Mast is solving one of the most important problems in lending: Speed. ​Our mission is to empower mortgage lenders and leverage technology to enable them to focus on what they do best – lending. Mast is building cloud-native mortgage technology infrastructure to help lenders process more mortgage applications in less time. We want to help lenders get to a mortgage decision faster and more efficiently, transforming the buying journey for the borrower.


You'll work closely with team to support the engineering effort on the Mast platform – scoping user stories, participating in sprint planning, and writing and deploying great code.

We're very much inspired by the Pivotal Way.

  • Work with the engineering team to ideate on and build the Mast platform
  • Write thoughtful, high-quality code – using TDD where possible
  • Proactively maintain and improve our codebase
  • Be a technical project owner, driving projects from kickoff to completion
  • Lead product improvement drives, and independently identify potential product improvements
  • Support product improvement drives and independently identify potential product improvements
  • Build the front-end of applications through appealing visual design
  • Work on integrations with other potential partners and on APIs
  • Test software to ensure responsiveness and efficiency
  • Troubleshoot, debug and upgrade software
  • Help us build our internal processes, including technical architecture, release management and hiring


  • 5+ years experience in web application design and development
  • Strong experience with our core tech stack: Ruby, Rails, and JS front-end frameworks
  • Strong experience creating and deploying complex web applications that are scalable, manageable and performant
  • Experience writing automated unit, integration and end-to-end tests in RSpec
  • Working knowledge of Unix-like operating systems
  • Ability to work independently in a team environment
  • Willingness to pair program on occasion!


  • Experience of pairing, Agile, TDD
  • Knowledge of banking/finance
  • Previous experience at a startup
  • Pension plan
  • Flexible working culture (office in central London)
  • 25 days holiday + bank holidays
  • Equipment budget
  • Learning & development budget
  • Cycle to Work Scheme
  • Donuts every Thursday
  • Stock Option Plan
Mast. is an equal opportunity employer and we celebrate diversity and are committed to creating an inclusive environment for all employees.
Founded in 2020, Mast is a venture-backed fintech building cloud-native mortgage origination technology infrastructure to help lenders increase capacity, reduce costs and strengthen operational controls.

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