Summer Internship Program

Gain hands-on experience at the bench or in other aspects of business. Learn valuable technical skills from our knowledgeable CST scientists and business leaders. View our Application for Internship.

Learn More

Upcoming Events

Come visit Cell Signaling Technology (CST) at one of the upcoming conferences or vendor shows we are attending. Please stop by the CST booth to meet with one of our scientists, learn about new products, pick up some reference material or simply stop by to say hello.

Event Listing

News From the Bench

News from the Bench

Discover what’s going on at CST, receive our latest application notes, science features, and more.


Application Performance Engineer

Danvers, MA

Cell Signaling Technology, Inc. (CST) is a worldwide leader in the development and commercialization of antibodies, assays and research tools. As a company of scientists for scientists, we have developed PTMScan®, a technology to discover protein post-translational modifications, PhosphoSitePlus®, an online resource for investigation of post-translational modifications, and XMT® technology, a proprietary method to develop exceptional monoclonal antibodies. We are fully committed to developing new research tools to help define the mechanisms underlying cell function and disease, thereby broadly accelerating progress in biomedical research and medicine.

We are seeking an experienced Application Performance Engineer to support Cell Signaling Technology’s Commercial System platforms. The Performance Engineer will be responsible for defining, building and managing an application performance program to ensure functional, performance, and security measures are developed, applied, and monitored for globally utilized on-premise and cloud hosted applications. The Engineer will proactively monitor and optimize performance bottlenecks, JVM metrics, perform troubleshooting and root cause analysis, address performance and security issues, build and implement automated testing, provide expertise regarding cloud hosting scalability and performance.


  • Develop performance test plans and defines approaches for end-to-end performance
  • Ensure high-level of quality by validating performance, stability, scalability, and reliability in our application solutions
  • Develop, design, and document an improved performance, monitoring, and test automation framework
  • Collaborate with system engineers and development teams to effectively test the system under test
  • Initiate and facilitate design reviews and perform code inspections leading to optimizations
  • Continuously evaluate ways to improve application performance and reliability
  • Create detailed documentation and provide presentations and training on automation framework/tools/tests developed


  • Bachelors in Computer Science or equivalent experience
  • 4+ years software performance experience, test automation development, and end to end testing
  • 3+ years of experience with load testing and testing tools, such as LoadRunner, Load UI and JMeter and monitoring tools (Dynatrace, Nagios, Solarwinds)
  • 3+ years of experience with the web services testing
  • 2+ years experience with synthetic monitoring tools (Selenium)
  • 2+ years experience with defect tracking and automation tools
  • Experience with proactive monitoring of customer facing applications and internal business applications
  • Experience with Database monitoring and detective monitoring
  • Experience working in an agile development environment with strong emphasis on performance and QA, as well as best practices for development, processes, code management, and build environments is preferred


You will be taken to an external website, please attach your cover letter and resume as one document and refer to job code PERFENG-2016-N when applying.