4,802 Results for

Performance Engineer Jobs in Seattle, WA

Jobs

New!

Redmond, WA2 days ago

$119,800–$234,700 Per Year

We own inference performance of OpenAI and other state of the art large language model (LLM) models and work directly with OpenAI on the models hosted on the Azure OpenAI service serving some of the largest workloads on the planet with trillions of inferences per day in major Microsoft products, including Office, Windows, Bing, SQL Server, and Dynamics.

Masters Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C++, or Python
- OR Bachelors Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C++, or Python.

Bellevue, WA14 days ago

$28–$30 Per Hour
Full-time

validation, log analysis, and troubleshooting across terrestrial and satellite (LEO/GEO, Direct-to-Device) networks in collaboration with R&D, QA, and carrier teams. Bachelor’s degree in Telecommunications, Electrical Engineering, Computer Science, or equivalent experience.

New!

Redmond, WA4 days ago

$100,000–$115,000 Per Year

Responsibilities include maintaining and administering all aspects of the company’s computer networks, including network hardware & software, assisting with disaster recovery design, planning and implementation, securing and protecting all data in motion, configuring, monitoring and maintaining firewalls, and replacing faulty network hardware components when necessary. ESSENTIAL FUNCTIONS: The essential function of the Network Engineer includes but is not limited to:

Maintaining and administering the company’s computer networks and related network environments including systems software, applications software, hardware, wireless, and configurations.

Seattle, WA9 days ago

Remote

$90,000–$120,000 Per Hour

The right candidate will work closely with engineering, project management, and field teams to turn mechanical and electrical system designs into fully operational BAS and controls platforms that optimize building performance, reliability, and efficiency. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.

Seattle, WA9 days ago

$126,000–$250,000 Per Year

FPGA Integration (Optional): Experience interfacing with or developing alongside FPGAs, including familiarity with common communication interfaces (AXI, PCIe, custom parallel buses),register-mapped peripheral access from embedded Linux or bare-metal environments, and collaborative bring-up with digital design engineers. Excellent Communication Skills: Effectively convey ideas and communicate technical topics with engineering, build staff, and operations; run self-directed design reviews and participate in reviews of parallel systems.

Seattle, WA9 days ago

$126,000–$250,000 Per Year

This role requires deep technical credibility — you will be working peer-to-peer with experienced firmware engineers —combined with the communication skills to guide less-experienced teams to successful outcomes. Excellent Communication Skills: Effectively convey ideas and communicate technical topics with engineering, build staff, and operations; run self-directed design reviews and participate in reviews of parallel systems.

New!

Seattle, WA2 days ago

Remote

$170,000–$270,000 Per Year

The ideal candidate will be mid-level backend .Net Software Engineer with recent experience within a small, fast-paced, API-focused AI infrastructure startup company with lean, highly collaborative engineering teams, where they have operated with significant ownership, autonomy, and a strong “go-getter” mentality. Information collected and processed as part of your Jobot candidate profile, and any job applications, resumes, or other information you choose to submit is subject to Jobot's Privacy Policy, as well as the Jobot California Worker Privacy Notice and Jobot Notice Regarding Automated Employment Decision Tools which are available at jobot.com/legal.

Renton, Rhode Island30+ days ago

Contractor

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Implement, administer, and optimize Microsoft 365 services including Exchange Online, SharePoint, OneDrive, Teams, and Power Platform. In this role, you’ll be the go-to expert for our Microsoft collaboration and identity platforms, keeping systems running, secure, and aligned with business needs.

Renton, Rhode Island8 days ago

Contractor

ul>

Seattle, WA15 days ago

$85–$95 Per Hour
Full-time

Desired for Cross-Training Opportunities: Aerospace engineering experience in Flight Sciences, including experience in aerodynamic testing and/or design; flight testing of aircraft performance and handling characteristics, including experience with take-off; landing; climb and route performance; static-source error corrections and stall speed testing; longitudinal & lateral/directional stability and control; minimum control speeds; stall characteristics; high speed characteristics, crosswind takeoff/landing and flight into known icing. The primary role in this position is as a Flight Test Engineer who is responsible for coordinating test and certification requirements, authoring and executing flight and ground test plans for a wide variety of aircraft platforms including FAA Part 23, 25, 27 and 29 as well as new and novel technology demonstrator programs such as electric and hydrogen propulsion.

Seattle,, Washington30+ days ago

Remote

$80–$85 Per Hour
Contractor

li class="MsoNoSpacing" style="margin:0in">Critical objectives within the team are related to each and every service: high uptime/zero downtime (availability), efficiently scaled (up to 1000 requests per second) and performance (sub-second latency) for our customers. Job Description:

The MLPT Polymer group supports a range of Machine Learning platform products including: Bolt, Hub, Lightning and many Data Platform systems.

Kent, WA30+ days ago

p>More information about the overall organization can be found at www.heicocompanies.com. Historically talented at restoring distressed companies, Heico strategically targets acquisitions that will complement its ever-growing portfolio of companies in manufacturing, construction, and industrial services.

Redmond, WA23 days ago

$80–$120 Per Hour
Contractor

Collaborate closely with cross-functional teams and vendors to ensure RF performance are met at component, board and system level. US Tech Solutions is a global staff augmentation firm providing a wide range of talent on-demand and total workforce solutions.

Bellevue, WA7 days ago

Remote

$54–$90 Per Hour

p>The selected candidate will collaborate with project managers, design engineers, analysts, test engineers, supply chain teams, and other engineering disciplines to support the successful development and deployment of advanced reactor technology.

The successful candidate will demonstrate strong technical leadership, engineering excellence, attention to detail, and the ability to thrive in a fast-paced, collaborative engineering environment.

Redmond, WA27 days ago

$60–$120 Per Hour
Contractor
Full-time

The successful candidate will possess experience with a wide variety of manufacturing processes, be comfortable driving a team of engineers to rapidly develop and scale Client manufacturing processes and have the ability to work with a team of researchers with tolerance for a high degree of ambiguity. Experience with mass production of systems requiring multiple manufacturing processes such as: miniature motorized mechanisms; soft goods cutting, laminating, and kitting; active optical alignment, casting, molding, machining, electronics packaging, coatings, additive manufacturing.

New!

Redmond, WA2 days ago

$119,800–$234,700 Per Year

li>Partner across qubit design, electrical engineering, mechanical engineering, systems engineering, reliability, sourcing, supply chain, fabrication partners, contract manufacturers, system integrators, and leadership teams to align deliverables, resolve blockers, and support high-quality execution.

We are seeking a Senior Electrical Engineering - Engineering Planning Coordinator with an electrical engineering background to lead complex printed circuit board (PCB) supplier engagements, drive process development, coordinate multidisciplinary hardware teams, and oversee program schedules, budgets, and resource planning.

New!

Redmond, WA2 days ago

$142,800–$274,800 Per Year

p>This role sits at the intersection of cloud infrastructure, systems software, virtualization, and container platforms, working closely with CoreAI, Azure Infrastructure, OS, Networking, and Hardware teams to deliver end-to-end platform capabilities.

Build and operate advanced orchestration and resource governance scenarios using platforms such as AKS, Dynamic Resource Allocation (DRA), and related Kubernetes ecosystem capabilities to enable fair sharing, isolation, and efficient utilization of accelerated resources.

New!

Seattle, WA6 days ago

$77,000–$82,000 Per Year

div>

Master required job-specific and technical skills in order to promote to an assistant superintendent or assistant project manager following the 12-month training program including, but not limited to, the ability to:

Set up and maintain jobsite office and all jobsite records, including project directory, construction documents, subcontractor directory, daily reports, submittal logs, RFI logs, subcontractor correspondence, etc.

Ability to learn sector- and project-specific software systems, including but not limited to: Microsoft Office 365 (Project, Excel, Word, Outlook, PowerPoint, etc.), ProCore, Adobe Suite, BlueBeam, and JD Edwards software suite .

Bellevue, WA7 days ago

Remote

$52–$85 Per Hour

System One, and its subsidiaries including Joulé, ALTA IT Services, and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America.

This role may require sitting or standing for extended periods, with tasks including bending, grasping, and fine motor control.

Bellevue, WA7 days ago

$52–$85 Per Hour

li>Interface with cross-functional design disciplines (mechanical, instrumentation & controls, civil, nuclear) to develop plant design information and define system design/performance criteria.

Physical requirements include sitting and/or standing for extended periods, bending/stooping, grasping/gripping, fine motor control, with minimal physical exertion, including the ability to safely lift up to 25 pounds.

New!

Redmond, WA2 days ago

$139,900–$274,800 Per Year

There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $188,000 - $304,200 per year. Your role will be to help the team define the right investments to make, build the features with high quality, maintainable solutions, and mentor the teams of engineers to accelerate their career paths, and deliver on the features we have promised customers on time.

New!

Redmond, WA2 days ago

$139,900–$274,800 Per Year

Bachelors Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, Go, or Python
- OR equivalent experience.

New!

Redmond, WA2 days ago

$119,800–$234,700 Per Year

p>· Master’s Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelor’s Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $158,400 - $258,000 per year.

New!

Redmond, WA2 days ago

$119,800–$234,700 Per Year

Bachelors Degree in Computer Science or related technical field AND 4+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python
- OR equivalent experience .

New!

Redmond, WA2 days ago

Within CoreAI, the Foundry Agents organization is responsible for key ownership areas across the end‑to‑end agent lifecycle: (a) Foundry Agents platform to deploy and run agents securely at enterprise scale with seamless integration with governed tools, (b) model fine‑tuning to train and improve agentic performance, and (c) Foundry observability to generate insights from agentic traces and continuously evaluate and optimize agents.

As a Software Engineer II within Foundry Agents, you will contribute to building large‑scale, cloud‑native systems that support the full lifecycle of advanced agentic applications — from secure enterprise deployment and tool integration, to fine‑tuning workflows, to observability and evaluation in production.

New!

Tacoma, WA2 days ago

li>Strong hands-on expertise applying agentic and AI‑driven frameworks to elevate engineering productivity, optimize performance, and strengthen system reliability including building Agents, Sub-agents, MCP Servers, Skills etc.,

Strong hands-on experience with performance engineering in large scale pipelines and active participation in resolving production incidents .

Here, how we empower our people is extraordinary: Glassdoor Best Places to Work 2025, Great Place to Work-Certified in five countries, and Cigna Healthy Workforce honors three years running — and what we build is world-class: recognized as CybersecAsia’s Best in Critical Infrastructure 2024 — evidence that when first-class technology meets empowered talent, remarkable careers take shape.

New!

Redmond, WA2 days ago

$100,600–$199,000 Per Year

Bachelors Degree in Computer Science or related technical field AND 2+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python .

New!

Redmond, WA2 days ago

$119,800–$234,700 Per Year

p>Masters Degree in Computer Science, Math, Software Engineering, Computer Engineering, or related field AND 3+ years experience in business analytics, data science, software development, data modeling, or data engineering OR Bachelors Degree in Computer Science, Math, Software Engineering, Computer Engineering, or related field AND 4+ years experience in business analytics, data science, software development, data modeling, or data engineering OR equivalent experience. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $158,400 - $258,000 per year.

Bellevue, WA11 days ago

$37–$74 Per Hour

The engineer also builds automated, repeatable workflows, documents methodologies and assumptions, collaborates across disciplines to align methods with design and safety analysis, and follows SQA/NQA-1 practices to ensure traceability, configuration control, and reproducibility. Responsibilities include running steady-state and transient analyses to assess model performance and fidelity needs, integrating closure models and empirical correlations into existing frameworks, and identifying gaps through sensitivity studies to drive method improvements.

Bellevue, WA14 days ago

Remote

$37–$74 Per Hour

p>Working as part of a multidisciplinary engineering team, you'll collaborate with safety, instrumentation & controls (I&C), and system design engineers to model, analyze, and validate complex plant systems.

System One is seeking a highly motivated Plant Integrated Analysis Engineer to support the development of advanced sodium-cooled nuclear reactor technology.

New!

Bellevue, WAToday

Remote

$72–$90 Per Hour

You will work on developing and assessing benchmark models, ensuring compliance with NRC guidance (RG 1.203), and supporting safety methodology development for next-generation nuclear systems, including Sodium Fast Reactors (SFR). Qualifications & Skills:

Extensive experience with nuclear safety software verification, validation, and system transient analysis codes (RELAP5-3D, TRACE, MELCOR, SAS4A/SASSYS-1, SAM, or similar).

Bellevue, WA11 days ago

Remote

$69–$115 Per Hour

li>Perform technical reviews of work products, including seismic analysis, soil-structure interaction (SSI) analysis, and probabilistic assessments. System One, and its subsidiaries including Joulé, ALTA IT Services, and Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America.

Bellevue, WA14 days ago

Remote

li>Experience developing and maintaining mass and energy balance models using Aspen HYSYS and/or Aspen Plus.

System One is seeking an experienced System Design Engineer to support the development of advanced nuclear energy systems.

Bellevue, WA7 days ago

Remote

$69–$115 Per Hour

The Supplier Project Engineer will provide oversight of supplier activities throughout the project lifecycle, ensuring contract requirements, technical expectations, schedules, and deliverables are successfully achieved.

• Demonstrated experience supporting supplier relationships in engineering, manufacturing, or highly regulated industries.

New!

Bellevue, WAToday

$56–$95 Per Hour

System One is seeking a Senior Welding Engineer for a yearlong contract role to work as part of a high-functioning team of engineers focused on materials processing, supply chain development and supplier qualification for next generation material and components for sodium-cooled fast reactors.

Oversee test programs for qualification of welds, including mechanical properties, burst testing, thermal creep, creep-fatigue, neutron irradiation, thermal aging, and sodium exposure .

Seattle, WA11 days ago

Remote

$55–$75 Per Hour

This position will play a key role in managing multi-discipline engineering efforts, supporting EPCm-style projects, and ensuring successful project execution across safety, quality, cost, and schedule. This role is ideal for a hands-on engineering professional who is experienced across the full project lifecycle—from concept and pre-FEED through commissioning and startup.

Bellevue, WA11 days ago

$63–$80 Per Hour

p>System One is seeking a highly motivated Weld Engineer to support a Materials Development & Qualification team advancing next-generation materials and components for sodium-cooled fast reactors. This is a hands-on, high-impact role where your weld engineering and metallurgy expertise will influence how advanced components are designed, tested, qualified, and transitioned into supplier-ready manufacturing processes.

Bellevue, WA11 days ago

Remote

$69–$115 Per Hour

ul>

Perform detailed design, analysis, and documentation for ASME Section III Class HB and/or Section VIII division 2 vessels, including nozzles, flanges, support brackets, and other support elements used in nuclear facilities.

Minimum of six years of equipment / component design experience for level 10 or minimum of ten years of equipment / component design experience for level 11; relevant M.S. degree credited as two years of experience.

New!

Redmond, WA2 days ago

$139,900–$274,800 Per Year

ul>

Master’s Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelor’s Degree in Computer Science or related technical field AND 12+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.

Lead cross-team collaboration to identify dependencies, negotiate delivery schedules, drive alignment across partner teams, and ensure proper end-to-end testing, live-site coverage, scalability and performance before going live.

New!

Bellevue, WA5 days ago

Remote

$69–$115 Per Hour

pre>Job Title: Plant Radiological Integration Engineer Location: Bellevue, WA Type: Contract Compensation: $69.00 – $115.00 Work Model: Remote – offsite Hours: 40.0System One is hiring a Plant Radiological Integration Engineer to provide the following services that will focus on Nuclear Island System, Structure and Component (SSC) design integration with plant radiological design, analysis, and shielding requirements. The Plant Radiological Integration Engineer will work as part of a high-performing team of engineers and scientists.Responsibilities

Coordinate between design teams working on plant source term and radiological release analysis, risk analysis, plant operations and SSC radiological shielding design teams.

Bellevue, WA13 days ago

Remote

$69–$115 Per Hour

Other engineering activities include, but are not limited to, performing accident analyses, contributing to software qualification, participating in hazard analysis, participating in Structures, Systems and Components (SSC) classification, as well as performing verification and validation activities.

Familiarity with nuclear design, regulatory requirements, and risk-informed performance-based technology guidance for Non-Light Water Reactors under Regulatory Guide (RG) 1.233 is strongly preferred.

New!

Seattle, WA2 days ago

$205,000–$281,000 Per Year

p>In this role, you’ll work side-by-side with backend software engineers, data scientists, ML engineers, product managers, and partner engineering and operations teams to turn prototypes and ideas into robust, scalable, and observable production systems.

We’re looking for a senior-level Software Engineer to join our Pricing & ML team, leading the design and evolution of the platform and tooling that productionize the machine learning models behind our pricing engine.

New!

Redmond, WA2 days ago

$100,600–$199,000 Per Year

li>Masters Degree in Computer Science or related technical field AND 3+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelors Degree in Computer Science or related technical field AND 5+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience. If you love solving challenging problems, developing scripts and/or automation to solve said problems, and are passionate about operating and automating robust, reliable, highly distributed software systems using the latest cutting-edge technologies, then let’s talk.     .

New!

Redmond, WA2 days ago

Our converged AI fabric delivers inference capabilities for all LLMs in Microsoft catalog, including OpenAI, Anthropic, Mistral, Cohere, Llama, and more. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $188,000 - $304,200 per year.

New!

Redmond, WA2 days ago

$119,800–$234,700 Per Year

ul>

Masters Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C#, Java, JavaScript, or Python

OR Bachelors Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C#, Java, JavaScript, or Python. In our team, you’ll work on cutting-edge products for Ad Quality and Publishers monetization, focusing on enhancing user experience, building scalable reporting solutions for publishers, working with distributed systems, and delivering top-quality ads.

New!

Redmond, WA2 days ago

p>• Build agentic AI workflows using Azure AI Foundry Agent Service and Microsoft Agent Framework, including multi-agent coordination, tool integrations, and agent lifecycle management. We are seeking an Applied AI II Engineer to join the team and help build the next generation of agentic AI services that resolve customer issues faster, reduce support volume, and power AI-first support at Azure scale.

New!

Redmond, WA2 days ago

$119,800–$234,700 Per Year

p>Preferred Qualifications:

Masters Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelors Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.
- Bachelors Degree in Computer Science or related technical field AND 4+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.

New!

Redmond, WA2 days ago

$119,800–$234,700 Per Year

New!

Redmond, WA2 days ago

$119,800–$234,700 Per Year

CoreAI – Platform and Tools is Microsoft’s AI‑first engineering organization, created to build the end‑to‑end Copilot & AI stack powering products like GitHub Copilot and Visual Studio Code.

New!

Redmond, WA2 days ago

$139,900–$274,800 Per Year

Bachelors Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python
- OR equivalent experience.

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Performance Engineer Jobs in Seattle, WA

Senior Software Engineer - Performance Tooling Microsoft

Wireless Network Engineer BTI Solutions

Network Engineer Jobot

Applications Engineer / BAS Programmer Jobot

Embedded Solutions Engineer – Space Systems Jobot

Senior Embedded Engineer - End Devices Jobot

Sr. AI Software Engineer (C#/.Net, infrastructure & startup exp. req'd) - 100% REMOTE Jobot

M365 ENGINEER (RENTON, WA) Widenet Consulting

M365 ENGINEER (BOSTON, MA) Widenet Consulting

Flight Test Engineer 804 Technology

DevOps Engineer III Pinnacle Technical Resources

Electrical Engineer Davis Wire Corporation

RF Research Engineer- #26-13412 US Tech Solution

CRD System Design Engineer (Mechanical) System One

Process Engineer V # 26-12762 US Tech Solutions

Senior Electrical Engineer - Planning & Coordination Microsoft

Principal Software Engineer, CoreAI Microsoft

Commercial Construction Project Engineer HITT Contracting

Component Engineer, Nuclear System One

Fuel Handling Design Engineer System One

Principal Software Engineer Microsoft

Principal Software Engineer - Responsible AI (CoreAI) Microsoft

Principal/Senior Software Engineer, Experimentation Platform - CoreAI Microsoft

Senior Software Engineer - CoreAI Microsoft

Software Engineer II, Foundry Agents - CoreAI Microsoft

Senior Software Engineer Infoblox

Software Engineer II - CoreAI Microsoft

Senior Data Engineer - AI Infrastructure Microsoft

Senior Safety Methods Engineer System One

Plant Integrated Analysis Engineer System One

Senior Safety Verification and Validation Engineer System One

Principal Engineer, Seismic CSA Integration and Oversight System One

System Design Engineer System One

Supplier Project Engineer, Supply Chain System One

Senior Welding Engineer System One

Senior Mechanical Engineer - Remote System One

Weld Engineer System One

Senior Mechanical Engineer (Vessels) System One

Principal Software Engineer, Experimentation Platform - CoreAI Microsoft

Plant Radiological Integration Engineer System One

Senior Nuclear Safety Analysis Engineer (Accident/Transient Methods) System One

Machine Learning Engineer- Platform Opendoor

Software Engineer II - CTJ - POLY Microsoft

Principal Software Engineer - CoreAI Model Inference & Serving Microsoft

Senior Software Engineer Microsoft

Applied AI Engineer II Microsoft

Senior Software Engineer - CTJ - Poly Microsoft

Senior Software Engineer - CoreAI Model Inference & Serving Microsoft

Senior/Principal Software Engineer - Growth (CoreAI) Microsoft

Principal Software Engineer - CoreAI Microsoft

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