Senior Machine Learning Engineer at PhysicsX | New York

Join Virtu’s Research Technology team as an accomplished Machine Learning Engineer. You'll be part of a dynamic group of specialists focused on creating the robust infrastructure that fuels our quantitative researchers. This is a rare chance to engage at the crossroads of machine learning and systematic trading, developing tools that directly influence the efficiency and speed of our research capabilities. In this pivotal role, you will spearhead the development of our machine learning research platform. Your responsibilities will include managing data and computational resources, tracking experiments, and empowering researchers to transition from concept to result with maximum efficiency. Collaborating closely with quantitative analysts and engineers, you will significantly impact the implementation of machine learning practices as we enhance our operational capabilities. Our tech stack primarily includes Python, C++, and Java, complemented by various open-source tools and proprietary technologies.

Join Virtu Financial, a leading quantitative trading firm, where innovation meets impact in the financial markets. As a Machine Learning Researcher, you will engage in groundbreaking research opportunities within a dynamic and agile organization. This role presents a unique blend of intellectual challenge and immediate business influence, as you navigate complex problems that lack straightforward solutions.Your responsibilities will encompass our entire modeling ecosystem, from feature engineering and deep learning architecture to training dynamics and execution strategies. Your pioneering contributions will shape our market operations globally, making a real difference in a fast-evolving industry that thrives on creative problem-solving and first-principles thinking.We seek individuals with a strong sense of curiosity, a robust technical skill set, and a collaborative spirit, regardless of their industry background.

Virtu Financial, Inc. is a premier financial institution that utilizes state-of-the-art technology to provide liquidity across global markets and deliver innovative and transparent trading solutions to our clients. As a distinguished market maker, Virtu enhances market efficiency by offering substantial liquidity in over 19,000 securities across 235 venues in 36 countries worldwide.Our core services, including market making, client execution, and proprietary trading venues, provide a competitive edge, allowing us to develop and implement cutting-edge tools that enhance operational efficiency and performance throughout the organization.THE ROLEAs a Quantitative Strategist at Virtu, you will collaborate within interdisciplinary teams comprising traders, quantitative analysts, and experienced software engineers. Our environment is collegial and supportive, fostering interactions across various teams globally.Utilize your keen observational skills and advanced statistical techniques to design and refine predictive models.Conduct research to devise and implement innovative trading strategies.Evaluate existing strategies for potential enhancements.Develop comprehensive risk models and frameworks to effectively manage portfolio risks.Create tools that automate research workflows and enhance the visualization of complex datasets.THE CANDIDATEA PhD in a quantitative discipline such as Science, Mathematics, Engineering, or other STEM fields.No prior experience in Quantitative Finance or specific asset class knowledge is necessary.A strong academic background with diverse, challenging coursework and a solid GPA.Outstanding quantitative, mathematical, and analytical problem-solving abilities.Excellent communication skills with the capability to collaborate effectively with colleagues.Ability to tackle technical and quantitative challenges under pressure.Proficiency in expressing concepts mathematically and algorithmically.Programming expertise, particularly in Python and C/C++.A strong sense of intellectual curiosity and self-motivation, with the capability to learn from peers and seek guidance.Exceptional adaptability and a high tolerance for ambiguity.A strong desire for success within a collaborative environment.

ABOUT US At Virtu Financial, we stand at the forefront of the financial industry, harnessing advanced technology to provide liquidity to global markets and deliver innovative, transparent trading solutions to our esteemed clients. As a distinguished market maker, we facilitate deep liquidity, fostering more efficient markets worldwide. Our expertise in market structure, extensive diversification, and cutting-edge execution technology empowers us to offer competitive bids and offers across over 19,000 securities at more than 235 venues in 36 countries globally. JOIN OUR TEAM We are seeking a skilled and experienced engineer to develop and maintain the critical reference data systems that support a variety of platforms within Virtu, including trading systems, quantitative research systems, and back-office operations. Our company thrives in a dynamic, fast-paced environment characterized by a meritocratic culture and a flat organizational structure. We are committed to continuous improvement, making learning and knowledge-sharing integral to our values. YOUR ROLE Aggregate, validate, enhance, and distribute extensive datasets from major data vendors such as Bloomberg and LSEG. Design, test, implement, and maintain various databases and APIs. Architect tailored software solutions for business stakeholders to optimize daily data management and evaluation across the organization. Facilitate large-scale migrations for global, multi-asset data. Oversee the daily operation of our production systems. Conduct both proactive and reactive system maintenance as needed. QUALIFICATIONS Bachelor's degree in Computer Science or a related field. A minimum of 5 years of experience with enterprise-level distributed systems, particularly in Java. Solid understanding of relational databases (SQL, Oracle RDBMS). A keen interest in trading and financial markets. PREFERRED BUT NOT REQUIRED: Prior experience in the financial services sector, particularly with trading systems. Proficiency in managing large datasets using Python. Familiarity with HBase, Hadoop, or equivalent cloud storage solutions. Understanding of the Linux environment. Experience using version control systems such as SVN or Git. Salary Range: $175,000 - $200,000 (excludes bonuses, benefits, etc.)

Join Tagup, a pioneering defense technology company established at MIT, as we revolutionize logistics superiority through advanced AI solutions. Our mission is to deliver innovative technologies that tackle the most pressing challenges in high-stakes environments. This is your chance to contribute to critical national security efforts and support U.S. and allied forces in meaningful ways. Help us shape the future of defense logistics for a safer world.We are on the lookout for a skilled Machine Learning Engineer to bolster our Salt Lake City team, focusing on the development of next-generation AI-driven defense and aviation systems. In this role, you will transcend traditional model building by designing, deploying, and scaling AI solutions that are essential for mission-critical operations.This position offers a unique opportunity to work at the intersection of groundbreaking research and practical application, creating models and infrastructure that enhance reliability, efficiency, and performance.If you are passionate about overcoming complex technical challenges and wish to make a tangible impact on national security and aviation safety, we invite you to apply.

Join Virtu Financial Virtu Financial is a pioneering financial services firm, utilizing state-of-the-art technology to enhance market liquidity and offer innovative, transparent trading solutions globally. As a prominent market maker, we facilitate efficient trading in over 19,000 securities across 235 venues in 36 countries. Position Overview We are seeking a talented UI Developer to become part of our dynamic UI development team. This diverse group of skilled software engineers collaborates across the Virtu organization to create the next generation of scalable web-based user interfaces and trading tools. While the primary focus will be on frontend development, there may be opportunities to engage in backend projects as well. Team members work closely with traders and fellow developers to identify needs and implement real-time trading, visualization, analysis, and reporting tools. Ideal candidates will possess a strong passion for crafting intuitive user interfaces, alongside extensive experience with web technologies and JavaScript frameworks.

Location: New York, NYStart date: ASAPLanguages: English (required)About the RoleJoin Pragmatike as we partner with a dynamic AI cybersecurity firm, recognized by top-tier investors and visionary AI leaders. This innovative company is dedicated to establishing robust security measures for the AI era, safeguarding enterprises from advanced threats, including deepfakes, smishing, and synthetic voice attacks.Following a successful Series B funding round with industry-leading AI and venture partners, the organization is poised for substantial growth. Trusted by major financial institutions, technology giants, and healthcare providers, they are rapidly scaling to meet the demands of a $200 billion market opportunity.We are seeking a Staff Machine Learning Engineer to architect and enhance the company’s machine learning capabilities from the ground up. This role is pivotal to our product vision and focuses on strategic ownership, infrastructure development, and comprehensive execution of machine learning across the organization.Currently, there is no dedicated machine learning infrastructure or team. You will lay the groundwork: identifying where machine learning can add product value, designing end-to-end production systems, and setting the technical roadmap for the evolution of machine learning within the company.This position is highly impactful and offers significant autonomy, ideal for candidates experienced in building production ML systems and ready to develop a robust ML function from inception to full-scale operation.What You'll DoDefine the company's machine learning strategy: identifying application areas across products, determining necessary infrastructure, and making informed build vs. buy decisions.Design and construct production ML systems from scratch, including data pipelines, model training workflows, evaluation frameworks, and inference serving.Establish a rigorous evaluation methodology to assess model quality, identify regressions, and support iterative improvements based on data.Oversee data strategy: define necessary data, structure labeling, establish feedback loops, and ensure models evolve continuously.Collaborate closely with product and backend engineers to integrate machine learning into customer-facing systems.Contribute production-quality code to the existing codebase and participate in architectural decision-making.In time, assist in recruiting, mentoring, and leading the ML team as the function grows.

Role overview physicsx is seeking a Machine Learning Engineer to join the team in New York. The position centers on designing machine learning models and working with large, complex data. These efforts help drive technology projects and process improvements throughout the company. What you will do Build and refine machine learning models for practical use cases Examine and interpret challenging datasets to extract insights Collaborate with colleagues from a range of disciplines to identify opportunities for machine learning solutions Contribute to technology initiatives and process optimization projects across the organization Location This role is based in New York, United States.

About Treeswift:Facing challenges from severe storms, wildfires, and the demand for affordable energy solutions, Treeswift is dedicated to helping energy companies transform their field operations to tackle unprecedented growth and challenges. Our innovative sensors are deployed in the field, collecting extensive LiDAR and imagery data, which is then analyzed by our advanced AI models to provide actionable insights through our web platform. To date, our technology has empowered utilities to mitigate wildfire risks, streamline regulatory compliance, and accelerate recovery from severe weather events.Since launching our services to utilities in June 2024, we have partnered with three of the five largest utilities in the United States and are rapidly expanding our customer base. We are building a team of passionate experts with extensive backgrounds in robotics from prestigious institutions like Penn, Caltech, and CMU, along with experience in enterprise software development from companies such as Palantir, Stripe, and Oracle. Our mission is supported by leading investors, including Penny Pritzker’s Inspired Capital.Headquartered in lower Manhattan, Treeswift also maintains an office in Philadelphia, with team members located closer to customer sites in the Bay Area.About the Role:We are seeking a talented and driven Machine Learning Engineer to join our dynamic team. In this pivotal role, you will develop and implement cutting-edge machine learning solutions to advance our mission. The ideal candidate will have a strong background in training and deploying models within commercial environments. If you are an enthusiastic engineer with a desire to shape the future of distributed infrastructure management, we encourage you to apply.This position is full-time and offers a hybrid work arrangement, requiring in-person attendance two days a week at our NYC office.Key Responsibilities:Drive the development of innovative machine learning models. Your work will focus on enhancing the efficiency and accuracy of energy infrastructure fieldwork, specifically through the development of LiDAR point cloud models for landscape and infrastructure classification, as well as image models for assessing vegetation attributes such as species and health.

About FinchAt Finch, we envision a world where every American household has access to legal counsel during significant life events. We are transforming the legal landscape by creating innovative infrastructure that enhances justice accessibility. Our modern consumer law framework automates administrative tasks, prioritizing client needs, starting with personal injury cases.Since our launch in April, we have experienced exponential growth, expanding our reach tenfold and supporting pre-litigation processes for leading law firms nationwide. We seamlessly blend expert operations with cutting-edge AI technology to manage intake, claim initiation, medical records, police reports, lien management, demands, and every detail in between.Backed by distinguished investors including Sequoia and Redpoint, along with founders and CEOs of transformative companies like DoorDash, Ironclad, and Digits, we are fundamentally reshaping how legal services are delivered to everyday Americans. We are in search of exceptional talent to help us scale this mission across the country.This RoleLegal processes often involve navigating unstructured documents, repetitive tasks, and data that current systems struggle to manage. As a Machine Learning Engineer at Finch, you will take ownership of the entire AI system lifecycle—from prototyping to deployment—addressing challenges where a single innovation can significantly enhance law firm operations.What You'll DoIn this hands-on applied AI position, you will develop and deploy production-ready systems rather than just conducting experiments. Your responsibilities will evolve alongside our product and team.Create voice agents, browser agents, OCR pipelines, and LLM-driven workflows that consistently perform well in production.Establish robust evaluation frameworks and feedback mechanisms to enhance model accuracy and dependability.Manage the complete ML lifecycle, including model selection, fine-tuning, prompt engineering, deployment, and monitoring.Collaborate closely with product teams, operations, and legal experts to ensure the AI solutions address the right challenges.Monitor emerging research and tools, making informed decisions on their integration into our technology stack.Who We Have in MindWe seek engineers who prioritize results over algorithms and are equally proficient in production environments and analytical settings. Below are the key qualifications we are looking for.Must-HavesOver 3 years of experience in building and deploying production ML systems.Proficient in Python, with experience across the full ML stack.

At PermitFlow, we are transforming the future of construction across America. As a pioneering applied AI firm, we address one of the most significant information challenges in the construction industry: comprehending what can be built, where, and how. Our innovative AI-driven agents empower the nation’s most rapidly growing construction companies to navigate the complexities of permitting, licensing, inspections, and project closeouts—thereby expediting housing, clean-energy, and infrastructure development nationwide.The construction sector, valued at $1.6 trillion, faces substantial delays, resource wastage, and unrealized opportunities. PermitFlow has successfully provided enhanced speed, accuracy, and visibility to over $20 billion in development projects, aiding contractors in minimizing compliance time, mitigating project risks, and scaling operations with assurance.As the U.S. enters a new capital expenditure supercycle encompassing data centers, factories, housing, and renewable energy, becoming a part of PermitFlow means constructing the AI infrastructure that underpins every construction project and propels the upcoming wave of reindustrialization.We have raised over $90 million, recently completing our Series B funding round, backed by prestigious investors such as Accel, Kleiner Perkins, Initialized, Y Combinator, Felicis, and Altos Ventures, with support from industry leaders at OpenAI, Google, Procore, ServiceTitan, Zillow, PlanGrid, and Uber.Our headquarters are located in New York City, offering a hybrid work schedule (3 days in the office per week). Preference will be given to candidates based in NYC or those willing to relocate.

Why Join DoppelAt Doppel, we are determined to combat one of the most significant challenges posed by AI: mass-manufactured social engineering. With the rise of scams, deepfakes, and various social engineering attacks infiltrating every digital channel—from websites and social media to ads and encrypted messaging apps—our mission is both simple and audacious: to create a safer internet by outsmarting the fastest-evolving digital threats.Supported by renowned investors such as a16z and Bessemer, and trusted by leading brands including OpenAI, United Airlines, and Coinbase, Doppel is experiencing rapid growth. If you are passionate about tackling real-world problems with innovative technology, we would love to connect with you.What We Are BuildingWe are developing an AI-native social engineering defense platform. This entails creating scalable systems that monitor billions of domains, social media accounts, applications, dark web forums, and more, utilizing AI agents to identify and neutralize digital threats.Your RoleWe are seeking a talented Machine Learning Engineer to contribute to the development and scaling of the models and systems that drive Doppel’s detection capabilities. In this position, you will:Design, train, and deploy models for both batch and real-time inference to identify malicious or infringing content across a variety of data sources.Collaborate closely with the Detection and Infrastructure teams to ensure our ML systems can scale with the increasing volume of web data we process.Tackle challenges that span from Natural Language Processing (NLP) and embeddings to similarity search, classification, and anomaly detection.Engage directly with customers and internal stakeholders to translate real-world threats into practical ML solutions.

Join SeatGeek: Where Live Events Come to Life!At SeatGeek, we believe that live events are transformative experiences that bring people together. Our innovative technology and fan-centric approach are revolutionizing the ticketing industry.As a pioneering technology company, SeatGeek is on a mission to disrupt the $300 billion ticketing landscape. We have the vision, products, and team to enhance the experience for performers, venues, and fans while establishing a lasting consumer brand. Now, we’re looking for passionate individuals like you to join our journey.We’re seeking a Senior Machine Learning Engineer to join our R&D team, bringing your expertise to our dynamic projects.

Role overview Peloton Interactive, Inc. seeks a Senior Machine Learning Engineer based in New York. This position centers on building and improving machine learning algorithms that drive the evolution of Peloton’s fitness technology. The team’s efforts support new AI-powered features and enhance the way users engage with Peloton’s products. What you will do Design, develop, and deploy machine learning models for Peloton’s platform Optimize algorithms to improve user experience and increase engagement Work closely with engineers and product teams to deliver AI-driven features Impact This role plays a part in making fitness more accessible and enjoyable for Peloton’s community. The work directly influences how members experience workouts and interact with content on the platform.

Join our dynamic Machine Learning team at Jane Street, where we're seeking an innovative engineer with extensive experience in machine learning and a solid mathematical background. Your role will be pivotal in shaping the trajectory of our ML platform. Machine learning is integral to Jane Street's global operations. Our fast-paced trading environment offers a unique platform for rapid experimentation in ML, enabling us to seamlessly integrate new concepts. Our team comprises passionate individuals who value exceptional software engineering and the design of user-friendly APIs and systems. Your deep understanding of the ML ecosystem and various methodologies—be it neural networks, random forests, gradient-boosted trees, or advanced ensemble techniques—will be crucial for informed decision-making, ensuring we utilize the optimal tools for each challenge. You will also focus on refining research workflows to enhance our feedback loops. Successful ML engineers can grasp the mechanics of diverse modeling techniques and communicate the underlying mathematics effectively. If you haven't considered a career in finance before, rest assured, you're not alone; many of our team members started in similar positions. While we don't have a rigid set of qualifications, your curiosity and passion for solving complex problems will greatly contribute to our team culture.

Join our dynamic Machine Learning team at Jane Street, where we are seeking a talented Machine Learning Engineer with extensive experience in the field and a solid mathematical background. You will play a crucial role in shaping the direction of our cutting-edge ML platform. Machine learning is a vital component of Jane Street's global operations. Our rapidly evolving trading environment provides a unique platform for ML experimentation, enabling us to seamlessly integrate innovative ideas. Our team is composed of passionate individuals dedicated to the art of software engineering and the creation of user-friendly APIs and systems. We depend on your deep understanding of the ML landscape and various methodologies—be it neural networks, random forests, gradient-boosted trees, or advanced ensemble methods—to facilitate informed decision-making and ensure we employ the most effective tools for each challenge. Your contributions will also focus on refining research workflows to enhance feedback loops. Successful candidates will grasp the underlying mechanics of different modeling techniques and possess the ability to articulate the mathematical principles that govern them. If finance is a new frontier for you, you're not alone—many of us were once in your shoes. While we don't have a strict checklist of qualifications, if you possess a curious mind and a drive to tackle intriguing challenges, we believe you’ll thrive in our environment.

About UsAt Percepta, we are dedicated to revolutionizing essential sectors through applied AI. Our vision is to empower industries that drive the global economy, such as healthcare, manufacturing, and energy, leveraging cutting-edge technology.To achieve this, we partner with leading organizations to facilitate AI transformation. Our strengths lie in:Expertise in engineering, product innovation, and research.Our proprietary toolset, Mosaic, for swiftly implementing intelligent workflows.Strategic alliances with industry giants like Anthropic, McKinsey, AWS, and others within the General Catalyst portfolio.Our rapidly expanding team consists of Applied AI Engineers, Product Managers, and Researchers, all driven by a shared goal of integrating AI advances into practical enhancements in everyday life.Percepta is a proud partner of General Catalyst, a global leader in transformation and investment.Role OverviewWe are seeking talented Machine Learning Engineers to collaborate directly with client teams, defining and delivering impactful AI systems. This is not about prototypes; you will design, build, and deploy production-grade AI agents and workflows that significantly enhance business outcomes for our clients.As a Machine Learning Engineer, you will:Design and optimize AI/ML systems: Create comprehensive ML pipelines for data ingestion, training, evaluation, and deployment. Enhance and adapt LLM models using techniques like fine-tuning, distillation, and retrieval systems to address specific industry challenges.Conduct thorough evaluations of AI systems: Implement custom assessments to validate model performance in real-world applications.Apply advanced methodologies: Stay abreast of the latest innovations in areas such as RAG, tool integration, multi-step agent orchestration, and evaluation frameworks, applying these to meet unique customer needs.Collaborate across teams: Work alongside research and product teams to transform cutting-edge techniques into scalable features and workflows.Enhance our core product: Integrate insights from customer interactions back into our Mosaic product, consistently delivering reusable ML components and infrastructure enhancements.

Join the Nexxen Team!At Nexxen, we are redefining the landscape of advertising through innovative, data-driven solutions. We empower advertisers, agencies, and publishers globally to leverage our cutting-edge technology, which includes a unified demand-side platform (DSP) and supply-side platform (SSP), all anchored by the Nexxen Data Platform.Why Choose Nexxen?As a member of our global team, you will play a pivotal role in transforming the advertising industry. Our culture is built on the 3Cs: Customer Centric, Curious Mindset, and Collaboration without Ego. We pride ourselves on fostering an environment where creativity and teamwork thrive.Your Safety is Our PriorityAt Nexxen, your well-being is paramount. We take the threat of online scams seriously and would never ask for payment or promote dubious job opportunities. Always verify the authenticity of any job posting or communication claiming to be from Nexxen by contacting us at infosec@nexxen.com.Your RoleAs a Senior Machine Learning Engineer on our Applied Data Science team, you will collaborate closely with data scientists to develop state-of-the-art infrastructure for real-time performance optimization and machine learning solutions. This is a hands-on position ideal for someone with a proactive and innovative approach to machine learning and data-driven algorithm development.Work EnvironmentOur team operates on a hybrid schedule, with three days in the office and the flexibility to work remotely for the remainder. We also welcome applicants with senior-level adtech vendor experience for fully remote opportunities.

About Judi HealthJudi Health is a pioneering enterprise in health technology, offering a robust suite of solutions for employers and health plans. Our offerings include:Capital Rx, a public benefit corporation committed to delivering full-service pharmacy benefit management (PBM) solutions for self-insured employers,Judi Health™, which provides comprehensive health benefit management solutions tailored for employers, TPAs, and health plans, andJudi®, recognized as the industry's leading proprietary Enterprise Health Platform (EHP), which streamlines all claim administration workflows into a single scalable and secure platform.We are dedicated to rebuilding trust in the U.S. healthcare system alongside our clients, ensuring the infrastructure needed for quality care. To discover more, visit www.judi.health.Position Summary:Join us as a Machine Learning Engineer and be part of our mission to integrate advanced AI, ML, and GenAI into pharmacy benefits. We are seeking a skilled software engineer with expertise in machine learning to enhance our AI capabilities, driving productivity and creating exceptional experiences in our products and services.Your responsibilities will include designing and implementing sophisticated AI systems that utilize ML models for NLP, NLG, multimodal data analysis, chatbots, and RAG-based QnA. The ideal candidate will be passionate about applying AI/ML concepts to challenging problems and developing scalable solutions. We value collaboration and are looking for individuals who thrive in a team environment and enjoy crafting efficient, high-performance software leveraging Large Language Models (LLM), Multimodal Language Models (MLM), and other ML techniques to provide remarkable capabilities for our customers and partners.