Principal Responsibilities:

• Senior engineering role with a focus on low latency network technologies. You will have a balanced mix of project and operations across the low latency trading environment with Market Data, Trading and co-lo design.
• You will serve as the innovation lead to research and bring new network technologies into the firm including RF technologies, low latency transport, routing/switching and compute technologies.
• You will own and project manage global network projects from start to finish including requirement gathering, design, cost, implementation and deployment.
• You will coordinate installation, tests and troubleshoot our low latency data network platforms and transmission facilities (dark and lit fiber services, Gigabit Ethernet Services, etc).
• You will configure, install, maintain, and provide support for critical software and hardware of the network components. You will research, price out, and implement data circuits. You will design and implement high availability, low latency Market Data network.
• Responsibilities include but are not limited to deploying, supporting and troubleshooting the network Infrastructure: documenting the IT Infrastructure, policies, and procedures and performing general user support. You are expected to participate in after-hours work and an on-call rotation.
• You will assist with maintaining system applications using traffic and capacity monitoring tools to track errors and keep network performing optimally.

Qualifications/Skills Required:

• Expert in low latency network technologies – Multicast (IGMP, PIM), L2/L3, WAN design, expert in routing (BGP, OSPF).
• Strong experience with PCAP capture and high-accuracy timestamping of capture packets with PTP/PPS.
• Experience working with both lit and dark fiber, and muxing.
• 5+ years of experience in a network engineering, operations, and support function.
• Experience with Arista, Cisco and L1 switches. Knowledge of FPGA and high-performance computer technology is a plus.
• Proven ability to work hands on and take on a strong technical ownership capability in a global organization.
• Expert knowledge and troubleshooting of IP networking, TCP/IP.
• Experience with Python and bash. Knowledge of scripting to automate tasks.
• Strong Linux shell experience.
• Strong interpersonal and written communication skills.
• Proven ability operating in a fast-paced environment.
• Passion for providing a high level of service and support to internal customers.

The estimated base salary range for this position is $175,000 to $250,000, which is specific to New York and may change in the future. Millennium pays a total compensation package which includes a base salary, discretionary performance bonus, and a comprehensive benefits package. When finalizing an offer, we take into consideration an individual's experience level and the qualifications they bring to the role to formulate a competitive total compensation package.

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Projects will have a substantial impact on trading and analytics tooling with the expectation to expand ambition and scope over time. The successful candidate will combine strong technical skills, a passion for creative problem solving, and an intense curiosity.

The group is looking for a versatile strong Python coder whose main responsibility will be to develop the platform for the portfolio management team within the firm.

This is an ideal opportunity for a strong engineer that is looking to work within a trading team.

Principal Responsibilities

• Rapid development and release of applications: process automation, intelligent alerts, interactive visualizations, and portfolio analysis tooling
• Develop and enhance the existing platform for quantitative and portfolio manager team members
• Work on building out the Python codebase using the FastAPI, Flask, or other web frameworks
• Oversee the entire full stack development of the platform
• Integrate market data APIs from vendors and Millennium’s own database and transform the data for the team’s non-relational database
• Collaborate with team on best practices and overall business strategy

Qualifications/Skills Required

• Bachelor’s degree in Computer Science, Engineering, Mathematics, Physics, or a related quantitative discipline
• 4+ years of professional software or quant engineering experience
• Strong applied knowledge of web base application development using React and/or Angular
• Strong programming skills in Python both in web application development and data engineering/science tooling such as Numpy, Pandas, and/or PyTorch
• Experience AI forward deployments agent orchestration frameworks & MCP
• Strong SQL experience preferred for the pricing model's performance
• Experience using agentic coding workflows using Cursor, Claude code, etc.
• Experience with developing dashboards and other data visualization applications with Plotly, Matplotlib, Bokeh, Dash, etc.
• Experience using AWS technologies such as S3, Athena, SQS, Batch, Lambda
• Experience with Linux is a plus
• Extremely organized and a self-starter with effective multitasking and prioritization skills
• Highly motivated, willing to take ownership of work, drive to solve problems and work effective under pressure
• Excellent written and verbal communication skills, willing to proactively engage other team members in fostering a strong collaborative team-oriented environment
• Good team player with a strong willingness to participate and help others.
• Able to prioritize in a fast moving, high pressure, constantly changing environment; High sense of urgency

Millennium offers a total compensation package which includes a base salary, discretionary performance bonus, and comprehensive benefits. The estimated base salary range for this position is $150,000 to $200,000, which is specific to New York and may change in the future. When finalizing an offer, we take into consideration an individual’s experience level and the qualifications they bring to the role to formulate a competitive total compensation package.

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We believe in fairness, transparency, and respect for every candidate. Whether you're applying for your first role or your next big opportunity, your rights matter,and we’re committed to protecting them.

As a Data Protection Officer, you will play a critical role in ensuring the company's compliance with data protection regulations and best practices. You will be responsible for developing and implementing policies and procedures to protect personal information, responding to data breaches, and providing guidance to employees on data protection matters.

Responsibilities:

• Develop and implement data protection policies and procedures
• Respond to data breaches and incidents
• Provide guidance to employees on data protection matters
• Conduct regular audits and risk assessments
• Collaborate with IT and other departments to ensure data protection is integrated into all aspects of the business

Requirements:

• Bachelor's degree in Law, Computer Science, or a related field
• 3+ years of experience in data protection, compliance, or a related field
• Strong knowledge of data protection regulations, including GDPR and CCPA
• Excellent communication and interpersonal skills
• Ability to work independently and as part of a team

Benefits:

• Competitive salary and benefits package
• Opportunity to work with a leading company in the industry
• Collaborative and dynamic work environment

If you are a motivated and detail-oriented individual with a passion for data protection, we encourage you to apply for this exciting opportunity.

Experience Level: entry Employment Type: full-time Workplace Type: onsite Category: Legal Industry: Technology Salary Range: Not stated Salary Min: Not stated Salary Max: Not stated Salary Currency: USD Salary Period: year Required Skills: data protection, compliance, GDPR, CCPA, policy development, incident response, auditing, risk assessment Preferred Skills: None

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We are looking for a C++ engineer to design and build high-performance, low-latency applications that process large volumes of real-time data.

Principal Responsibilities:

• Design, implement, and maintain high-performance C++ services handling high message rates and low-latency workloads.

• Optimise existing components for latency, throughput, and CPU/memory efficiency.

• Develop and tune networking, messaging, and I/O layers to handle large data volumes reliably.

• Profile and debug performance issues at application, OS, and network levels.

• Collaborate with quantitative, trading, and infrastructure teams to translate requirements into robust technical solutions.

• Write clean, production-quality code with appropriate tests and documentation.

• Participate in code reviews, design discussions, and continuous improvement of engineering practices.

Required Qualifications:

• Strong proficiency in modern C++ (C++17/20 or later).

• 5+ years of experience.

• Analytics Focus: KDB / Q Experience for large market data, modern data analysis with pytorch, pandas and modern tooling including Apache arrow.

• Familiar with basics statistics as applied to financial research.

• Proven experience building performance-critical, real-time, or low-latency systems.

• Strong knowledge of computer science fundamentals: data structures, algorithms, memory management, and optimisation.

• Experience using profiling, benchmarking, and performance analysis tools.

• Proficiency with version control (Git) and standard build systems.

• Excellent problem-solving skills and attention to detail.

• Strong interpersonal skills with a proven ability to navigate large organisations.

Preferred Qualifications:

• Experience with kernel bypass or user-space networking technologies.

• Familiarity with AI productivity enhancing coding tools.

• Experience in financial markets, market data distribution, order routing, or exchange connectivity.

• Experience with monitoring/telemetry for high-performance systems.

• Familiarity with scripting languages for tooling and automation.

• AI: Familiarity with AI productivity enhancing coding tools.

Personal Attributes:

• Obsessed with performance, measurement, and data-driven optimisation.

• Comfortable owning features end-to-end and operating in a production environment.

• Clear communicator who can work closely with both technical and non-technical stakeholders.

• Proactive, self-directed, and able to thrive in a highly iterative environment.

The estimated base salary range for this position is $175,000 to $250,000, which is specific to New York and may change in the future.

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SPEED delivers the live trading and market-data platforms used by portfolio managers and risk systems, including Latency Critical Trading (LCT), DMA OMS (Client Direct), DMA market data feeds, packet capture (PCAPs), enterprise market data, and intraday data services across latency tiers from sub-100 nanoseconds to millisecond-sensitive workflows.

As a Senior Developer Infrastructure Engineer on SPEED, you will own and evolve the build and CI/CD infrastructure that underpins these mission-critical systems.

By designing scalable build pipelines, shared tooling, and reliable release workflows, you will directly enhance developer productivity and enable fast, safe iteration on some of the firm's most performance-sensitive code.

This role offers the opportunity to shape core engineering practices while contributing to platforms that are central to Millennium's trading edge.

Principal Responsibilities

• Design, build, and maintain a highly scalable, parallel, and cached build system for a large, performance-sensitive codebase.

• Own and continually optimise CI/CD pipelines to minimise build/test times, reduce flakiness, and improve developer productivity.

• Operate with an AI-first mindset across the SDLC, using automation by default to streamline build, test, and release workflows.

• Integrate and operationalise AI tools (e.g., copilots, workflow automation, AI-driven analytics) to eliminate manual toil, accelerate development, and codify reusable AI-enabled patterns for the broader engineering organisation.

• Design and operate containerised environments (e.g., Docker, Kubernetes) to maximise utilisation, reliability, and scalability across environments.

• Implement and manage artifact storage, dependency management, and versioning strategies for large, distributed systems.

• Develop and maintain shared libraries, CLIs, scripts, and internal platforms that reduce friction and enable self-service for engineers.

• Build and enhance test suites and environment provisioning, leveraging AI and automation where appropriate for smarter checks, triage, and observability.

• Monitor, instrument, and improve the reliability, observability, and performance of build and CI/CD systems using metrics, dashboards, and alerting.

• Partner with trading and engineering teams to understand requirements, remove friction, and champion best practices for building, testing, and releasing software.

Qualifications/Skills Required

• 5+ years of software engineering or DevInfra/Platform/DevOps experience, with significant focus on building systems and CI/CD.

• Strong programming skills in one or more languages (e.g., Python, Rust, Go, C++) for automation and tooling.

• Hands-on experience with at least one modern build system (e.g., Bazel, Buck2).

• Solid understanding of source control (Git), branching strategies, and release management.

• Experience with monorepos is a plus.

• Experience scaling build and test infrastructure for growing codebases and teams (parallelization, test sharding, remote execution, caching).

• Experience designing or participating in processes, systems, or playbooks that leverage AI to streamline work rather than needing to add more headcount to the team.

• Familiarity with containers and cloud infrastructure (Docker, Kubernetes, and major cloud providers such as AWS/GCP/Azure).

• Strong communication and collaboration skills; comfortable partnering with multiple teams and driving cross-cutting initiatives.

The estimated base salary range for this position is $175,000 to $250,000, which is specific to New York and may change in the future. Millennium pays a total compensation package which includes a base salary, discretionary performance bonus, and a comprehensive benefits package. When finalising an offer, we take into consideration an individual's experience level and the qualifications they bring to the role to formulate a competitive total compensation package.

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As a Senior HFT Developer on SPEED, you will design and build core low-latency components for order entry, market data, exchange simulation, feature extraction, and strategy containers, initially focused on delivering the full set of capabilities required for trading and research infrastructure. You will collaborate closely with system architects and quantitative researchers, operate and optimise these systems in production, and have clear opportunities to grow into technical and team leadership as the effort scales.

Principal Responsibilities:

• Build low-latency infrastructure for order entry, market data, exchange simulators, feature extraction, strategy container, and other systems.
• Build convenience layer tools and services to facilitate trading teams onboarding at MLP.
• Provide level 2 support for the systems in production.
• Work closely with the SPEED architect, quantitative researchers, and the business to provide high ROI solutions that are aligned with both the business and the platform strategy.
• Opportunities for growth in terms of leadership as effort expands.
• Will liaise with many other MLP teams depending on project focus.

Qualifications/Skills Required:

• 5+ years with a well-regarded HFT group, delivering production-grade, low-latency systems.
• Demonstrated expertise in C++ and Python for production, low-latency systems.
• Deep familiarity with low-level Systems: OS tuning, networking stack, user-space drivers, and kernel-bypass patterns.
• Strong understanding of the HFT quantitative research pipeline.
• Experience with HPC grids (scheduling, storage, job management) for research and production workloads.
• Cloud experience (AWS, GCP) is a plus.
• Proven ability to navigate large organisations, create cross-team synergies, and influence outcomes.
• High accountability and ownership; able to self-manage time, set priorities, and meet deadlines.
• Potential to provide technical leadership and manage a small team.

The estimated base salary range for this position is $175,000 to $250,000, which is specific to New York and may change in the future. We pay a total compensation package which includes a base salary, discretionary performance bonus, and a comprehensive benefits package.

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Responsibilities

• Act as front line support for local and/or time zone based employees.
• Serve as the main point of contact for our customers via email, walk ups, and chat support.
• Respond promptly and professionally to customer inquiries and troubleshoot issues related to our products and services.
• Utilize relevant software and databases to effectively diagnose, track and resolve customer issues and address complaints.
• Maintain accurate records, including call logs and ticketing systems, to track customer interactions and issue resolution.
• Collaborate with other teams to identify and resolve technical issues.
• Stay up to date with industry trends and provide input on continuous improvement to the Helpdesk and customer service workflows.
• Identify and escalate issues requiring urgent attention to the appropriate parties.
• Ensure SLAs are met and that our internal users are provided with an exceptional user experience.
• Ensure that all IT assets in the local office are managed and maintained to a high standard.
• Ensure compliance with all relevant regulations and legislation related to workplace services, health and safety, and environmental management.
• Collaborate with other senior leaders and stakeholders to build a strong culture of innovation, continuous improvement, and learning across the organisation.

Requirements

• Global experience within a business services environment and ideally video games development and/or working in a highly technical development environment.
• Strong Active Directory and Google Workspace Knowledge is required.
• Strong knowledge of first and second line support operations.
• Strong knowledge of ServiceNow and industry trends.
• Excellent relationship building skills.
• Ability to work in a matrix management environment.
• Proven work experience in a customer service or Helpdesk role.
• Excellent communication and active listening skills with a customer-first mindset.
• Ability to operate effectively in a dynamic, fast-paced environment and multitask effectively.
• Ability to learn quickly and adapt to new software applications and technologies.
• Excellent problem-solving and conflict resolution skills.
• Strong customer service orientation, with a focus on delivering high-quality services to employees and stakeholders.

Benefits

• Generous Paid Annual Leave – enjoy the time you need to recharge.
• Family Care Leave – support for your loved ones when it matters most.
• Enhanced Sick Leave – we care about your health and wellbeing.
• Training & Development Opportunities – grow your skills and career with us.
• Flexible Benefits Package – tailor your benefits to suit your lifestyle.
• Employee Assistance Programme (EAP) – confidential support for personal or work-related challenges affecting your wellbeing.
• Comprehensive Medical Insurance, including dental coverage.
• Welcome Pack for New Hires – a great start to your journey with us.

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