Senior Software Engineer - Ruby on Rails (f/m/d) arbeitnow Pair Berlin (Hybrid) · 10/4/2026

Primetime; Berlin; Hybrid; EUR 77,000 - 92,000; Full time

Benefits offered by this job

Visa sponsorship

Learning budget

German and English language courses

28 vacation days

Pension plan

Public transport Deutschlandticket

Job summary

PAIR Finance in Berlin is hiring a senior software engineer to own end-to-end delivery on an AI-enabled debt-collection platform. You will drive architecture, build backend services, and work closely with product to shape the roadmap in a hybrid work setting.

The role requires 5+ years of experience, strong Ruby on Rails skills, and comfort with Go or Python. English communication is essential, with a focus on scalable, secure systems and AI-augmented development.

Qualifications

• Minimum 5+ years of professional software engineering experience.
• Strong backend experience with Ruby on Rails as core stack.
• Hands-on with Go and/or Python is a plus.
• Ability to scope, drive, and deliver with minimal supervision.
• Experience with TDD and CI/CD practices.
• Comfortable in an Agile environment (Scrum/Kanban).
• Interest in AI-based technologies and architectures.
• Proficient English communication.

Responsibilities

• Own a clear scope end-to-end and drive delivery within your team.
• Design, build, and run rapid POCs to de-risk decisions.
• Develop, optimize, and maintain core backend services.
• Contribute to high-level architecture for scalability and security.
• Deep-dive into the In-Court/After-Court domain knowledge.
• Collaborate with product to shape the roadmap and growth.
• Leverage AI tools and practices in development and review.
• Stay current with industry trends and share insights.

Skills

5+ years experience

TDD

CI/CD

Agile (Scrum/Kanban)

English communication

Independent ownership

AI familiarity

Tools

Ruby on Rails

Go

Python

AWS

Terraform

Docker

Linux

Job description

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.

Type: Hybrid

Are 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 onhigh-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 evolveand 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 inRuby (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

Nice to have:

• Experience in the financial or accounting industry
• Frontend development experience, especially Vue.js and GraphQLknowledge
• 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

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 ----- - we look forward to hearing from you!
For more information about PAIR Finance, please take a look at our website and our careers page .

This overview was written from the original listing to help you understand the role. Always confirm the specifics on the employer’s application page.