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Senior Software Engineer, Mark Simpson brings over 20 years of software development experience to Def Method. He has been involved in software architecture and design, coaching and mentoring and development in numerous environments, domains and team sizes. He has extensive experience in the design and implementation of diverse technologies.



  • Worked closely with end-users and product managers to implement back-office tools for managing blockchain assets including the customer's own crypto-currency. Learned programming languages and technologies (Go & Docker) on the fly to get the needed work done with the client-team didn't have the bandwidth to work on those parts.

High-end Real Estate

  • Worked with client team to produce new version of broker facing property search application, while maintaining and integrating features from the old system.

  • Consulted on Agile practices such as retrospectives and helped make them 'stick'.


  • Added features to existing application to make it useful/usable by a new set of users.

  • Learned/reacquainted languages/technologies on the fly to get the job done.

  • Learned, then taught, customer team how to test and write redux-saga code which was in the codebase but unfamiliar to current customer team.


  • Consulted with team to reinforce Agile processes (regular retrospectives, more informative iteration planning meetings).

  • Configured management tool adhering to ITIL standards to maintain application environments and availability


  •  Developed software for a mission critical detailed network discovery, device monitoring, topology visualization, and RCA tool.

  • Worked with the client team to extend and maintain the application which helps postgraduate programs market to students by building flexible jQuery based web form plugins to gather student information and interest quickly and seamlessly.

B2B Data Centers

  • Took over (unfinished) product from previous vendor and brought it to a state where an MVP could be released and produce useful information.

  • Worked with customer to narrow the MVP definition.

Connect with Mark

Cambridge, MA (hometown)

New York, NY (current city)

Bachelor of Science in Computer Science, Worcester Polytechnic Institute Worcester, MA

Typescript,JavaScript, React.js, Redux, Angular.js, Clojure, Common Lisp, CSS3, Docker, Heroku, MongoDB, MySQL, Python, ReactiveX, Redis, Ruby

Mark Simpson

Senior Software Engineer

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