Senior Fullstack Engineer


Postmark is a cloud email infrastructure product that allows businesses to send and receive transactional emails from their applications. We make it easy for our customers to add email communication to their applications using a full-featured REST API, as well as through the standard SMTP protocol.


What’s it like to work on Postmark

A Postmark backend engineer will primarily write C# code to improve and enhance the API and backend services. You will use/improve/scale out our infrastructure software which currently consists of MySQL, RabbitMQ, and Elasticsearch.


You may be a fit for this role if you:

  • Have built web apps using Ruby, Rails, and JavaScript.
  • Are familiar with the JavaScript, Ruby, and Rails ecosystems.
  • Can integrate with web APIs from Rails or JavaScript.
  • Know how to optimize and maintain a SQL database like MySQL.
  • Can work with and maintain a document/NoSQL database like Elasticsearch.


Preferred education and experience:

  • Understand API frameworks like GraphQL.
  • Experience using containerization technologies like Docker.
  • Have used concurrency concepts like Promises and/or Async/Await.
  • Understand when and how to leverage a message queueing system like RabbitMQ.
  • Familiarity with email specific topics such as SMTP, SPF, DKIM, DMARC, etc.



  • Remote-first culture with half the team in Philly and half the team working remotely from all over the world
  • Chef-prepared family lunches (in Philly office)
  • Full health benefits (100% paid for employee and spouse/dependents)
  • Company-paid retreats
  • Computer setup of your choice renewed every 2 years
  • Quarterly profit sharing
  • Conferences and career development
  • Currently experimenting with a 4 day work weeks with flexible hours




Wildbit is the loving creators of Postmark, Conveyor, and Beanstalk. We are an equal opportunity employer and proud of it.


We’re committed to building a diverse team, and all qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status. At our core, we believe deeply in diversity, inclusiveness, and acceptance as all being key parts of a healthy team. 




Our values


Syncing remote culture


How was your weekend


Planning a company retreat

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