job
Information Technology
On-site
Sponsorship Not Stated

Software Engineer - Full Stack

Mast
Germany
Verified OpportunityChecked by PathwayAI staff.

Role Summary

Join Mast as a Full Stack Software Engineer to innovate lending technology and enhance product functionality in a growing team.

About the Organisation

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.

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Key Responsibilities

You'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

Minimum Requirements

Salary Range

  • 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
  • Experience 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.
  • £80,000 - £90,000 + Stock Options

Working Conditions

  • 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

Eligibility Criteria

No explicit eligibility information for international applicants is provided.

Exp. LevelNot specified
EducationNot specified

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Published On
August 5, 2026
Application Deadline
Ongoing / No specific deadline
Location
MastHQ
Employment Type
Full Time • On-site
Source
Arbeitnow
Last verified: August 9, 2026
Visa Sponsorship
Sponsorship Information Not Stated
Africa Eligibility
International — African Eligibility Unclear
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