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Senior Fullstack Engineer (m/f/d) | Legal AI Tech Scale-Up | Full Remote

Xayn AG

Role overview

Qualifications

  • 3 years of professional Software Development experience
  • Proficiency in modern JavaScript/TypeScript and at least one major framework (React, Vue, Angular, or similar)
  • Solid experience with server-side languages and frameworks, understanding of RESTful API design
  • Working knowledge of relational databases (PostgreSQL) and familiarity with NoSQL solutions (e.g., Redis)

Responsibilities

  • Design, develop, and maintain features across our front-end and back-end systems
  • Collaborate with product managers, designers, and fellow engineers to translate requirements into well-architected, reliable software
  • Write clean, tested, and well-documented code with a focus on maintainability and long-term quality
  • Participate in code reviews

Key facts

Hard skills

JScript TypeScript React Jsx Python (Programming Language) Rust (Programming Language) PostgreSQL Systems Design Angular (Web Framework) Redis

Other skills

  • Communication
  • Collaboration

About the company

Xayn AG logo

Xayn AG

Company details

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Job description

Your team

As a Senior Fullstack Engineer (f/d/m), you will play a pivotal role in shaping and enhancing the user experience of our AI-driven legal solutions. Our B2B solutions are aimed at professionals who work in law research and legal advising. You will work closely with our design, engineering, and product teams to develop user-facing features across the entire stack, including frontend, backend, and automated testing.

You will join our Tech Team of around 32 people, including UI Engineers, UI Designers, AI Engineers, as well as Fullstack, Backend, and DevOps Engineers.

About you

  • Experience: 3 years of professional Software Development experience building and shipping web applications
  • Front-End: Proficiency in modern JavaScript/TypeScript and at least one major framework (React, Vue, Angular, or similar). Knowledge of accessibility best practices, plus. 
  • Back-End: Solid experience with server-side languages and frameworks, as well as an understanding of RESTful API design. We use Rust, TypeScript, and Python for our backends, so you should be familiar with at least one of these languages in a backend context. 
  • Databases: Working knowledge of relational databases (we use PostgreSQL) and familiarity with NoSQL solutions,e.g., Redis. 
  • Infrastructure: Familiarity with containerization (Docker), CI/CD pipelines, and version control (Git). 
  • Fundamentals: Strong grasp of data structures, algorithms, system design principles, and software engineering best practices. 
  • Communication: Ability to communicate technical concepts clearly to both technical and non-technical stakeholders. Comfortable working in a collaborative, cross-functional environment. 
  • Fluent in the English Language
 

Your responsibilities

  • Design, develop, and maintain features across our front-end and back-end systems
  • Collaborate with product managers, designers, and fellow engineers to translate requirements into well-architected, reliable software
  • Write clean, tested, and well-documented code with a focus on maintainability and long-term quality
  • Participate in code reviews
  • Contribute to architectural decisions, helping evaluate trade-offs and choose the right tools for the job
  • Identify and resolve performance bottlenecks, bugs, and technical debt across the stack.
  • Help improve engineering processes, tooling, and development workflows.

Our offer to you

Building Europe's sovereign Legal AI is ambitious, meaningful work — and we want the people doing it to be properly looked after. Our benefits are built around flexibility, real-time off to recharge, and the setup to do your best work from wherever you are.
  • Remote: 100% remote work possible (given a German residence), other countries upon request
  • Working hours: Flexible working hours
  • Vacation: 26 days + December 24th & 31st off, + 1 additional vacation day per year of employment (up to 30 days)
  • Discounts: e.g., Urban Sports Club Membership, depending on location
  • Equipment: Laptop (Lenovo or Mac), plus €1,000 net home office setup budget (paid with your first salary)

Senior-Level Salary Ranges gross per year:

  • Germany: €86k – €104k EUR
  • France: €70k – €85k EUR
  • Switzerland: 121k – 147k CHF
  • Sweden: 986k – 1.196k SEK
  • Austria: €83k – €101k EUR
  • Italy: €69k – €83k EUR
  • Poland: 250k – 303k PLN
  • Croatia: €51k – €62k EUR
  • Slovakia: €50k – €60k EUR

The actual offer within the range depends on your relevant experience, demonstrated impact, and interview outcome — not on negotiation skill or gender. In line with the EU Pay Transparency Directive, we are happy to discuss the criteria for placement within the range during the interview process.

For other countries you will get the information within your invitation to a potential interview.

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MR

Marcus Rivera

Chief Revenue Officer

m.rivera@company.com
linkedin.com/in/marcusrivera
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