Senior Software Engineer - Ruby on Rails (f/m/d)
PAIR FinanceAre you ready to change the market?
At PAIR Finance we're building the AI-driven platform that's redefining debt collection across Europe. We're looking for a senior software engineer who takes ownership end-to-end, is comfortable being the technical driver of a well-defined scope, and is energized by learning a deep, high-stakes domain: the legal processes around In-Court and After-Court debt collection.
Your Responsibilities:
- Own a clear scope end-to-end: take initiative from idea to production largely independently, and lead within your team (T-shaped: you go deep on your slice, and pair with one other developer)
- Design, build, and run POCs quickly to de-risk decisions before committing to a full build
- Develop, optimize, and maintain our core backend applications and services
- Work on high-level architecture to ensure scalability, performance, availability, and security
- Go deep on the In-Court/After-Court domain (the legal and procedural knowledge behind our
collection processes is a core part of the job, not a side detail) - Collaborate closely with product to shape the roadmap and unlock further company growth
- Work AI-augmented: you already use (or are ready to adopt) tools like Claude Code as part of how you build, review, and ship
- Help evolve and enhance our AI-based platform
- Stay current with industry trends and bring ideas back to the team
What we're looking for:
- 5+ years of professional software engineering experience, including 1+ year on medium-to-large
projects - Strong backend experience in Ruby (Ruby on Rails): this is our core stack, and required for the
role - Language-agnostic mindset: you pick the right tool for the job (hands-on experience with Go and/or Python is a big plus)
- Proven ability to work independently: scope, drive, and deliver a project with minimal hand-holding
- Experience with TDD and CI/CD
- A track record of writing clean, maintainable backend code and solid infrastructure
- Comfortable in an Agile environment (Scrum, Kanban)
- Genuine interest in working with, and building on top of, AI-based technologies
- Solid English communication skills
- Experience in the financial or accounting industry
- Frontend development experience, especially Vue.js and GraphQL knowledge
- Infrastructure experience: AWS, Terraform (IaC), Docker, Linux
Knowledge of other backend technologies, such as Node.js, Rust, or Java
Our offer for you:
- For this senior-level role, our salary band is €77,000 - €92,000 gross per year (based on a 40-hour work week). The exact offer will reflect your experience and qualifications
- We offer visa sponsorship
- Thriving, financially stable company
- Strong experienced international team to support and mentor you along the way, smooth onboarding process
- International team of 30+ nationalities with professionals and experts
- Flat hierarchy, transparent and appreciative feedback culture, monthly all hands meetings, annual feedback and evaluation cycle, regular 1-on-1s with your lead
- Well-structured onboarding process as well as supportive and welcoming colleagues
- Personal learning & development budget as well as German and English language courses
- Unlimited employment contract, flexible working hours and 28 vacation days for your work-life balance
- Company pension plan, partly covered Deutschlandticket (public transport) and access to “Corporate Benefits”-voucher platform to ensure your full well-being
- Fun company summer and Christmas parties as well as regular team events
- This role is based in Berlin, and we have a hybrid working policy. Modern office near Uhlandstr. is complete with fresh fruit, muesli and drinks for a comfortable and enjoyable workplace
Our Interview Process:
Who is your contact person?
Your contact person for this position is Geneva Brooks. If you have any questions, please contact us directly by email (jobs@pairfinance.com) - we look forward to hearing from you!
For more information about PAIR Finance, please take a look at our website and our careers page.