31 principle developer jobs at 25 companies in Fairfield, CT

3mo
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Principle Engineer - Rates and cross asset electronic trading platforms
New York or Iselin or Charlotte
$159k-$305k/yr HybridFull Time
Wells Fargo
Wells FargoNYSE: WFC: Global provider of banking, investment, and mortgage financial services.
7+ YOE7+ years in engineering and electronic trading; deep experience in rates/fixed income e-trading; high-performance, low-latency trading systems; strong Java (and Python/C++ as applicable); FIX protocol knowledge.
Java, Python, C++
2mo
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Principle Software Engineer, AI Observability & Evals Platform
Boston or San Francisco or New York City
$230k-$270k/yr OnsiteFull Time
LangChain
LangChain: Tools for building and deploying production-ready AI agents.
10+ YOE10+ years backend or full-stack engineering; strong Python/Go; TypeScript/React; architectural decisions; reliable, scalable systems; mentoring.
Python, Go, TypeScript, React
1w
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Site Reliability Engineer III- Production Management
New York or New York
$133k-$185k/yr OnsiteFull Time
JPMorgan Chase
JPMorgan ChaseNYSE: JPM: Global financial services firm providing banking and investment solutions.
3+ YOE3+ years applied SRE experience, formal SRE training, proficiency with SRE principles, programming (Python/Java/.Net), cloud (AWS), observability and incident management.
Python, Java, Spring Boot, .Net, AWS, Datadog, Kafka, MQ
4d
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Mid-level Full Stack Software Developer- Onsite, West Point, NY
West Point, New York, United States
$95k-$125k/yr OnsiteFull Time
BluePath Labs
BluePath Labs: Provides consulting, research, and technical solutions for government missions.
5+ YOEBachelor's in CS/SE/CE/EE/ISYS or related, 5+ years experience, proficiency in JavaScript and Python, experience with Docker, Flask, React, Svelte, PlotlyDash, SQL, networking and security principles, U.S. citizenship, ability to obtain DoD Secret clearance.
JavaScript, Python, Docker, Flask, React, Svelte, PlotlyDash, SQL
3d
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Electrical / Electromechanical Product Engineer
Paramus, New Jersey, United States
$100k-$125k/yr OnsiteFull Time
VERSA Products Co., Inc.
VERSA Products Co., Inc.: Manufacturer of pneumatic and hydraulic directional control valves.
3+ YOEB.S. in Electrical Engineering, 3+ years manufacturing experience, hands-on electro-mechanical design, EM principles, strong verbal/written communication.
2mo
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Security Engineer
Bellevue or Menlo Park or Washington or New York
$271k-$347k/yr OnsiteFull Time
Meta
MetaNASDAQ: META: Develops social networking platforms and virtual reality technologies.
15+ YOEB.S. in CS or related; 15+ yrs security risk management; 15+ yrs cross-company engineering; system design, threat modeling; engineered controls; security principles; threat knowledge; distributed systems; strong communication.
2mo
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Cybersecurity Engineer - Cryptography - Director
New York, New York, United States
$120k-$165k/yr OnsiteFull Time
Morgan Stanley
Morgan StanleyNYSE: MS: Provides global investment banking, wealth management, and advisory services.
5+ YOE5+ years in cybersecurity engineering/operations; PKI, HSM, certificate management; cryptographic principles and enterprise cryptography; automation/scripting; PQC awareness; CISSP/CISM preferred.
PKI, HSM, certificate management, Python, PowerShell
3w
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Manufacturing Engineer I
Orange, Connecticut, United States
$73k-$112k/yr OnsiteFull Time
Saint-Gobain
Saint-GobainEuronext Paris: SGO: Global leader in light and sustainable construction and materials.
1+ YOEBachelor's degree in engineering, 1+ years manufacturing engineering experience, SolidWorks/AutoCAD and Microsoft Office proficiency, knowledge of welding/metal work and lean principles, strong troubleshooting and communication skills; U.S. Person required (ITAR).
SolidWorks, AutoCAD, Microsoft Word, Microsoft Excel, Microsoft PowerPoint
4w
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QA Engineer
Zagreb or Croatia or New York City
HybridFull Time
Microblink
Microblink: Provides AI software for automated document scanning and identity verification.
2+ YOE2+ years software testing experience, strong QA principles, mobile/SDK testing experience, English proficiency, residency and work authorization in Croatia required; familiarity with Android/iOS/Web testing and issue analysis.
Playwright, Appium, TypeScript, Xcode, Android Studio, Microsoft Visual Studio Code, Docker, Postman, Git, BrowserStack, React Native, Flutter
1mo
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Senior Control Engineer
New York, New York, United States
$175k-$200k/yr OnsiteFull Time
Rockefeller Capital Management
Rockefeller Capital Management: Provides wealth management and financial advisory services to clients.
8+ YOE8+ years engineering experience in systems, software, and cloud infrastructure; deep knowledge of networking, Windows/Linux/Unix, distributed/cloud architectures; security control testing, monitoring, incident response, SRE principles, application security, and automation.
Python, PowerShell, Bash, CI/CD, infrastructure-as-code, Azure, AWS, GCP, NIST, MITRE, CSA, CIS, DevOps
1w
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Intermediate Substation Structural Engineer
Freeport or Hallowell or New York or Syracuse or Ann Arbor or New Albany
$74k-$127k/yr OnsiteFull Time
WSP
WSPToronto Stock Exchange: WSP: Provides engineering, design, and environmental consultancy services globally.
1+ YOEBachelor's in structural or civil engineering,1+ years relevant experience,knowledge of structural engineering principles,codes,and discipline-specific design software;strong communication and analytical skills.
MicroStation, AutoCAD, Civil 3D, ArcGIS, InRoads, Geopak, GeoSlope, ANSYS, STADD, HEC-RAS, HEC-HMS
1w
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IT Senior Security Engineer (Hybrid)
Berlin, Connecticut, United States
$122k-$136k/yr HybridFull Time
Eversource Energy
Eversource EnergyNYSE: ES: Delivers electricity, natural gas, and water to New England customers.
5+ YOEMinimum 5 years experience in security engineering; mastery of security principles, access control, monitoring, and system administration; Bachelor\u0002s in Computer Science/Engineering or equivalent; available for emergency restoration assignments.
firewalls, content scanners, usage monitors, encryption, VPN, security scanning tools
3d
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Returning Part-Time New Grad Engineer I - New York (For Current/Former HNTB Interns Only)
New York, New York, United States
$66k-$125k/yr OnsitePart Time
HNTB
HNTB: Designs and manages large-scale transportation and infrastructure projects.
Bachelor's degree in Engineering required; understanding of engineering principles; familiarity with Microsoft Office, MicroStation and/or AutoCAD; EIT certification preferred.
Microsoft Office Suite, MicroStation, AutoCAD
3d
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Returning New Grad Engineer I - Winter/Summer 2027 - Northeast Division (For Current/Former HNTB Interns Only)
New York or South Portland or Princeton or Bedford or Boston or Newark or Cherry Hill or Parsippany or South Norwalk or Rocky Hill or Chelmsford
$66k-$125k/yr OnsiteFull Time
HNTB
HNTB: Infrastructure design and engineering for transportation and public works
Bachelor's degree in Engineering required; knowledge of engineering principles; familiarity with Microsoft Office, MicroStation and/or AutoCAD; EIT preferred; master's preferred.
Microsoft Office, MicroStation, AutoCAD
1mo
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Field Engineer Sr. - United Kingdom (EXPAT)
Barrow-in-Furness or Cape Canaveral or Groton or Kings Bay or Silverdale or Uniondale or Connecticut or Florida or Georgia or New York or Washington or United Kingdom
$89k-$178k/yr OnsiteFull Time
Lockheed Martin
Lockheed MartinNYSE: LMT: Designs and manufactures global security and aerospace systems.
Active DoD Secret clearance (or higher) prior to start with ability to obtain Top Secret, willing to expatriate to the UK for 3+ years, experience with navigation/inertial principles, ability to climb ladders and work in confined spaces, Trident/FBM/SSBN experience preferred.
3w
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Principal Engineer, Digital Workplace Technology Engineering
New York or New Jersey or Los Angeles or United States
$180k-$210k/yr RemoteFull Time
NBCUniversal
NBCUniversalNASDAQ: CMCSA: Produces and distributes entertainment content and theme park experiences.
12+ YOE12+ years in enterprise/platform engineering; deep expertise in Microsoft 365, endpoint management (Intune, JAMF, SCCM), Azure, enterprise AI (Copilot, Power Platform), architecture, SRE principles, and large-scale platform transformations.
Microsoft 365, Microsoft Teams, Microsoft SharePoint, Microsoft OneDrive, Microsoft Exchange Online, Microsoft Entra ID, Microsoft Purview, Microsoft Defender, Microsoft Intune, JAMF, Microsoft SCCM, Microsoft Copilot, Copilot Studio, Microsoft Power Platform, Microsoft Power Apps, Microsoft Power Automate, Microsoft Azure, MLOps, DevOps
1w
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Communications Field Engineer for System Performance & Infrastructure
Rye, New York, United States
$105k-$135k/yr FieldFull Time
Consolidated Edison
Consolidated EdisonNYSE: ED: Provides electric, gas, and steam services in New York.
3+ YOE3+ years telecom/IT experience (varies by degree), experience with fiber/DWDM, microwave/RF, IP networking, cybersecurity principles, preventive maintenance, vendor/SLA oversight, and ability to work off-hours and travel within service territory.
DWDM, OTN, MPLS, Microsoft Word, Microsoft Excel, Microsoft Outlook, Microsoft PowerPoint
1mo
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Associate or Senior Associate, Fixed Assets / Cost Segregation Engineer (AMCS)
Boston or New York City or Philadelphia or Pittsburgh
OnsiteFull Time
KPMG
KPMG: Global professional services network providing audit, tax, and advisory.
1+ YOEBachelor's in engineering/architecture/construction management,1+ year experience (2+ preferred for Senior),knowledge of construction/building systems,familiarity with federal depreciation principles,advanced Excel and data tools.
Microsoft Excel, Power Query, Alteryx, Power BI, Tableau, SQL, Python, R
2w
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Strategy and Business Development Team Member
San Francisco or New York City or Denver or Austin or Calgary or Toronto or United States
$119k-$138k/yr RemoteFull Time
Intersect
IntersectNASDAQ: GOOGL: Develops-located data centers and renewable energy infrastructure.
Bachelor's in a quantitative field preferred; experience developing first-principles engineering/techno-economic models; proficiency in Python or similar; strong analytical and communication skills.
Python, Julia, MATLAB, R
1w
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Senior Principal Software Architect - Healthcare
United States or New York City
$205k-$220k/yr HybridFull Time
Progyny
ProgynyNASDAQ: PGNY: Provides fertility and family building benefit solutions for employers.
Hands-on architect with deep cross-domain knowledge, technical leadership, roadmap development, and ability to drive adoption of architecture principles and standards.