Mast is on a mission to make complex lending simple. The UK's specialist lending market is underserved by technology, with legacy systems that can't handle the nuance of complex income, niche products, or the broker workflows that specialist lenders rely on.
We're building modern, cloud-native lending technology, purpose-built for specialist lenders, that helps them process more applications in less time, reach decisions faster, and deliver better experiences for brokers and borrowers.
We're pioneering the use of AI in mortgage origination, building it into the platform from the ground up rather than bolting it onto legacy architecture.. We work with regulated lenders across the UK, have a 100% delivery track record, and are building a high-performance team where everyone has real ownership and direct impact.
ResponsibilitiesYou'll work closely with team to support the engineering effort on the Mast mortgage origination platform. We're growing the team to be able to ship more features and onboard more clients. But we're still a small team, so everyone's expected to pitch in to all parts of the product and engineering lifecycle. We’re looking for someone who thrives under pressure, moves fast, and delivers with urgency.
We rely heavily on Rails, Vue3 for more complex front-end pieces, Heroku for our infrastructure, and AWS.
Our interview process is an initial phone screen, a take-home code task, and a half-day on-site (or remote) pairing session. We promise not to ask you any trick questions or make you code on a whiteboard!
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
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
Troubleshoot, debug and upgrade software
Learn and understand our infra stack - Heroku + AWS
Build systems to automate as much of the developer experience as possible
6+ years experience in web application design and development
Strong experience with Rails, which is at the core of our tech stack. Experience with JS front-end frameworks is a bonus, especially Vue3
Strong experience creating and deploying complex web applications that are scalable, manageable and performant
Willingness to pair program regularly! When you join you'll get a Tuple account for seamless remote pairing
Comfortable using AI tools as part of your development workflow
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
Self-directed with strong execution skills
• Work digital-first in your daily life
DesirableExperience of pairing, Agile, TDD
Knowledge of banking/finance/fintech
Previous startup/scale-up experience
Cloud computing experience
Infrastructure as code experience
Experience with DevOps culture and teams owning their infrastructure
Willingness to learn new technologies in a fast-paced startup environment.
Excellent communication skills to work across teams.
• A pragmatic mindset, focusing on solutions that drive efficiency.
Salary Range
£80,000 - £90,000 + Stock Options
Please note that we are unable to sponsor visa applications at this time.
Benefits
Stock Option Plan
25 days holiday + bank holidays
4 - 10 weeks work from anywhere, based on tenure (for UK based roles)
Vitality Health insurance
Pension plan
Equipment budget
Learning & development budget
Cycle to Work Scheme
Monthly team socials + Quarterly Team Meet-ups @ HQ
Digital-first, employee-first company with a flexible working culture + Central London HQ
About Us
Mast is a high-performance team of engineers and lending experts building the future of specialist lending technology. We value radical honesty, transparency, and speed. We hire exceptional people, expect a lot from each other, and offer real ownership, fast growth, and the chance to shape an industry.
Mast. is an equal opportunity employer and we celebrate diversity and are committed to creating an inclusive environment for all employees.
Skills Required
- 6+ years experience in web application design and development
- Strong experience with Rails
- Experience with JavaScript front-end frameworks (Vue3 a bonus)
- Experience creating and deploying scalable, performant web applications
- Willingness to pair program regularly
- Comfortable using AI tools as part of development workflow
- Experience writing automated unit, integration and end-to-end tests in RSpec
- Working knowledge of Unix-like operating systems
- Ability to work independently within a team
- Self-directed with strong execution skills
- Work digital-first in daily life
- Experience with Agile, TDD and pairing (desirable)
- Knowledge of banking/finance/fintech (desirable)
- Cloud computing and infrastructure-as-code experience (desirable)
- Experience with DevOps culture and teams owning infrastructure (desirable)
What We Do
Mast is building cloud-native mortgage technology infrastructure to help lenders increase capacity, reduce costs and strengthen operational controls. Our mission is to bring transparency, clarity and speed to borrowers by partnering with lenders and allowing to operate more efficiently, react faster to changing market conditions, and focus on offering the best service possible.
