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Javascript Performance Engineer Jobs (NOW HIRING)

Jobgether

Web browser and web application performance, including JavaScript, web frameworks, tracing, and CSS ... engineering teams. How Jobgether works: We use an AI-powered matching process to ensure your ...

Exotec

Customer Performance Engineer

Atlanta, GA · On-site

As an Integrator Performance Engineer, you will be the technical owner of system performance ... Ability to read and understand code in C++, C, Python, JavaScript, and/or Java will be a plus ...

Exotec

Customer Performance Engineer

Atlanta, GA · On-site

As an Integrator Performance Engineer, you will be the technical owner of system performance ... Ability to read and understand code in C++, C, Python, JavaScript, and/or Java will be a plus ...

Apple

Sr. WebKit Performance Engineer

San Diego, CA · On-site

$148K/yr

The WebKit Performance team is looking for an engineer with a passion for software optimization to ... Experience with web technologies (HTML, CSS, JavaScript, SVG, WebGL, WebGPU). Experience with UIKit ...

Qualcomm

#Windows Performance Engineer, Senior

San Diego, CA · On-site

$148K/yr

As a Windows Performance Developer, you'll be owning and driving analysis of complex system level ... Familiarity with C#, Java, Javascript, Python is a plus * Strong familiarity with ARM architecture

ClifyX

Peformance Engineer

Phoenix, AZ · On-site

ClifyX is a company seeking a Performance Engineer to enhance their performance testing ... JavaScript for click and script protocol. • Experience with SQL language and ability to do ...

Apple

Sr. WebKit Performance Engineer

San Diego, CA · On-site

$175K - $308K/yr

The WebKit Performance team is looking for an engineer with a passion for software optimization to ... Experience with web technologies (HTML, CSS, JavaScript, SVG, WebGL, WebGPU). Experience with UIKit ...

Staffingine LLC

Javascript Engineer

Sunrise, FL · On-site

Javascript Engineer Job Location: Sunrise - Florida Job Type: Contract * We are looking for a ... Optimize backend performance and scalability for hightraffic applications * Write clean ...

TekWissen

UI Developer

Jersey City, NJ · On-site

$52.25 - $67.75/hr

Company Description Position: UI Developer Contract length: Up to 24 months Location: Jersey City ... JavaScript performance bottleneck • Familiar with web debugging tools like Fiddler, Firebug ...

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How much do javascript performance engineer jobs pay per hour?

As of Sep 11, 2026, the average hourly pay for javascript performance engineer in the United States is $60.11, according to ZipRecruiter salary data. Most workers in this role earn between $49.28 and $68.03 per hour, depending on experience, location, and employer.

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Infographic showing various Javascript Performance Engineer job openings in the United States as of August 2026, with employment types broken down into 1% As Needed, 87% Full Time, 10% Part Time, and 2% Contract. Highlights an 84% Physical, 2% Hybrid, and 14% Remote job distribution, with an average salary of $125,019 per year, or $60.1 per hour.

Senior Performance Engineer ID84179

Stratford, CT • On-site, Remote

AgileEngine
Software Development • 201 - 500 employees
Learn more about AgileEngineexternal

Full-time

This job post has expired today. Applications are no longer accepted.

Job description

AgileEngine is an Inc. 5000 company that creates award-winning software for Fortune 500 brands and trailblazing startups across 17+ industries. We rank among the leaders in areas like application development and AI/ML, and our people-first culture has earned us multiple Best Place to Work awards.

WHY JOIN US
If you're looking for a place to grow, make an impact, and work with people who care, we'd love to meet you!

ABOUT THE ROLE
We are looking for a Senior Performance Engineer to own and lead an enterprise-wide Performance Engineering function as a horizontal shared service across a global QSR digital ecosystem including web, mobile, kiosk, POS, loyalty, and payments systems. You will design and execute load, stress, and endurance tests using JMeter, k6, or similar tools, integrate automated performance validation into Azure DevOps CI/CD pipelines, partner with SRE and DevOps teams on chaos engineering experiments, and leverage AI-assisted workflows for performance planning and results triage.

WHAT YOU WILL DO
- Own the enterprise Performance Engineering charter as a horizontal shared service, establishing engagement models and SDLC performance-readiness standards.
- Design, script, execute, and report performance tests (load, stress, endurance, scalability) across high-volume ordering, kiosk, POS, loyalty, and payment flows.
- Identify and resolve bottlenecks across application, database, messaging, and infrastructure layers using observability signals (e.g., Dynatrace).
- Embed automated performance validation into CI/CD pipelines (e.g., Azure DevOps) with baseline and threshold gating.
- Partner with SRE/DevOps teams to define reliability targets and run controlled chaos-engineering experiments (fault/latency injection, dependency degradation).
- Define performance-readiness criteria, provide evidence-based go/no-go release recommendations, and assist with production performance-incident resolution.
- Integrate AI-assisted workflows into performance planning, test-design acceleration, and results triage while maintaining AI-consumable artifacts and safety guardrails.

MUST HAVES
- You must be authorized to work for ANY employer in the US (e.g., Green card holders, TN visa holders, GC EAD, H4 EAD, U4U with EAD), as we are unable to sponsor or take over employment visa sponsorship at this time;
- 4+ years of experience in performance engineering or non-functional testing at enterprise scale.
- Hands-on expertise with performance testing tools (e.g., JMeter, k6, LoadRunner, NeoLoad, or OctoPerf).
- Experience with enterprise observability and cloud monitoring platforms (e.g., Dynatrace).
- Demonstrated experience integrating automated performance validation into CI/CD pipelines (e.g., Azure DevOps).
- Scripting and automation proficiency in Java, JavaScript, or Python.
- Hands-on engineering experience in cloud environments (AWS or Azure).
- Hands-on experience using AI-assisted engineering tools, including reviewing and validating AI-generated output.
- Strong communication and stakeholder leadership skills with the ability to translate technical findings into clear business impact.
- Upper-intermediate English level.

NICE TO HAVES
- Direct experience partnering with SRE/DevOps practices on chaos engineering (fault/latency injection and dependency degradation testing).
- Prior experience supporting digital platforms within quick-service-restaurant (QSR), retail, or high-volume transactional ordering ecosystems.
- Experience maintaining AI-consumable artifacts (NFRs, workload models, baselines, thresholds) and defining AI guardrails.

PERKS AND BENEFITS
- Growth without limits: build your skills through mentorship, internal TechTalks, challenging projects, and a dedicated annual learning budget
- Competitive compensation: get recognition that reflects your skills and impact, with regular performance and compensation reviews
- Flexibility: work 100% remotely with flexible hours that support focus, autonomy, and a healthy work rhythm
- Meaningful, modern projects: build impactful products using modern technologies alongside global teams and leading brands
- Collaborative culture: join a supportive environment with zero micromanagement where ideas are welcomed and contributions are recognized
- Well-being & support: access local well-being programs and people-focused support tailored to your location