Lead Performance Tester, Vonage
Software Development Engineer in Test
Cloud-based communications APIs
Open for applications
Cloud-based communications APIs
1001+ employees
Open for applications
1001+ employees
Company mission
To make communications more flexible, intelligent, and personal to help enterprises stay ahead.
Role
Who you are
- Proven experience mentoring and coordinating testing efforts across large, distributed engineering teams (e.g., conducting code reviews, guiding SDETs through framework adoption, and managing cross-team test schedules)
- Strong hands-on experience with AWS cloud services (EC2, ECS, RDS, API Gateway) with a focus on scalability and performance optimisation
- Proven expertise in performance testing tools (specifically k6, along with JMeter or Gatling), including test design, execution, and analysis at scale
- Hands-on experience with production traffic shadowing or replay tools (such as GoReplay)
- Deep experience testing distributed systems, message brokers (Kafka, RabbitMQ), microservices architectures, and high-volume, low-latency APIs
- Solid backend programming and scripting skills in Python, Java, or TypeScript to build custom performance frameworks and tooling
- Strong understanding of system design, concurrency, throughput, latency, and fault tolerance principles
- Experience implementing performance testing within CI/CD pipelines (Jenkins, GitHub Actions) and enabling continuous performance feedback loops
- Hands-on experience with observability and monitoring tools (Grafana, Coralogix, PMM) for performance analysis and diagnostics
- Experience working within Agile environments and translating performance insights into actionable engineering outcomes
- Demonstrable hands-on experience in backend performance engineering and automation using Python, Java, or TypeScript
- Proven track record of performance, scalability, and resilience testing in AWS-based cloud-native systems
- Strong experience designing large-scale performance test strategies and leading QA/SDET teams to execute them
- Deep understanding of API performance testing, integration testing, and system-level non-functional validation
- Solid grasp of system architecture, distributed systems behaviour, and non-functional testing methodologies
- Experience with observability, monitoring, and log analysis tools
- Familiarity with RESTful APIs and event-driven systems
- There’s no perfect candidate. You don't need all the preferred qualifications to make a valuable impact on our team. Our employees and customers come from diverse backgrounds, so if you're passionate about what you could achieve at Vonage, we'd love to hear from you
What the job involves
- Define and lead the performance engineering strategy across high-availability, cloud-native telecom platforms
- Lead, train, and coordinate a distributed guild of SDETs across multiple feature teams, guiding them to build, maintain, and execute performance scripts (k6) within their fractional sprint capacity
- Design, develop, and evolve scalable backend performance frameworks using k6, Python, Java, or TypeScript, focusing entirely on APIs, databases, and infrastructure
- Implement and manage production traffic replay strategies (e.g., GoReplay) and complex multi-tenant test data generation to accurately recreate realistic production contention and load profiles
- Own and drive performance, load, stress, endurance, scalability, and resilience testing, including chaos engineering practices (e.g., using AWS Fault Injection Simulator)
- Validate real-time communication systems, event-driven architectures (Kafka, RabbitMQ), and high-throughput distributed systems under production-like conditions
- Integrate performance testing into CI/CD pipelines, enabling continuous performance validation, shift-left practices, and automated PR blocking for latency degradation
- Leverage observability tooling (Grafana, CloudWatch, Coralogix, VictoriaMetrics, PMM) to monitor, analyse, and troubleshoot system performance
- Establish performance benchmarks, SLAs, SLOs, and error budgets aligned with business and system requirements
- Collaborate with architecture and data teams to identify bottlenecks, validate database architectures (e.g., MySQL, Tungsten), and present evidence-based investment proposals
- Analyse and optimise performance across both legacy monolith systems (requiring integrated load testing) and modern microservices architectures
Application process
- Application Requirements:
- Updated CV clearly demonstrating performance engineering leadership, cross-team coordination, AWS expertise, and backend automation frameworks
- Summary of performance testing frameworks, tools (e.g., k6, GoReplay), and CI/CD methodologies implemented
- Detailed examples of performance testing engagements (scale, environments, bottlenecks identified, business impact, improvements delivered)
- Evidence of driving performance strategy, mentoring QA/SDET teams, and influencing architecture
Our take
According to Vonage, technology should make business communication easier, but it currently makes it more complicated due to the various communication platforms that users need to spend time learning how to use. Moreover, users often realize that the platform is not the right choice for them after wasting a lot of time understanding how to navigate it. Vonage aims to change this by providing enterprises with a flexible cloud communications platform that simplifies business communication.
Vonage offers a unified communications solution that is easy to understand and use every day. The platform integrates communication via voice, messaging, video, and data and gives clients the flexibility to choose from a wide range of tools and integrations or to create new ones using Vonage's APIs.
Following its acquisition by Ericsson - a multinational networking and telecommunications company - Vonage has been focused on expanding its presence in wireless enterprises and broadening its global offerings. As part of this, it recently announced a collaboration with AWS, to integrate Amazon Nova Sonic with the Vonage Voice API. This collaboration further strengthens Vonage;'s position in the rapidly growing AI-driven communications market and lays the groundwork for accelerated innovation and global growth.
Steph
Company Specialist at Welcome to the Jungle
Insights
-2% employee growth in 12 months
Company
Funding (last 2 of 5 rounds)
Aug 2005
$200m
SERIES E
Aug 2004
$105m
SERIES D
Total funding: $372m
Company benefits
- Medical, Dental, & Vision Coverage
- Paid Time Off
- Tution Reimbursement
- Retirement Plan
- Maternity/Paternity Leave
- Health Savings Account
- Legal Plan
- Auto, Home, & Pert Insurance
- And More!
Company HQ
Holmdel, NJ
Leadership
Niklas Heuveldop
(CEO)Niklas has been part of Ericsson since 2005, joining as a VP of Sales American Business Unit Networks. Since then, he has held numerous roles and became the CEO of Vonage and Head of Business Global Communication Platforms in 2024.
Pam Hehn Schroeder
(CFO)Pam has been part of Ericsson since 2001, joining as a Finance Leader, REgions, Broadband & Media Accounts. Since then, she has held a number of roles and became CFO of Vonage in 2024.
Neelam Sandhu
(CMO)Neelam joined Vonage as CMO in 2025. Prior to this, she spent 15 years at BlackBerry as CMO and CCO.
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