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Principal Jobs in Westbury, NY

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Principal Software Engineer, Applied AI - Hybrid (LLM, Agentic, Claude Code, MCP) FactSet

Norwalk, New York

$180,000–$235,000 / year

Hands-on familiarity with AI coding assistants such as Claude Code , and a strong grasp of how the modern AI-driven development lifecycle (AI DLC) works, including how planning, implementation, review, testing, and deployment change when AI agents participate. Hands-on experience building and deploying applications using LLMs and agentic technologies (e.g., prompt engineering, RAG , function/tool calling, agent orchestration frameworks, MCP or similar protocols ).

1 day ago

Manager, Principal Software Engineer - Global Employer Services Technology Deloitte

New York, NY

$137,700–$261,625 / year

People within our technology group come from a diverse background - they partner with our go-to-market teams and global clients to solve challenging problems and design experiences and products that anticipate what our Deloitte clients will want and solutions that keep them compliant with global and local regulations. Elevate the organization by mentoring senior and staff-level engineers, developing technical leadership in others, and building the practices that let the team scale - while staying open to sharpening your own thinking through architects, quality engineers, and peers.

2 days ago

Sr. Principal Analyst, Microsoft Contract Negotiations & Licensing Gartner

Stamford, CT

Remote

Candidates must have current knowledge of Microsoft's commercial programs, contracting models, pricing, and discounting approaches as well as a vision for how Microsoft licensing, and overall contracting and negotiations with large vendors, will evolve globally and regionally. 8+ years' experience with a minimum of 5 years work experience in SaaS/software contract negotiations, technology procurement, category management, vendor management or software asset management within a buying organization, outsourcer, consulting firm, or reseller.

2 days ago

Senior / Principal Technical Recruiter Formation Bio

New York, NY; Boston

$154,500–$202,000 / year

Recognizing that this development bottleneck may ultimately limit the number of new medicines that can reach patients, Formation Bio, founded in 2016 as TrialSpark Inc., has built technology platforms, processes, and capabilities to accelerate all aspects of drug development and clinical trials. Formation Bio partners, acquires, or in-licenses drugs from pharma companies, research organizations, and biotechs to develop programs past clinical proof of concept and beyond, ultimately helping to bring new medicines to patients.

3 days ago

Senior / Principal Data Scientist, EHR AI Formation Bio

New York, NY; Boston

$185,500–$232,000 / year

Recognizing that this development bottleneck may ultimately limit the number of new medicines that can reach patients, Formation Bio, founded in 2016 as TrialSpark Inc., has built technology platforms, processes, and capabilities to accelerate all aspects of drug development and clinical trials. 2+ years of industry or research experience building machine learning models on EHR data, including linked claims or other real-world data, with substantiated results: peer-reviewed publications, deployed models, or externally validated performance.

3 days ago

Principal Software Engineer, Frontend North Cloud

Brooklyn, New York

$230,000–$270,000 / year

Your job is to make the right way to build frontend the easy way, so any engineer at North can ship changes that are consistent, fast, and well tested, and it's hard to ship ones that aren't. As our first Principal Software Engineer focused on frontend, you'll set the direction for how North looks, feels, and works, and you'll do it by building alongside the teams who ship it.

4 days ago

Launch Associate Principal Via Transportation Inc

New York City, NY

$95,000–$115,000 / year

For each launch, you will serve as the leader of a transit network transformation; taking full ownership of the technology and operational transition, service performance, partner relationships, and a 30+ frontline team. About You: Minimum of 3+ years of experience in operations, consulting, strategy, tech or a field with meaningful client accountability and a demonstrated ability to lead big projects and develop teams.

3 days ago

Principal Software Architect Cloaked

New York City, New York

$245,000–$275,000 / year

Alternatively, will accept a Bachelor’s degree (or equivalent foreign degree) in Computer Science, Applied Computer Science, Computer Engineering, or a closely related field and five (5) years of experience as a Software Engineer or a similar position responsible for software or systems engineering. This position requires a Master’s degree (or equivalent foreign degree) in Computer Science, Applied Computer Science, Computer Engineering, or a closely related field and three (3) years of experience as a Software Engineer or a similar position responsible for software or systems engineering.

4 days ago

Principal Polymer Processing Engineer, Injection Molding CONMED Corp

New York, NY

$138,700–$176,900 / year

This role provides technical leadership for the plastic parts design geometry for injection molding manufacturability; for new injection molds design conceptualization, manufacturing and performance testing; for the plastic injection molding cell equipment selection and performance testing; for the plastic injection molding process optimization and qualification; and for the sustaining support of the plastic injection molding process and mold's production life cycle maintenance for plastic parts used to manufacture medical devices and components. 2 years of experience applying technical knowledge and expertise troubleshooting injection molded parts noncompliance opportunities to determine whether root cause is part design geometry, raw material, raw material handling, molding process, mold steel dimensions, mold steel wear, mold design conceptualization, molding cell selection, molding cell functional performance, part's inspection method, inspection fixture, inspection equipment, parts conveying, parts packaging design, parts storing and/or part's transit related.

5 days ago

Principal Software Engineer, Applied AI - Hybrid (Llm, Agentic, Claude Code, Mcp) FactSet Research Systems Inc.

Norwalk, CT

$180,000–$235,000 / year

Hands-on familiarity with AI coding assistants such as Claude Code, and a strong grasp of how the modern AI-driven development lifecycle (AI DLC) works, including how planning, implementation, review, testing, and deployment change when AI agents participate. Hands-on experience building and deploying applications using LLMs and agentic technologies (e.g., prompt engineering, RAG, function/tool calling, agent orchestration frameworks, MCP or similar protocols).

3 days ago

Deployment Operations Associate Principal Via Transportation

New York City, NY

$95,000–$115,000 / year

As a Deployment Operations Associate Principal, you will launch new Via markets around the world and ensure the success of the day-to-day management of our partner deployments, while gaining exposure to operations, entrepreneurship, product and business development. What You'll Do: Launch new Via deployments, take full ownership in ensuring every aspect of new deployments is executed on time at the highest possible quality.

5 days ago

Launch Associate Principal Via Transportation

New York City, NY

$95,000–$115,000 / year

5 days ago

Principal Engineer, Frontend Trojan Trading

New York, New York

$300,000–$500,000 / year

It is a unified base of operations, a place where users retain custody of their funds, data is live and accurate, execution is nearly instant and accurately priced, charting is simple and powerful and where every market, no matter how new, is accessible. Leadership Insight : Must have experience working alongside leadership and founders to make key decisions about the frontend of a trading web app including, but not limited to, tech stack, product design, and feature design.

4 days ago

Underwriting Principal Fifth Third Bancorp

New York, NY

$96,500–$207,500 / year

Responsible for identifying, assessing and communicating credit risks; performing detailed due diligence and financial analysis; and supporting sound underwriting decisions within established policies and risk appetite, with escalation of complex, sensitive or policy-exception transactions as required. The base salary for this position is reflective of the range of salary levels for all roles within this pay grade across the U.S. Individual salaries within this range will vary based on factors such as role, relevant skillset, relevant experience, education and geographic location.

5 days ago

Principal Enterprise Architect Reltio Inc

$230,000–$310,000 / year

Leveraging deep expertise in master data management, data unification, AI, and enterprise architecture, this individual engages C-suite executives like CDOs, Chief Architects, CIOs, and CTOs at the world''s leading organizations to architect how Reltio, as part of SAP Business Data Cloud, transforms their most complex enterprise data landscapes. Skills You Must Have: Minimum 15 years of pre-sales, solution architecture, or enterprise architecture experience in enterprise software, with an extensive, demonstrable track record on highly complex, strategic data unification, AI, and platform engagements; Bachelor''s degree in Computer Science, Engineering, or experience in a deeply related technical field.

7 days ago

Senior Principal Scientist, Bioprocess Development Pfizer

Pearl River, New York

$124,400–$207,400 / year

The successful candidate will be responsible for the development of scalable manufacturing processes across microbial fermentation, purification and scale up, shaping process development plans, integrating technical input across disciplines, mentoring scientific staff, managing risks, and influencing key program decisions from early-stage development through technology transfer and clinical manufacturing readiness. Candidate demonstrates a breadth of diverse leadership experiences and capabilities including: the ability to influence and collaborate with peers, develop and coach others, oversee and guide the work of other colleagues to achieve meaningful outcomes and create business impact.

4 days ago

Principal Systems Architect, RF Communications Hardware | Axon 911 R &D (Remote Eligible | Relocation Assistance Available) Axon

New York, New York

Remote

$157,950–$242,190 / year

You will partner closely with Electrical Engineering (EE), Radio Frequency (RF) Engineering, Software (SW) Engineering, and Mechanical Engineering (ME) leads to define system requirements, drive cross-functional design decisions, and ensure each subsystem comes together as a cohesive, production-ready device. Familiarity with relevant hardware design, simulation, testing, and lifecycle tools, such as Altium/Cadence, SolidWorks/Creo/NX, RF and electrical test equipment, thermal characterization tools, and PLM/BOM or requirements-management systems.

6 days ago

Principal Attorney (Contract Administration) NYC School Construction Authority

New York City, New York

$131,026–$210,000 / year

The Principal Attorney advises on SCA’s procurement and contracting activities, including reviewing, drafting, and negotiating procurement and contract documents, interpreting applicable legal requirements, identifying and mitigating legal risks, and ensuring compliance with applicable laws, regulations, and SCA policies. The Principal Attorney for Contract Administration reports to the General Counsel and provides legal advice and guidance on all Authority procurement and related contracting matters, including construction, design, goods, and professional services.

6 days ago

Principal Implementation Manager - Equities / Investment Software Implementation - Charles River Development State Street Corporation

Clifton, NJ

$120,000–$202,500 / year

Principal Consultants are expected to demonstrate basic understanding of the entire CRIMS offering and advanced proficiency in at least one of the following areas: Compliance, Equity, Fixed Income, Investment Solutions, Technology, Wealth Management or Project Management. Their contributions include defining client requirements, configuring and tuning the solution to the client's business and technical needs, training clients, testing workflows and resolving issues before taking the client "live".

4 days ago

Assistant Principal of Specialty (2027-2028) Zeta Charter Schools

New York City, NY

$105,000–$122,000 / year
Full time

We are searching for an Assistant Principal of Specialty who is an exceptional instructional and people leader with a deep passion for Specialty education and the ability to establish excellence across diverse disciplines, develop outstanding teachers, and create joyful, engaging programs that help every student thrive and realize their fullest potential. Set and uphold an uncompromising bar for Specialty excellence, ensuring rigorous curriculum execution, purposeful planning, strong instruction, and student mastery while taking full ownership of the quality of Specialty programming across elementary, middle, and high school.

7 days ago

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Principal Jobs in Westbury, NY

Principal Software Engineer, Applied AI - Hybrid (LLM, Agentic, Claude Code, MCP) FactSet

Manager, Principal Software Engineer - Global Employer Services Technology Deloitte

Sr. Principal Analyst, Microsoft Contract Negotiations & Licensing Gartner

Senior / Principal Technical Recruiter Formation Bio

Senior / Principal Data Scientist, EHR AI Formation Bio

Principal Software Engineer, Frontend North Cloud

Launch Associate Principal Via Transportation Inc

Principal Software Architect Cloaked

Principal Polymer Processing Engineer, Injection Molding CONMED Corp

Principal Software Engineer, Applied AI - Hybrid (Llm, Agentic, Claude Code, Mcp) FactSet Research Systems Inc.

Deployment Operations Associate Principal Via Transportation

Launch Associate Principal Via Transportation

Principal Engineer, Frontend Trojan Trading

Underwriting Principal Fifth Third Bancorp

Principal Enterprise Architect Reltio Inc

Senior Principal Scientist, Bioprocess Development Pfizer

Principal Systems Architect, RF Communications Hardware | Axon 911 R &D (Remote Eligible | Relocation Assistance Available) Axon

Principal Attorney (Contract Administration) NYC School Construction Authority

Principal Implementation Manager - Equities / Investment Software Implementation - Charles River Development State Street Corporation

Assistant Principal of Specialty (2027-2028) Zeta Charter Schools

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