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Sr. Software Engineer (JS, React, Redux, Go)

Sr. Software Engineer (JS, React, Redux, Go)

Job Locations 
US-NY-New York

More information about this job


MediaMath’s strength is in numbers.  Our technology analyzes 200 billion customer opportunities daily– more volume than the top 10 stock exchanges in the world, combined. 

Over 700 Mathletes in 16 global offices are trusted by two-thirds of the Fortune 500 and partner with thousands of marketers to ensure brands connect with right audiences, in the right place, in the right time.


We believe consumers want to have meaningful conversations with their favorite and yet-to-be-discovered brands across all digital touchpoints. Our omnichannel, integrated programmatic platform unites digital media and big data to maximize the return on every marketing dollar spent by making advertising relevant, personalized, measurable and controllable.   From inventing the DSP category in 2007 to being named a DMP Forrester Challenger (our first year participating in the DMP Wave!) in 2017, we continue to deliver results for marketers more quickly and accurately than any other solution. 

Technology is changing the way brands interact with consumers.  MediaMath is powering that change.  Come be a part of it!


We’re looking for a full-stack Senior Software Engineer to head up a close knit, solutions-focused team. You want to learn and be challenged. You’re well spoken, team-oriented, and can effortlessly navigate interactions from client to C-class to application engineer. You’ve got a solid background in web technologies, an eye for user experience, and a vision for how a successful product should work. Sounds like you? Read on! 


  • Developing airtight solutions: You’ll pair with our Product team to break down business requirements into well-architected, readable, testable, and maintainable software.
  • Connecting people: Help other team members to grow as engineers through code reviews, pairing, and mentoring.
  • Delivery focused: You’ll balance timelines and business priorities with technical feasibility, then communicate the best, most strategic way forward.



  • 5+ years of relevant software development experience using JavaScript, HTML and CSS.
  • 3+ years of relevant experience with Node.
  • Solid history of delivering web applications and full stack development, with a focus on the UI stack.
  • Fluency in vanilla JavaScript – client-side and Node; ES3 to ES2015+.
  • Experience leading teams (full-stack development team experience is a bonus).
  • Fundamental understanding of modern JavaScript development – React, Redux and Webpack are a must.
  • A natural communicator with a passion for great user experiences.
  • Strong software development fundamentals (data structures, algorithms, problem solving…).
  • Knowledge of how the web works and how to make it efficient (HTTP, caching, page rendering…).
  • Experience with performance and debugging tools like Chrome’s Dev Tools.
  • Experience in an Agile environment.

Bonus Skills:

  • Experience with Go, Docker, MySQL, Kafka and AWS.
  • Experience with testing frameworks (Nightmare, Mocha, Chai, Jasmine, Selenium…).


MediaMath is privately held, employee owned, and headquartered in New York. Mathletes enjoy: Company equity. Performance Bonus. Comprehensive Insurance. Global Internal Mobility. Open Paid Time Off, Philanthropy and Holidays. 401(k) match. Paid Parental Leave. Cell Phone Reimbursement. Modern office space. Onsite Fitness & Wellness.