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89 performance test engineer jobs at 63 companies in Fairfield, CT

5d
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Information Technology Specialist (Performance Test Engineer)
Fresno or Washington or Jacksonville or Chamblee or Chamblee or Fairview Heights or Covington or Lanham or Detroit or Kansas City or Saint Louis or Holtsville or Philadelphia or Guaynabo or San Juan or Memphis or Austin or Austin or Farmers Branch or Ogden or Kearneysville
$126k-$193k/yr OnsiteFull Time
IRS Office of Chief Counsel
IRS Office of Chief Counsel: Represents the IRS in tax litigation and legal matters.
1+ YOELead design and execution of performance/load/stress tests, integrate performance testing into CI/CD, develop scripts with LoadRunner and JMeter, proficiency in Java, Python, C, and cloud platforms (AWS, Azure). U.S. citizenship required.
GitHub, Amazon Web Services (AWS), Azure, LoadRunner, JMeter, Java, Python, C, AppDynamics, Splunk
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3mo
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Performance Engineer
Stamford, Connecticut, United States
OnsiteFull Time
Altus Power
Altus Power: Developer and operator of commercial-scale solar energy infrastructure.
3+ YOEBachelor’s in engineering, math, or physics; 3-4 years in production analytics, performance testing, and asset assessments; strong data analysis, independent work, and cross-functional collaboration.
DAS software, Data analytics tools
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3mo
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Development Test Engineer II
Brooklyn, New York, United States
$95k-$105k/yr OnsiteFull Time
Mini-Circuits
Mini-Circuits: Designs and manufactures radio frequency and microwave components.
2+ YOEPerform electrical tests of RF components, verify data, and prepare test reports. BS Electrical Engineering with 2+ years of experience; knowledge of testing procedures; read technical drawings; operate RF test equipment.
Network Analyzer, Spectrum Analyzer, Power meter, Power supply, Oscilloscope, Noise Figure Analyzer, Signal Generator
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5h
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Test Engineer (White Plains, US)
White Plains, New York, United States
$118k-$163k/yr OnsiteFull Time
New York Power Authority
New York Power Authority: State-owned electric utility providing public power to New York.
5+ YOEExperience developing and executing manual and automated tests, test strategies, UFT/Coded-UI/Tricentis Tosca, API and performance testing, defect tracking, and cross-team collaboration; utilities experience preferred.
Tricentis Tosca, Unified Functional Testing (UFT), Coded-UI, Sitecore, Azure Devops, Primavera
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2w
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Director Software Development Engineer in Test
Princeton or New York City
OnsiteFull Time
S&P Global
S&P GlobalNYSE: SPGI: Provides independent credit ratings, market benchmarks, and financial analytics.
15+ YOE5+ Mgmt15+ years SDET experience with 5+ years in senior leadership; executive presence; strategic leadership across automation, performance, security, AI/ML, usability, and accessibility; hands-on with Java, Python, JavaScript/TypeScript, SQL; experience with cloud, automation frameworks, observability, and CI/CD.
Java, Python, JavaScript, TypeScript, SQL, Azure, AI/ML, CI/CD
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3w
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Performance Marketing Lead
New York City, New York, United States
HybridFull Time
Trove
Trove: Digital collectibles marketplace for buying and redeeming trading cards.
7+ YOE7+ years performance user acquisition for B2C, deep Meta/Google/TikTok experience, SQL proficiency, strong analytics, CAC/ROAS/LTV ownership, creative partnership, building testing engines.
Meta, Google, TikTok, SQL
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2mo
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Software Development Engineer in Test (SDET)
New York City, New York, United States
$90k-$120k/yr OnsiteFull Time
MetTel
MetTel: Providing managed network, mobility, and cloud communications for enterprises.
5+ YOE5 years QA experience in Agile; Bachelor's in IS/CS/CE or related field; strong QA testing, automation (Selenium), and API/performance testing; programming knowledge; CI/CD familiarity; good communication.
Selenium, CI/CD, TeamCity, Jenkins, Git, .NET, React, Spring, Angular, Django
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2w
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Director Software Development Engineer in Test
Princeton or New York
OnsiteFull Time
S&P Global
S&P GlobalNYSE: SPGI: Provides financial data, analytics, and credit ratings worldwide.
15+ YOE5+ Mgmt15+ years SDET experience with 5+ years in senior leadership; strategic leadership in quality engineering, automation, performance, security, AI/ML, and strong executive communication.
Java, Python, JavaScript, TypeScript, SQL, CI/CD, Azure, AI/ML
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1mo
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Senior Quality Engineer, Performance and Analytics
New York City or Reno or San Ramon
$114k-$142k/yr HybridFull Time
Ridgeline
Ridgeline: Cloud-native platform for investment management operations.
5+ YOE5+ years in quality engineering for SaaS; experience validating performance analytics (TWR, Brinson, P&L), APIs, databases, cloud platforms, automated testing, and collaborating with product and engineering teams. Must be U.S. work authorized.
Claude Code, Cursor, GitHub Copilot, ChatGPT, SQL, OLAP, Columnar, AWS, Azure, Google Cloud, APIs, databases, ETL
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1mo
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Electronic Test Technician
Flushing or Mentor or Mayfield or Willoughby or Amery
$20-$25/hr OnsiteFull Time
Process Technology
Process Technology: Designs and manufactures industrial heating and power conversion equipment.
2+ YOE2+ years hands-on electronic test experience (Electrical Engineer preferred), proficiency with oscilloscopes, spectrum analyzers, and signal generators; ability to read schematics and perform troubleshooting and failure/root cause analysis.
oscilloscopes, spectrum analyzers, signal generators
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1w
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Principal Engineer
New York City, New York, United States
$208k-$228k/yr HybridFull Time
Fanatics
Fanatics: Global digital sports platform for merchandise, collectibles, and betting.
7+ YOEBachelor's in CS or related plus 7+ years engineering experience; 5+ years building Android/Kotlin apps, UI, modular architectures, testing frameworks, and performance optimization; 3+ years CI pipeline experience with Gradle, Jenkins, or GitHub Actions.
Kotlin Multiplatform (KMP), Jetpack Compose, Compose Multiplatform, Kotlin, Android, Gradle, Jenkins, GitHub Actions
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5d
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Mechanical Engineer III - Analytical Focus
Chester, Connecticut, United States
OnsiteFull Time
Whelen Engineering
Whelen Engineering: Manufacturer of emergency warning and public safety lighting.
5+ YOEPerform structural and thermal analysis using FEA and classical methods; 5+ years engineering experience; BS or MS in Mechanical Engineering; SolidWorks, CFD, Matlab/Python proficiency; test-model correlation and materials knowledge.
FEA, Solidworks Simulation, Solidworks Flow Simulation (CFD), FEM, Matlab, Python, SolidWorks, AutoCAD, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, PDM, PLM
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3mo
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Engineer, Electrical
Melville, New York, United States
$90k-$95k/yr OnsiteFull Time
Leviton
Leviton: Manufactures electrical wiring devices and networking infrastructure for buildings.
2+ YOEDesign, develop, and test electrical components and systems; implement analog/digital designs; perform EMC/UL/FCC testing; 2-5 years experience; IoT, PCB and firmware exposure.
PCB design, Schematic capture, C programming, EMC testing, Firmware development
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2mo
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Senior Software Engineer, Infrastructure, High Performance Networking
New York or Sunnyvale
$174k-$252k/yr OnsiteFull Time
Google
GoogleNASDAQ: GOOGL: Provides online search, advertising, cloud computing, and consumer electronics.
5+ YOEBachelor's degree or equivalent; 5+ years software development; 3+ years testing/launching software; 3+ years infrastructure/distributed systems experience.
C++, C, Python, MPI, libfabric, NCCL, UCX, Linux
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3d
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Physical Security Engineer, R&D
Austin or New York City or San Francisco or Seattle
$229k-$271k/yr OnsiteFull Time
Fluidstack
Fluidstack: Provides high-performance cloud GPU infrastructure for AI development.
Design and engineer physical security systems (access control, video, intrusion, perimeter); produce drawings, device schedules and specs; configure access control and VMS; perform site surveys, punch walks, and acceptance testing.
Lenel, Genetec, CAD, Revit
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2w
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Testing and Automation Engineer
Shelton, Connecticut, United States
$103k-$128k/yr OnsiteFull Time
Subway
Subway: Operates a global chain of quick-service sandwich restaurants.
3+ YOE3+ years testing/quality engineering experience; proficiency in test automation (UI/API/backend), performance testing, AI-assisted testing, CI/CD, and basic scripting in Java/JavaScript/Python/C#.
JMeter, Gatling, k6, Locust, Selenium, Cypress, Playwright, REST-assured, Postman, Java, JavaScript, Python, C#, CI/CD
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3mo
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Infrastructure Engineer
New York City, New York, United States
OnsiteFull Time
Eisen
Eisen: Compliance operations infrastructure for financial institutions and fintechs.
5+ YOE5+ years of infrastructure/DevOps/platform engineering experience; strong CI/CD with GitHub Actions; JavaScript/TypeScript; knowledge of performance testing; fintech/regulatory experience.
GitHub Actions, Jest, Cypress, Playwright, k6, Artillery, Locust, MongoDB, Kafka, Redis, Snowflake
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1mo
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Senior/Staff Software Engineer, Developer Experience
London or Toronto or San Francisco or New York City or Montreal or Paris or Seoul or Germany or Canada or United States
RemoteFull Time
Cohere
Cohere: Provides enterprise-grade large language models and AI software platforms.
5+ YOE5+ years software engineering with automation/testing infra focus; expert Python and TypeScript; GitHub Actions/workflows; CI/CD, Docker, Kubernetes; cloud (AWS/GCP/Azure); benchmarking and performance testing experience.
Python, TypeScript, GitHub workflows, GitHub Actions, Helm charts, ArgoCD, Docker, Kubernetes, Terraform, Pulumi, AWS, GCP, Azure
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4d
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Senior Software Engineer I
New York or Aventura
OnsiteFull Time
Compass
CompassNYSE: COMP: Technology-enabled residential real estate brokerage and agent software platform.
5+ YOE5+ years software engineering with frontend emphasis using TypeScript and React; expertise in frontend architecture, state management, migrations, web performance, accessibility, gRPC integrations, testing and CI/CD.
TypeScript, React, gRPC, Go, Node.js, Jest, Cypress, React Testing Library, Webpack, Vite, Git, ClaudeCode, CLAUDE.md
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3w
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Senior Engineer II
New York, New York, United States
$244k-$303k/yr HybridFull Time
CoreWeave
CoreWeaveNASDAQ: CRWV: Cloud platform providing GPU-accelerated infrastructure for AI workloads.
8+ YOEBachelor's in CS/related and 8+ years software engineering; 7+ years writing unit/integration/end-to-end tests; 5+ years with Python or Go; experience with gRPC, Protocol Buffers, and Kubernetes; mentoring and designing high-performance APIs.
Python, Go, gRPC, Protocol Buffers, Kubernetes
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