Fanatics · 11 hours ago
Senior Software Engineer
95 Morton St, New York, NY, 10014, US
Full-time
Onsite
Mid, Senior Level
$122K/yr - $173K/yr
7+ years expFanatics is seeking a Senior Load & Performance Engineer to own performance engineering for high-scale, real-time, event-driven systems. This role involves designing and executing distributed load tests, building scalable performance frameworks, and ensuring systems perform well during peak sporting events.
RetailManufacturingGamingSportseSportsSporting Goods
Responsibilities
Own end-to-end performance testing strategy for real-time and transactional systems
Design and execute load, stress, spike, endurance, and soak tests in production and pre-prod environments
Define performance baselines, SLOs, and regression thresholds
Drive shift-left performance validation during design and development
Design distributed WebSocket load tests supporting 100,000+ concurrent connections
Architect parallel test execution across multiple Kubernetes pods using CI/CD orchestration
Model realistic traffic patterns for: Sportsbook odds updates, Bet Builder workflows, Real-time market data streams
Prevent resource exhaustion issues (OOM, CPU saturation) through smart test distribution and profiling
Build and evolve K6-based performance frameworks
Integrate tests into GitHub Actions pipelines with configurable parallelism
Use Testkube for Kubernetes-native test execution
Implement dynamic test profile generation (no-code-change test tuning)
Enable fast iteration during live events without redeploying code
Implement production-grade security for performance tests using: AWS SSM Parameter Store, CSI Secrets Store Driver, IAM Roles for Service Accounts (IRSA)
Ensure zero hardcoded secrets, strict environment isolation, and full auditability
Leverage Datadog, metrics, logs, and traces to: Identify bottlenecks, Validate SLOs in real time, Produce actionable post-test analysis
Partner closely with backend engineers, SREs, and platform teams
Translate performance findings into concrete engineering actions
Influence architectural decisions with data, not opinions
Act as a performance authority during game days and production readiness reviews
Qualification
Required
7+ years of experience in performance, load, or scalability engineering
Proven experience testing distributed, cloud-native systems
Strong hands-on experience with K6 (or Gatling/Locust with willingness to go deep in K6)
Experience with WebSocket performance testing at scale
Solid programming skills (JavaScript, Java, Python, or similar)
Deep understanding of concurrency, async processing, and event-driven systems
Deep understanding of HTTP, WebSockets, messaging/streaming patterns
Experience running tests in Kubernetes environments
Strong skills in performance analysis and root-cause investigation
Comfortable working in production environments with guardrails
Preferred
Experience with sports betting, gaming, financial trading, or real-time data platforms
Prior ownership of game day / peak traffic testing
AWS experience (EKS, IAM, SSM, CloudTrail)
Experience with CI/CD-driven performance testing
Experience with Chaos or resilience testing
Experience with Capacity planning and traffic forecasting
Familiarity with Testkube or similar Kubernetes-native test orchestration
Benefits
Medical
Dental
Vision
401K
Paid time off
GymPass
Pet Insurance
Family Care Benefits
Free Shipt deliveries
$500 to set up your home office
Company
Fanatics
Fanatics is a global sports platform reimagining the fan experience across gear, trading cards, sports betting, content, events, and more. It is a sub-organization of Kynetic.
10001+ employees
H1B Sponsorship
Fanatics has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2021 (2)
Funding
Current Stage
Late StageTotal Funding
$4.9BKey Investors
Clearlake Capital GroupNational Football LeagueAlameda Research
2022-12-06Private Equity· $700M
2022-03-02Private Equity· $1.5B
2022-01-01Series Unknown· $10M
Leadership Team
J
Joseph Bozich
Advisor to Chief Executive Officer
Michael Mahan
CEO
Recent News
Sports Business Journal
2026-02-08
2026-02-07
Sports Business Journal
2026-02-07
Company data provided by crunchbase