Machine Learning Engineer - Audio at Sandbar | New York City

About SandbarSandbar is an innovative interface company located in New York City, dedicated to empowering individuals in an agentic world, allowing them to think, act, and move freely. Our talented team has developed software, machine learning, and hardware products at renowned companies such as Meta, CTRL-labs, Google, Apple, Fitbit, Peloton, and Equinox.Our flagship product, Stream, is a cutting-edge human-agent interface—a private voice ring and conversational computer. Featured in prestigious publications like the WSJ, Bloomberg, and Wired, Stream is set to launch in Summer 2026.Join us in revolutionizing interfaces for self-augmentation.Job SummaryWe are in search of a passionate Machine Learning Engineer specialized in audio technology to contribute to the development of Stream, our innovative conversational computer. In this role, you will create a system that integrates voice recognition, memory capabilities, and agentic control. This position is ideal for someone who is deeply committed to real-world machine learning applications and enhancing human-in-the-loop interactions.

About SandbarLocated in the vibrant heart of New York City, Sandbar is a pioneering interface company dedicated to empowering individuals to navigate an agentic world with freedom and autonomy. Our innovative team has developed cutting-edge software, machine learning, and hardware products, collaborating with industry giants such as Meta, CTRL-labs, Google, Apple, Fitbit, Peloton, and Equinox.Our flagship product, Stream, is a groundbreaking human-agent interface—a discreet voice-activated ring and conversational computer. Featured in renowned publications like the WSJ, Bloomberg, and Wired, Stream is set to revolutionize personal augmentation and is slated to begin shipping in Summer '26.Join us in our mission to redefine self-augmentation through innovative interface design.About the RoleAs a Senior Firmware Engineer, you will play a crucial role in the design, development, testing, and implementation of firmware for embedded systems. This position demands a robust understanding of both hardware and software, enabling you to collaborate effectively with cross-functional teams to deliver exceptional products. Your involvement will span all phases of firmware development, from initial concept through to production.

About SandbarSandbar is an innovative technology firm based in New York City, dedicated to empowering individuals in an agentic world—enabling them to think, act, and move with freedom. Our talented team has developed cutting-edge software, machine learning, and hardware products in collaboration with industry giants like Meta, CTRL-labs, Google, Apple, Fitbit, Peloton, and Equinox.Our flagship product, Stream, represents a groundbreaking human-agent interface—a discreet voice ring and conversational computer. Stream has garnered attention in prestigious publications like the WSJ, Bloomberg, and Wired, and is set to launch in Summer '26.Join us in redefining the interface for self-augmentation.About the RoleWe are seeking an imaginative and driven creative leader to articulate the narrative of a revolutionary computing device—one that emphasizes self-extension, enhances human expression, and enriches real-world experiences. You will spearhead our content strategy, collaborating closely with our founders and Head of Marketing to produce compelling materials that resonate with our audience, effectively conveying the essence of Stream, our brand, and the vision we are striving towards.Ideal candidates will have experience in building audiences, possess a founder's mindset, and deliver results like a seasoned creator. This role is designed for someone eager to innovate and create original content without predefined guidelines.ResponsibilitiesLead the content creation and strategy across platforms such as Instagram, YouTube, X, among others.Develop short-form videos, static posts, and motion graphics—from concept to publication.Collaborate with external partners to produce engaging content.Capture and edit high-quality content using an iPhone-native aesthetic.Contribute to brand design efforts as needed, including emails and marketing collateral.QualificationsDemonstrable experience in audience building for a brand, personal project, or self-initiated venture.A strong portfolio or social media presence showcasing your taste and skills in video, static visuals, and motion content.Proficient in all aspects of content creation: shooting, editing, designing, and animating independently.Possess an entrepreneurial mindset—capable of identifying opportunities, making informed decisions, and acting swiftly.

About SandbarAt Sandbar, based in the vibrant New York City, we are pioneering the next generation of human-agent interfaces. Our mission is to empower individuals to think, act, and move freely in an increasingly agentic world. Our talented team has developed software, machine learning, and hardware products for industry leaders such as Meta, CTRL-labs, Google, Apple, Fitbit, Peloton, and Equinox.Our flagship product, Stream, is an innovative private voice ring and conversational computer that redefines how humans interact with technology. Stream has garnered attention from major publications like the Wall Street Journal, Bloomberg, and Wired, with shipping slated for Summer '26.We invite you to join our mission in creating a transformative interface for self-augmentation.Role OverviewWe are seeking a skilled software product engineer to contribute to the development of Stream, our groundbreaking conversational interface. Our goal is to make technology as effortless as thought—fast, intuitive, and universally accessible. This position is ideal for someone who thrives at the intersection of software engineering, interaction design, and consumer products.

About SandbarAt Sandbar, located in the vibrant heart of New York City, we are dedicated to enhancing human capability in an increasingly agentic world. Our innovative team has developed cutting-edge software, machine learning, and hardware products, collaborating with industry leaders including Meta, CTRL-labs, Google, Apple, Fitbit, Peloton, and Equinox.Our flagship product, Stream, represents the future of human-agent interaction—a sophisticated private voice ring and conversational computer that has garnered attention from WSJ, Bloomberg, and Wired, with shipping set to commence in Summer '26.We invite you to join us in pioneering a transformative interface for self-augmentation.Your RoleWe are on the lookout for a talented and experienced infrastructure engineer to play a critical role in the development of Stream. You will be instrumental in creating a highly scalable, real-time production service that incorporates multiple stages of machine learning and data processing. Collaboration with mobile and firmware engineers will be essential as you lay the groundwork for groundbreaking human-computer interactions.

The City of New York is hiring a Data Engineer to support essential data projects that inform city decisions and strengthen public services. This full-time role is based in New York City and centers on using data analytics to address challenges across city operations. Role overview As a Data Engineer, you will play a key part in initiatives that shape how the city uses information to make choices and deliver services. The work involves collaborating with a team focused on improving processes and outcomes for residents. What you will do Contribute to projects that gather, organize, and analyze data for city departments Help translate complex data into practical insights for decision-makers Work with colleagues to find solutions that enhance city operations and public services Location This position is based in New York City and requires full-time availability.

Join Tempo, a pioneering layer-1 blockchain designed specifically for stablecoins and real-world payments, leveraging the deep expertise of Stripe in global payments and Paradigm in crypto technology.Our innovative payment-first architecture offers a scalable, cost-effective, and reliable backbone to accommodate high-volume payment scenarios. We aim to facilitate seamless, economical, and scalable money transfers, prioritizing user simplicity for fintechs, traditional banks, merchants, platforms, and all others eager to modernize their payment solutions.We are collaborating with top-tier design partners across AI, e-commerce, and financial services, including Anthropic, Coupang, Deutsche Bank, DoorDash, Mercury, Nubank, OpenAI, Revolut, Shopify, Standard Chartered, Visa, and more.Our team is composed of crypto-enthusiasts dedicated to building the essential infrastructure for significant economic transactions on the blockchain. If you thrive in a fast-paced environment and are ready to take bold steps, we invite you to join us!About the RoleAs a Product Engineer, you will empower users to leverage the Tempo blockchain through the development of first-party applications like the Tempo Wallet and by facilitating integrations for customers to enhance their stablecoin transactions. You will engage closely with production-grade blockchain systems and transaction flows.This position is ideally suited for former founders or aspiring entrepreneurs. You will encounter a diverse array of critical payment and crypto challenges across startups, mid-market firms, and large enterprises, allowing you to oscillate between product development and deployment in customer environments, thereby gaining comprehensive insights into the entire product lifecycle, from integration to market strategy.Key ResponsibilitiesDesign and develop internal and first-party applications for both agents and users.Collaborate with startups and enterprise clients to integrate Tempo into their payment infrastructures.Acquire an in-depth understanding of the Tempo blockchain and its product suite.Quickly navigate through unfamiliar codebases and organizations to ensure timely product launches.Gather field insights to enhance the product, developer experience, and blockchain technology.

About Blee Blee is building AI-first software that replaces traditional workflows like spreadsheets and email. Our platform helps enterprise clients streamline compliance and improve transparency across their organizations. Thousands of users from major enterprises rely on Blee to meet their requirements quickly and thoroughly. The leadership team brings experience from Adobe, Chime, PayPal, AWS, Wachtell, Harvard Law, and Columbia Law. Blee’s platform tackles complex, end-to-end challenges for clients. The team values engineers who enjoy solving problems and are curious about the needs of users, many of whom are new to modern software tools. Offices are located in downtown San Francisco and soon in New York City, with most of the team based in these two cities. Role Overview: Product Engineer (New York City) Product Engineers at Blee deliver full-stack features that shape the experience for enterprise customers. This role involves building and launching product features based on real customer needs and the company roadmap. Work happens in a startup setting where priorities shift quickly and collaboration is key. What You Will Do Design, build, and release full-stack product features guided by roadmap priorities and customer input. Participate in sprint planning and code reviews to estimate, plan, and work closely with other engineers. Translate product specifications into technical designs in partnership with the Product Manager. Write and maintain automated tests (unit, integration, end-to-end) to reduce manual QA work. Respond to customer-specific requests, delivering tailored solutions when prioritized by the Product Manager. Help reduce technical debt by improving performance and developer experience. Document technical decisions, including architecture changes, API contracts, and design choices. What We Look For Engineers who care about the purpose behind each feature, not just the implementation. Collaborators who enjoy discussing ideas and driving improvements for users.

TLDR Become a part of Knoetic, a dynamic company that has secured over $50 million from esteemed venture capitalists such as Accel and Menlo, along with contributions from hundreds of angel investors, as we unveil a groundbreaking series of AI products.Join our newly-formed, high-energy AI product team. Rather than stepping into a well-established system, you will actively contribute to building it from the ground up within this select group of AI specialists.Take ownership of features from conception to delivery as an individual contributor, delivering at an impressive pace and influencing a product utilized by thousands of executives at companies including Box, Brex, Notion, OpenAI, and Figma.We seek an AI-native engineer with a customer-focused mindset. You should be among the top 10% of users of tools such as Cursor, Claude Code, and Codex, and be passionate about crafting exceptional experiences for our clientele. Knoetic AI + Our Chief People Officer Network Our goal is to create the "Second Brain" for Chief People Officers and their HR teams. We are supported by $50 million from Accel, EQT, Menlo, and many distinguished angel investors such as Adam Grant and Shreyas Doshi.We offer a unique blend of consumer and enterprise products that serve thousands of C-level executives from firms like Box, Figma, dbt labs, Lyft, Notion, and OpenAI.Learn more about our "right brain" (CPOHQ) and our "left brain" (AI & People Analytics) here. Overview We are searching for a Fullstack Product Engineer who is eager to:Take full responsibility for features, from gaining deep insights into customer challenges to launching the feature and promoting its use and adoption.Engage across the entire technology stack (including React, TypeScript, NestJS, PostgreSQL).Deliver quickly and with high quality; you believe that speed and quality can coexist, and that both can be improved simultaneously.Collaborate directly with customers: engage in calls, troubleshoot their challenges, and iterate based on authentic feedback.Design powerful solutions that resonate with our users.

About Sequence Sequence is building a new model for the American service economy by acquiring, improving, and managing businesses for the long term. The company focuses on using artificial intelligence to help these businesses make faster decisions, personalize services at scale, and deliver better results for their customers. Sequence believes that real change comes from deep involvement and ownership, not just consulting or selling software. Unlike traditional SaaS or consulting firms, Sequence integrates its technology and engineering teams directly with operating companies. As a permanent holding company, Sequence invests heavily in both the businesses it acquires and the people who run them. The team works side by side with management, aiming to transform operations from within as true partners. Sequence has raised $75 million in funding. The company’s seed round was led by Conviction and 8VC, and its Series A was led by Lux Capital with participation from Definition Capital and others. Role Overview: Product Engineer Location: New York City As a Product Engineer at Sequence, the work centers on two main goals. 1. Create Value Within Operating Companies Product Engineers translate complex human expertise into AI-powered processes. This includes deploying intelligent agents and building workflows with large language models (LLMs) to solve real operational problems. The solutions developed are put to use daily by teams across Sequence’s portfolio. 2. Build for Scalability Across the Platform Each transformation should also strengthen Sequence’s core AI platform. Many acquired businesses depend on manual, labor-intensive processes. By creating reusable systems that work across the portfolio, Product Engineers help make future transformations faster and more effective, moving service businesses toward a product-driven approach. As Sequence grows, engineers who excel will have opportunities to shape and lead entire business verticals, working closely with operators and investors to drive industry-wide change.

The City of New York seeks an Assistant Mechanical Engineer to join the Division of Property Management. This position plays a key part in maintaining and upgrading city building infrastructure. Role overview Work includes supporting the planning, design, and supervision of mechanical engineering projects. The focus is on improving systems and services across city properties. Key responsibilities Assist in developing plans and technical designs for mechanical systems in city buildings Support project oversight to ensure work meets standards and timelines Contribute to efforts that enhance building infrastructure and services Location This role is based in New York City.

About UsDorsia stands at the leading edge of hospitality technology, transforming access to the most sought-after restaurants, events, and experiences. By integrating innovative technology with the essence of luxury hospitality, we empower our members to secure hard-to-get reservations while offering operators unmatched control, visibility, and revenue enhancement.As a rapidly growing startup, supported by over $50 million from premier investors like Index Ventures and partnerships with industry leaders such as Major Food Group, Groot Hospitality, and Gracious Hospitality, we are expanding our presence and redefining the global hospitality sector. We are seeking exceptional talent to propel our next growth phase, and that’s where you come in.About the RoleWe are looking for a Product Engineer to join our dynamic and impactful team. As a versatile developer, you will engage across the entire stack—delivering essential product features, scaling systems, and enhancing user experiences. You will utilize state-of-the-art tools, including AI-driven development environments, cloud-native platforms, and rapid feedback loops to expedite delivery and elevate quality.What You’ll DoCreate Full Stack Features: Design, develop, and deploy production-level code across mobile (React Native), backend (PHP/TypeScript), and infrastructure.Leverage AI for Development Speed: Employ cutting-edge generative AI tools to prototype, debug, and automate efficiently.Contribute to Various Areas: Approach UI refinement, system performance, backend logic, and operational tools with equal passion.Collaborate Across Teams: Engage directly with design, product, and operations to establish requirements and deliver user-oriented enhancements.Ensure Quality & Maintainability: Write clean, testable code and help implement practices that maintain a healthy codebase as we scale.

The City of New York is seeking a dedicated Surveyor to join our dynamic team. As a Surveyor, you will play a crucial role in land surveying, ensuring accuracy and compliance with city regulations. This position offers a unique opportunity to contribute to various city projects, enhancing the infrastructure and development of New York City.

Join the dynamic team at the City of New York as a Scheduler, where you will play a vital role in organizing schedules and ensuring the efficient operation of city services. As a key player, you will collaborate with various departments to coordinate appointments, manage resources, and facilitate communication across teams.Your organizational skills will be paramount in maintaining streamlined operations, and your attention to detail will help to ensure that all scheduling needs are met effectively.

Join Our Innovative TeamAt Vellum, we are redefining the way teams across various sectors like Sales, Ops, Marketing, and Finance operate. In a world where technology has empowered engineers with tools such as Cursor, Devin, and Claude, we believe it's time for everyone to benefit from these advancements. Our platform allows users to articulate goals in simple language and swiftly generate dependable agents, making work more efficient and less tedious.Our Core ValuesAs a high-performance team in a competitive landscape, we seek exceptional builders who resonate with our values:Innovate for the FutureWe are committed to pioneering AI tools and living at the forefront of technology.We leverage AI tools extensively in our daily operations.We anticipate customer needs and build solutions proactively.We strategically prioritize speed while ensuring sustainability in our products.Communicate with IntegrityTrust is paramount in our environment.We maintain open and honest communication.Feedback is welcomed and appreciated.We honor our commitments and communicate proactively if changes arise.Aiming for SuccessWith $25M in funding from leading investors, we are poised to make a significant impact in our market.We thrive on winning and are dedicated to swift execution.Excellence in execution is our standard.We are committed to maximizing output while safeguarding against burnout.Your ProfileExperience in an early-stage startup environment.Proficient in Typescript, React, and Python.Possess a strong product mindset and a passion for building user-centric solutions.

About MetaformsAt Metaforms, we are revolutionizing the realm of market research.Our cutting-edge AI platform enables top-tier research agencies to accelerate their operations up to 10 times while preserving exceptional quality. With AI Agents enhancing survey programming, data processing, and project management, we empower clients such as Dynata, Savanta, and Borderless Access to complete more projects with reduced effort. Over 1,000 surveys processed each month Partnering with Fortune 500 companies Rapid month-over-month growth Supported by $9 million in Series A funding for aggressive scaling The RoleWe are seeking a Senior Product Engineer based in NYC to take ownership of product surfaces from concept to delivery — thoroughly understanding user challenges and launching impactful features.This is not a role where you simply execute tasks from a product manager. You will engage directly with customers, develop strong perspectives on product direction, and implement solutions yourself. You will work at the convergence of product development and engineering, leveraging user insights, product acumen, and high-quality coding to achieve results.If you desire substantial ownership, direct customer interaction, and the chance to shape an AI-driven product from its inception, this position is tailored for you. ResponsibilitiesManage product areas comprehensively: identify issues, design solutions, code, deploy, and assess impact.Engage regularly with clients (agencies, survey programmers, research operations teams) to gain a deep understanding of their workflows and challenges.Make informed product choices — determining what to build, what to prioritize, and what to discontinue — driven by user feedback and business implications.Develop and deploy across the entire technology stack (frontend, backend, AI systems).Contribute to product strategy alongside company founders, integrating direct customer feedback into roadmap planning.Iterate rapidly: launch, analyze usage data and feedback, and refine continuously.‍ Desired QualificationsEssential Skills3 to 7 years of software engineering experience with robust full-stack capabilities (React, TypeScript, Python, AWS).Proven product intuition — you've shaped what is built, not just how it’s constructed.Ability to navigate ambiguity — converting vague challenges into clear, actionable solutions.Strong collaborative skills and a proactive attitude.

About Sequence Holdings Sequence Holdings is building a new model for the American service economy by acquiring, transforming, and operating innovative companies. With $75 million raised (seed led by Conviction and 8VC, Series A led by Lux Capital), the company is positioned for significant growth. Sequence takes a hands-on approach: rather than acting as a vendor or consultant, the team invests deeply in each business, integrating technology and engineering talent to drive lasting operational change. Role Overview: Product Engineer The Product Engineer role centers on two main areas: Value Creation: Work within Sequence’s operating companies to transform human-driven processes into AI-powered systems. Deploy agents and build LLM-based workflows that solve real operational problems. The focus is on solutions that are actively used by business operators, not just prototypes. Scaling Transformation: Each transformation should strengthen Sequence’s core AI platform. By developing reusable systems, help shift acquired businesses from manual to product-driven operations and accelerate future transformations across the portfolio. As Sequence grows, top engineers will have the chance to define and lead entire verticals, working closely with both operators and investors to shape how whole industries run on the Sequence platform. Location This position is based in New York City.

Join the vibrant legal team at the City of New York as a Paralegal. In this crucial role, you will support attorneys in various legal matters, conduct research, and prepare documents to ensure the smooth functioning of legal processes.

The RoleCandid Health is on the lookout for a seasoned Engineering Manager to lead our Product Engineering team in strategizing, executing, and delivering our innovative platform to healthcare providers who depend on it for essential financial and operational workflows. Your team will play a pivotal role in constructing and upholding crucial elements of a sophisticated and dynamic architecture that meets industry-leading standards for quality, durability, and performance. In this capacity, you will collaborate within a highly cross-functional team, guiding and mentoring skilled engineers and tech leads, nurturing their professional development, and ensuring their impactful contributions. Close collaboration with company leadership, sales, and product groups will be vital as you assist in shaping and implementing our long-term product vision.What You’ll DoAct as an outcome steward: With extensive ownership of priorities for both our teams and customers, you will significantly influence the balance of competing demands and manage trade-offs effectively.Lead implementation: Guide your team in fulfilling the technical vision by scoping projects and reviewing plans. Your familiarity with our codebase will enable you to champion best practices for design, delivery, and interdepartmental collaboration.Manage technical teams: Oversee one or more motivated, successful teams, experimenting with and instituting systems that drive your teams' success. Collaborate with product, leadership, and fellow engineers to develop Candid’s flagship products, steering the direction for technical leads and individual contributors.Mentor and develop talent: Investing in Candid's future entails fostering the growth of our team members. You will help define pathways for your team's growth through both formal performance management and organic opportunities.Define product technical strategy: Collaborate with company and product leadership to understand and contribute to essential product and company strategies. You will be entrusted to architect the systems, processes, and frameworks necessary to meet our short-term and long-term objectives.

What is Kalshi?Kalshi is pioneering a new financial frontier through prediction markets, empowering individuals to trade on future outcomes and transforming questions into financial assets. After years of advocacy, we successfully legalized prediction markets in the U.S., establishing ourselves as the fastest-growing financial marketplace in the nation, featuring thousands of markets across diverse sectors such as politics, economics, finance, technology, AI, and culture.We envision prediction markets becoming the largest financial marketplace globally, enabling everyone to turn insights into actionable financial positions.Our Vision: Build the largest financial market on Earth.Our Mission: Foster truth in the world through the power of markets.At Kalshi, we embrace a culture of excellence, hiring talented individuals who work diligently and enjoy the journey. We seek ambitious professionals to join our dynamic team in developing the next generation of financial markets.Role OverviewAs a Software Engineer, Product at Kalshi, you will be instrumental in creating user-facing systems and internal tools that facilitate customer interactions with our markets. Collaborating closely with product, design, and operations teams, you will simplify complex market mechanics into seamless, reliable experiences for traders, market makers, and partners. In our rapidly expanding environment, you will deliver end-to-end features that significantly influence customer adoption, liquidity, and the advancement of Kalshi’s offerings. Your role will evolve alongside the company as you contribute to shaping both the product and its engineering culture.Your ResponsibilitiesDesign and develop high-performance backend services and APIs that support the rapid testing of new trading features as our user base expands.Architect and maintain systems that power personalization engines, recommendation algorithms, and other data-driven features aimed at enhancing trader engagement and retention.Collaborate with product managers and frontend engineers to drive initiatives that enhance or broaden Kalshi’s platform.