About Millennium: Millennium is a global, diversified alternative investment firm, founded in 1989. Defined by evolution, innovation and focus, Millennium’s mission is to deliver results for our investors.

Job Description: The .NET Developer will be part of the Information Technology organization, supporting an active, multi-manager business model. The Back Office App Dev team works within a flexible, scalable technology environment built around advanced proprietary systems and the continued development of next-generation analytical and operational capabilities.

Responsibilities:

• Develop, enhance, and own software solutions in a hands-on engineering environment
• Partner with team members to design and architect scalable, maintainable solutions
• Analyze application behavior and data to identify defects, resolve issues, and recommend improvements
• Take end-to-end ownership of projects while managing stakeholder expectations and delivery priorities
• Contribute to reliable, secure, and efficient application development across the full software development lifecycle
• Support integration, testing, and deployment activities to help ensure high-quality releases
• Participate in Agile team practices and collaborate effectively across development and user-facing teams

Requirements:

• 5+ years of production-level experience developing applications with .NET Core
• Strong object-oriented programming skills and hands-on experience with .NET Core, Microsoft SQL Server, and PostgreSQL
• Experience using AI effectively to produce clean, secure, and efficient code
• Solid understanding of streaming and distributed application patterns, including Kafka and microservices
• Strong coding standards, with the ability to write reliable, readable code and provide thoughtful code review feedback
• Working knowledge of Agile delivery methods and DevOps CI/CD practices, including tools such as JIRA
• Deep understanding of the software development lifecycle, including integration and testing
• Strong analytical, problem-solving, and communication skills, with the ability to work independently in a fast-paced environment

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As a Full Stack Developer, you will architect, build, and support full-stack applications and platform components that power critical business processes across the firm. You will partner with business analysts, product management, engineering teams, and senior stakeholders to turn business requirements into scalable technical solutions.

Responsibilities:

• Develop and enhance application components across the stack, including user interfaces, backend services, APIs, and reporting solutions.
• Design and deliver responsive, performant, and intuitive web experiences using modern UI technologies and sound UX practices.
• Build and integrate backend services and RESTful APIs with enterprise systems and data sources to enable seamless connectivity.
• Execute the full software development lifecycle, including design, development, testing, deployment, documentation, and ongoing enhancement.
• Apply strong engineering discipline through maintainable design patterns, unit testing, mock-based testing, and adherence to development standards.
• Troubleshoot and improve existing applications while contributing to continuous improvements across the application stack, architecture, and development practices.

Requirements:

• 8+ years of full-stack software development experience in enterprise environments.
• Strong backend engineering experience in Python or C#/.NET Core, with the flexibility to work effectively in language-diverse teams.
• Proven experience building modern UI applications with Angular, React, or comparable JavaScript frameworks.
• Strong experience designing, building, and consuming RESTful APIs and integrating distributed application services.
• Deep relational database expertise, including SQL Server and PostgreSQL, with strong SQL and stored procedure development skills.
• Solid understanding of object-oriented programming, design patterns, software architecture, and maintainable application design.
• Experience working with modern engineering tools and practices, including GitHub, Jenkins, JIRA, Agile delivery, DevOps, and SDLC methodologies.
• Strong communication, collaboration, and ownership skills, with the ability to work independently and manage multiple priorities effectively.

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You will work closely with UI engineers, algorithmic developers, product, quantitative, and backend engineering teams to deliver real-time data visualizations, workflows, and dashboards that support trading and risk management.

Responsibilities:

• Design, build, and maintain React-based user interfaces that power core trading application workflows
• Implement real-time data visualizations for orders, prices, positions, and other key metrics using streaming technologies such as WebSockets
• Turn product requirements and stakeholder feedback into intuitive, efficient, and scalable user experiences, rapidly prototyping and iterating on new features
• Optimize front-end performance, responsiveness, and reliability across complex, data-intensive screens
• Partner with backend engineers to integrate REST and WebSocket APIs, as well as WebAssembly-based components
• Write clean, testable, well-structured code supported by unit and integration tests
• Provide best practices around code reviews, front-end architecture decisions, and developer-level production support for the front-end components
• Prototype, iterate, and support front-end components in production to ensure a high-quality user experience

Requirements:

• Bachelor’s degree in Computer Science or a related field
• 5+ years of professional experience building web applications with JavaScript/TypeScript
• 5+ years with React in production, including substantial experience with hooks, functional components, and modern patterns
• Strong knowledge of modern JavaScript (ES6+), HTML5, and CSS3
• Experience with real-time data UIs (tables, charts, dashboards) and (WebSockets, SSE, or similar streaming technologies)
• Experience with state management (e.g., Redux, Zustand, or similar)
• Ability to leverage LLM-assisted tools (e.g., code assistants) effectively in the development workflow
• Experience in fixed-income capital markets or other capital markets, specifically with concepts such as positions, P&L, risk metrics, and market data is a plus
• Good communication skills and ability to collaborate directly with non-technical stakeholders

Our tech stack:

• Front-end: React 18, TypeScript, AG Grid, Ant Design, WebSockets, WASM
• Back-end: Node.js, Java Spring Boot (used to bundle/serve the front-end , familiarity is a plus, not required), Rust
• Data: MS SQL, Elasticsearch
• Security/Auth: Kerberos, JWT

Benefits:

• 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.
• Comprehensive benefits package

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We are seeking a Commodities Content Engineer who will focus on building robust ETL workflows and data models on top of our commodities data platform. In this role, you will use Python and SQL to design, implement, and maintain pipelines that ingest, clean, transform, and catalog commodities datasets.

Key Responsibilities:

• Design and implement end-to-end ETL workflows in Python and SQL to ingest and transform commodities data from multiple vendors and internal sources.
• Build and maintain standardized data models, schemas, and metadata that make commodities datasets easy to understand and discover within the platform.
• Use Airflow or similar tools to schedule, monitor, and manage data pipelines, ensuring reliability and timely delivery.
• Implement robust validation, reconciliation, and anomaly-detection checks to ensure data completeness, correctness, and consistency.
• Leverage AI to automate schema inference across structured and semi-structured data sources, manage schema drift, and accelerate development of scalable ingestion pipelines.
• Apply AI-driven data quality, observability, and documentation capabilities to detect anomalies, monitor data health, and generate clear lineage and technical documentation across complex data workflows.
• Leverage Git, GitHub Actions, and automated testing (PyTest) to maintain high-quality code and repeatable deployments.
• Partner with commodities PMs, researchers, and data strategists to understand use cases and continuously refine datasets, definitions, and documentation.

Required Qualifications:

• 4 years of experience in data engineering, analytics engineering, or similar roles focused on building and maintaining ETL pipelines.
• Strong skills in Python and SQL, with experience working with large datasets and complex transformations.
• Hands-on experience with Airflow or other workflow schedulers.
• Familiarity with version control (Git), CI/CD pipelines (GitHub Actions or equivalent), and test automation (e.g., PyTest).
• Strong attention to detail, data quality, and documentation; ability to reason for edge cases and data integrity.
• Ability to work independently, communicate clearly with both technical and non-technical stakeholders, and manage work across multiple concurrent initiatives.

Preferred Qualifications:

• Knowledge of commodities markets and commodities data (e.g., weather, supply/demand, storage, freight, flows).
• Experience with data warehousing technologies (e.g., Snowflake, columnar storage formats, or analytic databases).
• Prior experience in a financial services, trading, or research-driven environment.
• Exposure to data catalog/data governance tools and best practices.

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.

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Responsibilities

• Partner directly with Portfolio Managers, traders, risk managers, and operations teams to understand business needs and translate them into practical technology solutions.
• Design, build, and maintain tools and applications supporting portfolio analytics, trading workflows, risk monitoring, and data-driven decision support across Credit Markets.
• Own the full development lifecycle, including requirements gathering, data analysis, solution design, implementation, testing, deployment, and production support.
• Rapidly prototype new ideas, validate them with users, and evolve successful prototypes into reliable production tools.
• Work closely with technology, quant, and data teams across New York, London, and Bengaluru to deliver integrated solutions.
• Contribute to strong engineering practices, including version control, testing, release discipline, observability, and supportability.

What Success Looks Like

• Front-office users can move from idea to working solution quickly and with minimal friction.
• Manual and spreadsheet-driven workflows are replaced with scalable, supportable applications.
• Portfolio managers and traders have better visibility into portfolio, market, and risk data.
• Tactical tools are delivered rapidly without compromising reliability, maintainability, or production readiness.

Mandatory Requirements

• 5–7 years of professional software development experience, with strong hands-on Python or C++/Java development in business-facing or high-performance environments.
• Strong experience with Python for data-intensive applications, including libraries such as pandas and NumPy.
• Experience building APIs and lightweight applications using frameworks such as FastAPI.
• Proven experience delivering end-to-end solutions, from problem definition and prototyping through deployment and production support.
• Strong analytical and problem-solving skills
• Strong communication skills and confidence working directly with Portfolio Managers
• Ability to work independently, manage competing priorities, and deliver effectively in a fast-paced environment.
• Bachelor’s degree in Computer Science, Engineering, Mathematics, Physics, or a related quantitative discipline.

Preferred Requirements

• Experience supporting credit businesses, including familiarity with credit products, portfolio analytics, risk concepts, and market data.
• Experience working closely with global teams across technology, quant, and risk functions.
• Experience using modern AI-assisted software development tools and workflows.
• Experience with AWS technologies such as S3, SQS, Batch, and Lambda.
• Experience with DevOps and deployment practices using technologies such as Docker and Kubernetes.
• Familiarity with financial mathematics and statistics.

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The successful candidate will be comfortable interacting directly with portfolio managers, and will bring strong project management, communication, domain knowledge, and collaboration skills.

Principal Responsibilities:

• Build and maintain strong relationships with portfolio managers and senior business management
• Act as a tech-savvy partner to PM teams, helping with technical inquiries and identifying the most suitable solutions
• Interface with stakeholders across the organisation at multiple levels of seniority
• Perform business analysis and project management, including requirements gathering across platforms and coordinating project-level integration
• Drive the rollout of our Launchpad and related application suite

Qualifications / Skills Required:

• 5+ years of relevant experience
• Solid financial markets experience, including exposure to trading applications, risk management, operations, middle office, and Fixed Income products
• Subject matter expertise in Fixed Income pricing and related technology
• Strong interpersonal, written, and verbal communication skills, with prior experience engaging directly with portfolio managers
• Business analysis and hands-on project delivery experience across the full SDLC for major change initiatives at an investment bank, buy-side firm, exchange, or software vendor
• Ability to communicate in detail with development teams and users, and to provide clear, concise updates to senior stakeholders
• Coding/scripting skills and experience using AI tools are a strong plus

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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The role is focused on Level 1+ support of Millennium's Rates, Credit, Mortgages, Commodities, and FX trading platforms, and monitoring systems.

Responsibilities

• Provide Level 1+ support for Fixed Income, Commodities, and FX Trading System users.
• Build up an understanding of various trading, trade processing, and risk reporting systems, including Front-end trading, Trade Capture, Risk and Pnl, Trade Repository, and Prime Brokerage clearing.
• Troubleshoot trade-related issues and train users on various platforms.
• Support Millennium's proprietary platform for electronic and algo trading, including testing, capturing requirements, and marketing and implementing algos with our PM teams.
• Monitor and support intra-day and EOD jobs, platform performance, enhance, and support of trade processing platform.

Qualifications

• 3-5 years front office trading support experience preferred.
• Knowledge and understanding of fixed income products (Rates, Credit, Futures, Derivatives), Commodities, and FX.
• Good team player who is able to prioritize competing demands in a fast-moving, high-pressure environment.
• Possesses a strong sense of urgency.
• Excellent written and oral communication skills.
• Detail-oriented, demonstrates thoroughness, and strong ownership of work.
• Quick thinker and problem solver, able to think on their feet and make informed decisions to resolve/mitigate issues.
• Experience with 3rd party trading systems (Bloomberg FIT/ALLQ/FXGO/CDX/IRS, Brokertec, Tradeweb, MarketAxess, Trading Technologies (TT), WebICE, CME Direct, etc.) is a plus.
• Experience with Bloomberg and/or Reuters is a plus.
• Interest in financial markets and news a plus.
• Unix shell experience a plus.

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The successful candidate will focus on a Private Credit buildout, with particular emphasis on equities and options, and on integrating with third-party platforms such as Murex and ION. They will design, develop, and maintain Java-based services that support a real-time trade capture platform for our autocallable buildout, and build and support Kafka-based streaming pipelines to process, normalize, and distribute trading and reference data to downstream systems.

Key responsibilities include collaborating closely with portfolio managers, traders, operations, and risk teams to understand requirements and translate them into robust technical solutions, contributing to the architecture and design of low-latency, high-availability components, including multithreaded and distributed systems, and monitoring, troubleshooting, and resolving production issues related to trading workflows, data integrity, and system performance.

We are looking for a highly skilled and experienced software engineer with a strong background in Java, Kafka, and front-end technologies using Typescript/Javascript, in this role you'll be using Angular. You should have a solid understanding of object-oriented design, design patterns, and multithreading in distributed systems, and hands-on experience with unit testing and integration testing frameworks and best practices.

In addition, you should be familiar with CI/CD pipeline (Jenkins) and DevOps tools/practices (e.g., Git, build tools, automated testing, deployment automation), experience with SQL databases such as Postgres and SQLServer, and comfort with modern IDEs and developer productivity tools; openness to using AI-assisted development tools and modern developer workflows.

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.

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This individual will lead product development and execution across various systems, workflows, analytics that support margin analytics, cash consumption, liquidity risk, etc. The Cross Asset Quant & Technology Modeling team designs, builds, and maintains the applications and models that support portfolio managers, risk managers, and treasury professionals across the company.

The ideal candidate will bring a strong product mindset, solid technical fluency, and experience working across quantitative workflows, data platforms, and front-to-back capital markets infrastructure.

Responsibilities:

• Partner closely with Treasury, Risk, Quants, Operations, and Engineering to define and deliver products that support cash and collateral management, liquidity forecasting, funding optimization, and margin analytics.
• Own the product roadmap for Treasury-related applications, data products, and workflows, ensuring priorities are aligned with business goals and delivered effectively.
• Translate business needs into clear product requirements, functional designs, and technical specifications
• Work with engineering and quantitative teams to build and enhance tools that improve visibility into liquidity, collateral usage, margin requirements, funding exposures, and treasury risk.
• Serve as a key point of contact for senior stakeholders with Treasury providing clear updates and helping drive alignment and decision-making.
• Coordinate cross-functional teams across product, engineering, quantitative modeling, and business functions to keep delivery on track, remove blockers, and resolve issues quickly.
• Gather and document business requirements, perform gap analysis, and ensure solutions meet business objectives and fit into the broader Treasury and risk platform ecosystem.
• Identify project and product risks early, develop mitigation plans, and escalate issues as needed to support successful delivery.
• Track progress against timelines, objectives, and quality standards, and use feedback, metrics, and outcomes to improve product delivery over time.

Qualifications:

• 12+ years of experience in technical product management, quant management, or a similar role, with a strong track record of delivering complex technology solutions in financial services.
• Strong understanding of capital markets and Treasury-related functions, including cash and collateral management, prime brokerage (PB), margining, repo, securities lending, liquidity, and funding.
• Demonstrated ability to manage complex, cross-functional initiatives with multiple stakeholders and tight timelines.
• Strong business analysis skills, including requirements gathering, gap analysis, process mapping, and translating business needs into practical technical solutions.
• Strong leadership, communication, and interpersonal skills, with the ability to work effectively across both business and technical teams
• Strong analytical and problem-solving abilities, with comfort working with data, metrics, and financial concepts to support prioritization and decision-making.
• Exceptional organizational skills and attention to detail, with the ability to manage multiple priorities and keep workstreams moving in a fast-paced 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. 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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Principal Responsibilities:

• Develop and operate a recruiting platform for portfolio managers.
• Participate in the design of various functions for Salesforce CRM solution.
• Operate and further develop existing CRM and existing supporting products and applications.
• Develop interfaces between CRM software and other systems internal and external to Millennium.
• Lead the environment strategy as well as deployment strategy for the CRM solution.
• Stay up to date with the latest Salesforce releases, features, and best practices.

Qualifications/Skills Required:

• 10+ years of experience in Salesforce sales cloud development/support.
• 4-7 years software development experience.
• 3+ years of C#/.NET with proficiency in a web framework such as ASP.NET MVC.
• 2+ years of WebUI/JavaScript/HTML/CSS with proficiency in at least one web framework such as Angular, React/Redux, or Ember.
• In-depth knowledge of Salesforce Feedback Management, Salesforce Digital Experiences (Communities) and best practices.
• Drive AI Innovation: Proactively research, propose, and prototype AI-driven solutions that enhance business processes, customer experience, or operational efficiency within Salesforce.
• Track record of proposing or leading AI initiatives that resulted in measurable business impact.
• Experience building and consuming RESTful services.
• Experience building integration with third-party systems to a Salesforce CRM.
• Able to lead the Salesforce deployments.
• Design, customize and manage security entitlements for Salesforce sales cloud.
• Development experience in Microsoft SQL server, building complex SQL and stored procedures.
• Strong and effective interpersonal skills with proven ability to develop positive relationships with business partners.
• Highly analytical with good problem solving skills; able to work independently in a fast-paced 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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