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647 performance engineer jobs at 397 companies in Fairfield, CT

3mo
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Performance Engineer
New York City or New York or United States
HybridFull Time
PDT Partners
PDT Partners: Systematic hedge fund using quantitative models for global trading
5+ YOEStrong Linux performance engineering, PyTorch/GPU optimization, hardware-software understanding, and scalable system design experience.
Linux, PyTorch, CUDA, Python, GPU, CPU, OS, Networking, Storage
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2mo
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Performance Engineer, Inference Systems
San Francisco or New York City or Seattle
$350k-$850k/yr OnsiteFull Time
Anthropic
Anthropic: Developing safe and reliable artificial intelligence systems.
Hands-on performance engineering with Python, data analysis, and cross-layer investigations; strong communication of quantitative results.
Python, SQL, Pandas
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Lead Performance Web Engineer
New York or United States
HybridFull Time
Polymarket
Polymarket: A decentralized platform for trading on real-world event outcomes.
Proven web performance engineering at scale, technical leadership, proficiency in JavaScript/TypeScript, deep understanding of rendering, caching, CDN strategy, observability, and measurement-driven performance optimization.
JavaScript, TypeScript, Next.js, React, V8, Core Web Vitals
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1mo
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Manufacturing Performance Engineer
Somerset or Park Ridge
$100k-$110k/yr OnsiteFull Time
PIM Brands
PIM Brands: Manufactures and markets fruit snacks and confectionery products.
Bachelor's in engineering preferred; experience with Lean Six Sigma/TPM, continuous improvement, statistical analysis, Power BI/Tableau/SQL/SAP, and leading CI projects in a manufacturing environment.
Microsoft Excel, Pivot Tables, Tableau, Microsoft Power BI, SQL, SAP, DMAIC, PDCA, SMED, FMEA, A3, Value-stream mapping, Poka-yoke
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Electrical Performance Engineer
Lawrence or Boston or New York City or Chicago
$125k-$135k/yr HybridFull Time
Nexamp
Nexamp: Provides community solar and energy storage solutions.
5+ YOEBachelors in Electrical Engineering, 5+ years EE experience, 2+ years in solar/protection relays, PE preferred; strong root-cause analysis, communication, and data-driven reliability optimization skills.
inverters, transformers, protection systems, controls, balance-of-plant equipment, OCPDs, relays, breakers, reclosers, power logic controllers, inverter logs, relay events, EMS dispatch data, waveform captures, 8D
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Operations Performance Engineer
San Francisco or New York City or Denver or Austin or Calgary or Toronto
$189k-$202k/yr RemoteFull Time
Intersect
IntersectNASDAQ: GOOGL: Develops-located data centers and renewable energy infrastructure.
5+ YOEBachelor's in engineering,5–10 years supporting utility-scale solar/BESS or grid operations,ERCOT market and telemetry knowledge,SCADA/EMS experience,Power Factors experience,site visit capability.
Power Factors, SCADA, Energy Management Systems (EMS), OSIsoft PI, Tesla Megapack
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Senior Building Performance Engineer
Long Island City, New York, United States
$100k-$150k/yr HybridFull Time
Altanova
Altanova: Provides sustainability strategy and energy engineering services to organizations.
5+ YOE5+ years combined experience in building systems commissioning and energy modeling; bachelor\u0002s in mechanical engineering or building science; proficiency with whole-building energy modeling; PE NY preferred or ability to obtain; strong understanding of codes and standards.
DesignBuilder, OpenStudio, IES-VE, EnergyPlus, eQuest
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5d
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GPU Performance Engineer
New York City, New York, United States
$165k-$300k/yr HybridFull Time
Two Sigma
Two Sigma: Systematic investment management and quantitative trading firm.
1+ YOEExpert CUDA and GPU architecture knowledge, C++ and Python skills, BS/MS in STEM, minimum 1 year relevant experience, GPU profiling and optimization experience.
CUDA, Nsight Systems, Nsight Compute, RAPIDS, CUTLASS, cuBLAS, TensorRT, NCCL, MPI, cuDF, C++, Python
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3mo
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ChatGPT Performance Engineer
San Francisco or Seattle or New York City or United States
$325k-$405k/yr HybridFull Time
OpenAI
OpenAI: Develops artificial intelligence models and generative AI software services.
7+ YOE7+ years software engineering with focus on performance/reliability; strong profiling/tracing skills; experience across stack layers; OS internals knowledge; observability and benchmarking experience.
Profiling tools, Tracing systems, Python, Golang, GPU utilization, Observability tooling, Performance benchmarking tools
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Senior Performance Advertising Engineer
New York City or Redwood City
HybridFull Time
PubMatic
PubMaticNASDAQ: PUBM: Sell-side platform for digital advertising and programmatic media buying.
5+ YOE5+ years software engineering in performance advertising/programmatic bidding; expertise in attribution, MTA/LTA, low-latency pipelines, distributed data frameworks, and algorithmic ROAS optimization.
SKAdNetwork, Privacy Sandbox, RTB, OpenRTB, IDFA, GAID, App Transport Security, UID2, LiveRamp ATS, Apache Spark, Apache Flink, Kafka, Snowflake, BigQuery, Python, Go, Java, C++
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Engineer II, Performance (White Plains, NY, US, NY 10606)
White Plains or New York or United States
$105k-$140k/yr OnsiteFull Time
RWE
RWEXetra: RWE: Generates electricity through wind, solar, and conventional power plants.
1+ YOEBachelor's in Engineering, 1+ year M&V/energy analytics experience, familiarity with IPMVP/FEMP, EIT/CMVP/CEM credentials preferred, strong analytical, organizational and communication skills.
Microsoft Excel, eQuest, HAP, IPMVP, FEMP
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2mo
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Senior Building Performance Analyst
Boston or New York or Newark or Philadelphia or Alexandria or Atlanta or Miami
$70k-$140k/yr HybridFull Time
Vanderweil Engineers
Vanderweil Engineers: Provides engineering and design services for building infrastructure.
7+ YOE7-15 years building performance analysis/engineering; BS/MS in mechanical engineering, energy systems, or architectural engineering; experience with clients.
eQuest, IES, EnergyPlus, Energy calculations
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Inference Performance Engineer
New York, New York, United States
HybridFull Time
Material
Material: Specialized inference cloud platform for high-performance AI workloads.
BS in CS/EE or related field; proficiency in Rust/Go/Python/C++; knowledge of concurrency, tail latency; experience with model serving; GPU/ASIC programming; low-precision inference; profiling and benchmarking.
Rust, Go, Python, C++, vLLM, TensorRT-LLM, llama.cpp, CUDA, ROCm, Triton, TGI, SGLang, Nsight, perf
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1mo
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Performance & Capacity Engineering - Capacity Planning Optimization
Bellevue or Menlo Park or Boston or New York
$184k-$257k/yr OnsiteFull Time
Meta
MetaNASDAQ: META: Develops social networking platforms and virtual reality technologies.
8+ YOEBachelor's in CS/CE or equivalent; 8+ years experience in performance/software/optimization; expertise designing optimization models, LP solvers (Gurobi/Xpress), distributed systems, infrastructure operations, and coding (Python, R, Java, C/C++, PHP).
Python, R, Java, C, C++, PHP, Xpress, Gurobi
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Associate Engineer, Performance & Operational Engineering
Spring Valley, New York, United States
$80k-$110k/yr OnsiteFull Time
Consolidated Edison
Consolidated EdisonNYSE: ED: Provides electric, gas, and steam services in New York.
2+ YOEBachelor's in Engineering and 2 years' experience (1 year engineering); strong analytical, communication, and Microsoft Office skills; driver required; familiarity with regulations preferred.
Microsoft Word, Microsoft Excel, Microsoft Access, Microsoft PowerPoint, Microsoft Project
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1w
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Aerospace Engineer-Aircraft Performance (Direct Hire)
Lakewood or Denver or Washington or Orlando or Hapeville or Chicago or Wichita or Burlington or Kansas City or Greensboro or Westbury or Vandalia or Oklahoma City or Fort Worth or Des Moines
$95k-$148k/yr OnsiteFull Time
Federal Aviation Administration
Federal Aviation Administration: Regulates civil aviation and manages national air traffic systems.
1+ YOEBachelor's degree in engineering (ABET-accredited or equivalent) and at least one year of specialized experience addressing aircraft performance and handling qualities; transcripts required; U.S. citizenship required.
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3mo
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Senior Developer Technology Engineer, CPU Performance
Santa Clara or California or New York
$152k-$288k/yr HybridFull Time
NVIDIA
NVIDIANASDAQ: NVDA: Designs graphics processing units and artificial intelligence hardware.
5+ YOEMasters/PhD or equivalent experience, 5+ years relevant work or research, expert knowledge of CPU architectures and memory subsystems, low-level parallel programming, and fluency in modern C/C++.
C, C++, ARM, x86, Spark
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1mo
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Staff GenAI Engineer - Application Performance Monitoring (APM)
New York, New York, United States
$234k/yr HybridFull Time
Datadog
DatadogNASDAQ: DDOG: Observability and security platform for cloud applications and infrastructure.
10+ YOEBS/MS/PhD in scientific field or equivalent experience; 10+ years engineering experience; leadership in GenAI/ML initiatives; experience deploying/training/finetuning models.
Python, GenAI, ML, TensorFlow, PyTorch, Distributed Systems, Model Deployment, Data Analysis
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1mo
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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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Analyst, Performance
New York City, New York, United States
OnsiteFull Time
TerraForm Power
TerraForm Power: Owns and operates utility-scale wind and solar energy assets.
0+ YOEBachelor’s degree in Computer Science or related field; 0–2 years experience; Python and SQL; Databricks/Spark familiarity; data engineering and analytics.
Python, SQL, Databricks, Spark, Delta Lake, Streamlit, Power BI, Tableau
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