join Us at Retell AIRetell AI is revolutionizing the call center industry by leveraging innovative voice AI technology based on first principles.In just 18 months since our inception, we have attracted thousands of companies that rely on Retell's AI voice agents to efficiently manage sales, support, and logistics calls, previously handled by large teams of human agents. Supported by renowned investors such as Y Combinator and Alt Capital, we have rapidly grown from $5M to $36M in Annual Recurring Revenue (ARR) with a dedicated team of 20.Looking ahead to 2026, our ambition is to establish a state-of-the-art customer experience platform entirely powered by AI. We aim to create intelligent AI “workers” capable of serving as frontline agents, quality assurance analysts, and managers, continuously optimizing customer interactions without the need for constant human oversight.We are on an exciting growth trajectory and are seeking driven individuals who are eager to solve complex technical challenges, accelerate progress, and make a significant impact at one of the fastest-growing voice AI startups.Let’s innovate the future together!Ranked as a top 50 AI app by a16z: https://tinyurl.com/5853dt2x#4 on Brex's Fast-Growing Software Vendors of 2025: https://www.brex.com/journal/brex-benchmark-december-2025One of the top startups on: https://leanaileaderboard.com/

About HexusAt Hexus, we are dedicated to unlocking the hidden potential of AI and personalization for businesses. Our passion lies in revolutionizing product-led growth, transforming how companies connect with their customers, thereby enhancing product adoption and ensuring long-term success. With a robust suite of AI-driven tools, Hexus enables businesses to optimize their PLG strategies across Sales, Marketing, and Customer Experience.Supported by leading investors, industry experts, and renowned angel investors, our team is spearheaded by former FAANG founders with extensive experience in SaaS, ML, and UX. Join us in our mission to redefine customer experiences through AI and personalization.Your RoleAs a dynamic, design-driven startup, we are seeking a talented Senior Product Engineer to join our early-stage team. You will be instrumental in actualizing our product vision by creating clean, intuitive UI and UX, developing robust editing tools, and ensuring top-notch performance. We seek an individual who raises the bar for what’s achievable online and is passionate about crafting exceptional responsive, interactive, and enjoyable user experiences.In this role, you will:Collaborate closely with the founding team to design engaging user experiences.Execute critical projects that empower our customers daily.Rapidly prototype and iterate on new features and functionalities, driving ongoing innovation.Architect efficient and reusable frontend systems that support complex web applications.Contribute to shaping the direction of our design-led product.Qualifications5+ years of experience in frontend development.Proficiency in front-end development using TypeScript, React, NextJS, and Node.js.Strong skills in design and styling with frameworks like Tailwind or Material Design.Comprehensive understanding of the entire web stack, including protocols and web server optimization techniques.Familiarity with modern deep learning models (GPT, LLAMA, BERT, Whisper, Stable Diffusion, etc.).Capacity to grasp user challenges and convert them into features and products.A desire to thrive in a fast-paced, iterative startup environment.

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.

Dapster is actively seeking a Lead Hardware Engineer to become a pivotal part of our dynamic team. As a rapidly growing startup, this position offers the unique opportunity to influence our foundational technologies and products.About Dapster: We are dedicated to revolutionizing the market with AI-driven robotic picking solutions. Recently, we secured a significant pilot project with a top retailer, providing us with dilution-free funding to further develop our core technology.If you're eager to engage in innovative work alongside a talented and humble team, and want to share in the rewards of joining us at such an early stage, we’d love to hear from you!

Bishop Fox is a premier authority in offensive security, delivering a wide array of solutions including continuous penetration testing, red teaming, and comprehensive assessments of product, cloud, and application security. Our esteemed clientele includes over a quarter of the Fortune 100, half of the Fortune 10, eight of the top 10 global technology firms, and all leading global media companies. Our managed service platform, innovative service offerings, and commitment to excellence have earned us numerous accolades from industry award programs such as Fast Company, Inc., and SC Media. For more than 16 years, we have actively contributed to the security community, publishing over 16 open-source tools and 50 security advisories in the past five years alone. Discover more at bishopfox.com or connect with us on social media.Who You AreThe Agentic AI Software Engineer in Cybersecurity Systems is tasked with designing, developing, and deploying cutting-edge AI-driven software solutions aimed at enhancing cybersecurity detection, response, analysis, and automation capabilities. In this role, you will focus on constructing and maintaining agent-based AI systems proficient in autonomously generating code, performing security analyses, triaging alerts, identifying vulnerabilities, and proposing remediation strategies, all under structured human oversight and validation.This position demands advanced expertise in computer science, artificial intelligence, machine learning, secure software engineering, distributed systems, and cybersecurity principles. You will be engaged in complex system design, secure AI integration, and the creation of enterprise-grade security automation platforms.

Senior Product Engineer (Full-Stack)About embedding-vcOpenArt, a pioneering platform at embedding-vc, utilizes AI to revolutionize storytelling and visual creation, serving millions across the globe. We are on a mission to develop the future of creative tools enhanced by advanced AI technology, enabling users to craft videos, visuals, characters, and narratives with unprecedented speed and ease.Why Choose to Work with Us?Join a small, dynamic team where senior engineers take full ownership of significant systems from start to finish.Experience rapid deployment at scale — your contributions will impact millions.Be part of a founder-led engineering culture that values deep involvement in product and architectural decisions.Engage with an AI-native product that is at the forefront of transforming advanced models into tangible user experiences.Thrive in a low-process, high-trust environment where your judgment, clarity, and speed are paramount.Your RoleWe are seeking a Senior Product Engineer (Full-Stack) to take charge of intricate, user-facing systems from conception to execution. This multifaceted role requires proficiency across frontend UX, backend systems, APIs, and data models, allowing you to balance product speed, scalability, and long-term sustainability effectively.You will collaborate closely with the founders to design, construct, and refine core AI-driven workflows, acting both as a strong technical leader and a thoughtful product strategist.Your ContributionsGuide product features from initial concept and UX design through to backend integration and successful deployment.Architect scalable backend systems, APIs, asynchronous pipelines, and AI inference workflows.Lead system design initiatives with a focus on performance, reliability, and scalability.Create clean, scalable data models across both SQL and NoSQL databases.Develop seamless frontend experiences utilizing React / Next.js.Make informed technical trade-offs and communicate them effectively.Work closely with Product, Design, and Go-to-Market teams.Mentor fellow engineers and elevate the overall engineering standards.Shape architecture, tooling, and engineering best practices.Desired QualificationsEssential SkillsProven full-stack experience with a track record of shipping scalable production systems.Capacity to independently design and deliver complete features.Demonstrated ability to make pragmatic design decisions that balance speed and quality.Excellent communication and collaboration skills to work effectively with diverse teams.Strong problem-solving abilities and a passion for innovation in engineering.

About ArcadeArcade is dedicated to empowering teams to become exceptional storytellers by creating dynamic visual experiences. Our platform is utilized by over 22,000 teams to enhance their product narratives. We are a team of former Atlassian, AngelList, and Shopify professionals who believe in crafting beautiful, user-friendly products that significantly enhance how software companies present their offerings throughout the customer journey.While our team operates globally, we encourage new members to join us in a hybrid working environment based in our San Francisco, CA office. This is preferred but not mandatory.

Responsibilities:Develop Our Product. Take ownership of software features that enhance our AI platform, empowering private market investors to analyze deals swiftly and accurately. This role requires you to actively engage in coding and delivering essential platform components from the ground up.Ensure Quality and Excellence. Establish and maintain coding standards, architectural guidelines, and review procedures; mentor fellow engineers. Co-cultivate a culture centered on practical, reliable, and test-driven development that swiftly meets business requirements.Scale for Growth. Assist in monitoring and scaling the architecture of our platform and its infrastructure.Collaborate Across Functions. Engage closely with product, security, and go-to-market teams to translate our strategic roadmap into actionable features and deliverables.

Join Our Innovative AI LabAt Cognition, we are pioneering the future of software development through applied AI. Our mission is to create advanced software agents that redefine how software is built. In an era where traditional systems still govern operations, we believe there is a better way to innovate and deliver what customers truly need.With our groundbreaking AI software engineer, Devin, we are collaborating with some of the largest global enterprises to enhance their engineering capabilities. Our rapid growth, from $1 million to mid-nine figures in revenue in just one year, reflects the trust of top investors like Founders Fund, General Catalyst, Lux Capital, and 8VC.The RoleAs an AI Analyst, you will spearhead our analytical efforts for CIOs worldwide. Your role will involve researching the evolving AI landscape, including model advancements, product innovations, and shifting economic and geopolitical factors, transforming this knowledge into actionable insights that empower business leaders.You will craft the narratives that inform our executives during high-level meetings and conferences. Your exceptional analytical skills and writing prowess will be essential as you distill complex technical, business, and political elements into compelling arguments that drive decision-making.Key Responsibilities:Conduct thorough research on the AI ecosystem, including model capabilities and competitor products, to produce actionable intelligence.Develop comprehensive frameworks that illustrate Cognition’s unique value proposition and the ROI associated with adopting Devin.Create engaging keynotes, talk tracks, whitepapers, and leadership briefings, while preparing executives for pivotal customer interactions.Collaborate with engineering teams to gather real-world examples that enrich your analysis and insights.Establish thought leadership on the transformative impact of AI agents within large organizations.About You:You have a passion for AI and a knack for analytical thinking, with a background that likely aligns with equity research or a similar field. Your ability to translate intricate ideas into clear narratives makes you an ideal candidate for this pivotal role.

Join the Revolution at Retell AIRetell AI is pioneering the future of call centers through innovative voice AI, driven by first principles thinking.In just 18 months since our inception, we have empowered thousands of businesses with our AI voice agents, transforming how sales, support, and logistics calls are managed—previously requiring extensive human teams. Supported by prestigious investors such as Y Combinator and Alt Capital, we've rapidly scaled from $5M ARR to an impressive $36M ARR with a compact yet dynamic team of 20.Our ambition for 2026 is to create a revolutionary customer experience platform, where entire contact centers are powered by AI. Moving beyond basic automation, we aim to develop intelligent AI “workers” that serve as frontline agents, QA analysts, and managers, continuously enhancing customer interactions without the need for constant human oversight.As we expand, we are seeking passionate engineers who are eager to solve challenging technical problems, act swiftly, and make a significant impact in one of the fastest-growing voice AI startups. Let’s shape the future together.

fractional-ai is looking for a Senior or Staff Software Engineer to join the San Francisco office. This position centers on building advanced AI solutions with a team that values both technical depth and collaboration. Role overview This role focuses on designing and developing AI-driven systems. The work involves solving technical challenges and contributing to projects that push the boundaries of what AI can achieve. Collaboration with other engineers and stakeholders is a key part of daily responsibilities. Who will thrive Experienced engineers with a strong background in software development Those who enjoy working on complex technical problems Individuals who value teamwork and open communication Location This position is based in the San Francisco office.

Join Retell AI as a Senior Machine Learning EngineerRetell AI is at the forefront of revolutionizing the call center industry using groundbreaking voice AI technology. Within just 18 months of our inception, we have empowered thousands of businesses with our AI voice agents capable of managing sales, support, and logistics calls that traditionally required extensive human teams.Supported by renowned investors, including Y Combinator and Alt Capital, our journey has seen us scale from $5M to an impressive $36M ARR with a dedicated team of 20. Our ambition for 2026 is to develop a state-of-the-art customer experience platform, transforming entire contact centers with AI. We are building intelligent AI “workers” that will serve as frontline agents, quality assurance analysts, and managers—constantly executing, monitoring, and enhancing customer interactions.We are rapidly expanding and seeking passionate innovators eager to solve complex technical challenges and make a tangible impact in one of the fastest-growing voice AI startups. Together, let's shape the future of customer interactions.

Join Our Innovative Team at Retell AIRetell AI is at the forefront of revolutionizing the call center industry through advanced voice AI technology. In just 18 months since our inception, we have empowered thousands of businesses to optimize their sales, support, and logistics calls, which previously relied on large teams of human agents. Supported by prominent investors including Y Combinator and Alt Capital, we've achieved remarkable growth, scaling from $5 million to $36 million in annual recurring revenue (ARR) while expanding our talented team to 20 members.Our ambitious vision for 2026 is to develop a state-of-the-art customer experience platform, transforming entire contact centers with AI. Unlike traditional automation that requires ongoing human oversight, we are building intelligent AI "workers" capable of functioning as frontline agents, quality assurance analysts, and managers, constantly enhancing customer interactions.If you are a passionate innovator eager to solve complex technical challenges and make a tangible impact at one of the fastest-growing voice AI startups, we invite you to join us in shaping the future.Ranked among the top 50 AI applications by a16z: a16z List4th on Brex's Fast-Growing Software Vendors of 2025: Brex BenchmarkFeatured as a leading startup on: Leanaileaderboard

Agility Robotics stands at the forefront of robotic innovation. Our groundbreaking robot, Digit, is the first of its kind to be integrated into workplaces worldwide. Our talented team is characterized by its remarkable ability to conceive, design, and implement robots that exhibit advanced mobility, dexterity, intelligence, and efficiency—robots crafted to collaborate seamlessly with humans in environments tailored for them. Daily, we confront engineering obstacles and pioneer innovative solutions that will eventually make robots a common and friendly presence in our lives. This endeavor is not just our passion; it is our duty: our mission is to enhance business productivity and enrich people's lives.About The RoleWe are on the lookout for a Staff Firmware Engineer who will be pivotal in planning the firmware architecture for our robots, designing subsystems, and developing robust and reliable firmware across our entire robot lineup. In this role, you will work in tandem with a diverse team of engineers to comprehend the unique specifications of our products and ensure our robot designs are resilient and primed for production. Additionally, you will act as a key liaison between hardware components and advanced robot control algorithms by documenting interfaces and offering support to fellow engineers.LocationThis position is available at our office in the San Francisco Bay Area. Regular travel to Salem, typically one week per month, will be necessary.About The Work:Contribute to the C++ firmware architecture that powers our robot's low-level sensor network, control systems, and power management.Develop the firmware communication layer utilizing EtherCAT and CAN protocols.Write firmware for the hardware abstraction layer, peripheral drivers, and applications.Conduct real-time hardware testing and debugging with benchtop test equipment such as logic analyzers and oscilloscopes.

fractional-ai is hiring a Software Engineer to join the team onsite in San Francisco. This role centers on building and improving technology that advances artificial intelligence. Role overview As a Software Engineer, you will work closely with others to develop and support projects that drive the company’s AI initiatives forward. The work involves collaborating with colleagues and contributing technical solutions in a team setting. What you will do Develop software for AI-driven projects Collaborate with team members in the San Francisco office Contribute ideas and technical expertise to ongoing initiatives Requirements Interest in technology and artificial intelligence Ability to work onsite in San Francisco Strong motivation to learn and contribute to team projects

Who are we?At Ema, we are pioneering the future of AI technology, empowering employees across enterprises to unleash their creativity and productivity. Our innovative platform enables businesses to delegate repetitive tasks to Ema, the Universal AI employee. Founded by former leaders from Google, Coinbase, and Okta, we are backed by world-class investors and angels. Our headquarters are located in Silicon Valley and Bangalore, and this position offers a hybrid work model with three days in the office each week.Who are you?We are looking for a dedicated Backend Software Engineer to join our dynamic team. You possess a passion for creating maintainable software solutions and are an innovative problem solver who can navigate through complexities. Most importantly, you are eager to contribute to a mission-driven, fast-paced startup that aims to make a significant impact.Your Responsibilities:Design, develop, and maintain enterprise software applications, focusing on APIs, data processing, and service development.Write clean, efficient, and maintainable code using a test-driven development approach.Construct scalable and reliable backend systems utilizing programming languages such as Go and Python.Create and manage APIs using REST and gRPC protocols.Develop and uphold scalable and extensible data schemas with technologies like PostgreSQL and Clickhouse.Contribute to frontend interfaces using HTML, CSS, and JavaScript frameworks like React or Angular.Ensure security and adherence to industry best practices in all applications.Continuously enhance software development processes and methodologies.Qualifications:Bachelor's degree in Computer Science or a related field.Minimum of 4 years of relevant experience in software development.Strong understanding of algorithms, data structures, and object-oriented programming principles.Proficient in backend development with experience in languages such as Python and Go.Familiarity with database technologies, including PostgreSQL, Elastic, and Redis.Experience designing and implementing API platforms and integration systems.Knowledge of cloud technologies such as GCP, AWS, and Azure.