413 lead system engineer jobs at 230 companies in Fairfield, CT

PromotedHiringCafe
Founding Backend / Infra Engineer
Cupertino, CA, US
$160k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Own the crawlers, pipelines, and infrastructure powering a real-time job search engine. Strong Node.js and Python fundamentals; bonus points for security and reverse-engineering chops.
Node.js, Python, Elasticsearch, Redis
2d
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Lead Engineer - Electric System
Brewster, New York, United States
$106k-$133k/yr OnsiteFull Time
Iberdrola
IberdrolaBME: IBE: Generates and distributes renewable electricity and natural gas globally.
7+ YOEBachelor's in engineering preferred,7+ years electrical utility engineering experience, CAD/PLS‑CADD/AutoCAD skills, SAP/Primavera/Microsoft proficiency, PE preferred, strong communication and leadership.
PLS-CADD, Microsoft Excel, SAP, Primavera, AutoCAD, CAD
1mo
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Lead Engine Cooling System Engineer
Novi or Charlotte or San Francisco or Los Angeles or New York City
$160k-$193k/yr OnsiteFull Time
Scout Motors
Scout Motors: Designs and manufactures all-electric rugged SUVs and trucks.
12+ YOEBachelor’s in mechanical engineering (Master's preferred), 12+ years engineering experience, 8 years thermal systems design, leadership experience, simulation and prototyping/testing skills, strong analytical and communication abilities.
CFD, 1D thermal-fluid models
4w
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Lead System/Test Validation Engineer
Austin or Secaucus
$144k-$246k/yr OnsiteFull Time
AMD
AMDNASDAQ: AMD: Designs and manufactures computer processors and graphics technology.
Technical leader for system and post-silicon debug of server CPUs and accelerators; expertise in OS/FW/HW/Silicon debug, system architecture, PCIe/CXL, X86/SoC, and cross-functional coordination. Bachelors or Masters in ECE/CompE preferred.
PCIe, CXL, X86, SoC, Operating System, Device Drivers, System BIOS
6d
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Senior Controls System Engineer
Long Island City, New York, United States
HybridFull Time
TEC Systems
TEC Systems: An engineering firm that delivers custom building automation solutions to optimize building performance, efficiency, and reliability.
7+ YOE7+ years leading complex HVAC/BAS controls design; strong MEP knowledge; DDC/BAS/BMS design experience; AutoCAD, Bluebeam, Microsoft Office skills; excellent communication and multitasking.
AutoCAD, Bluebeam, Microsoft Office Suite
1mo
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Lead Engineer
New York City or Los Angeles or Miami or London
$180k-$200k/yr HybridFull Time
Duetti
Duetti: Acquires and manages music catalogs for independent creators.
5+ YOE1+ Mgmt5+ years software engineering experience, 1+ year leading teams. Expert backend Python, API and distributed systems design, cloud native/AWS, Kubernetes, Docker, Terraform, CI/CD, production scalability, strong communication and leadership.
Python, AWS, Kubernetes, Docker, Terraform, CI/CD
2mo
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Lead Software Engineer - Platform Services
San Francisco or Palo Alto or Chicago or New York or Seattle or Indianapolis
$173k-$260k/yr HybridFull Time
Salesforce
SalesforceNYSE: CRM: Sells cloud-based customer relationship management and business software solutions.
8+ YOESenior software engineer with 8+ years of experience in distributed systems, cloud platforms, and microservices; strong architecture and leadership skills.
AWS, Node.js, TypeScript, GraphQL, REST, Terraform, DynamoDB, Neo4j, Kafka, Kinesis, JWT, OAuth 2.0, OpenID Connect, Jest, Playwright, AI coding assistants, CI/CD, Cloud-native, Git
1w
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Lead Engineer
New York, New York, United States
$200k-$270k/yr OnsiteFull Time
Artos
Artos: AI-powered regulatory document automation platform for life sciences.
6+ YOE6+ years software engineering with distributed systems experience, Go backend proficiency, Kubernetes/AWS/GCP/Redis/Temporal experience, mentorship and system ownership experience.
Go, Kubernetes, AWS, GCP, Redis, Temporal, Claude, Opus
2mo
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Lead Trading Systems Engineer (USA)
Stamford or New York City
$175k-$200k/yr HybridFull Time
Trexquant
Trexquant: Quantitative hedge fund developing systematic trading strategies.
6+ YOESenior engineer with 6+ years in high-performance Linux trading framework, expert in C++/Java/Python, low-latency systems, market microstructure, OMS, and cross-team collaboration.
C++, Java, Python, Linux, Algorithm Design, Concurrency, Distributed Systems
3mo
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Lead Software Engineer
Flower Mound or Rockleigh
$123k-$198k/yr HybridFull Time
Crestron
Crestron: Designs and manufactures advanced automation and control systems.
5+ YOE5-10 years professional software engineering; lead-level contributions; cross-functional Agile; Bachelor's preferred; .NET; system design; CI/CD; mentoring.
.NET, CI/CD, Git, APIs, DevOps
2mo
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Lead Manufacturing Engineer – Space Ignition Systems
Norwich, Connecticut, United States
$87k-$116k/yr OnsiteFull Time
GE Aerospace
GE AerospaceNYSE: GE: Designs and manufactures jet engines and aerospace systems.
3+ YOEBachelor’s degree in electrical/mechanical/electromechanical engineering and 3+ years in engineering/manufacturing; strong problem-solving and cross-functional collaboration.
5d
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AI Support Engineer Lead
Paris or San Francisco or New York City
€100k-€160k/yr OnsiteFull Time
Dust
Dust: Platform to build and deploy custom enterprise AI agents.
Build and run AI-powered support systems, lead and grow a support engineering function, investigate complex issues, and translate customer signal into product improvements.
Dust, Cursor, Claude Code, n8n, MacBook Pro, Linux
1w
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Tech Lead Engineer
United States or New York City
$180k-$195k/yr HybridFull Time
Zip
ZipASX: ZIP: Provides interest-free installment payment services for retail consumers.
12+ YOE3+ Mgmt12+ years backend engineering experience, 3+ years technical leadership, deep .NET/C# and Azure expertise, distributed systems and DDD/CQRS experience, Dynatrace familiarity, fintech/payments preferred.
.NET, C#, Azure Cloud Services, Domain-Driven Design (DDD), CQRS, Dynatrace, NetSuite
1mo
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Lead Unified Communications Engineer
Louisville or Atlanta or Boston or Charlotte or Chicago or Dallas or Fort Lauderdale or Nashville or New York or Tampa
$118k-$162k/yr OnsiteFull Time
Humana
HumanaNYSE: HUM: Provides health insurance plans and clinical healthcare services.
8+ YOE8+ years Unified Communications, 2+ years of project leadership, MS 365 admin, automation scripting (PowerShell, APIs), experience planning and implementing communications systems, willing to travel up to 10%.
Microsoft 365, PowerShell, APIs, SharePoint, Teams, Exchange Online, OneDrive
1mo
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Lead AI Engineer
O Fallon or Arlington or Purchase
$140k-$231k/yr OnsiteFull Time
Mastercard
MastercardNYSE: MA: Global payment processing and financial technology service provider.
Experience designing and deploying production-grade AI systems; lead multi-agent, tool-using architectures; strong cross-functional leadership; production observability and governance.
Copilot Studio, Azure AI Foundry, Salesforce Agentforce, Microsoft Power Platform
1mo
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Lead Software Engineer
New York, New York, United States
$120k-$222k/yr HybridFull Time
Publicis Groupe
Publicis GroupeEuronext Paris: PUB: Global communications, advertising, and digital transformation holding.
8+ YOEBachelor’s degree in CS/IT; 8+ years software engineering; distributed systems; REST APIs; JavaScript/TypeScript; AWS; DevOps; AI tools.
Node.js, TypeScript, JavaScript, Express.js, NestJS, Fastify, Kafka, RabbitMQ, SNS/SQS, PostgreSQL, SQL Server, Aurora, DynamoDB, MongoDB, Redis, AWS, Azure, GCP, Terraform, Ansible, CI/CD, Cursor, Claude Code
20h
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Associate Engineer A - CENG, Steam Generation Project Instrumentation and Control System Engineering
New York City, New York, United States
$85k-$115k/yr OnsiteFull Time
Consolidated Edison
Consolidated EdisonNYSE: ED: Provides electric, gas, and steam services in New York.
2+ YOEBachelor's in engineering or applied science and minimum 2 years relevant experience including 1 year in power systems; strong communication, engineering software proficiency, ability to lead initiatives, and driver's license required.
1mo
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Lead Software Engineer
New York, New York, United States
$120k-$222k/yr OnsiteFull Time
Publicis Groupe
Publicis GroupeEuronext Paris: PUB: Global advertising and digital transformation agency holding.
8+ YOE8+ years in software engineering; distributed systems; cloud-native on AWS; Node.js/TypeScript; REST/microservices; SQL/NoSQL databases; DevOps and IaC; AI-assisted coding tools.
Node.js, TypeScript, JavaScript, Express.js, AWS, Kafka, RabbitMQ, PostgreSQL, SQL Server, Aurora, DynamoDB, MongoDB, Redis, React, Next.js, NestJS, Fastify, Terraform, Ansible
1mo
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Lead AI Engineer
Minneapolis or Chicago or New York City
$125k-$175k/yr OnsiteFull Time
Ovative Group
Ovative Group: Digital media, marketing measurement, and creative services provider.
8+ YOE8+ years in software/platform engineering with experience delivering AI-powered workflow systems, Python and SQL proficiency, cloud (AWS/GCP/Azure), Databricks preferred, MCP/agent orchestration, LLM production experience, security and governance expertise.
Python, SQL, Databricks, AWS, GCP, Azure, EMRge, Model Context Protocol (MCP), Claude Enterprise, Anthropic API, CI/CD
1mo
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Lead Mechanical Engineer (Mission Critical/Data Centers)
New York, New York, United States
$165k-$182k/yr OnsiteFull Time
WSP
WSPToronto Stock Exchange: WSP: Provides engineering, design, and environmental consultancy services globally.
7+ YOE7+ years designing mechanical systems for high-performance, commercial, industrial or mission-critical/data center buildings; mentoring; strong communication; travel flexibility.
HVAC, Building Automation, CFD, Chilled Water, Hydronic Systems, Energy Modeling
3w
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Lead QA Engineer (AI & Agentic Systems)
New York City, New York, United States
$160k-$300k/yr OnsiteFull Time
Solstice Health
Solstice Health: AI-powered platform accelerating content creation for life sciences marketing.
Senior, hands-on QA engineer with strong Python, Playwright, CI/CD and test-infrastructure experience; experience testing ML/LLM/agentic systems, building evaluation systems, manual exploratory testing, and clear communication.
Python, Playwright, CI/CD, TypeScript, React, LangChain, LangGraph, LangSmith, Langfuse, Arize Phoenix, Braintrust, RAGAS, Promptfoo, OpenAI Evals, LLM