# Senior Software Engineer - Ruby on Rails (f/m/d) at Pair

> Hybrid · Germany · Senior · Software engineering · open. Source: https://alderhq.app/jobs/personio%3Apair%3A2785088 (read 2026-11-09).

## Facts (observed)

- Company: [Pair](https://alderhq.app/companies/pair)
- Location text: Berlin (Hybrid)
- Where it can be done from (inferred): Hybrid · Germany (evidence: "Location: Berlin (Hybrid)")
- Posted: 2026-09-07 (62 days ago)
- First seen by alder: 2026-11-04 · last verified: 2026-11-08
- Reposted: 0 times · edited: 0 times
- Apply on the employer's site: https://pair.jobs.personio.de/job/2785088
- Skills listed (inferred): JavaScript, Vue, Node.js, Python, Go, Java, Rust, Ruby/Rails, GraphQL, AWS, Docker, Terraform

## Pay and sponsorship

- Posted pay: €77k–€90k per year (from the description)
- Market band for similar posted roles (Berlin, n 16): p25 €86k, median €101k, p75 €125k

## Description (the employer's text)

### 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: 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 domain (the legal and procedural knowledge behind our 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 - €90,000 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?

For more information about PAIR Finance, please take a look at our website and our careers page.

---
Data: alder (https://alderhq.app). Cite https://alderhq.app/jobs/personio%3Apair%3A2785088 and the date you read it. Observed facts come from the employer's own listing; location reach, level, family and skills are inferences.